Re: [Elecraft] LP_Bridge and Windows Vista
On Mon, 26 Jan 2009 23:50:33 -0800, you wrote: What's the trick to getting LP_Bridge to run with Windows Vista?? I can get it to run and connect to the K3, but I can't get it to create the virtual comm Port for HRD. Cannot create virtual port. TIA Adam - ka7ark [snip] Adam, I'm running it on Vista Business 64 bit and seem to recall that there was some trouble getting it to work with LP_BRIDGE. I switched to Ham Radio Deluxe and all is fine here. Tom, N5GE http://www.n5ge.com http://www.swotrc.net ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3/100 and the PSU
Everyone knows it is important for the K3/100 to receive a solid DC supply. If the supply drops significantly when high current is drawn several effects may occur: 1 - The Transmitted signal becomes wider than it should be 2 - The power control loop is upset leading to unstable output power 3 - In severe cases the radio might shut down, or engage sulk mode. Of course this does not apply to us, we are all experienced constructors and never make mistakes when wiring up our shacks. Like many people I run my K3 from a 13.8V DC supply that also supplies other items, in my case XV transverters, an LP100, an LDG ATU etc. This supply is very good (tnx BNOS, 1980s) and only varies by a few 10s of mV between no and full load. Originally when installing my K3/10 I used the supplied DC cable via a powerpole distribution board with an appropriate fuse. In fact this particular board had two fuses, one 30A one at the input and one at the output plus around 1 metre of thick cable to the supply. This worked fine. Later I upgraded to the 100W KPA3, and of course changed the fuse in the distribution board. The DC voltage drop according to the K3 at 20A was over a volt, much no doubt due to the fuses and extra connections through the distribution board. A 1 volt drop is not a problem for the K3 but will cause more IMDs on SSB. I now connect the K3 directly to the PSU with as short a DC cable as is practical. It would be even better to use voltage sensing so the supply is regulated at the K3 end of the cable. Mike -- View this message in context: http://n2.nabble.com/K3-100-and-the-PSU-tp2223048p2223048.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] SSB IMD
Hi Joe A device like the Mitsubishi RD100HHF1... This device is used in most of the current Yaesu and Icom radios. It has very respectable IMD figures for a 12 volt device. The 5th order figures with the Idg at 1 amp is very good at -50dbc. Even with IDg set at 0.5 amps the figures are still very respectable, for 12 volt devices. The QST review for the FT950 which uses these devices returned some very good IMD figures for this model radio. http://myweb.tiscali.co.uk/radiokits/radio-related/Linear_PA/linear.htm Look at the application note on the RD100HHF1. I cant find this application note on the Mitsubishi web page so who knows if the data is accurate. Its the first published IMD figures that I have seen for recent Mitsubishi RF power devices. 73 Craig VK3HE I would be careful here ... the Toshiba 2SC2879 data sheet clearly does -38dB IMD at 60 watts with VCC=12.5V. There are certainly devices capable of that level of performance means that there are devices capable of that level just as there are devices capable of similar levels of performance at 120-140 watts per device with Vcc=28V. I would expect the 2SC2879 to also be capable of this level of performance ... if not, I would have expected the design of the KPA3 to have been based on another device. 73, ... Joe, W4TV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3/100 and the PSU
Yes I´m beginning to think that K3 is more sensitive to PS then other radios, right now it looks that way. Then this should be in the manual!!! What happens is if I have a bad signal on the bands I will together with Elecraft get a bad reputation. I will of course tell everyone what I´m running and do have it operating exactly according to the manual. If this PS deal is the case with the K3 I quite understand and it´s no problem to me what so ever but it should be in the operating manual. Every user of a K3 should not need to be a super engineer and have to figure out things like this them self. This morning I increased PS voltage to 14.6V (14.2) under load, I was at 13.9V (13.5 load) before, I could see a slight improvement in IMD (1-2 dB). I am using the supplied high performance cable from Elecraft and IMO it does not have enough Cu area. Next But if Elecraft supplies it and it´s not good enough, what can I say? / Jim SM2EKM -- AD6XY wrote: Everyone knows it is important for the K3/100 to receive a solid DC supply. If the supply drops significantly when high current is drawn several effects may occur: 1 - The Transmitted signal becomes wider than it should be 2 - The power control loop is upset leading to unstable output power 3 - In severe cases the radio might shut down, or engage sulk mode. Of course this does not apply to us, we are all experienced constructors and never make mistakes when wiring up our shacks. Like many people I run my K3 from a 13.8V DC supply that also supplies other items, in my case XV transverters, an LP100, an LDG ATU etc. This supply is very good (tnx BNOS, 1980s) and only varies by a few 10s of mV between no and full load. Originally when installing my K3/10 I used the supplied DC cable via a powerpole distribution board with an appropriate fuse. In fact this particular board had two fuses, one 30A one at the input and one at the output plus around 1 metre of thick cable to the supply. This worked fine. Later I upgraded to the 100W KPA3, and of course changed the fuse in the distribution board. The DC voltage drop according to the K3 at 20A was over a volt, much no doubt due to the fuses and extra connections through the distribution board. A 1 volt drop is not a problem for the K3 but will cause more IMDs on SSB. I now connect the K3 directly to the PSU with as short a DC cable as is practical. It would be even better to use voltage sensing so the supply is regulated at the K3 end of the cable. Mike ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 soapbox comments from CQ 160 CW ops
There's also this from Nigel G3TXF http://www.g3txf.com/Home/CQWW-160m-Jan-09/CQWW-160m-CW-Jan-09.html He knows a thing or two about pile-ups.. 73, Stewart Rolfe, GW0ETF Bill W4ZV wrote: http://www.eskimo.com/~mwdink/3830/CQWW%20160M%20Soapbox%20Jan%2026%202009.txt In your browser, Edit Find -K3- where the - is a space. I think N5TW's comment is a nice summary: Zero overload products with the K3 and this contest is THE TEST for that! Also note the quality of the folks using the K3...VE3EJ (WRTC 2006 winner), W2VJN (ex owner of Inrad), WA1Z (new claimed SOLP record), K7CA, KT3Y, N6TR, etc. And of course not all K3 users made any comments (e.g. VE7ZO at W8JI). 73, Bill -- View this message in context: http://n2.nabble.com/K3-soapbox-comments-from-CQ-160-CW-ops-tp2221225p2223277.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3/100 and the PSU
As a good engineer I should have stated what I measure with, sorry. Normal 2-tone test, and a HP 8591E spectrum analyzer. Normally I like to do it with speech, i e fully modulate the radio and look at the sample 5 kHz on each side. That is IMO better then a 2-tone test since it will tell you more. And by the way, I did NOT say 2 dB, read below. As an anecdote you can look at this: http://sk3w.se/sm2ekm/view_photo.php?set_albumName=SM2EKM-picturesid=FT_1000D http://sk3w.se/sm2ekm/view_photo.php?set_albumName=SM2EKM-picturesid=KWM_2 We can see that the Collins KWM-2 is ca 10 dB better on adjacent channel compared to Yaesu FT-1000D. The FT-1000D is one of the best modern things around when it´s up to TX IMD. Anything else I have measured is worse then the FT-1000D. Receivers has been getting better but not transmitters that is the bottom line. / Jim SM2EKM - m.j.wil...@rl.ac.uk wrote: I am sure PSU regulation affects all other 12V radios in exactly the same way. The only reason Elecraft users will see it more is because they are more discerning. How do you measure IMDs? 2dB is a worthwhile improvement. It would be interesting to try a better supply cable and also to see if the 20A cutout has any effect. Mike Jan Erik Holm wrote: Yes I´m beginning to think that K3 is more sensitive to PS then other radios, right now it looks that way. Then this should be in the manual!!! What happens is if I have a bad signal on the bands I will together with Elecraft get a bad reputation. I will of course tell everyone what I´m running and do have it operating exactly according to the manual. If this PS deal is the case with the K3 I quite understand and it´s no problem to me what so ever but it should be in the operating manual. Every user of a K3 should not need to be a super engineer and have to figure out things like this them self. This morning I increased PS voltage to 14.6V (14.2) under load, I was at 13.9V (13.5 load) before, I could see a slight improvement in IMD (1-2 dB). I am using the supplied high performance cable from Elecraft and IMO it does not have enough Cu area. Next But if Elecraft supplies it and it´s not good enough, what can I say? / Jim SM2EKM -- AD6XY wrote: Everyone knows it is important for the K3/100 to receive a solid DC supply. If the supply drops significantly when high current is drawn several effects may occur: 1 - The Transmitted signal becomes wider than it should be 2 - The power control loop is upset leading to unstable output power 3 - In severe cases the radio might shut down, or engage sulk mode. Of course this does not apply to us, we are all experienced constructors and never make mistakes when wiring up our shacks. Like many people I run my K3 from a 13.8V DC supply that also supplies other items, in my case XV transverters, an LP100, an LDG ATU etc. This supply is very good (tnx BNOS, 1980s) and only varies by a few 10s of mV between no and full load. Originally when installing my K3/10 I used the supplied DC cable via a powerpole distribution board with an appropriate fuse. In fact this particular board had two fuses, one 30A one at the input and one at the output plus around 1 metre of thick cable to the supply. This worked fine. Later I upgraded to the 100W KPA3, and of course changed the fuse in the distribution board. The DC voltage drop according to the K3 at 20A was over a volt, much no doubt due to the fuses and extra connections through the distribution board. A 1 volt drop is not a problem for the K3 but will cause more IMDs on SSB. I now connect the K3 directly to the PSU with as short a DC cable as is practical. It would be even better to use voltage sensing so the supply is regulated at the K3 end of the cable. Mike ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Amplifier Input Impedance
I would say something slightly different. Firstly I am assuming the PA is on. It might help to measure the input, especially if it is a valve amplifier. If it is solid state the input match is more likely to be RF power dependent, but if the match is really bad at low power it is not likely to get better at high power and such an amplifier would not be linear. A better way would be to measure at the power you intend to use but that requires a directional coupler. It is not ideal but an SWR meter connected with a very short lead would probably do. If the amplifier oscillates then there is a very high chance of damaging the analyzer, but if that were the case, then at least it did not destroy the rig. Make sure the amplifier output has a wideband matched load - definitely NOT an antenna. I don't think a blocking capacitor would be any use unless there is DC on the amplifier input line. If there is, there is probably a problem. Note: You can use an antenna analyser to initially measure matching circuits of a high power valve amplifier, but only when it is off. You need to load the anode with an appropriate impedance equal to the operational anode output load and tune and load for a good match at the output. It will not be spot on but it should be a good starting point. It is very hard to optimise the tank circuit in a valve PA any other way because of the high voltages both DC and RF. It does not tend to work so well with transistors as the impedances are so low and often dominated by the device capacitance. Mike WILLIS COOKE wrote: I would say no to all three questions. The input impedance to the amp will not be the same when it is not powered and driven. The SWR indication on the driver will give you some idea of the input impedance. It should not hurt the antenna analyzer if the amplifier is not powered, but I don't think it will tell you anything useful. With power on the amp, it might. Willis 'Cookie' Cooke K5EWJ -- View this message in context: http://n2.nabble.com/K3-Dual-Receive-Surprise-tp2211092p2223321.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SSB IMD
Jan Erik Holm wrote: As I said before, here I am first time on 20m SSB and people report trash around my signal, i e bad IMD. However at that time I had K3 at 120W, aftter I´ve made measurements and it looks like something slowly starts to happen at 80W. Also I have myself heard K3´s on SSB with trash around the signal however I have also heard K3´s that did NOT have that. So what´s going on here, I´m getting reel puzzled and frankly quite tired of this. This sounds similar to what I was noting on PSK31 when I experimented with higher power levels. However someone else commented the figures I gave were surprisingly high, so I did some more tests and found that on 20m I am getting -34dB PSK IMD right up to 100W output! However the poorer figures which I measured on 30m are repeatable. I'm not sure what to make of this and I am using an amateur PSK meter not a lab grade spectrum analyzer so at this point I am not sure if I can believe the measurements. I am going to see if I can substantiate the results receiving off-air using another receiver and computer. But your comments, my results (and the Eham review causing so much concern in some quarters, which mentioned SSB splatter on 17m) could indicate that there is a variation in PA linearity from band to band that might make some rigs clean on some bands and not on others. Why might this be? I wish there would be a service manual available, like there is for any Japanese rice box. I mean a manual that contains all data for all adjustments. Why not?? It should not really be difficult. After all the K2 was designed to be built from scratch by people with nothing more in the way of test equipment than a DVM and a dummy load. Probably the only adjustable setting is the bias voltage, though I haven't looked at the schematic since it isn't something I personally wish to tinker with. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/New-Eham.net-K3-review-by-QRPNEW-tp2218086p2223443.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SSB IMD
Bill W4ZV wrote: Which reminds me...I set my power supply to deliver 14.5V at the input to my K3 terminals under load. Although the power supply specification says... Supply Voltage/current: 13.8 V nominal during TX. (11 V min, 15 V max). 17-22 Amps typical in TX (100W). 0.9A minimum RX. What is the voltage off-load when it is set like that? ...I would never intentionally run mine at the lower end of that range. If you have any concerns about overshoot when turning on your power supply, always turn the PS on a few seconds before the K3. But the K3 power switch is a soft switch isn't it, so some electronics are still connected to the supply even when the switch is off? I tend to leave my PS on continuously so overshoot is never an issue. Mine consumes 30VA even when no load is present, so for the sake of the environment everything here now gets switched off at the mains when not in use. The supply cable for the K3 certainly uses less copper than the ones supplied with JA radios. The PowerPole connectors seem a bit wimpy to me as well. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/New-Eham.net-K3-review-by-QRPNEW-tp2218086p2223357.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Display voltage?
All this talk about TX IMD and monitoring voltage, etc got me to check out my K3. I usually run @ 50w into small amp and I see 13.7V on rcv and 11.5 while xmit. If I run the power up to 100w, I see 13.7 and 10.8; do I have a problem? I am using an unmetered Astron RS-35 into our standard 220v house supply. 73 Tom CX7TT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SSB IMD
On Jan 27, 2009, at 3:58 AM, Julian, G4ILO wrote: The supply cable for the K3 certainly uses less copper than the ones supplied with JA radios. The PowerPole connectors seem a bit wimpy to me as well. There's nothing wrong with the Anderson connectors. But why not just use heavier cable if that's an issue instead of just sticking with the default that came in the box with the K3? Cable size should be tailored to length anyway, based on standard copper resistance tables and current draw. I really don't know why Elecraft even bothers to supply a cable, except for something to use as a quickie to get power to the radio for testing. Grant/NQ5T ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 - PSK settings
I recommend Fldigi by W1HKJ as currently the best digital modes program - if you don't need all the bells and whistles of HRD. Setting up the power level: Currently you can't rely on the K3 limiting the power output to the level set with the POWER control when data mode is used. Therefore I would suggest you use the following procedure. Connect the rig to a power meter and set the POWER control to some value, say 20W. In the software, click to set the cursor in the center of the passband and then click the Tune button in the software, which should send a pure sine wave not an idling signal. Use the MIC control to adjust LINE IN until the power output on the meter matches the level you set on the POWER control. If LINE IN adjustment is too coarse to set the output power exactly, reduce the audio level from the computer using the mixer sliders. Once this input level has been set, the output power should follow the POWER control fairly accurately. Do not run more than 40W unless you have some means of monitoring the signal to be sure it is not excessively wide and causing interference to other PSK users. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3---PSK-settings-tp341p2223558.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Display voltage?
Tom CX7TT wrote: All this talk about TX IMD and monitoring voltage, etc got me to check out my K3. I usually run @ 50w into small amp and I see 13.7V on rcv and 11.5 while xmit. If I run the power up to 100w, I see 13.7 and 10.8; do I have a problem? I am using an unmetered Astron RS-35 into our standard 220v house supply. I should say so! I suppose you are using the internal voltmeter in the VFO B position? For me it reads 13.9V off-load (DMM reads 13.94V at the PSU output terminals). At 100W key down on 20m, rig draws about 18.5A, voltage drops to 13.5V. This is using a Diamond GSV3000 PSU and the standard weedy K3 power cable, cropped down to the shortest length possible to get from A to B, no more than a couple of feet. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Display-voltage--tp2223487p2223633.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SSB IMD
Bill W4ZV wrote: Which reminds me...I set my power supply to deliver 14.5V at the input to my K3 terminals under load. Although the power supply specification says... Supply Voltage/current: 13.8 V nominal during TX. (11 V min, 15 V max). 17-22 Amps typical in TX (100W). 0.9A minimum RX. What is the voltage off-load when it is set like that? It will depend on: 1. Your specific power supply regulation. 2. The resistance of the connecting cable (i.e. size and length). ***I believe my drop is ~0.3V from 14.8 to 14.5, no-load to load. ...I would never intentionally run mine at the lower end of that range. If you have any concerns about overshoot when turning on your power supply, always turn the PS on a few seconds before the K3. But the K3 power switch is a soft switch isn't it, so some electronics are still connected to the supply even when the switch is off? ***Since the applied voltage is never above the 15.0 spec, I don't worry about it. If you're paranoid, you can disconnect the APP connector each time; or if you're concerned about wearing out the APP connectors, disconnect it at the power supply each time you turn the PS on. I tend to leave my PS on continuously so overshoot is never an issue. ***Mine consumes 30VA even when no load is present, so for the sake of the environment everything here now gets switched off at the mains when not in use. ***My shack is unheated in the winter, so the idle power is heating my shack. :-) The supply cable for the K3 certainly uses less copper than the ones supplied with JA radios. The PowerPole connectors seem a bit wimpy to me as well. ***Nobody is forcing you to use the supplied cable. A battery jumper cable should work nicely if you can figure out the connections. If everyone in the UK is so paranoid, you can probably start a thriving business making special connecting cables ;-) 73, Bill -- View this message in context: http://n2.nabble.com/New-Eham.net-K3-review-by-QRPNEW-tp2218086p2224719.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] New Eham.net K3 review by QRPNEW
Hello OM, When I read the reviews in the eham, I, in fact, deliberately look for the lower end markings. It is up to myself to make my own determination but it is always very interesting in reading those 'odd remarks'. Don't just grossly ignore those comments. Sometimes, they will give you some insights and let you view from other angles. There are areas in K3 which I really don't like though it is still a keeper for me. 73 Johnny Siu VR2XMC K3, K2, IC7800, IC7700, FTDX9k --- 2009年1月27日 星期二，W0MU Mike Fatchett w...@w0mu.com 寫道﹕ 寄件人: W0MU Mike Fatchett w...@w0mu.com 主題: Re: [Elecraft] New Eham.net K3 review by QRPNEW 收件人: a...@cablespeed.com, 'R.Kevin Stover' rksto...@mchsi.com, 'Bruce McLaughlin' bmcla...@bex.net, 'HB9DRV)' si...@hb9drv.ch' 'Simon @mailman.qth.net 副本(CC): elecraft@mailman.qth.net 日期: 2009 1 27 星期二 上午 12:08 I am or was a knob guy. When contesting I liked having knobs that I could turn if I need to do so vs. having to enter into a menu in the heat of a contact or pileup to change something. What I have found with the K3, I just don't feel the need to do anything other than turn the vfo knob or tighten up the roofing filters. I own two FT-2000's and they do look cool and work fine but they don't work as well as the K3. Mike W0MU -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Greg - AB7R Sent: Monday, January 26, 2009 8:21 AM To: 'R.Kevin Stover'; 'Bruce McLaughlin'; HB9DRV)' si...@hb9drv.ch Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] New Eham.net K3 review by QRPNEW Very simply put you know how big a radio is before you buy it. You look at the specs...if its too small for you, get something that isn't. - 73, Greg - AB7R Whidbey Island WA NA-065 On Mon Jan 26 7:17 , Simon \(HB9DRV\) sent: - Original Message - From: R. Kevin Stover rksto...@mchsi.com Any review for a high performance transceiver which starts off complaining about the size of the box and the lack of enough knobs needs to be looked at with a jaundiced eye. Why? It's about usability... I'm colour-blind, have ageing eyes and small hands. For me it's usability, usability, usability, a good receiver and a clean transmitter. Simon Brown, HB9DRV www.ham-radio-deluxe.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com Yahoo!香港提供網上安全攻略，教你如何防範黑客! 請前往 http://hk.promo.yahoo.com/security/ 了解更多!___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] why Elecraft is simply the BEST there is
RE: stopping DVR memories by using PTT and VOX mike input At 1822 on Jan 26, Elecraft DSP guru Lyle said: No, PTT only. Currently, the DVR output for Tx follows the same path in the DSP as any other Tx audio source, so it is already activating VOX. At 2026 on Jan 26, Wayne, the other Elecraft DSP guru and partner in crime said: Actually, Lyle just looked into using VOX to stop the DVR, and he seems to have now implemented it at the DSP. I'll get it into the next MCU revision. WOW! Let me repeat: WOW! de Doug KR2Q ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SSB IMD
I found while assembling my K3 that the crimp connectors that go on the circuit breaker were not crimped well. They pulled out very easily. I replaced them. I go from 14.3 to 13.7 on the front panel voltmeter display at full power out. I see no worse than -31db 3rd imd on my old HP analyzer. It hasn't been cal'd in a while but my other rigs are about the same except my old Ts-830. Of course it's better. I love that rig. But I can't seem to get the cat interface to work. Randy K8RDD Julian, G4ILO wrote: Bill W4ZV wrote: Which reminds me...I set my power supply to deliver 14.5V at the input to my K3 terminals under load. Although the power supply specification says... Supply Voltage/current: 13.8 V nominal during TX. (11 V min, 15 V max). 17-22 Amps typical in TX (100W). 0.9A minimum RX. What is the voltage off-load when it is set like that? It will depend on: 1. Your specific power supply regulation. 2. The resistance of the connecting cable (i.e. size and length). ***I believe my drop is ~0.3V from 14.8 to 14.5, no-load to load. ...I would never intentionally run mine at the lower end of that range. If you have any concerns about overshoot when turning on your power supply, always turn the PS on a few seconds before the K3. But the K3 power switch is a soft switch isn't it, so some electronics are still connected to the supply even when the switch is off? ***Since the applied voltage is never above the 15.0 spec, I don't worry about it. If you're paranoid, you can disconnect the APP connector each time; or if you're concerned about wearing out the APP connectors, disconnect it at the power supply each time you turn the PS on. I tend to leave my PS on continuously so overshoot is never an issue. ***Mine consumes 30VA even when no load is present, so for the sake of the environment everything here now gets switched off at the mains when not in use. ***My shack is unheated in the winter, so the idle power is heating my shack. :-) The supply cable for the K3 certainly uses less copper than the ones supplied with JA radios. The PowerPole connectors seem a bit wimpy to me as well. ***Nobody is forcing you to use the supplied cable. A battery jumper cable should work nicely if you can figure out the connections. If everyone in the UK is so paranoid, you can probably start a thriving business making special connecting cables ;-) 73, Bill -- View this message in context: http://n2.nabble.com/New-Eham.net-K3-review-by-QRPNEW-tp2218086p2225782.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SSB IMD
Bill W4ZV wrote: ***Nobody is forcing you to use the supplied cable. A battery jumper cable should work nicely if you can figure out the connections. If everyone in the UK is so paranoid, you can probably start a thriving business making special connecting cables ;-) We aren't all paranoid in the UK - it's the time difference that makes us grouchy. You people in the USA *always* get to stay up late and it's not fair! -- 73 from Ian GM3SEK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] LP_Bridge and Windows Vista
Adam, I run Vista Home Edition here and it works fine but in the beginning it would not create virtual com ports. I am not sure what I did to make it work but I think it may have been something so simple as to right click the LP Bridge Icon and click run as administrator. I have also created an Administrator sign on and sometimes have to sign on as an Administrator to install programs as an administrator. 73 de KE4WY Jim -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Adam Koczarski Sent: Tuesday, January 27, 2009 2:51 AM To: elecraft@mailman.qth.net Subject: [Elecraft] LP_Bridge and Windows Vista What's the trick to getting LP_Bridge to run with Windows Vista?? I can get it to run and connect to the K3, but I can't get it to create the virtual comm Port for HRD. Cannot create virtual port. TIA Adam - ka7ark ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Display voltage?
I usually run @ 50w into small amp and I see 13.7V on rcv and 11.5 while xmit. If I run the power up to 100w, I see 13.7 and 10.8; do I have a problem? I am using an unmetered Astron RS-35 into our standard 220v house supply. You definitely have a problem, Tom, but it has nothing to do with the power supply you are using. You have excessive resistance somewhere in the DC distribution between the power supply and the K3. Either your cable is using conductors that are too small in diameter, the cable is too long, or you have a loose connection somewhere. First of all, if you have any connections such as a terminal strip or binding post, make sure that they are screwed down tightly. Also check your solder or crimp connections. The K3, like all 100W class rigs, will demand peak currents in the range of 20 amps. Distributing this amount of current without excessive voltage drop takes care. I use an Astron 30A switcher here and have the nice and convenient RigRunner type PowerPole distribution/fusing panels for most of the equipment in the shack. But for the K3 power feed I go directly from the power supply to the K3 with only 3 ft of AWG 10 cable, and only see a couple tenths of a volt change from zero load to 100W CW key down. This is what you should be aiming for if you want maximum performance from the rig. I will take this opportunity to opine further, since this is an important issue for me. Remote sensing is almost always used in industry when delivering this amount of current over distances of two feet or more. It is amazing that the amateur market has not used this simple and effective solution. All it requires is a small twisted pair cable along side the DC cable. I don't even think there are ANY power supplies marketed for amateur use that include remote sensing capability! It would only add a couple dollars to the cost. Thinking in broader terms for the future, we are at or have exceeded the technical capability of a nominal 12V input power system. It is time to think about higher voltages for rigs used in the home environment, perhaps 48V. If there ever is a K4 (never say never, Wayne and Eric ;), please design for 200W with an internal or dedicated eternal Elecraft higher voltage power supply!!! 73 ... Craig AC0DS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 temperature
Tom N0SS said What bothers me, a bit, is that my cooling fans seem to be running a LOT more frequently, and at higher speeds, than they did several firmware versions ago. My FP temperature rose from 18 C to 35 C in a three-hour test yesterday. I don't believe the fans came on but not sure as I can't hear them. When ever I look at them they are not running. The PA temp rose from 17 C to 25 C over the same period. (I may have transmitted a short SSB period, can't remember). So I am wondering at what temperature the fans come on and where that temperature is measured. Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) K3-100 #508/ KX1 #1311 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Display voltage?
Tom, You do have a problem. I recommend that you first check the voltage during transmit at 100 watts at the power supply terminals. If there is more than a few tenths of a volt drop there, you will have a power supply problem - the power supply terminals have connections on the inside as well as the outside and they must be tight and free of corrosion. A few milliohms of resistance at 18 amps will create a significant voltage drop. Next thing to investigate is the power cord and its terminating connections. The APP connectors are quite good as long as the crimp to the wire is tight enough to be what is considered 'gas-tight' If there are any doubts about the quality of the crimp, solder the connectors. Whatever termination you use on the power supply end is suspect too, the same criteria should be applied as for the APP connectors - good crimps or solder if there is any doubt. Be certain the power cord is tight on the power supply output terminal bolts. Lastly, if the power cord is much longer than it has to be, shorten it, every inch of wire has some resistance. If you need to use a long length, consider using #10 wire instead of the #12 supplied by Elecraft. Don;t get me wrong, #12 is entirely adequate if all other conditions are good, but 5 feet of #12 does have 8.1 milliohms resistance, but the return path also adds to the voltage drop, so the entire resistance is 16.2 milliohms which translates to 0.3 volts drop at 18 amps due to the copper. The drop using #10 wire will be about 2/3 of that seen with #12. From all that, you should conclude that the most significant voltage drop from light load to 18 amps load will be in the connections, but about 0.3 volts will be contributed by the wire. 73, Don W3FPR TMorton wrote: All this talk about TX IMD and monitoring voltage, etc got me to check out my K3. I usually run @ 50w into small amp and I see 13.7V on rcv and 11.5 while xmit. If I run the power up to 100w, I see 13.7 and 10.8; do I have a problem? I am using an unmetered Astron RS-35 into our standard 220v house supply. 73 Tom CX7TT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.14/1918 - Release Date: 1/27/2009 7:26 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Display voltage?
Craig D. Smith wrote: Thinking in broader terms for the future, we are at or have exceeded the technical capability of a nominal 12V input power system. It is time to think about higher voltages for rigs used in the home environment, perhaps 48V. If there ever is a K4 (never say never, Wayne and Eric ;), please design for 200W with an internal or dedicated eternal Elecraft higher voltage power supply!!! The K3 was designed with portability in mind, hence the decision to make it a 12V radio. However I guess that many (if not most) of them have never moved from the owner's shack. Since the K3 PA is a separate module that could have separate power connectors on the rear panel, couldn't someone make a higher voltage version as a drop-in replacement? I guess the lack of a commercially available power supply would deter many potential buyers, but I'm sure I recall mention of a matching K3 power supply being offered some time back, so perhaps this could be one of its options. It's be quicker than waiting for a K4. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Display-voltage--tp2223487p2226064.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Locked VFO on 40 Meters
I changed the RATES setting while on 40 meters from 3R to 3C and now the VFO is locked at 7100.00. I have cycled through the Rate/Lock switch several times and the VFO is not locked from there, it is displaying nor. I have changed RATES back to 3R but no help, VFO stays at 7100.00 while turning the VFO knob. All other bands operate normally. Solutions or Suggestions please! Thank you in advance Tom WUY #6615 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] SHIFT pitch
I have three 8 pole filters installed, 2.8, 1.8, and .4 kHz. As I rotate the WIDTH knob, the filters switch in and out at their transition frequencies (as they should). But when that switch occurs, the background noise pitch frequency seems to jump to a different SHIFT frequency setting. In other words, the transition between filters is not smooth. I am wondering if all K3's with 8 pole filters do the same thing as mine? My filter offsets are all set to zero, as that is what I am told the 8 pole filters offsets should be. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Locked VFO on 40 Meters K2
Problem solved: While in the RATES menu I apparently had changed the type of scanning to something other than normal by tapping the DISPLAY switch. When I returned the type of scan back to scn nor the problem was solved. Operator error. Thanks to the K2 Nifty Mini Manual for the information. 73 To All Tom WUY == Tom Lappin WUY wrote: I changed the RATES setting while on 40 meters from 3R to 3C and now the VFO is locked at 7100.00. I have cycled through the Rate/Lock switch several times and the VFO is not locked from there, it is displaying nor. I have changed RATES back to 3R but no help, VFO stays at 7100.00 while turning the VFO knob. All other bands operate normally. Solutions or Suggestions please! Thank you in advance Tom WUY #6615 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Beta rev. 02.80, DVR operation
I installed MCU rev 02.80; FPF 00.02; DSP 1 2, 01.99; DVR ver 01.03. During the pause of a repeating message, the DVR does not drop out of repeat when I hit my PTT foot-pedal to transmit. I have a 10sec pause selected in repeat mode. If I transmit and then listen during the pause, the message continues to repeat after the 10sec pause has elapsed. If I hit the PTT foot-pedal during playback/transmit, it stops as it should. Does it work this way for anyone else? Thanks, Bob -- View this message in context: http://n2.nabble.com/K3-Beta-rev.-02.80%2C-DVR-operation-tp2226542p2226542.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Amplifier Input Impedance
Thanks to all who have replied. The amplifier that I have in mind is an old Dentron GLA-1000B that I am restoring. It is a grounded grid sweep tube amplifier and uses fixed pi networks (a different network for each band, selected by the band switch) at the input. It is supposed to have a better than 2:1 SWR at input. Back in the day, I used to run it with a Kenwood T-599D transmitter whose output tank circuit was a wide range pi network, and there never was a problem coupling the transmitter energy into the amplifier. However, my K2 is much touchier about the range of loads it will tolerate. As the amp is not yet restored, I have not yet tried running it with the K2. Thus, maybe I'll have a problem and maybe I won't. I did notice that at least one poster to the list has had a problem the SWR seen by a K2 looking into a cheap tube type amplifier. Thus, I'm thinking what I might do if I run into the problem. If I do have an SWR problem, I see three possible solutions: 1) (If even possible) Change the values of the mica capacitors in the amplifier input circuits to obtain a better match in the relatively narrow CW segments in which I operate. 2) Insert an attenuator between the K2 and the amp. A 2 dB attenuator would knock down a 2:1 SWR to 1.53:1. The down side is that I'd probably need to construct the attenuator from thin film resistors. The other down side is that I'd be contributing about 35 Watts to the Heat Death of the Universe. The 63 watts (or so) coming out of the generator is adequate drive for the amp to give me 400 Watts out. The up side is that there is no tuning. 3) Insert a tuner (which do have on hand) between the K2 and the amp. This is the cheapest solution, but it makes band changing take many steps. Regarding AD6XY's precautions: 1) This is a valve amplifier and not solid state. 2) I've never had a problem with amplifier oscillation in the past. It is a grounded grid configuration and relatively low gain. It is not impossible that it will oscillate, but it is less vulnerable than other designs. 3) I have a very high quality KW dummy load for sush purposes as adjusting amplifiers. Thanks agasin 73, Steve AA4AK AD6XY wrote: I would say something slightly different. Firstly I am assuming the PA is on. It might help to measure the input, especially if it is a valve amplifier. If it is solid state the input match is more likely to be RF power dependent, but if the match is really bad at low power it is not likely to get better at high power and such an amplifier would not be linear. A better way would be to measure at the power you intend to use but that requires a directional coupler. It is not ideal but an SWR meter connected with a very short lead would probably do. If the amplifier oscillates then there is a very high chance of damaging the analyzer, but if that were the case, then at least it did not destroy the rig. Make sure the amplifier output has a wideband matched load - definitely NOT an antenna. I don't think a blocking capacitor would be any use unless there is DC on the amplifier input line. If there is, there is probably a problem. Note: You can use an antenna analyser to initially measure matching circuits of a high power valve amplifier, but only when it is off. You need to load the anode with an appropriate impedance equal to the operational anode output load and tune and load for a good match at the output. It will not be spot on but it should be a good starting point. It is very hard to optimise the tank circuit in a valve PA any other way because of the high voltages both DC and RF. It does not tend to work so well with transistors as the impedances are so low and often dominated by the device capacitance. Mike WILLIS COOKE wrote: I would say no to all three questions. The input impedance to the amp will not be the same when it is not powered and driven. The SWR indication on the driver will give you some idea of the input impedance. It should not hurt the antenna analyzer if the amplifier is not powered, but I don't think it will tell you anything useful. With power on the amp, it might. Willis 'Cookie' Cooke K5EWJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SHIFT pitch
I suspect that the filter gain rather than the width is the major cause of that behavior. Try working with the FLx GN setting in the CONFIG menu to see if you can obtain a smoother transition. You could expect the widest filter to have the smallest loss, so start with the transition between FL1 and FL2 and when that seems right, move on to the FL2 and FL2 transition, etc. The easiest way to do this is with a broadband noise generator (such as the Elecraft NGen) so you have a constant input to the K3 and it would be easy to evaluate the audio level using Spectrogram or some other audio spectrum analyzer, although a AC DMM connected across the speaker would give decent results. Once you have the filter gains equalized, you can easily change the filter offsets if necessary. While the 8 pole filter offsets are close to zero, it is not practical to expect that they are all exactly zero. 73, Don W3FPR W5UN wrote: I have three 8 pole filters installed, 2.8, 1.8, and .4 kHz. As I rotate the WIDTH knob, the filters switch in and out at their transition frequencies (as they should). But when that switch occurs, the background noise pitch frequency seems to jump to a different SHIFT frequency setting. In other words, the transition between filters is not smooth. I am wondering if all K3's with 8 pole filters do the same thing as mine? My filter offsets are all set to zero, as that is what I am told the 8 pole filters offsets should be. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] SSB power out
Hi all, If the K3 has significantly worse IMD over 100W on SSB and we are told by Elecraft that it does, then why does the radio allow us to turn it up to 120W? In CW, I guess the linearity is no so important so 120W should be fine but for data and SSB where it matters, surely the software can limit it? Why not only allow 100W in SSB mode? 73 Ian -- Ian J Maude, G0VGS SysOp GB7MBC DX Cluster Member RSGB, GQRP, FISTS K2 #4044 |K3 #455 http://www.amateurradiotraining.org ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Beta rev. 02.80, DVR operation
I verified this last night and Wayne is aware of it. Thanks for the report! - 73, Greg - AB7R Whidbey Island WA NA-065 On Tue Jan 27 8:02 , Bob W9RFS sent: I installed MCU rev 02.80; FPF 00.02; DSP 1 2, 01.99; DVR ver 01.03. During the pause of a repeating message, the DVR does not drop out of repeat when I hit my PTT foot-pedal to transmit. I have a 10sec pause selected in repeat mode. If I transmit and then listen during the pause, the message continues to repeat after the 10sec pause has elapsed. If I hit the PTT foot-pedal during playback/transmit, it stops as it should. Does it work this way for anyone else? Thanks, Bob -- View this message in context: http://n2.nabble.com/K3-Beta-rev.-02.80%2C-DVR- operation-tp2226542p2226542.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3/100 and the PSU
I used the included power cable and did notice a drop in the voltage of about a volt. I had bought a 35 amp, 25 amp continuous Astron power supply which has variable voltage but does not include a remote probe as the one I made from the ARRL handbook offered. The probe was used to ID voltage drop and the PS responded by upping the voltage as needed so 13.8 would be at the rig at all times. Using that probe with my old TR7 kept the voltage dead on at the rig. I was saddened to have left that in Indiana as a gift to a friend for the PS components were made from an old Wang computer I canabalized in the 80's and I designed it for an easy 80 amps and it weighed over 100 pounds and was on casters. It was too much to move and is in use today by my friend but I digress; I felt the best option with the K3 and the Astron VS35M was to use a different power cable so I cut the cable aproximately 5 from the Power Pole and soldered that short end to an 8 gauge cable made of very fine wire which I bought from Home Depot. This was part of heavy cable at about $5/foot with four conductors and a heavy neoprene outer jacket. I stripped the jacket, used two of the connectors and attached a 4' length to the Astron k3. From the K3 internal volt meter it reads: 14.0V at idle: At 25W the drop is .2 = 13.8 At 50W the drop is .3 = 13.7 At 75W the drop is .3 = 13.7 At 100W the drop is .4 = 13.6 at 120W the drop is .4 = 13.6 Not as regulated at the rig as my old homebrew PS but certainly a very little voltage drop. When running the amp I never use more than 50W drive so I'm content. One caveat is I felt the need to devise a mount to keep the power cord from moving around behind the radio. I know the PowerPoles are loved by many but I see these smaller variety as a weak point and don't much like them attached to the rig. The old TenTec attachments were not as sexy as these PowerPoles but I felt they had more heft and I didn't feel concern that someday the internal soldering would come loose from repeated motion as the rig is located from one site to another. Perhaps if the next larger size of PowerPole were utilized I would feel it more sturdy? 73, GAry KA1J ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] LP_Bridge and Windows Vista
-Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft- boun...@mailman.qth.net] On Behalf Of Jim Sent: Tuesday, January 27, 2009 5:54 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] LP_Bridge and Windows Vista Adam, I run Vista Home Edition here and it works fine but in the beginning it would not create virtual com ports. Finally got it to work later last night. I had already tried the 'run as admin' without success. I had just upgraded this system from XP to Vista, then to Vista SP-1. Doing a reinstallation of LP_Bridge did the trick. Must be a driver permission thing that doesn't make it through the upgrade process. The LP-Pan and the associated software works as designed, as does HRD. I've been experimenting with Windows 7 on another laptop here and thought it would be fun to try and test out the K3 tools on that OS. You can only upgrade to Windows 7 from Vista at this point in the BETA, thus last night's upgrade from XP to VISTA on the radio laptop. I'll give Windows 7 a shot tonight and see what happens. Anyone try this yet? With my week of experience with Windows 7 it seeming to be more like Vista SP-2 than a new product. That would explain the amazing stability reports for a Microsoft BETA OS. :) Seems like more of a marketing rebranding of Vista than a newly developed OS. I guess the Bill Gates-Jerry Seinfeld commercials just weren't doing the trick. ;) It is much faster/leaner feeling than Vista, with a few GUI changes and it comes bundled with IE 8 BETA. The IE 8 BETA definitely feels like a BETA. Some tests I've read even claim it's faster than XP! I'll keep my fingers crossed and report back what I find. Adam - ka7ark ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Beta rev. 02.80, DVR operation
I installed MCU rev 02.80; FPF 00.02; DSP 1 2, 01.99; DVR ver 01.03. During the pause of a repeating message, the DVR does not drop out of repeat when I hit my PTT foot-pedal to transmit... The fix for this is on the list. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Amplifier Input Impedance
Steve, The KPA100 will tolerate a 2:1 SWR with no problem. That is not uncommon with solid state amps. If you do have a HI SWR problem with the input circuit, it would likely indicate a defective component in the input circuit (most likely a capacitor). My GLA1000 is not up and running either so I can't give you any 'tried and true' data. 73, Don W3FPR Stephen W. Kercel wrote: Thanks to all who have replied. The amplifier that I have in mind is an old Dentron GLA-1000B that I am restoring. It is a grounded grid sweep tube amplifier and uses fixed pi networks (a different network for each band, selected by the band switch) at the input. It is supposed to have a better than 2:1 SWR at input. Back in the day, I used to run it with a Kenwood T-599D transmitter whose output tank circuit was a wide range pi network, and there never was a problem coupling the transmitter energy into the amplifier. However, my K2 is much touchier about the range of loads it will tolerate. As the amp is not yet restored, I have not yet tried running it with the K2. Thus, maybe I'll have a problem and maybe I won't. I did notice that at least one poster to the list has had a problem the SWR seen by a K2 looking into a cheap tube type amplifier. Thus, I'm thinking what I might do if I run into the problem. If I do have an SWR problem, I see three possible solutions: 1) (If even possible) Change the values of the mica capacitors in the amplifier input circuits to obtain a better match in the relatively narrow CW segments in which I operate. 2) Insert an attenuator between the K2 and the amp. A 2 dB attenuator would knock down a 2:1 SWR to 1.53:1. The down side is that I'd probably need to construct the attenuator from thin film resistors. The other down side is that I'd be contributing about 35 Watts to the Heat Death of the Universe. The 63 watts (or so) coming out of the generator is adequate drive for the amp to give me 400 Watts out. The up side is that there is no tuning. 3) Insert a tuner (which do have on hand) between the K2 and the amp. This is the cheapest solution, but it makes band changing take many steps. Regarding AD6XY's precautions: 1) This is a valve amplifier and not solid state. 2) I've never had a problem with amplifier oscillation in the past. It is a grounded grid configuration and relatively low gain. It is not impossible that it will oscillate, but it is less vulnerable than other designs. 3) I have a very high quality KW dummy load for sush purposes as adjusting amplifiers. Thanks agasin 73, Steve AA4AK AD6XY wrote: I would say something slightly different. Firstly I am assuming the PA is on. It might help to measure the input, especially if it is a valve amplifier. If it is solid state the input match is more likely to be RF power dependent, but if the match is really bad at low power it is not likely to get better at high power and such an amplifier would not be linear. A better way would be to measure at the power you intend to use but that requires a directional coupler. It is not ideal but an SWR meter connected with a very short lead would probably do. If the amplifier oscillates then there is a very high chance of damaging the analyzer, but if that were the case, then at least it did not destroy the rig. Make sure the amplifier output has a wideband matched load - definitely NOT an antenna. I don't think a blocking capacitor would be any use unless there is DC on the amplifier input line. If there is, there is probably a problem. Note: You can use an antenna analyser to initially measure matching circuits of a high power valve amplifier, but only when it is off. You need to load the anode with an appropriate impedance equal to the operational anode output load and tune and load for a good match at the output. It will not be spot on but it should be a good starting point. It is very hard to optimise the tank circuit in a valve PA any other way because of the high voltages both DC and RF. It does not tend to work so well with transistors as the impedances are so low and often dominated by the device capacitance. Mike WILLIS COOKE wrote: I would say no to all three questions. The input impedance to the amp will not be the same when it is not powered and driven. The SWR indication on the driver will give you some idea of the input impedance. It should not hurt the antenna analyzer if the amplifier is not powered, but I don't think it will tell you anything useful. With power on the amp, it might. Willis 'Cookie' Cooke K5EWJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm
Re: [Elecraft] K3 temperature
The fans only come on in response to the PA temp sensor. In a future release they'll also come on if the FP temperature is excessive. But so far, I haven't seen any reports of excessive FP temperature -- they're all in the acceptable range. 73, Wayne N6KR On Jan 27, 2009, at 6:21 AM, Mike Scott wrote: My FP temperature rose from 18 C to 35 C in a three-hour test yesterday. --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 temperature
Hi, I'd like to suggest that Enhancements and App notes be assigned numbers, so they'll be easier to keep track of. 73, doug ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3/100 and the PSU
The old TenTec attachments were not as sexy as these PowerPoles but I felt they had more heft and I didn't feel concern that someday the internal soldering would come loose from repeated motion as the rig is located from one site to another. Interesting. At least on the newer T-T rigs, the power connectors have been a source of loud and continuous gnashing of teeth for many. If one uses the proper crimp tool on the PowerPoles AND flows solder into the crimped joint (sort of like wearing both a belt and suspenders), nothing much should come loose with a whole lot of wiggling about. I don't have a love affair with Anderson connectors, but I use them on all the DC distribution in my station, and have yet to have any sort of problem. Perhaps we could convince Elecraft to put big split bolts on the radio for power connections. That would also have the side effect of requiring a larger cabinet with space for more knobs, which would please a lot of folks, too :-) Grant/NQ5T ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 temperature
That's interesting. I would think that the PA shielding and top venting would make the fans pretty ineffective for cooling the FP. Or is the idea that if the FP is too warm, the PA is probably too warm as well, regardless of the reported PA temp? 73 -- Joe KB8AP On Jan 27, 2009, at 8:39 AM, wayne burdick wrote: The fans only come on in response to the PA temp sensor. In a future release they'll also come on if the FP temperature is excessive. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Numbering of Enhancements and App Notes
Doug: I suggested this to Gary a number of weeks ago and he said he would pass it along. 73 Doug, VE3MV - Original Message - From: Doug Faunt N6TQS +1-510-655-8604 fa...@panix.com To: Elecraft@mailman.qth.net Sent: Tuesday, January 27, 2009 11:44 AM Subject: Re: [Elecraft] K3 temperature Hi, I'd like to suggest that Enhancements and App notes be assigned numbers, so they'll be easier to keep track of. 73, doug ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- I am using the free version of SPAMfighter. We are a community of 5.9 million users fighting spam. SPAMfighter has removed 1012 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 temperature
Speaking of temperature - A week or two ago I complained about the fans continuously speeding up and slowing down during a contest. Since then I have set the fans to run continuously at low speed (config kpa3=fn1). The fans are almost inaudible at this speed, and I didn't hear them cycling up and down during the 160 cw or bartg sprint contests. The rigs were running only 50 watts though, driving high gain amps. The NAQP RTTY contest is coming up on Feb 28. That's a 100w RTTY contest. The rigs will get a workout there. I'll keep an eye on pa temp and fan speed. I did verify that with kpa3=fn1, the fans do speed up if pa temp rises. Dave Hachadorian, K6LL Yuma, AZ - Original Message - From: wayne burdick n...@elecraft.com To: m...@paxsen.com Cc: Elecraft@mailman.qth.net Sent: Tuesday, January 27, 2009 4:39 PM Subject: Re: [Elecraft] K3 temperature The fans only come on in response to the PA temp sensor. In a future release they'll also come on if the FP temperature is excessive. But so far, I haven't seen any reports of excessive FP temperature -- they're all in the acceptable range. 73, Wayne N6KR On Jan 27, 2009, at 6:21 AM, Mike Scott wrote: My FP temperature rose from 18 C to 35 C in a three-hour test yesterday. --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] why Elecraft is simply the BEST there is
I second that!! Jay(K2TTT) -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of DOUGLAS ZWIEBEL Sent: Tuesday, January 27, 2009 7:38 AM To: Elecraft Reflector Subject: [Elecraft] why Elecraft is simply the BEST there is RE: stopping DVR memories by using PTT and VOX mike input At 1822 on Jan 26, Elecraft DSP guru Lyle said: No, PTT only. Currently, the DVR output for Tx follows the same path in the DSP as any other Tx audio source, so it is already activating VOX. At 2026 on Jan 26, Wayne, the other Elecraft DSP guru and partner in crime said: Actually, Lyle just looked into using VOX to stop the DVR, and he seems to have now implemented it at the DSP. I'll get it into the next MCU revision. WOW! Let me repeat: WOW! de Doug KR2Q ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3/100 and the PSU
Gary You could wire the power cable direct to the pcb inside the K3, that would further reduce your losses and avoid connector damage/intermittence if it's being wiggled a lot. David G3UNA - Original Message - From: Gary Smith g...@doctorgary.net To: Elecraft@mailman.qth.net Sent: Tuesday, January 27, 2009 4:14 PM Subject: Re: [Elecraft] K3/100 and the PSU I used the included power cable and did notice a drop in the voltage of about a volt. I had bought a 35 amp, 25 amp continuous Astron power supply which has variable voltage but does not include a remote probe as the one I made from the ARRL handbook offered. The probe was used to ID voltage drop and the PS responded by upping the voltage as needed so 13.8 would be at the rig at all times. Using that probe with my old TR7 kept the voltage dead on at the rig. I was saddened to have left that in Indiana as a gift to a friend for the PS components were made from an old Wang computer I canabalized in the 80's and I designed it for an easy 80 amps and it weighed over 100 pounds and was on casters. It was too much to move and is in use today by my friend but I digress; I felt the best option with the K3 and the Astron VS35M was to use a different power cable so I cut the cable aproximately 5 from the Power Pole and soldered that short end to an 8 gauge cable made of very fine wire which I bought from Home Depot. This was part of heavy cable at about $5/foot with four conductors and a heavy neoprene outer jacket. I stripped the jacket, used two of the connectors and attached a 4' length to the Astron k3. From the K3 internal volt meter it reads: 14.0V at idle: At 25W the drop is .2 = 13.8 At 50W the drop is .3 = 13.7 At 75W the drop is .3 = 13.7 At 100W the drop is .4 = 13.6 at 120W the drop is .4 = 13.6 Not as regulated at the rig as my old homebrew PS but certainly a very little voltage drop. When running the amp I never use more than 50W drive so I'm content. One caveat is I felt the need to devise a mount to keep the power cord from moving around behind the radio. I know the PowerPoles are loved by many but I see these smaller variety as a weak point and don't much like them attached to the rig. The old TenTec attachments were not as sexy as these PowerPoles but I felt they had more heft and I didn't feel concern that someday the internal soldering would come loose from repeated motion as the rig is located from one site to another. Perhaps if the next larger size of PowerPole were utilized I would feel it more sturdy? 73, GAry KA1J ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Amplifier Input Impedance
Steve, It sounds like you have a good handle on all of the issues. I have the same problem with my old Swan 1200X sweep tube amp that I have used with my K2 and with my current K3. This amp has no input matching networks at all! I also have an old SB200 Heathkit amp that does have input L-network matching networks. I found that the SB200 worked fine with the K2 at reasonable (around 1.5 to 1) SWR although I only used it on 80 and 40 meters. I'm sure that I could have easily tweaked the input networks on the SB200 for improved SWR if I had needed to do so but I so seldom used it that I never felt it was necessary. With my Swan, though, the solid state radios would not drive the amp at all. I used an antenna tuner in between the K2 and the amp for a while but eventually modified the Swan to add small input matching networks built up from small ferrite toroids and mica capacitors switched by a rotary switch on the front panel of the amp. It was a fairly simple matter to find the correct values by cut and try. With your amp, which already has switched input networks, it should be a fairly simple matter to tweak the existing networks to get a very low SWR. I don't think you will have a big problem getting it to work the way you like. Don K7FJ Thanks to all who have replied. The amplifier that I have in mind is an old Dentron GLA-1000B that I am restoring. It is a grounded grid sweep tube amplifier and uses fixed pi networks (a different network for each band, selected by the band switch) at the input. It is supposed to have a better than 2:1 SWR at input. Back in the day, I used to run it with a Kenwood T-599D transmitter whose output tank circuit was a wide range pi network, and there never was a problem coupling the transmitter energy into the amplifier. However, my K2 is much touchier about the range of loads it will tolerate. As the amp is not yet restored, I have not yet tried running it with the K2. Thus, maybe I'll have a problem and maybe I won't. I did notice that at least one poster to the list has had a problem the SWR seen by a K2 looking into a cheap tube type amplifier. Thus, I'm thinking what I might do if I run into the problem. If I do have an SWR problem, I see three possible solutions: 1) (If even possible) Change the values of the mica capacitors in the amplifier input circuits to obtain a better match in the relatively narrow CW segments in which I operate. 2) Insert an attenuator between the K2 and the amp. A 2 dB attenuator would knock down a 2:1 SWR to 1.53:1. The down side is that I'd probably need to construct the attenuator from thin film resistors. The other down side is that I'd be contributing about 35 Watts to the Heat Death of the Universe. The 63 watts (or so) coming out of the generator is adequate drive for the amp to give me 400 Watts out. The up side is that there is no tuning. 3) Insert a tuner (which do have on hand) between the K2 and the amp. This is the cheapest solution, but it makes band changing take many steps. Regarding AD6XY's precautions: 1) This is a valve amplifier and not solid state. 2) I've never had a problem with amplifier oscillation in the past. It is a grounded grid configuration and relatively low gain. It is not impossible that it will oscillate, but it is less vulnerable than other designs. 3) I have a very high quality KW dummy load for sush purposes as adjusting amplifiers. Thanks agasin 73, Steve AA4AK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SSB IMD
Is there something critical in the radio that gives this outcome? Critical adjustment perhaps? Is it very sensitive what PS we use (ala W4ZV)? Yes, it is very sensitive to power supply voltage. Look at any of the application notes - the one Craig mentions for the P-P RD100HHF FETs is a good example. Decreasing Vcc (or Vdd) by just one Volt will increase the IMD at 100 Watts by 10 dB and decrease the maximum output power by almost 20 Watts. Running the power supply at 14.0 - 14.5 Volts and using a power supply with good dynamic regulation will go a long way to keeping the K3 clean. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jan Erik Holm Sent: Tuesday, January 27, 2009 1:54 AM Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] SSB IMD Yes I´ve seen those figures, there are are lot of data from component manufactures however by the time we see the finished product data doesn´t even come close. I tried to look for the data on the FT-990 that K6LL informed about but couldn´t find it. I was thinking what reference level they used, I think I remember ARRL changed their procedure, the -38 prity well could be -32 in real life. However, something struck me, why is it we see this big variation in data on the IMD3? We have a spread between -38 to -24 dB. A number of people has measured below -30 dB and as far as I know only one around -38 dB. Who is right and who is wrong? Is there something critical in the radio that gives this outcome? Critical adjustment perhaps? Is it very sensitive what PS we use (ala W4ZV)? As I said before, here I am first time on 20m SSB and people report trash around my signal, i e bad IMD. However at that time I had K3 at 120W, aftter I´ve made measurements and it looks like something slowly starts to happen at 80W. Also I have myself heard K3´s on SSB with trash around the signal however I have also heard K3´s that did NOT have that. So what´s going on here, I´m getting reel puzzled and frankly quite tired of this. I wish there would be a service manual available, like there is for any Japanese rice box. I mean a manual that contains all data for all adjustments. Why not?? / Jim SM2EKM --- Joe Subich, W4TV wrote: Jan Erik Holm wrote: Bill and others, hold on and think about these figures. -35 to -38 dB IM3 !! We are dealing with 2SC2782 transistors operating at around 12V DC. I say no more, the knowledge and intelligent individual will understand. I would be careful here ... the Toshiba 2SC2879 data sheet clearly does -38dB IMD at 60 watts with VCC=12.5V. There are certainly devices capable of that level of performance means that there are devices capable of that level just as there are devices capable of similar levels of performance at 120-140 watts per device with Vcc=28V. I would expect the 2SC2879 to also be capable of this level of performance ... if not, I would have expected the design of the KPA3 to have been based on another device. 73, ... Joe, W4TV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SSB IMD
This is possible, but, as far as I know, it is untested. I've read several anecdotes claiming poor SSB performance, and several others claiming excellent SSB performance. What's needed is for someone to take one of the poor K3's, and change some factor that turns it into an excellent K3. Such as, plug it into a better power supply, and show that one power supply consistently produces good results and another consistently produces bad results. I predict that the power supply claim will turn out to be bogus. The K2 has voltage regulators all through it, and runs well down to -- is it 10 volts? The K3 needs a bit more oomph, but I'll bet Wayne designed it to be robust, too. I further predict that the bad SSB performance will turn out to be either an adjustment issue, or an external amplifier issue. I'd love to see some experiments. Peter N8MHD On 1/27/09, Joe Subich, W4TV li...@subich.com wrote: Is there something critical in the radio that gives this outcome? Critical adjustment perhaps? Is it very sensitive what PS we use (ala W4ZV)? Yes, it is very sensitive to power supply voltage. Look at any of the application notes - the one Craig mentions for the P-P RD100HHF FETs is a good example. Decreasing Vcc (or Vdd) by just one Volt will increase the IMD at 100 Watts by 10 dB and decrease the maximum output power by almost 20 Watts. Running the power supply at 14.0 - 14.5 Volts and using a power supply with good dynamic regulation will go a long way to keeping the K3 clean. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jan Erik Holm Sent: Tuesday, January 27, 2009 1:54 AM Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] SSB IMD Yes I´ve seen those figures, there are are lot of data from component manufactures however by the time we see the finished product data doesn´t even come close. I tried to look for the data on the FT-990 that K6LL informed about but couldn´t find it. I was thinking what reference level they used, I think I remember ARRL changed their procedure, the -38 prity well could be -32 in real life. However, something struck me, why is it we see this big variation in data on the IMD3? We have a spread between -38 to -24 dB. A number of people has measured below -30 dB and as far as I know only one around -38 dB. Who is right and who is wrong? Is there something critical in the radio that gives this outcome? Critical adjustment perhaps? Is it very sensitive what PS we use (ala W4ZV)? As I said before, here I am first time on 20m SSB and people report trash around my signal, i e bad IMD. However at that time I had K3 at 120W, aftter I´ve made measurements and it looks like something slowly starts to happen at 80W. Also I have myself heard K3´s on SSB with trash around the signal however I have also heard K3´s that did NOT have that. So what´s going on here, I´m getting reel puzzled and frankly quite tired of this. I wish there would be a service manual available, like there is for any Japanese rice box. I mean a manual that contains all data for all adjustments. Why not?? / Jim SM2EKM --- Joe Subich, W4TV wrote: Jan Erik Holm wrote: Bill and others, hold on and think about these figures. -35 to -38 dB IM3 !! We are dealing with 2SC2782 transistors operating at around 12V DC. I say no more, the knowledge and intelligent individual will understand. I would be careful here ... the Toshiba 2SC2879 data sheet clearly does -38dB IMD at 60 watts with VCC=12.5V. There are certainly devices capable of that level of performance means that there are devices capable of that level just as there are devices capable of similar levels of performance at 120-140 watts per device with Vcc=28V. I would expect the 2SC2879 to also be capable of this level of performance ... if not, I would have expected the design of the KPA3 to have been based on another device. 73, ... Joe, W4TV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Tuning aid on digi mode
Hello All , After downloading the new FW 2.80 I attempted to use the tuning aid (CWT) to zero beat a digi signal ( JT65A ) on 14076 + 200hz or 14076.2 The VFO tuned to 14075.8 or 200hz the wrong Direction . Maybe the FW needs to look at the side band that is selected for that digi mode , most digi modes are upper side band. TU 73 Ken K5DNL ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3/100 and the PSU (and Power Pole Repair)
I recently used a heavy guage cable (#8 stranded, I believe) between the K3 and PS in a portable operation. The extra stiffness of the cable caused a strain that fractured the plastic shell on the positive Power Pole connector in the K3. So, I agree that some sort of strain relief is in order if larger/stiffer cable is used. Perhaps the pig-tail mention earlier is a reasonable approach. Fortunately, I was able to replace the Power Pole plastic shells without disassembling the K3. It required: 1) removing both the positive and negative shells using a small tool to lift the metal connector blades inside, 2) mating a new pair of connector, 3) scraping off a small protusion on the positive connector to allow the assembly to fit in the rear panel opening, and 4) sliding the assembly over the connector blades. Perhaps this will help if someone else encounters this problem. Chuck, AE4CW Grant Youngman wrote: The old TenTec attachments were not as sexy as these PowerPoles but I felt they had more heft and I didn't feel concern that someday the internal soldering would come loose from repeated motion as the rig is located from one site to another. Interesting. At least on the newer T-T rigs, the power connectors have been a source of loud and continuous gnashing of teeth for many. If one uses the proper crimp tool on the PowerPoles AND flows solder into the crimped joint (sort of like wearing both a belt and suspenders), nothing much should come loose with a whole lot of wiggling about. I don't have a love affair with Anderson connectors, but I use them on all the DC distribution in my station, and have yet to have any sort of problem. Perhaps we could convince Elecraft to put big split bolts on the radio for power connections. That would also have the side effect of requiring a larger cabinet with space for more knobs, which would please a lot of folks, too :-) Grant/NQ5T ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- View this message in context: http://n2.nabble.com/K3-100-and-the-PSU-tp2223048p2227563.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] [Fwd: Re: SHIFT pitch]
Hi everyone, Lyle reminded me that the K3's built-in AF voltmeter display can be used as a reliable indicator of audio amplitude - it is a true RMS reading indication. He also indicated that a steady carrier can easily be used rather than the wideband noise source. If you use an on-the-air signal, be careful not to confuse amplitude changes caused by the filter with QSB on the signal. A QRP transmitter feeding a dummy load would probably serve as a steady source of carrier if you do not have a signal generator available. There are several ways to do a relative gain evaluation, and I mentioned only the way I am more used to using - I just didn't think of the others initially. 73, Don W3FPR Original Message Subject:Re: [Elecraft] SHIFT pitch Date: Tue, 27 Jan 2009 11:06:20 -0500 From: Don Wilhelm w3...@embarqmail.com Reply-To: d...@w3fpr.com To: W5UN w...@wt.net CC: elecraft@mailman.qth.net References: 20090127073502.f72f4...@dm0205.mta.everyone.net I suspect that the filter gain rather than the width is the major cause of that behavior. Try working with the FLx GN setting in the CONFIG menu to see if you can obtain a smoother transition. You could expect the widest filter to have the smallest loss, so start with the transition between FL1 and FL2 and when that seems right, move on to the FL2 and FL2 transition, etc. The easiest way to do this is with a broadband noise generator (such as the Elecraft NGen) so you have a constant input to the K3 and it would be easy to evaluate the audio level using Spectrogram or some other audio spectrum analyzer, although a AC DMM connected across the speaker would give decent results. Once you have the filter gains equalized, you can easily change the filter offsets if necessary. While the 8 pole filter offsets are close to zero, it is not practical to expect that they are all exactly zero. 73, Don W3FPR W5UN wrote: I have three 8 pole filters installed, 2.8, 1.8, and .4 kHz. As I rotate the WIDTH knob, the filters switch in and out at their transition frequencies (as they should). But when that switch occurs, the background noise pitch frequency seems to jump to a different SHIFT frequency setting. In other words, the transition between filters is not smooth. I am wondering if all K3's with 8 pole filters do the same thing as mine? My filter offsets are all set to zero, as that is what I am told the 8 pole filters offsets should be. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SHIFT pitch
Hi, I find that shift has to be reduced progressively as width is reduced on SSB eg. 2.7KHz width *1.5KHz shift 2.1KHz *1.25KHz shift As I decrease the WIDTH past my 2.1KHz roofing filter with DSP, I constantly adjust SHIFT downwards to achieve normal sounding audio eg. 1.8KHz 1.1KHz shift I asked Lyle about it and he said that for SSB, LO and HIGH CUT should be used instead of WIDTH for SSB. WIDTH is meant for narrow bandwidth modes i.e. CW. Personally I find LO and HIGH cut arkward to use, especially when you have optional roofing filters installed. This is because the primary function of NORM is overloaded to automatically select the 2.7KHz roofing filter???. The secondary function of NORM (I/II) means you can have a some defaults, but try remembering what's behind them in the middle of a contest (if you get enough time to select them). It would be nice if the primary function of NORM just normalised the current filter width around the current shift value. Doug GM0ELP -- View this message in context: http://n2.nabble.com/SHIFT-pitch-tp2226432p2227687.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3/100 and the PSU (and Power Pole Repair)
On Tue, 27 Jan 2009 11:00:10 -0800 (PST), you wrote: I recently used a heavy guage cable (#8 stranded, I believe) between the K3 and PS in a portable operation. The extra stiffness of the cable caused a strain that fractured the plastic shell on the positive Power Pole connector in the K3. So, I agree that some sort of strain relief is in order if larger/stiffer cable is used. Perhaps the pig-tail mention earlier is a reasonable approach. Fortunately, I was able to replace the Power Pole plastic shells without disassembling the K3. It required: 1) removing both the positive and negative shells using a small tool to lift the metal connector blades inside, 2) mating a new pair of connector, 3) scraping off a small protusion on the positive connector to allow the assembly to fit in the rear panel opening, and 4) sliding the assembly over the connector blades. Perhaps this will help if someone else encounters this problem. Chuck, AE4CW Chuck and others, I have found that when you want larger cabling like #8 and above, the auto supply store is the best place to get flexible cables. The copper in these cables is ver fine, almost like hair. I'm feeding my two TE Systems amps (2 and 6m) with 04 battery cables from my 100 amp supply. The cables are not stiff. That would be over-kill for the K3, but these two amps draw 50 amps each at full power, and no, I don't run both at the same time ;o) Tom, N5GE http://www.n5ge.com http://www.swotrc.net [snip] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [Fwd: Re: SHIFT pitch]
Don, where do I find the AF voltmeter display? 73, Bill K9YEQ K2 #35; KX1 #35; K3 #1744; mini mods -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Tuesday, January 27, 2009 1:17 PM To: 'Elecraft' Subject: [Elecraft] [Fwd: Re: SHIFT pitch] Hi everyone, Lyle reminded me that the K3's built-in AF voltmeter display can be used as a reliable indicator of audio amplitude - it is a true RMS reading indication. He also indicated that a steady carrier can easily be used rather than the wideband noise source. If you use an on-the-air signal, be careful not to confuse amplitude changes caused by the filter with QSB on the signal. A QRP transmitter feeding a dummy load would probably serve as a steady source of carrier if you do not have a signal generator available. There are several ways to do a relative gain evaluation, and I mentioned only the way I am more used to using - I just didn't think of the others initially. 73, Don W3FPR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [Fwd: Re: SHIFT pitch]
Don, where do I find the AF voltmeter display? Please see the VFO B Alternate Displays section of the Owner's Manual. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Tuning aid on digi mode
Hello Ken! After downloading the new FW 2.80 I attempted to use the tuning aid (CWT) to zero beat a digi signal ( JT65A ) on 14076 + 200hz or 14076.2 The VFO tuned to 14075.8 or 200hz the wrong Direction . Currently, the only supported CW displays in data modes are FSK (AFSK as well as FSK D) -- usually for RTTY -- and PSK31 (only in mode PSK D). Use of CWT in DATA A is not recommended as the K3 has no knowledge of what type of signal you are tryign to tune (JT65, Pactor, Olivia, ...). 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Tuning aid on digi mode
K5DNL wrote: Hello All , After downloading the new FW 2.80 I attempted to use the tuning aid (CWT) to zero beat a digi signal ( JT65A ) on 14076 + 200hz or 14076.2 The VFO tuned to 14075.8 or 200hz the wrong Direction . Maybe the FW needs to look at the side band that is selected for that digi mode , most digi modes are upper side band. I'm surprised CWT is even available in sound card based data mode. In CW it works to center the signal to whatever SPOT frequency you selected. For the internally generated PSK and RTTY it works to center the signal on 1 KHz (fixed in the firmware.) It doesn't know what frequency you want to tune to when using sound card based software. When DATA A is selected it seems to me to be trying to help me tune the signal to 800Hz, my CW spot frequency. If you use Fldigi then it has a QSY button that will shift a signal selected in the waterfall to a sweet spot that you specify. Fldigi doesn't support JT65A, though. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Tuning-aid-on-digi-mode-tp2227536p2227828.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SHIFT pitch
Doug, GM0ELP wrote: Personally I find LO and HIGH cut arkward to use, especially when you have optional roofing filters installed. This is because the primary function of NORM is overloaded to automatically select the 2.7KHz roofing filter???. The secondary function of NORM (I/II) means you can have a some defaults, but try remembering what's behind them in the middle of a contest (if you get enough time to select them). It would be nice if the primary function of NORM just normalised the current filter width around the current shift value. When using narrow (250 Hz 8-pole XTAL) filters in the two receivers I find the shift is sensitive to touch and adjust. It would be good to have smaller increments than the present. I usually have the CW pitch set to 520 Hz. Cannot remember it was this sensitive before the latest F/W upgrade, was it? any one else noticed this? 73 Len SM7BIC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Beware! (Learn by doing?) :-)))
Gentlemen, A few days ago I was messing around with the K3 (as usual) and having set the AF gain control at about 11 O'clock with the AGC set for fast I wondered what would the audio results be if I switched OFF the AGC with that particular setting. BIG MISTAKE! When the AGC is OFF the resulting audio thru the speaker almost blew out my left-eardrum!!! In other rigs that was never a concern because it would never happen (PERIOD!) Why such a HUGE difference in audio between on/off states of (AGC) in the K3??? A K3 Greenhorn, Jim/nn6ee S/N 2406 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SHIFT pitch
Doug, I always use the HiCut/LoCut for SSB and just forget about the NORM settings. The center frequency will be automatically set and it is quick to turn the HI knob just enough to reduce interference - the roofing filters will switch in automatically as required to support the DSP bandwidth. If you listen to a SSB signal and try using the LO and HI CUT knobs, you should observe that you can cut a lot at the high end, but not much can be cut on the low end without loosing intelligibility. I agree it is a pain to maintain intelligibility for a voice signal when using the WIDTH and SHIFT controls - every time the width is changed, the shift must be adjusted to maintain a usable speech response - it is a requirement, just like you indicated. If you look at the frequency content of a human voice, you will find that there must always be energy in the 300 to 500 Hz range to maintain intelligibility. If you have a 2.2 kHz filter set that extends from 300 Hz to 2500 Hz (filter center 1.4), and you narrow that using the width control to 1.8 kHz, the filer center will stay at 1.4 kHz, and the filter will span from 500 Hz to 2.3 kHz - the important portion of the signal at 300 to 500 Hz will be gone, and the passband must be re-centered at 1.2 kHz to gain it back. I believe it is much easier to set the LoCut somewhere in the 200 to 350 Hz range (let's assume it is set at 300 Hz). For a 2.2 kHz filter width, set the HiCut to 2.5 kHz. If you then move the HiCut down to 2.1 kHz, the filter width is now 1.8 kHz and intelligibility is maintained - if you have the 1.8 kHz roofing filter installed, it should be switched in automatically when the width is reduced to 1.8 kHz either by using the HiCut or the WIDTH control. One does not have to do the addition and subtraction to determine the filter width at all - just change the HI CUT knob until the QRM is reduced sufficiently - move LO CUT a little if that is necessary too, but do it while listening to the signal, you will know when the desired signal becomes unintelligible. Try it - if your narrow filters do not switch in automatically when using only the HiCut, there is something wrong. Let the DSP do the math for you, it is much faster at that task than either of us are. 73, Don W3FPR GM0ELP wrote: Hi, I find that shift has to be reduced progressively as width is reduced on SSB eg. 2.7KHz width *1.5KHz shift 2.1KHz *1.25KHz shift As I decrease the WIDTH past my 2.1KHz roofing filter with DSP, I constantly adjust SHIFT downwards to achieve normal sounding audio eg. 1.8KHz 1.1KHz shift I asked Lyle about it and he said that for SSB, LO and HIGH CUT should be used instead of WIDTH for SSB. WIDTH is meant for narrow bandwidth modes i.e. CW. Personally I find LO and HIGH cut arkward to use, especially when you have optional roofing filters installed. This is because the primary function of NORM is overloaded to automatically select the 2.7KHz roofing filter???. The secondary function of NORM (I/II) means you can have a some defaults, but try remembering what's behind them in the middle of a contest (if you get enough time to select them). It would be nice if the primary function of NORM just normalised the current filter width around the current shift value. Doug GM0ELP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Display voltage
Thanks for the many responses, both private and via the forum. I substituted a metered Astron PS and went directly from the PS to the K3 with Elecraft supplied power cord.. Now the measurements are: 100w 13.9v to 12.9v; 50w 13.9v to 13.3v. this I can live with... My previous setup was the Astron to Rigrunner to K3...approx cable was 4ft from PS to Rigrunner and 4 to 5 ft to K3; PLUS, Rigrunner had LP-100, SixPak and Steppir tuning relay...K3 is supplying power to microKeyer II via 13.6v back panel accessory. Pardon the pun but, voltage drops, it all adds up Que intersante! I learn so much from the erudite members of this reflector (look that up in your Funk n' Wagnalls!) Just another reason why Elecraft is simply the best... 73 Tom ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
Jim, We old-timers learned about that long ago - do NOT turn AGC off without first turning the gain down! As for other receivers not doing that - many do not allow the AGC to be turned off at all, they have only AGC Fast and Slow available on a button - if one wants to reduce the AGC action, reducing the RF gain is about the only way to accomplish it. At least on the Yaesu FT900 and FT847 I know that is true, other transceivers may allow AGC off, but those I have encountered recently, except for the K2 and K3, do not. 73, Don W3FPR JIM DAVIS wrote: Gentlemen, A few days ago I was messing around with the K3 (as usual) and having set the AF gain control at about 11 O'clock with the AGC set for fast I wondered what would the audio results be if I switched OFF the AGC with that particular setting. BIG MISTAKE! When the AGC is OFF the resulting audio thru the speaker almost blew out my left-eardrum!!! In other rigs that was never a concern because it would never happen (PERIOD!) Why such a HUGE difference in audio between on/off states of (AGC) in the K3??? A K3 Greenhorn, Jim/nn6ee S/N 2406 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.14/1918 - Release Date: 1/27/2009 7:26 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
On Tue, 27 Jan 2009 15:15:49 -0500 Don Wilhelm w3...@embarqmail.com wrote: Jim, We old-timers learned about that long ago - do NOT turn AGC off without first turning the gain down! As for other receivers not doing that - many do not allow the AGC to be turned off at all, they have only AGC Fast and Slow available on a button - if one wants to reduce the AGC action, reducing the RF gain is about the only way to accomplish it. At least on the Yaesu FT900 and FT847 I know that is true, other transceivers may allow AGC off, but those I have encountered recently, except for the K2 and K3, do not. 73, Don W3FPR JIM DAVIS wrote: Gentlemen, A few days ago I was messing around with the K3 (as usual) and having set the AF gain control at about 11 O'clock with the AGC set for fast I wondered what would the audio results be if I switched OFF the AGC with that particular setting. BIG MISTAKE! When the AGC is OFF the resulting audio thru the speaker almost blew out my left-eardrum!!! In other rigs that was never a concern because it would never happen (PERIOD!) Why such a HUGE difference in audio between on/off states of (AGC) in the K3??? A K3 Greenhorn, Jim/nn6ee S/N 2406 *** Don M'Boy, You live a sheltered life! The TenTec Orion allowed the user to shutoff the AGC @ will and the resulting big difference in audio was NOT THERE! At best maybe a s-unit or so but nothing approaching what I had described earlier. But it was a great learning experience (sort of like first-marriages!!! :-))) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
That has happened to me, too. I think it's because the AF amp has a lot of headroom, especially if config af gain = HI. There is an AF limiter setting: config tech md = on config af lim = 20 (adjust to personal preference) I operated my old TS-850 with agc off on cw, but can't really do it with the K3 without riding the rf or af gain control. Loud signals either hurt my ears, or hit the limiter, making them sound like mush. I operate the K3 on cw with fast agc, config agc slp = 0, config agc thr = 8. That seems to work well for me. Dave Hachadorian, K6LL Yuma, AZ - Original Message - From: JIM DAVIS nn...@astound.net To: elecraft@mailman.qth.net Sent: Tuesday, January 27, 2009 7:52 PM Subject: [Elecraft] Beware! (Learn by doing?) :-))) Gentlemen, A few days ago I was messing around with the K3 (as usual) and having set the AF gain control at about 11 O'clock with the AGC set for fast I wondered what would the audio results be if I switched OFF the AGC with that particular setting. BIG MISTAKE! When the AGC is OFF the resulting audio thru the speaker almost blew out my left-eardrum!!! In other rigs that was never a concern because it would never happen (PERIOD!) Why such a HUGE difference in audio between on/off states of (AGC) in the K3??? A K3 Greenhorn, Jim/nn6ee S/N 2406 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
- Original Message - From: Don Wilhelm w3...@embarqmail.com ...other transceivers may allow AGC off, but those I have encountered recently, except for the K2 and K3, do not. TS-480SAT, no real change in audio level when AGC is off. Simon Brown, HB9DRV www.ham-radio-deluxe.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SSB IMD
I predict that the power supply claim will turn out to be bogus. The K2 has voltage regulators all through it, and runs well down to -- is it 10 volts? Before making statements like that please look at the K3 schematics. Power for the KPA3 is taken from the power supply input immediately after the RF choke, to J67B/P67B, through R3 (the current sense resistor for the metering), to J78B/P68B and to the final amplifier transistors via an RF filter. There is absolutely no regulation of the Vcc applied to the push-pull 2SC2782 pair used in the KPA3. I can guarantee that running the KPA3 will result in low power output (80 watts?) with significant IMD at that level. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Peter Wollan Sent: Tuesday, January 27, 2009 1:48 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] SSB IMD This is possible, but, as far as I know, it is untested. I've read several anecdotes claiming poor SSB performance, and several others claiming excellent SSB performance. What's needed is for someone to take one of the poor K3's, and change some factor that turns it into an excellent K3. Such as, plug it into a better power supply, and show that one power supply consistently produces good results and another consistently produces bad results. I predict that the power supply claim will turn out to be bogus. The K2 has voltage regulators all through it, and runs well down to -- is it 10 volts? The K3 needs a bit more oomph, but I'll bet Wayne designed it to be robust, too. I further predict that the bad SSB performance will turn out to be either an adjustment issue, or an external amplifier issue. I'd love to see some experiments. Peter N8MHD On 1/27/09, Joe Subich, W4TV li...@subich.com wrote: Is there something critical in the radio that gives this outcome? Critical adjustment perhaps? Is it very sensitive what PS we use (ala W4ZV)? Yes, it is very sensitive to power supply voltage. Look at any of the application notes - the one Craig mentions for the P-P RD100HHF FETs is a good example. Decreasing Vcc (or Vdd) by just one Volt will increase the IMD at 100 Watts by 10 dB and decrease the maximum output power by almost 20 Watts. Running the power supply at 14.0 - 14.5 Volts and using a power supply with good dynamic regulation will go a long way to keeping the K3 clean. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jan Erik Holm Sent: Tuesday, January 27, 2009 1:54 AM Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] SSB IMD Yes I´ve seen those figures, there are are lot of data from component manufactures however by the time we see the finished product data doesn´t even come close. I tried to look for the data on the FT-990 that K6LL informed about but couldn´t find it. I was thinking what reference level they used, I think I remember ARRL changed their procedure, the -38 prity well could be -32 in real life. However, something struck me, why is it we see this big variation in data on the IMD3? We have a spread between -38 to -24 dB. A number of people has measured below -30 dB and as far as I know only one around -38 dB. Who is right and who is wrong? Is there something critical in the radio that gives this outcome? Critical adjustment perhaps? Is it very sensitive what PS we use (ala W4ZV)? As I said before, here I am first time on 20m SSB and people report trash around my signal, i e bad IMD. However at that time I had K3 at 120W, aftter I´ve made measurements and it looks like something slowly starts to happen at 80W. Also I have myself heard K3´s on SSB with trash around the signal however I have also heard K3´s that did NOT have that. So what´s going on here, I´m getting reel puzzled and frankly quite tired of this. I wish there would be a service manual available, like there is for any Japanese rice box. I mean a manual that contains all data for all adjustments. Why not?? / Jim SM2EKM --- Joe Subich, W4TV wrote: Jan Erik Holm wrote: Bill and others, hold on and think about these figures. -35 to -38 dB IM3 !! We are dealing with 2SC2782 transistors operating at around 12V DC. I say no more, the knowledge and intelligent individual will understand. I would be careful here ... the Toshiba 2SC2879 data sheet clearly does -38dB IMD at 60 watts with VCC=12.5V. There are certainly devices capable of that level of performance means that there are devices capable of that level just as there are devices capable of similar levels of
Re: [Elecraft] SHIFT pitch
For ssb contests, I've got Norm 1 set for BW=1.8, FC=1.1 I leave the controls in the shift/width mode and make minor tweaks on the shift control to maximize intelligibility with different voice characteristics. I don't touch the width control during the contest. There are a lot of different ways to operate this radio. Dave Hachadorian, K6LL Yuma, AZ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
A few days ago I was messing around with the K3 (as usual) and having set the AF gain control at about 11 O'clock with the AGC set for fast I wondered what would the audio results be if I switched OFF the AGC with that particular setting. BIG MISTAKE! When the AGC is OFF the resulting audio thru the speaker almost blew out my left-eardrum!!! In other rigs that was never a concern because it would never happen (PERIOD!) Why such a HUGE difference in audio between on/off states of (AGC) in the K3??? The K3 AGC can be set for varying threshold and compression, so turning AGC on and off can reveal dramatic differences in signal level. Recent releases of K3 firmware have an audio limiter that can be set to limit audio levels when AGC is OFF. See the firmware release notes or the latest K3 Manual for how to use the CONFIG:AF LIM feature. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
You live a sheltered life! The TenTec Orion allowed the user to shutoff the AGC @ will and the resulting big difference in audio was NOT THERE! At best maybe a s-unit or so but nothing approaching what I had described earlier. But it was a great learning experience (sort of like first-marriages!!! :-))) I don't know how the K3 does it, but you cannot turn off AGC in the Orion. In the Orion, AGC off simply means AGC very very fast. Tune in a nice loud station with AGC on the R-390, and then flip it off. Best if you you are listening through headphones through a good amplifier with LOTS of headroom ;) After doing that, you won't be able to tell if you have AGC on or off, or if the receiver is on or off, although it will give you a good excuse to give out a didn't hear you to those verbal honey-do's from the spouse :-) Grant/NQ5T ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
Call me dense, but I'm not understanding why one would expect that turning AGC off would NOT result in a huge jump in AF output. AGC turns down RX gain - a lot. The only time there should be no change in AF output is when the RF input is so low that it hasn't reached the AGC threshold. Maybe other manufactures have coupled AGC on/off with AF attenuation, so if the AGC is off, AF output is automatically reduced by 20 dB or something. For this very reason, I always run with AGC on. Even when I want the rig to act like it's off, I leave it on, set to Fast and then just turn the RF gain down to put my signal of interest down near the point where AGC is doing very little. AGC is still on to protect me in case some big signal QRM or QRN shows up. - Keith N1AS - - K3 711 - -Original Message- The TenTec Orion allowed the user to shutoff the AGC @ will and the resulting big difference in audio was NOT THERE! ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-))) (Grant)
On Tue, 27 Jan 2009 14:43:04 -0600 Grant Youngman n...@tx.rr.com wrote: You live a sheltered life! The TenTec Orion allowed the user to shutoff the AGC @ will and the resulting big difference in audio was NOT THERE! At best maybe a s-unit or so but nothing approaching what I had described earlier. But it was a great learning experience (sort of like first-marriages!!! :-))) I don't know how the K3 does it, but you cannot turn off AGC in the Orion. In the Orion, AGC off simply means AGC very very fast. Tune in a nice loud station with AGC on the R-390, and then flip it off. Best if you you are listening through headphones through a good amplifier with LOTS of headroom ;) After doing that, you won't be able to tell if you have AGC on or off, or if the receiver is on or off, although it will give you a good excuse to give out a didn't hear you to those verbal honey-do's from the spouse :-) Grant/NQ5T ___ OH CONTRE Mon'Ami!!! With having used and loved the TT Orion until the K3 came on the scene, the AGC (when-- off) was nothing close to (ultra Fast)! I say that because when also having IT'S NB (hardware-- if. blanker on) there was much less audio-distortion layed onto the resultant audio so as to permit us to HEAR WORK weak signals from our particular location in Concord, Ca. Ca. where the noise can be as high as 10db/S-9 average (especially during the dry/warm months of the year! Your hearing characteristics are obviously a heck of alot different than mine are! Jim/nn6ee S/N 2406 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Preserve Encourage CW Activity in 2009!
New Years 2009 may have come and gone but its never too late to resolve to help preserve and encourage CW activity across our amateur bands. To celebrate the new year, come and join the NAQCC (North American QRP CW Club), a club for any and ALL CW enthusiasts around the world. Our members include Big Gun contesters, hard-core QRPers, experimenters, ragchewers and SWLers; young and old alike. As different as we may be, we all share one thing in common, and that is our love for CW. We welcome all who want to help support CW and have at least some interest in using QRP from time-to-time. Our club runs monthly sprints and challenges. Plus we sponsor some additional special on-air activities during the year. Membership is free and once you join you're automatically a lifetime member! So sign up today and help us keep CW alive and well. Visit our web site at http://www.usatek.net/~yoel/. You'll find info on all of our various activities plus an online membership application. We look forward to your support and hope to soon see your call added to our membership roster. 73, Paul/KD2MX NAQCC Membership Recruiter On behalf of: Tom, WY3H - NAQCC President John, K3WWP - NAQCC Vice President Larry, W2LJ - NAQCC Asst. Publicity Director Dave, VA3RJ/VE3JDR - NAQCC Publicity Officer ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Tuning aid on digi mode
The tuning aid CWT works in CW, PSK and FSK only. The auto spot feature works in CW and PSK. - 73, Greg - AB7R Whidbey Island WA NA-065 On Tue Jan 27 10:55 , Ken Roberson sent: Hello All , After downloading the new FW 2.80 I attempted to use the tuning aid (CWT) to zero beat a digi signal ( JT65A ) on 14076 + 200hz or 14076.2 The VFO tuned to 14075.8 or 200hz the wrong Direction . Maybe the FW needs to look at the side band that is selected for that digi mode , most digi modes are upper side band. TU 73 Ken K5DNL ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-))) (Grant)
OH CONTRE Mon'Ami!!! With having used and loved the TT Orion until the K3 came on the scene, the AGC (when-- off) was nothing close to (ultra Fast)! I We should take this off-list (if there's some reason to continue), but having also been the owner of 2 Orions and an Orion II, I believe that is the way AGC OFF was implemented. As I recall, it had an extremely high decay rate of 1000dB/sec , but nonetheless was still technically on. Perhaps fast was a bad choice of terms to relate to decay rate. in any case, it appears the K3 may work a bit differently. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] FS: NIB K3 sub-receiver
New in box, Opened only to read the manual. K3 sub-receiver module, only a few week old. No waiting. Shipped to your door via priority mail. $525 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
Jim: A few days ago I was messing around with the K3 (as usual) and having set the AF gain control at about 11 O'clock with the AGC set for fast I wondered what would the audio results be if I switched OFF the AGC with that particular setting. BIG MISTAKE! When the AGC is OFF the resulting audio thru the speaker almost blew out my left-eardrum!!! In other rigs that was never a concern because it would never happen (PERIOD!) Why such a HUGE difference in audio between on/off states of (AGC) in the K3??? With all due respect, pal, that's what you get when you turn the Automatic GAIN Control OFF... you no longer have automatic gain 'leveling' and then are completely dependent upon MANUALLY controlling the AF GAIN! However, there IS a setting in the K3 CONFIG menu [AF LIM] which will allow you to limit the amount of output when you turn the AGC off. Hope this helps, 73, Tom HammondN0SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
Simon, I certainly don't doubt your word, but I wonder how the TS-480SAT does that - it must reduce the gain somehow. I have been using and building receivers since the mid 1950s and in all cases, turning off the AGC will increase the audio in the receiver - that is true UNLESS there are NO signals at the input strong enough to activate the AGC. The K3 shows no change in the audio level when connected to a dummy load and the AGC is changed from on to off. If there are signals that are being received and the AGC is holding down the gain of the receiver to compensate for those strong signals, then turning off that gain control mechanism would normally result in an increase in the audio level. If it does not, then that receiver used some mechanism other than the AGC to reduce the gain when AGC is off (I would not want my receiver to do that). Normally the increase in audio will depend on just how strong the strongest signal in the passband actually is. 73, Don W3FPR Simon (HB9DRV) wrote: - Original Message - From: Don Wilhelm w3...@embarqmail.com ...other transceivers may allow AGC off, but those I have encountered recently, except for the K2 and K3, do not. TS-480SAT, no real change in audio level when AGC is off. Simon Brown, HB9DRV www.ham-radio-deluxe.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 for sale in UK
K2/100 #3764, updated to current/latest standard (built by GU3MBS, October 2003). With KSB2 SSB adapter mic. K160RX 160m/RX ant module KAF2 Audio filter/clock K2VCO shielding kit PA screening kit Finger dimple Latest firmware (2.04) Key click mod In excellent condition, complete with original manuals, documentation and packaging. £600. Selling on behalf of radio club. 73, Fraser G4BJM f.g.robert...@open.ac.uk _ Check out the new and improved services from Windows Live. Learn more! http://clk.atdmt.com/UKM/go/132630768/direct/01/___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] CW activation while in USB mode...
I am not sure if this is a bug or I am just doing something wrong, but I selected the + option yesterday to be able to send CW while in the USB mode, and plugged my external keyer into the KEY jack on the back of the K3. I tried it, but never could seem to get the rig to send CW while I was in USB mode. However, today when I started up trying to run a 6m EME sked, I found that when the PTT line was closed by my sequencer, the K3 started transmitting immediately and I heard a sidetone in the speaker. All while the tones from the computer also were coming through to the mic input. It was as if the rig was trying to send a CW carrier at the same time as SSB or something! I finally figured out that it was nothing in the latest firmware download, but that I could get things back to normal by changing the CW option back to -. Anybody have any idea what is going on? TNX and VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj 2m DXCC #11, 6m DXCC #815 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3: Sending RTTY from the paddle
I haven't tried this myself but have seen somebody else do it. Does anyone know if it is possible to send CW from say a laptop and to be transmitted as RTTY.. Couple of weeks ago I was on vacation in EA8 and ran my microham unit with a laptop running win-test in expedition mode into my K3. I would liked to have worked the TS7C who were loud with me on rtty, after all I could copy them on the LCD readout of the K3. I did not have a paddle with me but sent CW from the laptop keyboard. I tried to get it to send RTTY but only got a tone I assume if one is using the internal keyer of the K3 you may only input CW via a paddle? Tom GM4FDM For anybody interested my EA8/GM4FDM log is on LOTW --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 090127-0, 27/01/2009 Tested on: 27/01/2009 22:25:17 avast! - copyright (c) 1988-2009 ALWIL Software. http://www.avast.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Sending RTTY from the paddle
I haven't tried this myself but have seen somebody else do it. Does anyone know if it is possible to send CW from say a laptop and to be transmitted as RTTY.. Currently, you must use the paddle inputs on the K3 to use the CW - RTTY feature. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Sending RTTY from the paddle
I haven't tried this myself but have seen somebody else do it. Does anyone know if it is possible to send CW from say a laptop and to be transmitted as RTTY.. Currently, you must use the paddle inputs on the K3 to use the CW - RTTY feature. However, K3 Utility has a terminal function which can be used for RTTY (and PSK31 as well as CW) if you have a computer attached to your K3. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Sending RTTY from the paddle
Lyle Johnson wrote: However, K3 Utility has a terminal function which can be used for RTTY (and PSK31 as well as CW) if you have a computer attached to your K3. My program KComm can also send PSK31 and RTTY (and CW) from the keyboard using the same method. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/New-Eham.net-K3-review-by-QRPNEW-tp2218086p2228848.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] CW activation while in USB mode...
Lance, Do you have your K3 set to PTT or VOX? If you have it set to PTT, then the PTT must be closed before keying can begin - that is true whether in CW+SSB or not. 73, Don W3FPR Lance Collister wrote: I am not sure if this is a bug or I am just doing something wrong, but I selected the + option yesterday to be able to send CW while in the USB mode, and plugged my external keyer into the KEY jack on the back of the K3. I tried it, but never could seem to get the rig to send CW while I was in USB mode. However, today when I started up trying to run a 6m EME sked, I found that when the PTT line was closed by my sequencer, the K3 started transmitting immediately and I heard a sidetone in the speaker. All while the tones from the computer also were coming through to the mic input. It was as if the rig was trying to send a CW carrier at the same time as SSB or something! I finally figured out that it was nothing in the latest firmware download, but that I could get things back to normal by changing the CW option back to -. Anybody have any idea what is going on? TNX and VY 73, Lance ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2-XV222 RFI Susceptibility Problems
I just got my XV222 going with the K2 a couple of weeks ago. It works great but I get some odd behaviour when I transmit on other bands. The set-up: -K2 in QRP configuration (with KSB2, K160RX, K60XV with Key Out brought to a RCA jack, with a bypass cap) -XV222 in non-K2 / 1mW configuration connected to the K60XV (trn3) -Microwave Modules 432 MHz transverter connected through an attenuator to the QRP antenna jack and the External Antenna jack (though a switch) (trn4) -Key line from Key Out jack to above two transverters is switched (all shielded cable) -903 MHz receiving converter alternately connected to the External Antenna jack (through a switch) (trn5) -25 watt 144 MHz rig (sharing power supply with all the above) -10 watt 50 MHz rig (completely separate) What happened (when switches and K2 set to 222 MHz): When I transmitted on 6m (10 watts, antenna very close to equipment as this is an apartment station) the XV222 indicated a transmit IF overload condition (flashing LEDs). Yes, it's a pretty high field strength, but it should be about the same as could be expected in a mobile/rover setup (which is how I intend to use this gear this summer). When I transmitted on 2m (25 watts, but antenna further away) a relay could be heard switching in the XV222, the K2 went quiet and the S-meter went to full scale. Investigations: The 2m problem seems to have been solved. I found that the TX IF plug into the K60XV was not making good ground contact, so it was picking up a lot of RF. However, it is worth noting that before I discovered the connector problem I noted that the strange behaviour occurred even with the 2m transmitter connected to a dummy load, i.e. with very low field strength (probably mostly radiation from the 2m rig's power cable). Having fixed the connector contact above, the 6m problem persisted. I seem to have fixed the XV222 IF overload problem when transmitting on 6m by making the following modifications to the XV222: - scraped the paint off the inside of the rear panel under a couple of the nuts holding the N-type antenna connector - put a 4.7nF bypass capacitor across the 13.8 V power leads where they connect to the PC board (for those concerned about safety, it is externally as well as internally fused). I did both of these mods at the same time so I don't know which one(s) actually helped. But I now have the symptoms initially noticed on 2m when transmitting on 6m. Apparently the RF is causing the key output from the K60XV to go to ground, but why the S-meter is reading and the receiver is going quiet I don't understand. The K2 is not going fully into transmit...with RIT on the displayed frequency does not change. There seem to be two issues here... (1) the XV222 box is not very RF-tight. Probably mostly due to understandable tradeoffs using of connectors where the shield is not connected directly to the case. I've made some improvement to that but it is not enough. I'll probably look at some sort of external grounding strap for the IF and key in connectors. Maybe a ferrite choke on the power cord. (2) something in the K60XV or K2 is very sensitive to RF and turns on the key line. I did try a bypass cap between pins 1 and 2 of P1, with no apparent effect. Typically disconnecting the TX IF (and sometimes the RX IF) cables from the K2/K60XV stops the strange behaviour. All 3 K60XV jacks on the K2 are grounded directly to the case. I intend to try seeing if I can trigger the key line problem with a low power 50 MHz signal generator feeding into the K60XV jacks, so I can do a more controlled test, but I haven't got to this yet. I am not sure how much power I can safely put into the RX jack. So..any suggestions ? Similar experiences ? Theories on why the K2/K60XV key line gets switched or why the S-meter goes to maximum for a signal that is 22 MHz from where the K2 is receiving ? 73, Steve Kavanagh VE3SMA __ Looking for the perfect gift? Give the gift of Flickr! http://www.flickr.com/gift/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Sending RTTY from the paddle
Tom Wylie wrote: I haven't tried this myself but have seen somebody else do it. Does anyone know if it is possible to send CW from say a laptop and to be transmitted as RTTY.. Couple of weeks ago I was on vacation in EA8 and ran my microham unit with a laptop running win-test in expedition mode into my K3. I would liked to have worked the TS7C who were loud with me on rtty, after all I could copy them on the LCD readout of the K3. I did not have a paddle with me but sent CW from the laptop keyboard. I tried to get it to send RTTY but only got a tone Win-Test integrates (to some degree, at least) with MMTTY. I don't know if it works in DXpedition mode, but it'd be worth a try... ~Iain ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
The reason radios need such a large dynamic range (one of the K3's selling points) is because there is an enormous difference in signal strength between the weakest and strongest signals on the band. The purpose of the AGC is to reduce that enormous range to a much smaller range that is more tolerable to your ears. The K3 offers a wide range of AGC settings (AGC THR and AGC SLP). There is a very good explanation of the effects of AGC THR and AGC SLP at http://www.cliftonlaboratories.com/elecraft_k3_agc_and_s-meter.htm . When the AGC settings are at their most aggressive (AGC SLP = 15, AGC THR = 2), there is very little difference in audio output level across a very wide range of signal strengths. If your AGC is set to be this aggressive, then turning AGC off will inevitably result in strong signals becoming much louder, possibly by several tens of dB. If your AGC is set to its least aggressive settings (AGC SLP = 0, AGC THR = 8), you will hear a much broader range of signal strength levels with the AGC on, to the extent that you may have to ride the gain controls as you tune from weak to strong signals (especially on a quiet band), but turning AGC off will have a less dramatic impact. If you are observing a more dramatic difference between AGC off and on with the K3 than with another radio, maybe you have the K3's AGC set to be more aggressive than the other radio's. Try decreasing the K3's AGC SLP setting to see if that makes it behave more to your liking. 73, Rich VE3KI K3 #1595 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
On Jan 27, 2009, at 12:57 PM, Darwin, Keith wrote: For this very reason, I always run with AGC on. Even when I want the rig to act like it's off, I leave it on, set to Fast and then just turn the RF gain down to put my signal of interest down near the point where AGC is doing very little. AGC is still on to protect me in case some big signal QRM or QRN shows up. - Keith N1AS - - K3 711 - I also leave the AGC on but I use minimum slope and maximum threshold. If the AGC is off, the NR doesn't work (but, unlike many rigs, the S Meter does). Otherwise, I would leave the AGC off. Butt it is good to have some sort of limiter to protect my hearing. 73 Rick Dettinger K7MW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Tuning aid on digi mode
Not as much fun as making CONFIG:ALARM wake me up and start the coffee.. but tempting to try.. (ala Wallace and Gromit) Anyway-- That reminds me.. not to forget... Not sure if it got on the list since the LyleFest in Mt. Vernon... Really could very much use a MENU setting that quells VFO-B from reverting to anything other than decoded message when decoding is enabled. My short term memory has it's own QSB and after the other station wizzes by, if I don't copy it I lose it. I hate losing it. Maybe I already lost it.. Who are you again? I fully appreciate the intent of the original design. I don't wish to take away the original design, just request that if so configured, the decoded message remains un-changed by the apparent time-out to bring back whatever the DISP writes to VFO-B. And for release MCU 4+, maybe pause, rewind and replay in text only, not KDVR-style. I don't know if Elecraft realizes how bees knees the decoder widget we made for fun turns out to be. It's cool. Make it cooler! And to nip it in the bud, I will not use a PC to 'cw-get'. I operate the K3 and just the K3. -jeff ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SHIFT pitch
I haven't found it any more sensitive. The granularity is 50hz and I believe that 10hz would work much better for CW. Because of this, I really never use shift as I have in other rigs. 73, Gary W7TEA When using narrow (250 Hz 8-pole XTAL) filters in the two receivers I find the shift is sensitive to touch and adjust. It would be good to have smaller increments than the present. I usually have the CW pitch set to 520 Hz. Cannot remember it was this sensitive before the latest F/W upgrade, was it? any one else noticed this? 73 Len SM7BIC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- View this message in context: http://n2.nabble.com/SHIFT-pitch-tp2226432p2229030.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] CW activation while in USB mode...
Lance and all, I was mistaken (I was prompted to try it with CW+SSB). CW in SSB seems to only work using the hit the key method. Once PTT is active, it will not work at all, only the SSB inputs work. I cannot duplicate your setup since I do not have your sequencer controls here. Are you using TX INH as well as the PTT input to the K3 from your sequencer? 73, Don W3FPR Don Wilhelm wrote: Lance, Do you have your K3 set to PTT or VOX? If you have it set to PTT, then the PTT must be closed before keying can begin - that is true whether in CW+SSB or not. 73, Don W3FPR Lance Collister wrote: I am not sure if this is a bug or I am just doing something wrong, but I selected the + option yesterday to be able to send CW while in the USB mode, and plugged my external keyer into the KEY jack on the back of the K3. I tried it, but never could seem to get the rig to send CW while I was in USB mode. However, today when I started up trying to run a 6m EME sked, I found that when the PTT line was closed by my sequencer, the K3 started transmitting immediately and I heard a sidetone in the speaker. All while the tones from the computer also were coming through to the mic input. It was as if the rig was trying to send a CW carrier at the same time as SSB or something! I finally figured out that it was nothing in the latest firmware download, but that I could get things back to normal by changing the CW option back to -. Anybody have any idea what is going on? TNX and VY 73, Lance ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.14/1918 - Release Date: 1/27/2009 7:26 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2-XV222 RFI Susceptibility Problems
Hello Steve, The case of XV series is not so RF tight. Please sand off the paint in the internal surface of the rear panel especially the surfaces near the connectors. Also sand off all case surfaces near the fasteners. For the power module, sand off bottom part as well because some of the modules are not fact at all. Hope this help and report back to this reflector of your further findings. 73 Johnny VR2XMC --- 2009年1月28日 星期三，Steve Kavanagh skavanag...@yahoo.ca 寫道﹕ 寄件人: Steve Kavanagh skavanag...@yahoo.ca 主題: [Elecraft] K2-XV222 RFI Susceptibility Problems 收件人: elecraft@mailman.qth.net 日期: 2009 1 28 星期三 上午 6:56 I just got my XV222 going with the K2 a couple of weeks ago. It works great but I get some odd behaviour when I transmit on other bands. The set-up: -K2 in QRP configuration (with KSB2, K160RX, K60XV with Key Out brought to a RCA jack, with a bypass cap) -XV222 in non-K2 / 1mW configuration connected to the K60XV (trn3) -Microwave Modules 432 MHz transverter connected through an attenuator to the QRP antenna jack and the External Antenna jack (though a switch) (trn4) -Key line from Key Out jack to above two transverters is switched (all shielded cable) -903 MHz receiving converter alternately connected to the External Antenna jack (through a switch) (trn5) -25 watt 144 MHz rig (sharing power supply with all the above) -10 watt 50 MHz rig (completely separate) What happened (when switches and K2 set to 222 MHz): When I transmitted on 6m (10 watts, antenna very close to equipment as this is an apartment station) the XV222 indicated a transmit IF overload condition (flashing LEDs). Yes, it's a pretty high field strength, but it should be about the same as could be expected in a mobile/rover setup (which is how I intend to use this gear this summer). When I transmitted on 2m (25 watts, but antenna further away) a relay could be heard switching in the XV222, the K2 went quiet and the S-meter went to full scale. Investigations: The 2m problem seems to have been solved. I found that the TX IF plug into the K60XV was not making good ground contact, so it was picking up a lot of RF. However, it is worth noting that before I discovered the connector problem I noted that the strange behaviour occurred even with the 2m transmitter connected to a dummy load, i.e. with very low field strength (probably mostly radiation from the 2m rig's power cable). Having fixed the connector contact above, the 6m problem persisted. I seem to have fixed the XV222 IF overload problem when transmitting on 6m by making the following modifications to the XV222: - scraped the paint off the inside of the rear panel under a couple of the nuts holding the N-type antenna connector - put a 4.7nF bypass capacitor across the 13.8 V power leads where they connect to the PC board (for those concerned about safety, it is externally as well as internally fused). I did both of these mods at the same time so I don't know which one(s) actually helped. But I now have the symptoms initially noticed on 2m when transmitting on 6m.. Apparently the RF is causing the key output from the K60XV to go to ground, but why the S-meter is reading and the receiver is going quiet I don't understand. The K2 is not going fully into transmit...with RIT on the displayed frequency does not change. There seem to be two issues here... (1) the XV222 box is not very RF-tight. Probably mostly due to understandable tradeoffs using of connectors where the shield is not connected directly to the case. I've made some improvement to that but it is not enough. I'll probably look at some sort of external grounding strap for the IF and key in connectors. Maybe a ferrite choke on the power cord. (2) something in the K60XV or K2 is very sensitive to RF and turns on the key line. I did try a bypass cap between pins 1 and 2 of P1, with no apparent effect. Typically disconnecting the TX IF (and sometimes the RX IF) cables from the K2/K60XV stops the strange behaviour. All 3 K60XV jacks on the K2 are grounded directly to the case. I intend to try seeing if I can trigger the key line problem with a low power 50 MHz signal generator feeding into the K60XV jacks, so I can do a more controlled test, but I haven't got to this yet. I am not sure how much power I can safely put into the RX jack. So..any suggestions ? Similar experiences ? Theories on why the K2/K60XV key line gets switched or why the S-meter goes to maximum for a signal that is 22 MHz from where the K2 is receiving ? 73, Steve Kavanagh VE3SMA __ Looking for the perfect gift? Give the gift of Flickr! http://www.flickr.com/gift/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help:
Re: [Elecraft] SHIFT pitch
W7TEA wrote: The granularity is 50hz and I believe that 10hz would work much better for CW. We're planning to improve SHIFT granularity (etc.) in a future firmware release. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT: Orion AGC OFF (was learn by doing)
Someone (I really am not going to search through to see who) said that when the Orion AGC was in the offposition, that it kept the same volume or something like that. This struck a chord with me...I thought that I remembered that AGC OFF in the Orion was not really AGC off. Sure enough! See these two posts from 2004 (one by K3 owner and enthusiast, contester extraordinaire, and Novice DXCC #1 owner [I think], W4ZV). http://lists.contesting.com/archives//html/TenTec/2004-02/msg00166.html http://lists.contesting.com/archives//html/TenTec/2004-02/msg00169.html When the AGC is really off, be prepared for high output audio blasts (except maybe with the new Elecraft limit function). de Doug KR2Q ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3: shift granularity: suggestion
Wayne said, We're planning to improve SHIFT granularity (etc.) in a future firmware release. I hope that this will be an added option in the CONFIG. menu. I like it the way it is now (fast)...at least for cw. I am really not looking forward to having to spin that tiny knob to move in 10hz steps. de Doug KR2Q ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] AC supply for KX-1
I'm looking for a very small, lightweight 110/220 supply for the KX-1. Suggestions? 73, Dave, W6AQ **A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/10075x1215855013x1201028747/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072%26hmpgID=62%26bcd=De cemailfooterNO62) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] FS: NIB K3 sub-receiver SOLD
Sub-receiver is sold. Thanks Dave - Original Message - From: N1IX To: elecraft@mailman.qth.net Sent: Tuesday, January 27, 2009 4:34 PM Subject: [Elecraft] FS: NIB K3 sub-receiver New in box, Opened only to read the manual. K3 sub-receiver module, only a few week old. No waiting. Shipped to your door via priority mail. $525 -- ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Beware! (Learn by doing?) :-)))
What's really fun is that you can adjust the AGC slope on the K3 in the config menu. In fact, if you do this while listening to a very strong signal, you can hear exactly what the AGC does to reduce the gain while you are making the adjustment.For this contest, I put in the maximum degree of attenuation, which helped control the strong signals. 73, Andy, AE6Y - Original Message - From: Darwin, Keith keith.dar...@goodrich.com To: Elecraft Reflector elecraft@mailman.qth.net Sent: Tuesday, January 27, 2009 12:57 PM Subject: Re: [Elecraft] Beware! (Learn by doing?) :-))) Call me dense, but I'm not understanding why one would expect that turning AGC off would NOT result in a huge jump in AF output. AGC turns down RX gain - a lot. The only time there should be no change in AF output is when the RF input is so low that it hasn't reached the AGC threshold. Maybe other manufactures have coupled AGC on/off with AF attenuation, so if the AGC is off, AF output is automatically reduced by 20 dB or something. For this very reason, I always run with AGC on. Even when I want the rig to act like it's off, I leave it on, set to Fast and then just turn the RF gain down to put my signal of interest down near the point where AGC is doing very little. AGC is still on to protect me in case some big signal QRM or QRN shows up. - Keith N1AS - - K3 711 - -Original Message- The TenTec Orion allowed the user to shutoff the AGC @ will and the resulting big difference in audio was NOT THERE! ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] OT: Orion AGC OFF (was learn by doing)
DOUGLAS ZWIEBEL wrote: Someone (I really am not going to search through to see who) said that when the Orion AGC was in the offposition, that it kept the same volume or something like that. This struck a chord with me...I thought that I remembered that AGC OFF in the Orion was not really AGC off. Sure enough! See these two posts from 2004 (one by K3 owner and enthusiast, contester extraordinaire, and Novice DXCC #1 owner [I think], W4ZV). http://lists.contesting.com/archives//html/TenTec/2004-02/msg00166.html http://lists.contesting.com/archives//html/TenTec/2004-02/msg00169.html When the AGC is really off, be prepared for high output audio blasts (except maybe with the new Elecraft limit function). Correct on all counts. Orion's AGC is never truly Off. Although the K3 has very similar hardware architecture to Orion, Lyle is doing something very different in his DSP code. I've asked him several times exactly how he achieves Off but he never responds, so I take it there must be something proprietary about it. I like the K3 implementation of AGC much better than Orion. I was always twiddling my Orion's AGC but just find I just set the K3 and never need to twiddle it (not **once** in 1651 QSOs on 160 this weekend with signals varying from S9+40 to noise floor). You're correct about the Novice DXCC also. For a trip down memory lane, there are a bunch of neat Novice stories on www.novice.bappy.com. Here's mine: http://www.novice.bappy.com/about_21.html 73, Bill -- View this message in context: http://n2.nabble.com/OT%3A-Orion-AGC-OFF-%28was-%22learn-by-doing%22%29-tp2229319p2229426.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] AC supply for KX-1
Please post on the list. I'm interested in this as well. Thanks. From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of dbellw...@aol.com Sent: Tuesday, January 27, 2009 4:42 PM To: elecraft@mailman.qth.net Subject: [Elecraft] AC supply for KX-1 I'm looking for a very small, lightweight 110/220 supply for the KX-1. Suggestions? 73, Dave, W6AQ mail.bullivant.com made the following annotations - Please be advised that, unless expressly stated otherwise, any U.S. federal tax advice contained in this e-mail, including attachments, is not intended to be used by any person for the purpose of avoiding any penalties that may be imposed by the Internal Revenue Service. * This e-mail is for the sole use of the intended recipient(s) and contains information belonging to Bullivant Houser Bailey, which is confidential and/or legally privileged. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or taking of any action in reliance on the contents of this e-mail information is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender by reply e-mail and destroy all copies of the original message. - ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] AC supply for KX-1
I apologize. I left off my name and call sign in the heat of the rush. 73 Russ Kd7mpk Please post on the list. I'm interested in this as well. Thanks. - mail.bullivant.com made the following annotations - Please be advised that, unless expressly stated otherwise, any U.S. federal tax advice contained in this e-mail, including attachments, is not intended to be used by any person for the purpose of avoiding any penalties that may be imposed by the Internal Revenue Service. * This e-mail is for the sole use of the intended recipient(s) and contains information belonging to Bullivant Houser Bailey, which is confidential and/or legally privileged. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or taking of any action in reliance on the contents of this e-mail information is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender by reply e-mail and destroy all copies of the original message. - ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New ECO- 12V sense mod-
As I'm catching up, they add a new one. http://www.elecraft.com/K3/mods/KPA3_12V_Sense_Modification_Rev_A.pdf So far my K3 turns off just fine, but I think I've got a 1N1418 around here. 73, doug ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
