[Elecraft] Nabble
Am I doing something wrong, or is there something wrong with the communication between this reflector and Nabble? I have thought for a while that this reflector was getting very quiet. As of this moment, Nabble is showing just one post for Jan 1, yet the qth.net archives for January 2011 are showing around 30. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://elecraft.365791.n2.nabble.com/Nabble-tp5879478p5879478.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Installing PR6 pre-amp inside the K3
Hello Group, There are some spare spaces inside the K3 body especially when we don't install the KRX3 or K144XV. Is there any possibility that the PR6 can be installed inside the K3 body? The existing arrangement of attaching the PR6 to KXV3A seems not tidy and not good for transportation. Any thought from the group or Elecraft? In fact, in the design of KPA500, is there anyway to incorporate the PR6 as well? I notice more 6m band opening now. It is not quite possible to bring my big Icoms for portable 6 m operation though those big Icoms have dedicated 6 m RX front end. cheers, Johnny VR2XMC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Nabble
seeing the same here Julian 73/HNY, Barry N1EU Julian, G4ILO wrote: As of this moment, Nabble is showing just one post for Jan 1, yet the qth.net archives for January 2011 are showing around 30. -- View this message in context: http://elecraft.365791.n2.nabble.com/Nabble-tp5879478p5879542.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3--CAT IS command will shift IF while in TX
I had noted the same problem with HRD but attributed it to HRD. I had not been playing with the IF shift, but did have some RF feedback problems that came from an USB dongle soundcard I was experimenting with. It also messed up some of my other settings, so I just reloaded a previous configuration I had saved with the utility. That took care of the problem and I didn't think about it again until I saw this post. Jim - W0EB I was asked by John, K0VET, to verify a behavior he observed last night on his K3. He was playing with HRD and found that by changing the IF Shift while transmitting that it took him off frequency. He demonstrated it for me and sure enough, his radio went off frequency (1.947 LSB). I fired up the K3 utility and issuing the following commands, IS 0500; and IS 1800; I was able to replicate the behavior on my K3. As soon as I stopped transmitting and transmitted again I was back on frequency even though the shift was still in effect on RX. So, what I surmise is that the IF shift is not locked out on the CAT port while transmitting. Both John and I have the latest 4.22 firmware loaded. The front panel Shift control does not exhibit this behavior. 73, de Nate N0NB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] CAL PLL on K2 gives bizarre result
Tony, I have never seen anything like that happen during CAL PLL, so all I can do is venture a guess -- Check the frequency of the VFO - and check the secondary menu D19 setting. D19 = y if you have the K60XV installed (or the rework eliminator equivalent for that option), otherwise the D19 parameter must be set to n. If this menu is set wrong, you will apparently hear things on 30 meters, but do not transmit - you will be transmitting outside the ham band. If D19 was set incorrectly during your CAL PLL run, you will have to run CAL PLL again to get the EEPROM contents correct. It could also be that something failed in the VFO circuit during the CAL PLL process, but that seems too coincidental to consider for the first pass analysis, 73, Don W3FPR On 1/1/2011 9:30 PM, Tony Estep wrote: I went through the dial calibration process with my K2 as outlined on Don's (W3FPR) web page. After adjusting C22 as called for, I ran CAL PLL. When it finished, the radio was in a frozen state from which I can't recover it. The only band that works is 30M, which seems normal. All the others can't receive or transmit. The S-Meter periodically flashes full-scale, and occasionally static crackles come from the speaker. The menu items are accessible and the filter and BFO settings seem intact. The radio was working normally when I started CAL PLL, and went into this state during the time CAL PLL was running. I was in the room with it typing on my computer, but not touching it. What happened?? Anybody have any idea?? Tony KT0NY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 HRD DM780 question with CW
Gents; I am able to get HRD DM780 to work together with my K3 for everythingexcept for CW. I can hear CW fine but it does not decode properly and I can not TX anything. I am using the HRD Beta 5 with the corrosponding DM780 software. When trying to TX for CW the TX led lights up but no output is taking place. I have experitmented with many menus and settings but I can not find the right menu combination. I know the line out and in for the sound card are fine as I can work RTTY and other modes with data-a. The rs232 is a usb to rs232 converter. Expect that there is just a setting problem in the K3, HRD or DM780. Any help from those who have set this up already would be appreciated. I do know that I do not have the side tone stuff correct yet, however, I need to get the connection working properly before I can figure that part out. Thanks Don KD8NNU __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Custom engraved P3 Plates
Ken did a great job on my new P3 front cover. The only thing that people need to know if they are installing this and didn't build the P3 is that the screws holding the front plate on are the only thing holding the main board into place. Simply take the top off and hold the board into place from the rear while removing the screws. Then you can set the new panel in place and replace the screws all in one operation. Don't forget to practice proper ESD techniques while performing this operation. Anyway you can see a picture that he's put on his site that I sent him... http://www.arkayengravers.com/elecraft/ ~Brett (N7MG) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2/K3: Keyboard to CW possible with KUSB and no computer?
Does the KUSB option allow you to connect a USB keyboard to the K3 (or K2 for that matter) and perform keyboard-to-CW without the aid of a PC inbetween? If not, would this be a relatively easy future enhancement to either rig? (I know there isn't much K2 development going on... just asking) I know USB doesn't often play well with CW timing, but maybe a buffer could help even at the cost of a slight delay from keypress to CW output. The benefits of being able to do keyboard CW without the PC involved are less power and noise, less equipment, more efficient, more portable... --Andrew, NV1B .. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2/K3: Keyboard to CW possible with KUSB and no computer?
No, the KUSB is just a USB to serial adapter. I would think adding that to the K3 would be some considerable effort and would guess many would not bother or would just use a PC for the purpose. I would expect there to be some kits around and they would probably have RS232 interfaces, so a KUSB would not be needed 73 de M0XDF, K3 #174, P3 #108 -- A good cook is like a sorceress who dispenses happiness. -Elsa Schiaparelli, fashion designer (1890-1973) On 2 Jan 2011, at 16:17, Andrew Moore wrote: Does the KUSB option allow you to connect a USB keyboard to the K3 (or K2 for that matter) and perform keyboard-to-CW without the aid of a PC inbetween? If not, would this be a relatively easy future enhancement to either rig? (I know there isn't much K2 development going on... just asking) I know USB doesn't often play well with CW timing, but maybe a buffer could help even at the cost of a slight delay from keypress to CW output. The benefits of being able to do keyboard CW without the PC involved are less power and noise, less equipment, more efficient, more portable... __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] kat2
Hello all, I just started the inventory of parts for my kat2 and all is going well until I got to the 102 caps. For the life of me I cannot determine the two smaller ones! I have lined them up with a ruler on a marble top table and looked at them from all angles. All 26 appear to be the same size. Any suggestions? Secondly, thetwo trimmer potentiometers are listed at 100k but 150k was shipped. A problem? 73 all Dan Daniel Grizzard Extra Class af4lb __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] kat2
A suggestion from QST I have used with success is to photograph the parts with a digital camera on it's highest resolution setting and enlarge them on the computer. Just be sure not to get too close or your lens may not be able to focus. If you have a macro setting, that can help too. Don't worry about being a foot or two away: modern cameras can make the tiniest part large. 73, Byron N6NUL On Sunday, January 2, 2011, Dan Grizzard af...@verizon.net wrote: Hello all, I just started the inventory of parts for my kat2 and all is going well until I got to the 102 caps. For the life of me I cannot determine the two smaller ones! I have lined them up with a ruler on a marble top table and looked at them from all angles. All 26 appear to be the same size. Any suggestions? -- - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Ham radio Radio deluxe et K3
Hello When Hamradio deluxe is connected to my K3, it works normally for 3 or 4 minutes, then gets stuck and refuses any operation ! Has anyone had this problem ? Any idea ? Hope you had a nice New Year's Day... Best regards Jacques de F9OJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] BNC adapter question
I mounted my 6m preamp (it is not the PR6) on the back of my K3/10 on the panel that normally has the fans for the KPA3. But I suspect that would work if you have a PR6 and K3/10. http://www.kl7uw.com/K3-ARR-6mPreamp.jpg 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-1.4kw*, 432-100w*, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubus...@hotmail.com == *temp not in service __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2/K3: Keyboard to CW possible with KUSB and no computer?
Andrew, Keyboard connectivity is not yet supported by the K3 however it has been mentioned by Elecraft to be on their wish list. In fact, the P3 has already been prepared with a cutout on the rear for a future USB port that hopefully will accommodate keyboard ops. For those without a P3 I'm not sure how Elecraft might offer keyboard connectivity and based upon my discussions with them I don't think they've ironed that out yet either but I am sure they're working on it. In time I'm sure they'll discuss it with us all when they're ready. Gary N6LRV -Original Message- Sent: Sunday, January 02, 2011 8:17 AM Subject: [Elecraft] K2/K3: Keyboard to CW possible with KUSB and no computer? Does the KUSB option allow you to connect a USB keyboard to the K3 (or K2 for that matter) and perform keyboard-to-CW without the aid of a PC inbetween? If not, would this be a relatively easy future enhancement to either rig? (I know there isn't much K2 development going on... just asking) I know USB doesn't often play well with CW timing, but maybe a buffer could help even at the cost of a slight delay from keypress to CW output. The benefits of being able to do keyboard CW without the PC involved are less power and noise, less equipment, more efficient, more portable... --Andrew, NV1B __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] BNC adapter question
Try Pasternack Enterprises. Here: http://www.pasternack.com/product-Adapter-BNC-Male-To-BNC-Male-Right-Angle-PE9758-72807.html matt W6NIA On Sat, 01 Jan 2011 17:47:53 -0800, you wrote: On 1/1/2011 3:09 PM, James C. Hall, MD wrote: I received the PR-6 6M preamp for Christmas. I have found that it eats up a lot of shelf space hanging in the back as it does. I thought it might work if I could flip it up, but I can't seem to find a BNC right angle M-M adapter. Does anyone know if these exist or have other ideas ? I guess I could make a couple small cables and slip it under the radio. Oh, they exist Doctor, and I have 2 or 3. Not new, but it will work. Address? I'll mail one to you on Monday. 73, Fred K6DGW - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Latest Sherwood table
happy new year, Wayne Burdick schrieb am 31 Dec 2010 um 17:26: On Dec 31, 2010, at 4:13 PM, Guy Olinger K2AV wrote: What gets me in a K3 is that there is still some room in there, even after installing the KRX3 to the 100W transceiver, to add something else. So far the possibilities haven't tickled my fancy. We're saving it for a fuel cell :) Wayne N6KR ooops -- I already filled half of the room with a pactor modem. What is the size of the fuel cell? 73! de Werner OE9FWV -- Driving People Insane: 9. Put your garbage can on your desk and label it IN Email powered by Pegasus Mail free at http://www.pmail.com Homepage: http://www.qsl.net/oe9fwv/ Fone +43 5522 75013 Fax +43 5522 22505 Mobile +43 664 6340014 Fax-Email Gateway +43 820 220262990 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 / KPA100: How to install chokes RFC6-7-8-9 near J8 ?
Hi, It appears to me that all the mini-chokes RFC6-7-8-9 supplied with the KPA100 kit is not yet small enough to fit into the outline on the PCB, as shown near J8 (the DB-9 connector). The assembly manual does not state anything about the assembly direction of these chokes, if or if not they may be installed upright instead of flat on the PCB - but it appears there may be room to do so. I'm worried that if i attempt to force them in lying flat, I will damage the chokes insulation or cause for an open joint. Any experience here from previous KPA100 builders - what to go for ? 73' Brian OZ2BRN K2 # 6936 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K3] KAT3 and 160 with 40m long doublet
I have only just recently added the KAT3 and I'm very impressed with it, but given the praise heaped upon it by others I'm slightly surprised that the best VSWR I can get on 160m is about 8:1. The antenna is approximately a doublet which is a half wave long on 80m I say 'approximately' as it's slightly off-centre fed. I have about 7m of 300 ohm slotted down from the feedpoint and then into a coaxial choke at roof level for the remaining 10m into the back of the K3. Substituting the straight connection for a 4:1 balun (Guanella) at the transition between the slotted feeder and the coax helps slightly but not by much. Unfortunately I don't have a vector analyser, so I have no idea of the nature of the reactance that the K3 is seeing. However, given the wavelength involved, I would need to add a very significant length of coaxial cable if I were to swing the point around the Smith Chart. I have tried to manually tune the KAT3, but unless I am missing something, I am am not able to change the L and C values at the same time as transmitting, so it's a very tedious process. Tomorrow I may well add some extra wire to hang vertically down from the ends of the doublet. In the meantime I would be pleased to hear any comments. Happy New Year! 73 Stephen, G4SJP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] BNC adapter question
I think the idea of a couple of short cables is better. It gives you flexibility of where to put the PR6, and I'll be putting mine under the rig (just far enough forward that the rig still sits on its feet). Using right angle connectors might make access to some of the other rear sockets impossible. John G4ZTR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Matt Zilmer Sent: 02 January 2011 18:13 To: k6...@foothill.net Cc: Elecraft Reflector Subject: Re: [Elecraft] BNC adapter question Try Pasternack Enterprises. Here: http://www.pasternack.com/product-Adapter-BNC-Male-To-BNC-Male-Right-Angle-P E9758-72807.html matt W6NIA On Sat, 01 Jan 2011 17:47:53 -0800, you wrote: On 1/1/2011 3:09 PM, James C. Hall, MD wrote: I received the PR-6 6M preamp for Christmas. I have found that it eats up a lot of shelf space hanging in the back as it does. I thought it might work if I could flip it up, but I can't seem to find a BNC right angle M-M adapter. Does anyone know if these exist or have other ideas ? I guess I could make a couple small cables and slip it under the radio. Oh, they exist Doctor, and I have 2 or 3. Not new, but it will work. Address? I'll mail one to you on Monday. 73, Fred K6DGW - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Information from ESET NOD32 Antivirus, version of virus signature database 5753 (20110102) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 5754 (20110102) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
Stephen, What is the SWR without the tuner ? 73 Ken K5DNL -- --- On Sun, 1/2/11, Stephen Prior s...@sjprior.fsnet.co.uk wrote: From: Stephen Prior s...@sjprior.fsnet.co.uk Subject: [Elecraft] [K3] KAT3 and 160 with 40m long doublet To: elecraft elecraft@mailman.qth.net Date: Sunday, January 2, 2011, 1:31 PM I have only just recently added the KAT3 and I'm very impressed with it, but given the praise heaped upon it by others I'm slightly surprised that the best VSWR I can get on 160m is about 8:1. The antenna is approximately a doublet which is a half wave long on 80m I say 'approximately' as it's slightly off-centre fed. I have about 7m of 300 ohm slotted down from the feedpoint and then into a coaxial choke at roof level for the remaining 10m into the back of the K3. Substituting the straight connection for a 4:1 balun (Guanella) at the transition between the slotted feeder and the coax helps slightly but not by much. Unfortunately I don't have a vector analyser, so I have no idea of the nature of the reactance that the K3 is seeing. However, given the wavelength involved, I would need to add a very significant length of coaxial cable if I were to swing the point around the Smith Chart. I have tried to manually tune the KAT3, but unless I am missing something, I am am not able to change the L and C values at the same time as transmitting, so it's a very tedious process. Tomorrow I may well add some extra wire to hang vertically down from the ends of the doublet. In the meantime I would be pleased to hear any comments. Happy New Year! 73 Stephen, G4SJP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
That is a really tough antenna to match for 160 Stephen. The classic way to use an 80 meter dipole on 160 is to short the feed line at a ground point and feed it with the center conductor with the braid to the best counter poise you can manage. This will make you a T topped Marconi which will probably tune for you. Willis 'Cookie' Cooke K5EWJ From: Stephen Prior s...@sjprior.fsnet.co.uk To: elecraft elecraft@mailman.qth.net Sent: Sun, January 2, 2011 1:31:06 PM Subject: [Elecraft] [K3] KAT3 and 160 with 40m long doublet I have only just recently added the KAT3 and I'm very impressed with it, but given the praise heaped upon it by others I'm slightly surprised that the best VSWR I can get on 160m is about 8:1. The antenna is approximately a doublet which is a half wave long on 80m I say 'approximately' as it's slightly off-centre fed. I have about 7m of 300 ohm slotted down from the feedpoint and then into a coaxial choke at roof level for the remaining 10m into the back of the K3. Substituting the straight connection for a 4:1 balun (Guanella) at the transition between the slotted feeder and the coax helps slightly but not by much. Unfortunately I don't have a vector analyser, so I have no idea of the nature of the reactance that the K3 is seeing. However, given the wavelength involved, I would need to add a very significant length of coaxial cable if I were to swing the point around the Smith Chart. I have tried to manually tune the KAT3, but unless I am missing something, I am am not able to change the L and C values at the same time as transmitting, so it's a very tedious process. Tomorrow I may well add some extra wire to hang vertically down from the ends of the doublet. In the meantime I would be pleased to hear any comments. Happy New Year! 73 Stephen, G4SJP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
On 1/2/2011 11:31 AM, Stephen Prior wrote: In the meantime I would be pleased to hear any comments. The condition you describe is not at all surprising for an antenna that's half the length it needs to be for an acceptable match. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 / KPA100: How to install chokes RFC6-7-8-9 near J8 ?
Brian, I believe this is addressed on the errata sheet (it used to be). Yes, you can install them upright or at an angle, or with both leads bent under the body to enable horizontal mounting - the choice will depend on your version of which is more aesthetically pleasing. 73, Don W3FPR On 1/2/2011 1:52 PM, OZ2BRN Brian Lodahl wrote: Hi, It appears to me that all the mini-chokes RFC6-7-8-9 supplied with the KPA100 kit is not yet small enough to fit into the outline on the PCB, as shown near J8 (the DB-9 connector). The assembly manual does not state anything about the assembly direction of these chokes, if or if not they may be installed upright instead of flat on the PCB - but it appears there may be room to do so. I'm worried that if i attempt to force them in lying flat, I will damage the chokes insulation or cause for an open joint. Any experience here from previous KPA100 builders - what to go for ? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Custom engraved P3 Plates
Does this P3 acrylic plate replace the actual original metal front plate? or is it an overlay of the original metal one? This might be just the trick to replace my metal face plate, Seems my paper thin, short, male fingernail tips, have already scratched off parts of the original lettering, above the 2nd, 3rd and 4th buttons (from the top). doesn't affect the way they work but it does look bad for an otherwise pristine rig. :-( http://picasaweb.google.com/k5oai.sam/P3#5557672746806494978 P.S. No I haven't discussed this with the folks @ Elecraft, I only noticed it a couple of days ago. Perhaps they would replace it, I can't really say if it is, due to a fault with the lettering, or just the way I hit the buttons? I don't know, just haven't had an opportunity to contact them yet. GB 73 K5OAI Sam Morgan On 1/2/2011 9:18 AM, Brett Howard wrote: Ken did a great job on my new P3 front cover. The only thing that people need to know if they are installing this and didn't build the P3 is that the screws holding the front plate on are the only thing holding the main board into place. Simply take the top off and hold the board into place from the rear while removing the screws. Then you can set the new panel in place and replace the screws all in one operation. Don't forget to practice proper ESD techniques while performing this operation. Anyway you can see a picture that he's put on his site that I sent him... http://www.arkayengravers.com/elecraft/ ~Brett (N7MG) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
I guess I feel rather foolish. Why I should have expected the KAT3 to cope I don't know, perhaps I have been swayed by the reports of others who have claimed that the KAT3 would load anything anywhere! I shall have to lengthen the antenna. I don't have a good enough ground to feed the antenna as a Marconi so my options other than lengthening the antenna are rather limited. I'm not limited by space so much as by a very convenient distance between two tall trees! 73 Stephen G4SJP Let us consider the topic closed! On 02/01/2011 19:51, Jim Brown j...@audiosystemsgroup.com wrote: On 1/2/2011 11:31 AM, Stephen Prior wrote: In the meantime I would be pleased to hear any comments. The condition you describe is not at all surprising for an antenna that's half the length it needs to be for an acceptable match. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 # 1264 with lots of options...for sale
How much should I charge? it's got the... K2 #1264 KPA100 SSB Side Band KNB Noise Blank KAF2 Audio Filter KATU 20 Watt Tuner KIOS RS 232 i/o KBT Battery option with Battery Just Came back from Don W tweeked and aligned. Phil Santa Fe Happy owner of a spanking new K3... but it needs options hence the need for cash to fund those options. Let me know __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
I used a low and bent doublet of 2 x 88ft per section for a while and it tuned up amazingly well on all bands 160 to 10 with the KAT3. As a rule I like to use multi-band doublets away from any obvious in-band resonances, so that it doesn't experience very high Z anywhere, so, adding a bit on each end and stringing them wherever they will sensibly go should work for you. A choke in the coax feed is good. David G3UNA I have only just recently added the KAT3 and I'm very impressed with it, but given the praise heaped upon it by others I'm slightly surprised that the best VSWR I can get on 160m is about 8:1. The antenna is approximately a doublet which is a half wave long on 80m I say 'approximately' as it's slightly off-centre fed. I have about 7m of 300 ohm slotted down from the feedpoint and then into a coaxial choke at roof level for the remaining 10m into the back of the K3. Substituting the straight connection for a 4:1 balun (Guanella) at the transition between the slotted feeder and the coax helps slightly but not by much. Tomorrow I may well add some extra wire to hang vertically down from the ends of the doublet. In the meantime I would be pleased to hear any comments. Happy New Year! 73 Stephen, G4SJP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] kat2
Dan, The trimmer pots are OK, use the 150k value. The capacitors are a different matter, there are two that must fit between the processor socket and the header to the L/C board. The .001 uF capacitors seem to have become fatter over the years due to manufacturing changes. Check to see if you have 2 extra .001 uF capacitors somewhere in the kit. As I recall, there were 2 disc ceramics in the last KAT2 kit I built (but then I may have pulled them out of my parts drawer, my memory can be fuzzy. There was a period of time when the errata sheet was included, but the parts ECO had not yet been updated. So if you purchased the kit a few months ago and are just now getting around to building it, you may indeed have those capacitors missing - if so, contact pa...@elecraft.com. Explain carefully so that you receive the thin capacitors There is no part number given in the errata sheet, but I know PN E530072 will work just fine even if you have to form the leads for the wider spacing. 73, Don W3FPR On 1/2/2011 11:58 AM, Dan Grizzard wrote: Hello all, I just started the inventory of parts for my kat2 and all is going well until I got to the 102 caps. For the life of me I cannot determine the two smaller ones! I have lined them up with a ruler on a marble top table and looked at them from all angles. All 26 appear to be the same size. Any suggestions? Secondly, thetwo trimmer potentiometers are listed at 100k but 150k was shipped. A problem? 73 all Dan Daniel Grizzard Extra Class af4lb __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2/K3: Keyboard to CW possible with KUSB and no computer?
Keyboard connectivity is not yet supported by the K3 however it has been mentioned by Elecraft to be on their wish list. I think a good solution in the meantime is to resurrect this K1EL K40, strip it down to the bare minimum (the keyer board, and ditch the display) and mount it inside a small PS/2 keyboard. Warming up the soldering iron...! 73, --Andrew, NV1B __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 losing RF
Paul, look for voltage drop at the power poles. Solder or crimping is critical and proper assembly is as well. A fraction of an ohm will cause an unworkable voltage drop. Look at the internal volt meter on the K3 display to identify excess voltage drop at the connection. Willis 'Cookie' Cooke K5EWJ From: Paul Ormandy ZL4PW zl...@orcon.net.nz To: elecraft@mailman.qth.net Sent: Sat, January 1, 2011 11:22:39 PM Subject: [Elecraft] K3 losing RF Hi all, My K3 has developed a problem... Power output is down to 70W and the LCD back-light flickers on tx. The Low Voltage message flicked up briefly once. I suspect a DC power problem but so saying, the voltage at the rig is 13.9V on transmit at 70W and the rig is drawing 13A. The problem seems worse on the 6mb. If I reduce the output RF control to around 60W, there is no perceptible LCD flickering. I will obtain another 20A power supply tomorrow and see if the problem persists. In the mean time, (apart from running low power), can anyone suggest what I should start looking for internally? Kind regards, Paul -- Paul Ormandy ZL4PW ZM4M www.radiodx.com www.zl4pw.orcon.net.nz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 #1264 with a bunch of options for sale.
How much should I charge? it's got the... K2 #1264 KPA100 SSB Side Band KNB Noise Blank KAF2 Audio Filter KATU 20 Watt Tuner KIOS RS 232 i/o KBT Battery option with Battery Just Came back from Don W tweeked and aligned. Phil Santa Fe Happy owner of a spanking new K3... but it needs options hence the need for cash to fund those options. Let me know __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
That's not correct. I use a 40.8 m long windom and it's no problem to tune to a swr abt. 1.2 with the KAT3 on the 160m band. 73 Detlef, DL7NDF Am 02.01.2011 20:51, schrieb Jim Brown: On 1/2/2011 11:31 AM, Stephen Prior wrote: In the meantime I would be pleased to hear any comments. The condition you describe is not at all surprising for an antenna that's half the length it needs to be for an acceptable match. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
On 1/2/2011 12:03 PM, Stephen Prior wrote: I don't have a good enough ground to feed the antenna as a Marconi so my options other than lengthening the antenna are rather limited. Don't give up so easily. In Chicago, I used a big wrought iron fence plus a dozen or so 30 ft long wires as counterpoise for a Marconi; KK9H has used the HVAC ducts in his home. ANY counterpoise is better than NO counterpoise. In another installation, I've run as many fairly short wires as I could from the base of the antenna, connected them together, and to the coax shield. Was it as good as 70 quarter-wave radials? Of course not. Did the antenna work well enough for me to have a lot of fun? Yup! My Marconi was a 100 ft long center-fed dipole with loading coils to resonate it on 80M. Just for fun, I tried loading it as a dipole on 160. Performance was wretched. Using it as a Marconi gave me signal reports at least 10dB better. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 losing RF - problem solved
Hi all, I was less flustered today and did some more checking... Discovered the main fuse in the negative supply line from the PSU had blown. I would like to know what reason it could have blown and at this point, presume it was something to do with running 100W on 6M. Thanks to all who e-mailed directly with suggestions. Cheers, Paul *From:* Paul Ormandy ZL4PW zl...@orcon.net.nz *To:* elecraft@mailman.qth.net *Sent:* Sat, January 1, 2011 11:22:39 PM *Subject:* [Elecraft] K3 losing RF Hi all, My K3 has developed a problem... Power output is down to 70W and the LCD back-light flickers on tx. The Low Voltage message flicked up briefly once. I suspect a DC power problem but so saying, the voltage at the rig is 13.9V on transmit at 70W and the rig is drawing 13A. The problem seems worse on the 6mb. If I reduce the output RF control to around 60W, there is no perceptible LCD flickering. I will obtain another 20A power supply tomorrow and see if the problem persists. In the mean time, (apart from running low power), can anyone suggest what I should start looking for internally? Kind regards, Paul -- Paul Ormandy ZL4PW ZM4M www.radiodx.com http://www.radiodx.com/ www.zl4pw.orcon.net.nz http://www.zl4pw.orcon.net.nz/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- Paul Ormandy ZL4PW ZM4M www.radiodx.com www.zl4pw.orcon.net.nz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Elecraft Paint
Please don't flame me ... but Sam's comment about some wear in the paint of his P3 got me to thinking. Whenever someone asks me how I like my K3 (which happens a lot!) I deliver a 10 minute commercial and then pause for a moment in deep thought and (weakly, and by way of emphasizing the positives I had just mentioned) say that the only nit pic I have is with the paint. That always gets a laugh. It's true, though. My K2 and now my K3 have numerous little dings due to very minor mishaps that would never have chipped the typical hard enamel on any of my other equipment. I've often wondered why such beautifully engineered gear has such fragile paint. Sam Morgan had said: __ Seems my paper thin, short, male fingernail tips, have already scratched off parts of the original lettering, above the 2nd, 3rd and 4th buttons (from the top). doesn't affect __ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Elecraft Paint
Is there a good paint that is legal out there. Even the powder coated stuff here does not hold up very good. My PFR-3 was the best ever. It took a real beating and still looked new. The environmental people make it tough to make really good paints. That's my opinion. 73 George/W2BPI __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
Jim, a large iron deposit lies north and west of Chicago, so verticals work very well in many areas around Chicago. I live on the Texas Gulf Coast which is salt laden gumbo from an ancient sea and verticals work very well here. I don't know about Stephen's area of the UK, but I will easily accept his experience that verticals don't work well there. Willis 'Cookie' Cooke K5EWJ From: Jim Brown j...@audiosystemsgroup.com To: elecraft@mailman.qth.net Sent: Sun, January 2, 2011 3:42:12 PM Subject: Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet On 1/2/2011 12:03 PM, Stephen Prior wrote: I don't have a good enough ground to feed the antenna as a Marconi so my options other than lengthening the antenna are rather limited. Don't give up so easily. In Chicago, I used a big wrought iron fence plus a dozen or so 30 ft long wires as counterpoise for a Marconi; KK9H has used the HVAC ducts in his home. ANY counterpoise is better than NO counterpoise. In another installation, I've run as many fairly short wires as I could from the base of the antenna, connected them together, and to the coax shield. Was it as good as 70 quarter-wave radials? Of course not. Did the antenna work well enough for me to have a lot of fun? Yup! My Marconi was a 100 ft long center-fed dipole with loading coils to resonate it on 80M. Just for fun, I tried loading it as a dipole on 160. Performance was wretched. Using it as a Marconi gave me signal reports at least 10dB better. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Elecraft Paint
Don't know if this would work. But noticed the outside doors on our new home seem to be painted with some really tough stuff. Asked the contractor what he had used and was told he had taken the doors to an auto body repair shop in town and had them finished with auto body paint and finish. They may know something we don't. Happy New Years to all. 73 Bob W7AVK k3/100 kit s/n 4365 On 1/2/2011 2:08 PM, w2b...@aol.com wrote: Is there a good paint that is legal out there. Even the powder coated stuff here does not hold up very good. My PFR-3 was the best ever. It took a real beating and still looked new. The environmental people make it tough to make really good paints. That's my opinion. 73 George/W2BPI . __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2/K3: Keyboard to CW possible with KUSB and no computer?
Take a look at www.K1EL.com, he has a number of keyers that should work just fine with any Elecraft rig. I have a K40, now obsolete and replaced by the K42, since arthritis left me unable to use a bug or paddle and can vouch for its effectiveness on both K2 and K3. 73 HNY all. Dave G3TJP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
On Sun, Jan 2, 2011 at 3:18 PM, Dr. Detlef Petrausch dl7...@t-online.dewrote: I use a 40.8 m long windom and it's no problem to tune to a swr abt. 1.2 with the KAT3 on the 160m band Yep, similar results here. I have used 7 different ATUs and the KAT3 is the best by far. The antenna can be way shorter than 1/2 wave and still tune up fine. No loading scheme is needed. A short antenna just presents a capacitive reactance (a -j value) to the tuner, which in my experience the KAT3 has always been able to deal with. According to my antenna analyzer, on some frequencies my antennas present reactive loads that put an SWR on the coax up to about 20:1. But I have only a short run of coax between balun and transmitter, so the loss is low. However, when the load presents a lot of reactance, I have found that it has been helpful in certain antenna setups to have a good counterpoise arrangement where the balanced feedline comes into the shack and goes into the balun. The counterpoise doesn't have to be resonant, nor does it need to be elaborate. Tony KT0NY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Nabble
I'm wondering if there is a connection between that and Nabble saying that our messages have not been accepted by the list yet. I'm also surprised no-one else has noticed. Perhaps we are the only two people who use Nabble? Barry N1EU wrote: seeing the same here Julian 73/HNY, Barry N1EU Julian, G4ILO wrote: As of this moment, Nabble is showing just one post for Jan 1, yet the qth.net archives for January 2011 are showing around 30. - Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html -- View this message in context: http://elecraft.365791.n2.nabble.com/Nabble-tp5879478p5880056.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
It's very patchy: there are areas of huge clay deposits stretching for miles and very deep; I've forgotten the geological term for it, but I understand it was pushed into place by the last ice age; good for low loss low angle radiation I understand. There are also large areas of sand stone which is pretty hopeless for anything radio they tell me. Looking at the geology around Stephen I'd say it wasn't too good, however the sea isn't far away so the take off to the States is quite good if the immediate area around the antenna could be made efficient. Isn't the internet wonderful? David G3UNA I don't know about Stephen's area of the UK, but I will easily accept his experience that verticals don't work well there. Willis 'Cookie' Cooke __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Elecraft Paint
Most bicycles are now powder coated. Seems to be tough stuff. David K0LUM At 2:21 PM -0800 1/2/11, Bob W7AVK wrote: Don't know if this would work. But noticed the outside doors on our new home seem to be painted with some really tough stuff. Asked the contractor what he had used and was told he had taken the doors to an auto body repair shop in town and had them finished with auto body paint and finish. They may know something we don't. Happy New Years to all. 73 Bob W7AVK k3/100 kit s/n 4365 On 1/2/2011 2:08 PM, w2b...@aol.com wrote: Is there a good paint that is legal out there. Even the powder coated stuff here does not hold up very good. My PFR-3 was the best ever. It took a real beating and still looked new. The environmental people make it tough to make really good paints. That's my opinion. 73 George/W2BPI . __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
The real issue with verticals over bad ground of that sort is to couple as little of it as possible. There is good evidence that DENSE elevated radials are effective over really bad earth. Since dense and elevated coupled together can easily be one of those easy-to-say-and-don't-dare-do situations practically, the possibility may make little difference. 73, Guy. On Sun, Jan 2, 2011 at 6:07 PM, David Cutter d.cut...@ntlworld.com wrote: It's very patchy: there are areas of huge clay deposits stretching for miles and very deep; I've forgotten the geological term for it, but I understand it was pushed into place by the last ice age; good for low loss low angle radiation I understand. There are also large areas of sand stone which is pretty hopeless for anything radio they tell me. Looking at the geology around Stephen I'd say it wasn't too good, however the sea isn't far away so the take off to the States is quite good if the immediate area around the antenna could be made efficient. Isn't the internet wonderful? David G3UNA I don't know about Stephen's area of the UK, but I will easily accept his experience that verticals don't work well there. Willis 'Cookie' Cooke __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
The length of the radiator is only half the story. Unless the feedline is matched to the impedance at the antenna feedpoint, there will be SWR on the transmission line. When there is SWR on the transmission line, the type of line and its length become important when comparing whether any given antenna will work the same as any other antenna of the same length. So if you do not state the type and length of your feedline, it is like comparing apples to oranges. If you do not understand this phenomenon, take a look at the Antenna, Transmission Line, Tuner article on y website www.w3fpr.com. *If* it just so happens that the KAT3 cannot tune a particular antenna, then the impedance in the shack may be very low or very high (out of the range of the tuner). Adding or subtracting a 1/8 wavelength of feedline will often bring it into range, and that is normally the easiest solution if the only thing you are considering is the ability of the tuner to produce a match. 73, Don w3FPR On 1/2/2011 5:39 PM, Tony Estep wrote: On Sun, Jan 2, 2011 at 3:18 PM, Dr. Detlef Petrauschdl7...@t-online.dewrote: I use a 40.8 m long windom and it's no problem to tune to a swr abt. 1.2 with the KAT3 on the 160m band Yep, similar results here. I have used 7 different ATUs and the KAT3 is the best by far. The antenna can be way shorter than 1/2 wave and still tune up fine. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Custom engraved P3 Plates
on off list comment told me the clear acrylic is on the front of the display but outside of the metal face I think that explains it all I have that clear panel under rather than over the front panel ie.. the difference in the depth of the buttons exposure I figured as much, can you say op error? I can big_grin GB 73 K5OAI Sam Morgan On 1/2/2011 1:54 PM, Sam Morgan wrote: Does this P3 acrylic plate replace the actual original metal front plate? or is it an overlay of the original metal one? This might be just the trick to replace my metal face plate, Seems my paper thin, short, male fingernail tips, have already scratched off parts of the original lettering, above the 2nd, 3rd and 4th buttons (from the top). doesn't affect the way they work but it does look bad for an otherwise pristine rig. :-( http://picasaweb.google.com/k5oai.sam/P3#5557672746806494978 P.S. No I haven't discussed this with the folks @ Elecraft, I only noticed it a couple of days ago. Perhaps they would replace it, I can't really say if it is, due to a fault with the lettering, or just the way I hit the buttons? I don't know, just haven't had an opportunity to contact them yet. GB 73 K5OAI Sam Morgan On 1/2/2011 9:18 AM, Brett Howard wrote: Ken did a great job on my new P3 front cover. The only thing that people need to know if they are installing this and didn't build the P3 is that the screws holding the front plate on are the only thing holding the main board into place. Simply take the top off and hold the board into place from the rear while removing the screws. Then you can set the new panel in place and replace the screws all in one operation. Don't forget to practice proper ESD techniques while performing this operation. Anyway you can see a picture that he's put on his site that I sent him... http://www.arkayengravers.com/elecraft/ ~Brett (N7MG) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Nabble
For some days, I have felt like the postings on Nabble are long delayed. I receive the digest emails but prefer to read postings on line. I look at the list of subjects in the digest and then try to find them on Nabble. That used to work fine for me, but now I end up having to look through the digest since I can't find the postings on Nabble until much later. I have also noticed the have not been accepted messages for somewhile now on some postings. That certainly seems strange. Chuck, W5UXH Las Cruces, NM Julian, G4ILO wrote: I'm wondering if there is a connection between that and Nabble saying that our messages have not been accepted by the list yet. I'm also surprised no-one else has noticed. Perhaps we are the only two people who use Nabble? -- View this message in context: http://elecraft.365791.n2.nabble.com/Nabble-tp5879478p5880229.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Nabble
I'll be a cookie or some other parameter expired 12/31/10. I noticed this was also a problem on a couple of web BBS's I visit - they lost the personalization/password info until the sysop reset the expiration date. Barry W2UP -- Barry Kutner, W2UP Lakewood, CO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
Even if you can tune a 40m wire on 160, that doesn't mean it will work well. In my experience, short wires for the low bands are an exercise in futility. Barry W2UP -- Barry Kutner, W2UP Lakewood, CO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] FORSALE: LP-PAn
I have a new factory assembled LP-Pan with built in preamp for use with the K3. Also a nearly new E-MU 0202 Sound card and all connecting cables to plug and play with your K3. $280 firm...shipped CONUS only. k1uo (at) arrl.net -- View this message in context: http://elecraft.365791.n2.nabble.com/FORSALE-LP-PAn-tp5880273p5880273.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Elecraft SSB Net results (1-2-11)
We had a difficult net today. Propagation didn't seem that great, and we were bothered quite a bit by QRM from 14.313 MHz. After a few minutes, we QSYed to 14.315 MHz to get away from the QRM, but it was still a problem. As it was, we had 15 participants over a 20 minute period. Thanks to everyone who checked in. Ken, KO5Y, in NM will be the NCS next week. Happy New Year. Here is a list of the participants: Station NameQTH Rig S/N K6EQRoger CA K3 4629 K4TMCaryVA K3 3448 W0FMTerry MO K3 474 KO5YKen NM K3 4442 W4RKS Jim AL K3 3618 K0JWC Jim MN K3 3447 K4GCJ Gerry NC K3 1597 KD1TH PaulNH K3 4882 N9EFRobert IL K3 4411 W5ETJ GaryTX K3 3227 W8YMO Harry OH K3 166 AC0NM Glenn CA K3 2843 K8EAG Gil MI K3 99 ZL1PWD Peter NZ K3 139 NS7PPhilOR K3 1826 73, Phil, NS7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Custom engraved P3 Plates
awesome, 1st op error correction for 2011 went rather painlessly P3 buttons are so much more of a pleasure to use this way, definatly end of thread from my end, need to play with my new buttons, hi hi GB 73 K5OAI Sam Morgan On 1/2/2011 6:32 PM, Sam Morgan wrote: on off list comment told me the clear acrylic is on the front of the display but outside of the metal face I think that explains it all I have that clear panel under rather than over the front panel ie.. the difference in the depth of the buttons exposure I figured as much, can you say op error? I can big_grin GB 73 K5OAI Sam Morgan On 1/2/2011 1:54 PM, Sam Morgan wrote: Does this P3 acrylic plate replace the actual original metal front plate? or is it an overlay of the original metal one? This might be just the trick to replace my metal face plate, Seems my paper thin, short, male fingernail tips, have already scratched off parts of the original lettering, above the 2nd, 3rd and 4th buttons (from the top). doesn't affect the way they work but it does look bad for an otherwise pristine rig. :-( http://picasaweb.google.com/k5oai.sam/P3#5557672746806494978 P.S. No I haven't discussed this with the folks @ Elecraft, I only noticed it a couple of days ago. Perhaps they would replace it, I can't really say if it is, due to a fault with the lettering, or just the way I hit the buttons? I don't know, just haven't had an opportunity to contact them yet. GB 73 K5OAI Sam Morgan On 1/2/2011 9:18 AM, Brett Howard wrote: Ken did a great job on my new P3 front cover. The only thing that people need to know if they are installing this and didn't build the P3 is that the screws holding the front plate on are the only thing holding the main board into place. Simply take the top off and hold the board into place from the rear while removing the screws. Then you can set the new panel in place and replace the screws all in one operation. Don't forget to practice proper ESD techniques while performing this operation. Anyway you can see a picture that he's put on his site that I sent him... http://www.arkayengravers.com/elecraft/ ~Brett (N7MG) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
On Jan 2, 2011, at 4:01 PM, Don Wilhelm wrote: Adding or subtracting a 1/8 wavelength of feedline will often bring it into range, and that is normally the easiest solution if the only thing you are considering is the ability of the tuner to produce a match. You can see what Don means by taking a look at this figure (KAT3 at 1.8 MHz, with Smith Chart centered at 50+i0 ohms): http://homepage.mac.com/chen/Technical/Tuner/tuner1.8.png Each point on the Smith Chart is a point that the KAT3 can be brought to an precise SWR of 1.0:1. The blue points are for the KAT3 cap on one side of the inductor and the green points are for the cap switch to the other end of the inductor (the KAT3 is an L tuner, with a relay K17, that switches the caps to one or the other side of the inductor). The center of the Smith Chart circle represents an antenna with an SWR of 1.0:1. As you go out towards the circumference, you have growing circles with the same centers, with ever increasing SWR. Notice (as Don mentioned) that when the SRW is large (towards the circumference of the Smith Chart), there are huge swaths of empty spots in the Smith Chart. These are terminations that the KAT3 can never bring to an SWR of 1.0:1. However (again, as Don mentioned), there are large areas beyond the blue region where you can rotate yourself along on a constant SWR circle and drop yourself right into where the dense green dots are! Voila, ability to tune to an SWR of 1.0:1 while you could not do so without rotating. How do you rotate yourself? A length of transmission line, of course! If you remember your transmission line theory, adding a transmission line will move you along a constant radius circle centered at SWR = 1.0:1. The 1/8 wavelength that Don mentioned will rotate you by 90 degrees. In the case of the K3, you may have to try everything up to about 3/4 of a wavelength since the green and blue parts are not symmetrical. (Yes, 3/4 wavelength at 160m is no fun :-). By the way, if you look carefully, there are SWR values outside of the blue-green Yin-Yang looking region, that are not occupied. I.e., there *will* be antennas that you will never be able to tune even if you try different transmission lines until you are blue in the face. But this plot (again, with reference center at 50 ohms) should quickly tell you which antenna is tunable at 1.8 MHz. If you want to look at the full resolution PDF of the above plot (warning: 9.4 MB), you can use this link: http://homepage.mac.com/chen/Technical/Tuner/tuner1.8.pdf The points are computed by using the capacitor and inductor values of the KAT3. The KAT-100 uses slightly different L and C -- if you are interested in seeing how that tuner works, and can run Xcode on a Mac, I am more than glad to send you the source code that you can modify to produce the PDF chart for a KAT100. The interesting thing about the KAT3 is that as you go up in frequency, the dots become sparser, but do cover the most of the Smith Chart circle out to very high SWR circles. That means that as you go up in frequency, you might not be able to tune to exactly SWR 1.0:1 but you can get close enough that it should not be a problem to tune any load well enough practically. For example, the KAT3 looks like this on 20m: http://homepage.mac.com/chen/Technical/Tuner/T14080.jpg Again, if you have Xcode loaded on your Mac (Xcode is on every Mac OS X Installer DVD, but you have to ask for it to be installed), I will be glad to send you the Xcode project so you can generate plots for any frequency that you wish. Vy 73 Chen, W7AY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
On Jan 2, 2011, at 5:52 PM, Kok Chen wrote: You can see what Don means by taking a look at this figure (KAT3 at 1.8 MHz, with Smith Chart centered at 50+i0 ohms): http://homepage.mac.com/chen/Technical/Tuner/tuner1.8.png I should add that, if memory serves (it has been a while ago that I wrote the program), the blue and green points are what an SWR 1.0:1 is transformed to by the KAT3. An antenna that will produce a match is actually the complex conjugate of one of the blue or green points (easy to figure out on the Smith Chart). 73 Chen, W7AY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] For Sale... K2 with lots of options
$1100... plus you pay shipping... Here is what you get K2 #1264 KPA100 SSB Side Band KNB Noise Blank KAF2 Audio Filter KATU 20 Watt Tuner KIOS RS 232 i/o KBT Battery option with Battery All up graded to current versions. Paypal cool. This radio was just worked over by Don W... so it all up to snuff. email me philji at mac dot com Phil Santa Fe , NM I am the very happy owner of a brand new K3 and it needs options hence the sale of the K2. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
On Jan 2, 2011, at 5:52 PM, Kok Chen wrote: In the case of the K3, you may have to try everything up to about 3/4 of a wavelength since the green and blue parts are not symmetrical. (Yes, 3/4 wavelength at 160m is no fun :-). My mistake, that should be everything up to 3/8 of a wavelength Sorry -- brain shorted to ground; aftereffects of champagne. 1/2 a wavelength will rotate you completely through 360 degrees. 73 Chen, W7AY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
On 1/2/2011 2:39 PM, Tony Estep wrote: A short antenna just presents a capacitive reactance (a -j value) to the tuner, which in my experience the KAT3 has always been able to deal with. Well ... I think it sort of depends on the antenna and the length of the feedline if it's surge impedance isn't matched to the antenna feedpoint. Short Marconi-T's and Inv-L's typically will have some inductive reactance when fed at the bottom, hence the usual series cap. And, what Z appears at the TX end of the coax depends both on the mismatch at the feedpoint, and the length of the coax. W3FPR has suggested multiple times that, if all you're looking for is a match by the KAT3 so your K3 will be happy and exude power, try adding 1/8 wave of coax to the line. Of course, just getting a KAT3 match doesn't mean you're getting a lot of power into a short antenna or that it will radiate [or receive] well. I guess there's a reason why those old coastal marine stations had such huge antennas :-) 73, Fred K6DGW - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
Chen Thanks for that supporting addition, and for your work on the Smith Chart showing the KAT3 matching range for 160 meters. It is all a matter of the physics of the situation. As you mentioned, the matching range of the KAT3 becomes greater as the frequency is increased. That fact is often overlooked by many hams. It is all about the amount of L and C available in the tuner, but the inductive or capacitive reactance is really what counts in producing the match. If the feedpoint in the shack has 1000 ohms of inductive reactance, and the tuner has only 600 ohms capacitive reactance to attempt to cancel that inductance, then a match will never happen. For a given L, the reactance increases with frequency, and with a given C, the reactance decreases with frequency. That can be easily seen from the formulas for inductive and capacitive reactance - for inductance, the f: term is a multiplier, and for capacitors, it is a divisor. The limiting factor for L-network tuners is usually the largest inductance available. The capacitive component is not normally the limiting factor because that can be made quite small (high reactance). The KAT3 (and KAT100 and KAT2, and KAT1 and KXAT1) uses an L-match tuning section. The required L and C values can easily be computed using the standard formulas for an L-matching section. If the L and C values required are greater than that available in the tuner, you have exceeded the range of the tuner. Instead of adding additional feedline, it is also possible to add parallel or series capacity or inductance at the feedline connection point to bring things into a tunable range. For those who want to pursue the fine points, study a bit about L-networks and conjugate matching. 73, Don W3FPR On 1/2/2011 8:52 PM, Kok Chen wrote: On Jan 2, 2011, at 4:01 PM, Don Wilhelm wrote: Adding or subtracting a 1/8 wavelength of feedline will often bring it into range, and that is normally the easiest solution if the only thing you are considering is the ability of the tuner to produce a match. You can see what Don means by taking a look at this figure (KAT3 at 1.8 MHz, with Smith Chart centered at 50+i0 ohms): http://homepage.mac.com/chen/Technical/Tuner/tuner1.8.png Each point on the Smith Chart is a point that the KAT3 can be brought to an precise SWR of 1.0:1. The blue points are for the KAT3 cap on one side of the inductor and the green points are for the cap switch to the other end of the inductor (the KAT3 is an L tuner, with a relay K17, that switches the caps to one or the other side of the inductor). The center of the Smith Chart circle represents an antenna with an SWR of 1.0:1. As you go out towards the circumference, you have growing circles with the same centers, with ever increasing SWR. Notice (as Don mentioned) that when the SRW is large (towards the circumference of the Smith Chart), there are huge swaths of empty spots in the Smith Chart. These are terminations that the KAT3 can never bring to an SWR of 1.0:1. However (again, as Don mentioned), there are large areas beyond the blue region where you can rotate yourself along on a constant SWR circle and drop yourself right into where the dense green dots are! Voila, ability to tune to an SWR of 1.0:1 while you could not do so without rotating. How do you rotate yourself? A length of transmission line, of course! If you remember your transmission line theory, adding a transmission line will move you along a constant radius circle centered at SWR = 1.0:1. The 1/8 wavelength that Don mentioned will rotate you by 90 degrees. In the case of the K3, you may have to try everything up to about 3/4 of a wavelength since the green and blue parts are not symmetrical. (Yes, 3/4 wavelength at 160m is no fun :-). By the way, if you look carefully, there are SWR values outside of the blue-green Yin-Yang looking region, that are not occupied. I.e., there *will* be antennas that you will never be able to tune even if you try different transmission lines until you are blue in the face. But this plot (again, with reference center at 50 ohms) should quickly tell you which antenna is tunable at 1.8 MHz. If you want to look at the full resolution PDF of the above plot (warning: 9.4 MB), you can use this link: http://homepage.mac.com/chen/Technical/Tuner/tuner1.8.pdf The points are computed by using the capacitor and inductor values of the KAT3. The KAT-100 uses slightly different L and C -- if you are interested in seeing how that tuner works, and can run Xcode on a Mac, I am more than glad to send you the source code that you can modify to produce the PDF chart for a KAT100. The interesting thing about the KAT3 is that as you go up in frequency, the dots become sparser, but do cover the most of the Smith Chart circle out to very high SWR circles. That means that as you go up in frequency, you might not be able
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
Don't you mean to the transmission line? A quarter-wavelength line between the antenna and tuner makes that -j into a +j. Wes N7WS --- On Sun, 1/2/11, Tony Estep estept...@gmail.com wrote: The antenna can be way shorter than 1/2 wave and still tune up fine. No loading scheme is needed. A short antenna just presents a capacitive reactance (a -j value) to the tuner,. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
Sort of sounds logical but it's wrong. Let the load in the shack be 50 +j1000. A low-pass L-net with a shunt Xc = -j501 and series Xl = j1000 will do it. Wes N7WS --- On Sun, 1/2/11, Don Wilhelm w3...@embarqmail.com wrote: As you mentioned, the matching range of the KAT3 becomes greater as the frequency is increased. That fact is often overlooked by many hams. It is all about the amount of L and C available in the tuner, but the inductive or capacitive reactance is really what counts in producing the match. If the feedpoint in the shack has 1000 ohms of inductive reactance, and the tuner has only 600 ohms capacitive reactance to attempt to cancel that inductance, then a match will never happen. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 CW and RTTY tones
Dear All, When operating CW or Rtty there is a split tone that you have to know about. I have been reading on the HRD forums to figure this out to get the software set up correctly. I know it has something to do with carrier supression, but it just does not make sense to me. So the more I read there the more confused I become. I have also tried google searches but I still have not figured it out yet. So if someone can direct me to some reading sources to help me understand this I would really appreciate it. Thanks Don KD8NNU __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] AF-1: First Impressions
Happy New Year Everyone! I started and finished my AF-1 this evening. It was an easy build; I was finished in a few hours. The tests worked out OK and I have been enjoying tuning around on my K2 to see what it will do for me. At first, it didn't seem to do much. Then I started to get the hang of tweaking the controls and now I'm very happy! I haven't had a chance to use it in crowded band conditions...maybe some morning soon on 20m. It does help bring the weak ones out of the mud though. More as I get a chance to work with it further. Tomorrow's the first day back to work after the holiday, so now it's time for bed! 73, Ken Alexander VE3HLS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] KAT3 and 160 with 40m long doublet
Wes, I don't know about the -j501, but Kirchoff tells me that a series Xl = j1000 alone will cancel the +j1000 in the shack feedpoint (your example) leaving a 50 ohms pure resistive load, no need for the shunt element. Since the absolute value of the Low Pass L-net impedance requires that Rl be less than Rs, I do not know how a Low Pass section would provide a match. The matching section must be a High Pass with your values. 73, Don W3FPR On 1/2/2011 10:22 PM, Wes Stewart wrote: Sort of sounds logical but it's wrong. Let the load in the shack be 50 +j1000. A low-pass L-net with a shunt Xc = -j501 and series Xl = j1000 will do it. Wes N7WS --- On Sun, 1/2/11, Don Wilhelmw3...@embarqmail.com wrote: As you mentioned, the matching range of the KAT3 becomes greater as the frequency is increased. That fact is often overlooked by many hams. It is all about the amount of L and C available in the tuner, but the inductive or capacitive reactance is really what counts in producing the match. If the feedpoint in the shack has 1000 ohms of inductive reactance, and the tuner has only 600 ohms capacitive reactance to attempt to cancel that inductance, then a match will never happen. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Elecraft CW Net Report for January 2nd 3rd, 2011
Good Evening, There was quite a difference between twenty and forty meters today. Both were rather long but twenty was crystal clear. Copy was easy and pleasant. Forty meters was noisy with a lot of fading. It took three tries to get a couple of you. Two new operators but neither of them was strong enough to get their full details. Hopefully they will return under better conditions. But, I have hope that signals will only get better. N0AR has been trying patiently to get in on forty meters and today was one of those times where I could hear most of what he sent. On to the lists = On 14050 kHz at 2300z: K1THP - Dave - CT - 686 W0CZ - Ken - ND - K3 - 286 N0TA - John - CO - K3 - 994 WB5BKL - Nick - TX - K3 - 231 N7KRT - Jeff - TX - K2 - 5471 AB9V - Mike - IN - K3 - 398 W0RSR - Mike - CO - K2 - 5767 K4JPN - Steve - GA - K2 - 1422 W8OV - Dave - TX - K3 - 3139 N0AR - Scott - MN - K2 - 4866 K1EV - Bill - CT - K2 - 2152 NK6A - Don - CA - K3 - 4569 K7BFL - Don - WA On 7045.5 kHz at 0100Z: N0TA - John - CO - K3 - 994 W0CZ - Ken - ND - K3 - 286 AB7CE - Roy - MT AB9V - Mike - IN - K3 - 398 K1THP - Dave - CT - K3 - 686 N0AR - Scott - MN - K2 - 4866 I hope you all have a very good 2011. It has started sunny and clear here with dry snow and chilly weather. As long as I get up in the middle of the night to feed the fire it stays nice and warm. I have to leave the vents open much further due to the cold so the fire does not last as long after each filling. But getting up at night is not a problem unless I stub my toe :) Until next week stay well, 73, Kevin. KD5ONS (Net Control Operator 5th Class) - -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 CW and RTTY tones
Don, Please explain what you mean by split tone. I do not understand that term without some clarification. For RTTY, there are two tones, usually separated by 170 Hz, and CW is a single tone. The offset from the suppressed carrier frequency may be a consideration in determining the actual signal frequency, but that is usually not relevant. Different radios display the frequency differently, and that must be taken into consideration if you are doing CW using audio tones generated by the soundcard. for native CW. On the K3, the transmit frequency is displayed if you are in CW mode, and in SSB mode (or DATA A) the suppressed carrier frequency is displayed, so the CW keying method (audio or RS-232 keying) you are using is a consideration for use with HRD keying. It all depends on what you are doing. 73, Don W3FPR On 1/2/2011 10:36 PM, gold...@charter.net wrote: Dear All, When operating CW or Rtty there is a split tone that you have to know about. I have been reading on the HRD forums to figure this out to get the software set up correctly. I know it has something to do with carrier supression, but it just does not make sense to me. So the more I read there the more confused I become. I have also tried google searches but I still have not figured it out yet. So if someone can direct me to some reading sources to help me understand this I would really appreciate it. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] AF-1: First Impressions
Ken, I found that the AF-1 is really great for CW signals - it really lifts them up out of the grass. I hope you find you get good value out of yours. 73 Kevin VK3DAP / ZL2DAP On 3/01/2011 2:41 PM, Ken Alexander wrote: Happy New Year Everyone! I started and finished my AF-1 this evening. It was an easy build; I was finished in a few hours. The tests worked out OK and I have been enjoying tuning around on my K2 to see what it will do for me. At first, it didn't seem to do much. Then I started to get the hang of tweaking the controls and now I'm very happy! I haven't had a chance to use it in crowded band conditions...maybe some morning soon on 20m. It does help bring the weak ones out of the mud though. More as I get a chance to work with it further. Tomorrow's the first day back to work after the holiday, so now it's time for bed! 73, Ken Alexander VE3HLS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Curious phenomenon with doublet on 80m
Hello everybody, Tonight I wanted to work station on 3504kHz but was not able to tune with K3 to transmit on that frequency. Here are the facts: - The antenna is multi-band dipole, a.k.a Van Gorden or Doublet - 137ft dipole center fed with 450 Ohm ladder line. - I do not use KAT3, it is installed but bypassed in this configuration. I use MFJ-986 Differential-T tuner with built-in balun. - I able to tune down to 1.1:1 on all frequencies above about 3505 with K3 and any other transceiver I tried. The optimal tuner settings at any given frequency are the same for all transceivers (besides K3 I tried Kenwood TS-930S and TS-570D with autotuner bypassed on both). - My setting for tune power on K3 is 30W, on TS-570D - 30W, on TS-930S - 50W - On frequencies 3501 to 3505 with both Kenwood transceivers the tuning is normal. With K3 the SWR is through the roof and there is no way I can find resonance to see reasonable SWR. - There is significant hysteresis to the phenomenon. When I move down on frequency I am able to tune down to 3505 or so. When I see the problem I have to return to about 3520 to see normal SWR again. - The problem seem to be apparent only on this small part of the band. I took time to go down from 3900 and was able to tune everywhere. Also I didn't see any problem on low portion of 40m band. Unfortunately, I don't have other antenna on 80m to compare. However, the fact that I don't see any issues with the same setup with different transceivers tells me that antenna and tuner probably are OK. I tried to tune K3 with different power: from 10W to 50W - same behavior. I do not have dummy load available at this moment, I will try tomorrow with dummy load. Any thoughts? 73, Igor, N1YX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 / KPA100: How to install chokes RFC6-7-8-9 near J8 ?
Thanks, Don - but I just checked again this morning, and it appears neither to be mentioned in the latest assembly manual nor in the latest errata sheets for KPA100. @ Eric, Wayne; Maybe this is to be mentioned in next revision of the errata sheets ? 73' Brian OZ2BRN K2 # 6936 Den 02-01-2011 20:51, Don Wilhelm skrev: Brian, I believe this is addressed on the errata sheet (it used to be). Yes, you can install them upright or at an angle, or with both leads bent under the body to enable horizontal mounting - the choice will depend on your version of which is more aesthetically pleasing. 73, Don W3FPR On 1/2/2011 1:52 PM, OZ2BRN Brian Lodahl wrote: Hi, It appears to me that all the mini-chokes RFC6-7-8-9 supplied with the KPA100 kit is not yet small enough to fit into the outline on the PCB, as shown near J8 (the DB-9 connector). The assembly manual does not state anything about the assembly direction of these chokes, if or if not they may be installed upright instead of flat on the PCB - but it appears there may be room to do so. I'm worried that if i attempt to force them in lying flat, I will damage the chokes insulation or cause for an open joint. Any experience here from previous KPA100 builders - what to go for ? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Nabble
Well I guess this makes it at least three Nabble users... Yes, it looks as if Nabble has died, still only one post there for this year. So back to getting the list via email. 73 Dave G3YMC On 2 Jan 2011 at 15:00, Julian, G4ILO wrote: I'm wondering if there is a connection between that and Nabble saying that our messages have not been accepted by the list yet. I'm also surprised no-one else has noticed. Perhaps we are the only two people who use Nabble? http://www.davesergeant.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
