Re: [Elecraft] Strange K2 Behavior?
Mine does that too. The VCO for a frequency around 14.360 MHz should be running aabout 19.274 MHz and the reference oscillator runs at about 12.096 MHz. 2*19.274-2*12.096 = 14.356 MHz, so that seems to be the culprit. It pops in because of the way the VCO is tuned. When you get to the edge of the fine tuning, the U4 tunes the VCO to the next 5KHz coarse step and U5 changes the reference oscillator back to the beginning of a fine step. For the previous coarse step the birdie is not heard, but for this coarse step the two oscillators are tuned so that it is. On my K2, with the way I have RTTY set up, I can hear it pop in on RTTY at 14361.5 and then it pops out at the next coarse step at 14366.5 73 Kevin w9cf Brian Mury-3 wrote: On Wed, 2008-10-15 at 19:34 -0600, Michael Lewis wrote: band. I actually tuned out of 20m by a little bit up to 14359 (14359.03 on the display to be exact) and BAM! I got an S9 tone. It goes from totally quiet to S9 as soon as the tuning display hits 14359.03. happens with no external antenna. I just tried it and I get the same thing. Starts at exactly: 14359.03 USB (I assume you were using USB?) 14360.80 CW 14359.25 CW reverse 14361.74 LSB 14361.50 RTTY 14358.53 RTTY reverse It behaves exactly as you described. It always starts suddenly then gradually tapers off in strength while tuning to higher frequencies. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- View this message in context: http://n2.nabble.com/Strange-K2-Behavior--tp1339332p1344229.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 #1927 alive
Ordered Jul 12 2008. Delivered Oct 13. Finished Oct 17. 3 months waiting time. Stew Perry warm up will also be K3 warm up. 73 Henk PA5KT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Strange K2 Behavior?
Michael Lewis wrote: Worked a mobile station in TX, and then casually tuned up the band. I actually tuned out of 20m by a little bit up to 14359 (14359.03 on the display to be exact) and BAM! I got an S9 tone. It goes from totally quiet to S9 as soon as the tuning display hits 14359.03. happens with no external antenna. It obviously must be an internal birdie, but I don't I suspect the design policy was that the spurious responses should not be controlled outside of the amateur bands, and this one may have dictated things like IF frequencies specifically to avoid its being in band. ever remember one that seems to be so abrupt - it's like something The reason for abrupt changes is that the K2 steps the synthesizer ratio relatively infrequently and interpolates by pulling the reference oscillator frequency. The sudden onset probably corresponds to a synthesizer step and corresponding jump of the reference oscillator frequency to the other extreme. -- David Woolley The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio List Guidelines http://www.elecraft.com/elecraft_list_guidelines.htm ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Strange K2 Behavior?
With respect Kevin the 'culprit' responsible for this birdie in my K2 is the (LO + IF) / 2 spurious response of the receiver which can 'hear' the PLL reference oscillator. When the receiver is tuned to 14.360 MHz the frequency of this particular response, assuming a 4.914 MHz IF, is (19.274 + 4.914) / 2 = 12.094 MHz, moving down to 11.914 MHz as the receiver is tuned down to 14.000 MHz. 73, Geoff GM4ESD Kevin W9CF wrote on Friday, October 17, 2008 at 8:29 AM Mine does that too. The VCO for a frequency around 14.360 MHz should be running aabout 19.274 MHz and the reference oscillator runs at about 12.096 MHz. 2*19.274-2*12.096 = 14.356 MHz, so that seems to be the culprit. It pops in because of the way the VCO is tuned. When you get to the edge of the fine tuning, the U4 tunes the VCO to the next 5KHz coarse step and U5 changes the reference oscillator back to the beginning of a fine step. For the previous coarse step the birdie is not heard, but for this coarse step the two oscillators are tuned so that it is. On my K2, with the way I have RTTY set up, I can hear it pop in on RTTY at 14361.5 and then it pops out at the next coarse step at 14366.5 73 Kevin w9cf ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 #1927 alive
Henk Remijn PA5KT wrote: Ordered Jul 12 2008. Delivered Oct 13. Finished Oct 17. 3 months waiting time. Nice that thr backlog is clearing. Let's hope the recent turbulence hasn't caused new orders to dry up. (And I find it *totally unfair* (WAAHH!) that the economic meltdown in the U.S. has caused the dollar to go through the roof. So there!) Jon LA4RT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT TEST - Cannot post to reflector
TEST for Tim at QTH Admin Regards, Vic -- I am using the free version of SPAMfighter. We are a community of 5.5 million users fighting spam. SPAMfighter has removed 116 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] PA and FP temperature on VFO B display line
Hi; I have not PA and FP temperature display on VFO B line, left are OK. What I have to do to switch ON these parameters? vy 73; Andy SP9NH K3 S/N 1334 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT Test - Cannot post to reflector
Test plain text -- I am using the free version of SPAMfighter. We are a community of 5.5 million users fighting spam. SPAMfighter has removed 116 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] PA and FP temperature on VFO B display line
Tap DISP button to turn ON the VFO B Alternate display 73, Ken K3IU Andrzej Oskedra wrote: Hi; I have not PA and FP temperature display on VFO B line, left are OK. What I have to do to switch ON these parameters? vy 73; Andy SP9NH K3 S/N 1334 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] PA and FP temperature on VFO B display line
If you have old firmware, you may need to enable TECH mode. It is not needed in FW starting from MCU 2.31 / DSP 1.89 73, Marek SQ2GXO K3 #1329 2008/10/17 Andrzej Oskedra [EMAIL PROTECTED]: Hi; I have not PA and FP temperature display on VFO B line, left are OK. What I have to do to switch ON these parameters? vy 73; Andy SP9NH K3 S/N 1334 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 problems keying Alpha 87A
Yesterday I connected my new factory built K3 to my Alpha 87A and the amplifier keeps going into fault on the first key closure. Power was only set at about 30 watts. Is there a power spike causing this or some other problem I am not aware of? I am brand new to this list and am not aware of previous discussion relating to this issue. Thanks, Charlie, W0CD___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 under construction
I also read about some owners having to replace the headphone jack. The headphone jack will go to the back and I will put a hefty 6 mm phone plug in there. Plenty of space there, hi hi. I wouldn't be so concerned with this. I have had my K2 for 6 years without any problems with the headphone jack. But I have always been careful to minimize strain on the connector and for that reason I have always used headphones with an angled connector. After wearability, the angled connector is on top of my list for requirements for a K2 headphone. See e.g. picure of the connector on the Koss Portapro website: http://www.koss.com/koss/kossweb.nsf/p?openformpc^pt^PORTAPRO which is what I use. By the way it is a comfortable headphone as well, no wonder it is the world's best-selling headphone. LA3ZA Sverre ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 split ops... filters
When I do the double hit on 'split' I move the freq mode to vfo B. ( good) It also tell VFOb ( 2nd rcvr) to go to filter # 4 to which my vfo A was 'set' , causing the sub rcvr to go dead, since I don't have a #4 on the sub rcvr. Is there a way to force Filter # 2 on... in the sub rcvr bill ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 TECH MD
I agree, tech mode should contain only those options used when setting the radio up for the first time, or configuring the various modules on and off. Whether that would stop my PA mysteriously setting itself to Bypass I don't know. I haven't identified the circumstances that cause it, but I do often operate at QRP levels and also quite often put the K3 into test mode to prevent accidental transmission. Then sometimes I find that I can't turn the power up past 12W. This caused some panic the first time it happened, until I found the KPA3 option had been set to Bypass. It has happened several times since, and it is certainly not me that is disabling it. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-TECH-MD-tp1343170p1345288.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] ATU Flashover
Problem on 80m SSB. I am experiencing what I can best describe as ATU Flashover on 80m SSB. Background - I have a K3 and Challenger 3 linear amplifier. Headgear is the Heil Proset plus. I can tune up the rig and amp to well in excess of 500W without any problem. CW can be operated at full power without any problems. However, when I modulate the radio using SSB on 80m at anything above approx 275W, the SWR goes from 1:1 to infinity and I can hear the ATU flashing over. It also occurs when modulating the radio using AFSK for RTTY operation. Opening the ATU reveals arcing between the capacitor plates. The problem does not occur on any other band. Grounding - all equipment is individually wired to a central rf earth point which is connected to a buried copper earth rod. I have a further 4 copper rods connected to the previously mentioned rod that are spread over a few feet. Antenna - 80m inverted L with six radials spread over about 45 degrees. I don't have another rig at present to substitute. Any idea what's going on please? Cheers, Terry G4MKP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] External ATU with IC 706
At present, I do not yet own any Elecraft items although several of the Elecraft items on the web site do interest me. The primary reason for this message is for basic information. I have an Icom 706 MK2G as the only base HF radio. Recently, I asked on the Icom reflector if the T1-K Antenna Tuner would work with the IC706 radio. The answer received was: Sorry, I am not acquainted with the Elecraft product. The Icom tuners which are compatible with the 706 series are the AT-180, AH-3 and AH-4. LDG also make a line of tuners with the 4-pin Molex plug interface. I believe that the LDG tuners support the Icom tuner control scheme. In reading the assembly manuals and the errata sheets, there is only a very brief mention of using J1 to connect the tuner to a non-Elecraft radio. Basic question becomes: Is there a way to wire, or configure, a 4-pin Molex interface on a short cable to run between the ATU and the 706? Thank you in advance. Jim Good KD5VXH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] ATU Flashover
Terry you do not mention the lenght of your inverted L. However if it is end fed then it is unlikely to be exact 50 ohm. Then the length of coax gets important because it may do an impedance transformation. What is happening is that your tuner works in a high impedance load and that means high voltages. Nothing wrong with your rigs / ATU, just the way the antenna has been set up. You may also find that you have RFI. You can try adding or shortening the coax lenght to see if it helps. 73, Marinus, ZL2ML G4MKP wrote: Problem on 80m SSB. I am experiencing what I can best describe as ATU Flashover on 80m SSB. Background - I have a K3 and Challenger 3 linear amplifier. Headgear is the Heil Proset plus. I can tune up the rig and amp to well in excess of 500W without any problem. CW can be operated at full power without any problems. However, when I modulate the radio using SSB on 80m at anything above approx 275W, the SWR goes from 1:1 to infinity and I can hear the ATU flashing over. It also occurs when modulating the radio using AFSK for RTTY operation. Opening the ATU reveals arcing between the capacitor plates. The problem does not occur on any other band. Grounding - all equipment is individually wired to a central rf earth point which is connected to a buried copper earth rod. I have a further 4 copper rods connected to the previously mentioned rod that are spread over a few feet. Antenna - 80m inverted L with six radials spread over about 45 degrees. I don't have another rig at present to substitute. Any idea what's going on please? Cheers, Terry G4MKP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- View this message in context: http://n2.nabble.com/ATU-Flashover-tp1345469p1345642.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] ATU Flashover
When you switch from CW to SSB are you also changing frequencies from the CW subband to the SSB subband? If so, repeat your test on the same frequency. My simple world view makes this one easy to solve. Stay on CW :-) - Keith N1AS - - K3 711 - From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of G4MKP Sent: Friday, October 17, 2008 10:47 AM To: elecraft@mailman.qth.net Subject: [Elecraft] ATU Flashover Problem on 80m SSB. I am experiencing what I can best describe as ATU Flashover on 80m SSB. Background - I have a K3 and Challenger 3 linear amplifier. Headgear is the Heil Proset plus. I can tune up the rig and amp to well in excess of 500W without any problem. CW can be operated at full power without any problems. However, when I modulate the radio using SSB on 80m at anything above approx 275W, the SWR goes from 1:1 to infinity and I can hear the ATU flashing over. It also occurs when modulating the radio using AFSK for RTTY operation. Opening the ATU reveals arcing between the capacitor plates. The problem does not occur on any other band. Grounding - all equipment is individually wired to a central rf earth point which is connected to a buried copper earth rod. I have a further 4 copper rods connected to the previously mentioned rod that are spread over a few feet. Antenna - 80m inverted L with six radials spread over about 45 degrees. I don't have another rig at present to substitute. Any idea what's going on please? Cheers, Terry G4MKP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] ATU Flashover
Terry, As another responder indicated, you have a high impedance at the feedline/ATU junction - a high impedance translated into a higher voltage for any given amount of RF, and when that voltage is high enough, the tuner capacitors will arc. When they arc over, the capacitance changes drastically and quickly, so your SWR at the tuner input goes up a lot. The best fix is at the antenna feedpoint - add inductance or capacitance (or both) in a network there to bring the input impedance closer to 50 ohms at all frequencies of interest. You are not likely to find a single network that will be best for both the CW and the phone end of 80 meters, but the line SWR may be tolerable if you set the network at the antenna base for a 50 ohm feed at mid-band. Even so, you can expect the SWR to go up to 3:1 or even more at both ends of the band. You will have to do some work with an antenna analyzer at the base of the antenna to determine what type of matching network is needed there. 73, Don W3FPR G4MKP wrote: Problem on 80m SSB. I am experiencing what I can best describe as ATU Flashover on 80m SSB. Background – I have a K3 and Challenger 3 linear amplifier. Headgear is the Heil Proset plus. I can tune up the rig and amp to well in excess of 500W without any problem. CW can be operated at full power without any problems. However, when I modulate the radio using SSB on 80m at anything above approx 275W, the SWR goes from 1:1 to infinity and I can hear the ATU flashing over. It also occurs when modulating the radio using AFSK for RTTY operation. Opening the ATU reveals arcing between the capacitor plates. The problem does not occur on any other band. Grounding – all equipment is individually wired to a central rf earth point which is connected to a buried copper earth rod. I have a further 4 copper rods connected to the previously mentioned rod that are spread over a few feet. Antenna – 80m inverted L with six radials spread over about 45 degrees. I don’t have another rig at present to substitute. Any idea what’s going on please? Cheers, Terry G4MKP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] External ATU with IC 706
On Fri, 2008-10-17 at 10:00 -0500, Jim Good wrote: In reading the assembly manuals and the errata sheets, there is only a very brief mention of using J1 to connect the tuner to a non-Elecraft radio. The owner's manual (which is separate from the assembly manual) has a description of how J1 works. Are you aware that the T1 is a 20W tuner? You can use it with a 706 if you turn down the power to 20W or lower, but you will not be able to use it at 100W. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] ATU Flashover
Define 275W. Is that PEP or is that average. If it is what the meter reads the SSB peaks might be much higher. I assume you actually knew this. Another possibility is the K3 power spike on first SSB syllable, that might be higher than the one on CW. Whenever you change mode or power setting, the ALC is reset and there is a high power spike. If that initial spike causes a breakdown, the arc will persist. However, on the second key up after a little delay to let everything cool off there should not be another arc. If there is, that was not the problem. Easy to eliminate this one. Another possibility is simple RF feedback, causing the K3 PA and amp combination to oscillate at some other frequency where the VSWR is poor. Are you wearing the headset when operating CW? If so it should happen in CW so it probably is not that either. Mike G4MKP wrote: Problem on 80m SSB. However, when I modulate the radio using SSB on 80m at anything above approx 275W, the SWR goes from 1:1 to infinity and I can hear the ATU flashing over. It also occurs when modulating the radio using AFSK for RTTY operation. Opening the ATU reveals arcing between the capacitor plates. The problem does not occur on any other band. Terry G4MKP -- View this message in context: http://n2.nabble.com/ATU-Flashover-tp1345469p1345899.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Strange K2 Behavior?
This is a known out-of-band birdie on the K2 and has always been there. Part of our design goal on the K2 was to place any strong mixing products lile this outdie the ham bands. All superhet receivers will have birdies. Fortunately most are quite weak and are usually covered by band noise. This strong one was unavoidable and we purposely adusted the synthesizer and bfo parameters to place it outside the ham band. 73, Eric WA6HHQ _..._ -Original Message- From: w9cf [EMAIL PROTECTED] Date: Friday, Oct 17, 2008 12:29 am Subject: Re: [Elecraft] Strange K2 Behavior? To: elecraft@mailman.qth.net Mine does that too. The VCO for a frequency around 14.360 MHz should be running aabout 19.274 MHz and the reference oscillator runs at about 12.096 MHz. 2*19.274-2*12.096 = 14.356 MHz, so that seems to be the culprit. It pops in because of the way the VCO is tuned. When you get to the edge of the fine tuning, the U4 tunes the VCO to the next 5KHz coarse step and U5 changes the reference oscillator back to the beginning of a fine step. For the previous coarse step the birdie is not heard, but for this coarse step the two oscillators are tuned so that it is. On my K2, with the way I have RTTY set up, I can hear it pop in on RTTY at 14361.5 and then it pops out at the next coarse step at 14366.5 73 Kevin w9cf Brian Mury-3 wrote: On Wed, 2008-10-15 at 19:34 -0600, Michael Lewis wrote: band. I actually tuned out of 20m by a little bit up to 14359 (14359.03 on the display to be exact) and BAM! I got an S9 tone. It goes from totally quiet to S9 as soon as the tuning display hits 14359.03. happens with no external antenna. I just tried it and I get the same thing. Starts at exactly: 14359.03 USB (I assume you were using USB?) 14360.80 CW 14359.25 CW reverse 14361.74 LSB 14361.50 RTTY 14358.53 RTTY reverse It behaves exactly as you described. It always starts suddenly then gradually tapers off in strength while tuning to higher frequencies. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- View this message in context: http://n2.nabble.com/Strange-K2-Behavior--tp1339332p1344229.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] ATU Flashover
Are you running your K3 tuner into the amp? If so, shouldn't' the amp be giving the radio a nice match to start with? Are you running a tuner after the amp as well? If you are running the K3 tuner, turn it off. Is this on the exact same frequency or are you switching between the cw and ssb portions. What freq is the antenna tuned for? _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of G4MKP Sent: Friday, October 17, 2008 8:47 AM To: elecraft@mailman.qth.net Subject: [Elecraft] ATU Flashover Problem on 80m SSB. I am experiencing what I can best describe as ATU Flashover on 80m SSB. Background - I have a K3 and Challenger 3 linear amplifier. Headgear is the Heil Proset plus. I can tune up the rig and amp to well in excess of 500W without any problem. CW can be operated at full power without any problems. However, when I modulate the radio using SSB on 80m at anything above approx 275W, the SWR goes from 1:1 to infinity and I can hear the ATU flashing over. It also occurs when modulating the radio using AFSK for RTTY operation. Opening the ATU reveals arcing between the capacitor plates. The problem does not occur on any other band. Grounding - all equipment is individually wired to a central rf earth point which is connected to a buried copper earth rod. I have a further 4 copper rods connected to the previously mentioned rod that are spread over a few feet. Antenna - 80m inverted L with six radials spread over about 45 degrees. I don't have another rig at present to substitute. Any idea what's going on please? Cheers, Terry G4MKP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 and a transverter
Hello, Can anybody help explain clearly to me how I connect a receive converter up to my K3? I blew up my 2m receive converter hooking it up to the main 28 MHz antenna terminal today and I don't want to repeat that if I can find a replacement somewhere! I have found the transverter settings in the config menu, and think I have those set up so I SHOULD be able to get something to work by plugging 28 MHz IF output into the transverter input, but I was unable to figure out how to make the K3 look for signal there. I also did not get any RF input when I connected the 28 MHz IF output to the RX ANT IN jack :-( There must be some mystery switch that I haven't found yet to enable these two functions. I also would appreciate it if somebody knows how to mute the K3 receiver when a separate XMTR is being used. I searched the manual but could not find it. I am trying to incorporate the K3 into my existing station, but the rats nest and maze of decades of wiring is very frightening! Any guidance would be greatly appreciated. VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj 2m DXCC #11/6m DXCC #815 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 and a transverter
Hi Lance, I suppose you have to define transverter to use LowPower driving (XVx PWR L x.x) to use XVTR IN for RX (as KXV3 will be active in this mode). (Or you can set KXV3 to test in CONFIG (KXV3 TEST not norm) when all is routed via KXV3 ports but this has nothing to do with XVTR settings - see page 54 OpMan) Or you can use High setting (XVx H x.x via ANT port) and switch K3 to RX ANT to use RX ANT IN BNC port for RX and ANT for TX (this is I am using now). In both cases there is no way to blow-up RX as no RF can be on input ports. If you need more deatils email me off the list. No idea about muting, it is interesting question... 73! Lexa, OK1DST K3/10 #727 LANCE COLLISTER napsal(a): Hello, Can anybody help explain clearly to me how I connect a receive converter up to my K3? I blew up my 2m receive converter hooking it up to the main 28 MHz antenna terminal today and I don't want to repeat that if I can find a replacement somewhere! I have found the transverter settings in the config menu, and think I have those set up so I SHOULD be able to get something to work by plugging 28 MHz IF output into the transverter input, but I was unable to figure out how to make the K3 look for signal there. I also did not get any RF input when I connected the 28 MHz IF output to the RX ANT IN jack :-( There must be some mystery switch that I haven't found yet to enable these two functions. I also would appreciate it if somebody knows how to mute the K3 receiver when a separate XMTR is being used. I searched the manual but could not find it. I am trying to incorporate the K3 into my existing station, but the rats nest and maze of decades of wiring is very frightening! Any guidance would be greatly appreciated. VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj 2m DXCC #11/6m DXCC #815 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 and a transverter
Lance The easy way to mute the K3, while using a separate TX, is to key the K3 with TEST MODE set to ON. I use the same arrangement to mute a K2 from the K3. 73 Dave, G4AON K3/100 #80 http://www.astromag.co.uk/k3/ -- I also would appreciate it if somebody knows how to mute the K3 receiver when a separate XMTR is being used. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 and a transverter
Hi Lance group. I also would appreciate it if somebody knows how to mute the K3 receiver when a separate XMTR is being used. I searched the manual but could not find it. Something I've done to overcome a similar problem was TXing the K3 as well, perhaps have it go split somewhere away from your TX frequency at low to zero power? Does that help? Andy http://gd0tep.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Power problems
Hello, I'm having problems with my power out put. I have followed the calibration procedure and the K3 more or less puts out the desired power on all bands. (I'm not sure how accurate my PWR meter is) The problem occurs in SSB when I'm using a microphone (Heil pro set plus or a Kenwood MC-43S, that doesn't matter). When I have set the power to 100W and I yell Oooolaaa (into a dummy load off course) into the mic, the PA puts out full power en after a couple off seconds it drops to the set power. When I do the same with the power set 50 W, it produces around 70 W and again, after a few seconds the power drops to 50 W. After the initial power drop it pretty much stays at the pre set power but when I rotate the PWR knob and set the power to a different level, the same thing happens again. This only happens when using microphones. When using the TUNE button this doesn't happen. What is wrong? 73, Maarten PD2R ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 and a transverter
gd0tep wrote: *Hi Lance group.* I also would appreciate it if somebody knows how to mute the K3 receiver when a separate XMTR is being used. I searched the manual but could not find it. Something I've done to overcome a similar problem was TXing the K3 as well, perhaps have it go split somewhere away from your TX frequency at low to zero power? Does that help? Andy http://gd0tep.com G4AON suggested that I put it into TEST mode, in which case it will only mute the receiver when I key it up. That seems like a good solution.but now that it is muted I can't get it to XMIT anymore :-( There is an awful lot to try to figure out on this radio, and obviously something that I should have tried to figure out before I went to the East Coast this week :-( Obviously with a blown up converter I guess I won't be on at all for the EME contest this weekend, but I hope I can get something lashed together so I can operate both 6m and 2m EME again for the P29 and all my other 6m EME skeds next week! Right now, I can't even XMIT with it on 6m anymore 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj 2m DXCC #11/6m DXCC #815 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 and a transverter
Lance, you can disable TX-out by TX INHIBIT signal to be sure you are not emitting RF. It is possible by some short pins on connector only or you can force this together with PTT from the second RIG. Then you do not need to go to TX TEST mode manually and you will disable TX only when second RIG will go to TX. But do not understand why you are not able to XMIT now... If something strange then F/W reloading I will do as the first. But... GL in the Contest, 73! Lexa, ok1dst K3/10 #727 LANCE COLLISTER napsal(a): gd0tep wrote: *Hi Lance group.* I also would appreciate it if somebody knows how to mute the K3 receiver when a separate XMTR is being used. I searched the manual but could not find it. Something I've done to overcome a similar problem was TXing the K3 as well, perhaps have it go split somewhere away from your TX frequency at low to zero power? Does that help? Andy http://gd0tep.com G4AON suggested that I put it into TEST mode, in which case it will only mute the receiver when I key it up. That seems like a good solution.but now that it is muted I can't get it to XMIT anymore :-( There is an awful lot to try to figure out on this radio, and obviously something that I should have tried to figure out before I went to the East Coast this week :-( Obviously with a blown up converter I guess I won't be on at all for the EME contest this weekend, but I hope I can get something lashed together so I can operate both 6m and 2m EME again for the P29 and all my other 6m EME skeds next week! Right now, I can't even XMIT with it on 6m anymore 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj 2m DXCC #11/6m DXCC #815 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 and a transverter
Lance, Your frustration is coming through - yes, just before an event weekend is not really a good time to check everything out. Have you tried a power cycle? Is the receiver continuously muted? Was the key closed when the K3 was powered up? There is a TX lockout if the key or PTT is closed at power on time, and it will stay with transmit inhibited until the Key or PTT closure is opened. Is the K3 still in TX TEST? The little TX indicator will be blinking if in TX Test. Press TEST again to get out of test mode. If not TX TEST, then do you have something holding TX INH active? Do you see any error messages? If not, then it is most likely something wrong with your setup, but we really can't help much until we know more about all your connections. 73, Don W3FPR LANCE COLLISTER wrote: gd0tep wrote: *Hi Lance group.* I also would appreciate it if somebody knows how to mute the K3 receiver when a separate XMTR is being used. I searched the manual but could not find it. Something I've done to overcome a similar problem was TXing the K3 as well, perhaps have it go split somewhere away from your TX frequency at low to zero power? Does that help? Andy http://gd0tep.com G4AON suggested that I put it into TEST mode, in which case it will only mute the receiver when I key it up. That seems like a good solution.but now that it is muted I can't get it to XMIT anymore :-( There is an awful lot to try to figure out on this radio, and obviously something that I should have tried to figure out before I went to the East Coast this week :-( Obviously with a blown up converter I guess I won't be on at all for the EME contest this weekend, but I hope I can get something lashed together so I can operate both 6m and 2m EME again for the P29 and all my other 6m EME skeds next week! Right now, I can't even XMIT with it on 6m anymore 73, Lance ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] ATU Flashover
Don Spot on! Thank you and also to Mike, W0MUshould have picked this up myself. Haven't done any operating over the last few weeks but I have been tidying up the antennas around the garden. Whilst doing this I thought that I would improve my 80m antenna by firstly spreading the radials out a bit and secondly by increasing their number. Did that, got distracted and stupidly didn't check the antenna with the analyzer until just now. Sure enough the antenna resonance had changed to around 3.46Mhz so I lopped off around 5' and she's back to just over 3.7Mhz. Booming all over Europe with fb reports and no flashover. Cheers, Terry G4MKP As another responder indicated, you have a high impedance at the feedline/ATU junction - a high impedance translated into a higher voltage for any given amount of RF, and when that voltage is high enough, the tuner capacitors will arc. When they arc over, the capacitance changes drastically and quickly, so your SWR at the tuner input goes up a lot. The best fix is at the antenna feedpoint - add inductance or capacitance (or both) in a network there to bring the input impedance closer to 50 ohms at all frequencies of interest. You are not likely to find a single network that will be best for both the CW and the phone end of 80 meters, but the line SWR may be tolerable if you set the network at the antenna base for a 50 ohm feed at mid-band. Even so, you can expect the SWR to go up to 3:1 or even more at both ends of the band. You will have to do some work with an antenna analyzer at the base of the antenna to determine what type of matching network is needed there. 73, Don W3FPR G4MKP wrote: Problem on 80m SSB. I am experiencing what I can best describe as ATU Flashover on 80m SSB. Background - I have a K3 and Challenger 3 linear amplifier. Headgear is the Heil Proset plus. I can tune up the rig and amp to well in excess of 500W without any problem. CW can be operated at full power without any problems. However, when I modulate the radio using SSB on 80m at anything above approx 275W, the SWR goes from 1:1 to infinity and I can hear the ATU flashing over. It also occurs when modulating the radio using AFSK for RTTY operation. Opening the ATU reveals arcing between the capacitor plates. The problem does not occur on any other band. Grounding - all equipment is individually wired to a central rf earth point which is connected to a buried copper earth rod. I have a further 4 copper rods connected to the previously mentioned rod that are spread over a few feet. Antenna - 80m inverted L with six radials spread over about 45 degrees. I don't have another rig at present to substitute. Any idea what's going on please? Cheers, Terry G4MKP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2/100 power output
Hello My K2/100 just recently started going to 100 watts output as soon as I set the output to 11 watts or greater. I disconnected the amp, and am back to the qrp version and everything works fine. So I asume the problem is with the amp. Am I correct? Thanks Scott N5SM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2/100 power output
Scott, Yes, the problem is with the KPA100. The most likely thing is that diodes D16 and D17 are damaged which results in the KPA100 not being able to tell the K2 that power output is being developed, so the K2 just increases the power to the max in an effort to obtain a power output indication. At setting less than 11 watts, the base K2 is probably producing its maximum power output as well which will be in the 10 to 15 watt range. The most probable cause for D16, D17 failure is a lightning surge - it is always a good idea to disconnect the antennas when not in use. I switch all my equipment to a dummy load unless I am actively operating. 73, Don W3FPR [EMAIL PROTECTED] wrote: Hello My K2/100 just recently started going to 100 watts output as soon as I set the output to 11 watts or greater. I disconnected the amp, and am back to the qrp version and everything works fine. So I asume the problem is with the amp. Am I correct? Thanks Scott N5SM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.173 / Virus Database: 270.8.1/1730 - Release Date: 10/17/2008 8:07 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Power problems
Maarten van Rossum wrote: Hello, I'm having problems with my power out put. I have followed the calibration procedure and the K3 more or less puts out the desired power on all bands. (I'm not sure how accurate my PWR meter is) The problem occurs in SSB when I'm using a microphone (Heil pro set plus or a Kenwood MC-43S, that doesn't matter). When I have set the power to 100W and I yell Oooolaaa (into a dummy load off course) into the mic, the PA puts out full power en after a couple off seconds it drops to the set power. When I do the same with the power set 50 W, it produces around 70 W and again, after a few seconds the power drops to 50 W. After the initial power drop it pretty much stays at the pre set power but when I rotate the PWR knob and set the power to a different level, the same thing happens again. This only happens when using microphones. When using the TUNE button this doesn't happen. What is wrong? I don't know, Maarten, but I think there is something fundamentally wrong with the K3 ALC at the moment. I don't use SSB much and don't have a peak reading meter. Like you on TUNE and in CW I get exactly the requested power, but when I feed audio in to operate data modes I don't get the power I requested. The difference in my case is that I get almost twice the requested power, and it never backs down to the requested power so I have to use the audio drive level to regulate the output, which is not very convenient. In SSB I cannot be confident that when I select 100W the peak output is really being limited to that power. I have re-done the power calibration and I have the TX Gain setting at zero. I cannot see any reason why the radio should produce more power than that selected with the power control. This was not a problem with earlier firmware releases. It has reached the point that I am losing confidence in the whole concept of software defined radios. Working with computers, I have probably wasted many days of my life on problems that were caused by bugs, and now it seems there is no escape from them in my hobby either. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Power-problems-tp1346539p1347131.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Power problems
Hello Maarten! The problem occurs in SSB when I'm using a microphone (Heil pro set plus or a Kenwood MC-43S, that doesn't matter). When I have set the power to 100W and I yell Oooolaaa (into a dummy load off course) into the mic, the PA puts out full power en after a couple off seconds it drops to the set power... If this is happening consistently, please go to CONFIG:TX VCE and change the setting from 0.0 to something less, perhaps -1.5 or so, and try again. I think you'll find a setting that works well with your particular voice, Tx EQ amd CMP settings. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3: No Power Output
Ok, I need some help. My K3 has been working great, even though I have not found much time recently to operate. I listen more than I talk, and everything has been great. Today I sit down after work and turn it on and attempt to transmit. No power output. The display reads zero watts, and has two dashes where the SWR normally resides. The TX icon is flashing on and off. Here is what I have done: 1) Checked to make sure it was not in test mode. That was Okay. 2) Checked to make sure that I have not routed RF through the KXV3's XVTR IN/OUT jacks by accidently switching to a transverter band. That was okay. 3) Checked that CONFIG:KXV3 was not set to TEST. That was okay. 4) Attempted to recalibrate the power on all bands via the manual. Got no output when pressing the TUNE button. We have not had any power outages, nor have we had any thunderstorms (Almost wish we would, because we could use the rain, it is so dry here in Kentucky!) The K3 is a K3-100 with KXV3 board, the 13KHz, 2.8KHz and 400Hz filters, KAT3 board. I have hooked it to an external power meter (the LP-100) and dummy load to be sure it was not putting out any power, so the cables have all been switched and have been eliminated as problems. The receiver was operating, although it's gain did not seem to be quite what it has been. (This may be a clue?) So, I am asking the collective wisdom of this list-serve, What else do I check? There are 10 types of people in the world -- those who understand binary and those who don't. William Evans [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: No Power Output
...The TX icon is flashing on and off. This means the radio is in TX TEST mode. Hold the TEST button (the right side of the MODE switch) to cancel TX TEST mode and return to normal transmit operation. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: No Power Output
Thanks Lyle, but I have already tried that, and the K3 is NOT in test mode. On Oct 17, 2008, at 7:26 PM, Lyle Johnson wrote: ...The TX icon is flashing on and off. This means the radio is in TX TEST mode. Hold the TEST button (the right side of the MODE switch) to cancel TX TEST mode and return to normal transmit operation. 73, Lyle KK7P There are 10 types of people in the world -- those who understand binary and those who don't. William Evans [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: No Power Output
William Evans wrote: Thanks Lyle, but I have already tried that, and the K3 is NOT in test mode. Check CONFIG TX INH. If it isn't off and the TX INHIBIT pin is floating, it might cause the symptom you have. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: No Power Output
Thanks Vic... that was it. Somehow TX INH had been set to LO=INH. I set it back to OFF, and power suddenly returned. Thanks again for the wisdom of this group! Bill W4ish On Oct 17, 2008, at 7:37 PM, Vic K2VCO wrote: William Evans wrote: Thanks Lyle, but I have already tried that, and the K3 is NOT in test mode. Check CONFIG TX INH. If it isn't off and the TX INHIBIT pin is floating, it might cause the symptom you have. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco There are 10 types of people in the world -- those who understand binary and those who don't. William Evans [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 - RF board: Q2 leakage
Hi Don, A few K3 firmware revs ago, after I updated the radio, I noticed some strange power on behavior. I was in touch with Wayne at the time on another subject, and he indicated these symptoms indicate a high leakage on Q2 - RF board. Symptoms: Rapid-firing the Power switch only lights up the LCD backlight. If one cycles the external power supply between K3 power cycles, this doesn't happen. If I can get the K3 to sequence power up normally, there is a _loud_ period of audio that sounds muffled, like it's on the wrong filter setting or there is something going on with the RX EQ. After the strange audio disappears, things seem to go normally. I never noticed these symptoms before, so I though there was some change in the new firmware I loaded. Wayne thought otherwise, and suggested that the symptom indicated Q2 had excess leakage. Power supply below is set at 13.8VDC. DVM time: K3 power off, with external power applied - Q2-G - 13.3V Q2-D - 0.097V K3 power on - Q2-G: 6.66V Q2-D: 13.3V So far so good. But watching Q2-D while powering down, it takes between 2 and 4 seconds for that net to drop from full voltage output to about 0.5V. Wayne had said that high leakage would be indicated by a slow retreat of the drain voltage from full output to about 0.5V. On the other hand, I don't know if the 0.1V that shows at Q2-D while the K3 is powered off is right or not. That would indicate a static leakage value to me. I think it should be *a lot* closer to 0V. I have a replacement Q2 here, but don't want to operate on the radio unless it's really necessary. Do you have any recommendations? Thanks, Matt Zilmer, W6NIA K3 #24 K2 #2810 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 - RF board: Q2 leakage
Matt, Wayne have more intimate knowledge of the K3 hardware and MCU firmware than anyone else. If Wayne believes that replacing Q2 will fix the problem, then I would replace Q2. 73, Don W3FPR Matt Zilmer wrote: Hi Don, A few K3 firmware revs ago, after I updated the radio, I noticed some strange power on behavior. I was in touch with Wayne at the time on another subject, and he indicated these symptoms indicate a high leakage on Q2 - RF board. Symptoms: Rapid-firing the Power switch only lights up the LCD backlight. If one cycles the external power supply between K3 power cycles, this doesn't happen. If I can get the K3 to sequence power up normally, there is a _loud_ period of audio that sounds muffled, like it's on the wrong filter setting or there is something going on with the RX EQ. After the strange audio disappears, things seem to go normally. I never noticed these symptoms before, so I though there was some change in the new firmware I loaded. Wayne thought otherwise, and suggested that the symptom indicated Q2 had excess leakage. Power supply below is set at 13.8VDC. DVM time: K3 power off, with external power applied - Q2-G - 13.3V Q2-D - 0.097V K3 power on - Q2-G: 6.66V Q2-D: 13.3V So far so good. But watching Q2-D while powering down, it takes between 2 and 4 seconds for that net to drop from full voltage output to about 0.5V. Wayne had said that high leakage would be indicated by a slow retreat of the drain voltage from full output to about 0.5V. On the other hand, I don't know if the 0.1V that shows at Q2-D while the K3 is powered off is right or not. That would indicate a static leakage value to me. I think it should be *a lot* closer to 0V. I have a replacement Q2 here, but don't want to operate on the radio unless it's really necessary. Do you have any recommendations? Thanks, Matt Zilmer, W6NIA K3 #24 K2 #2810 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KX1 REMOTE SPEAKER
KX1 3 questions. 1. KX1, s/n 2074, (basic unit), is on the air. Works perfectly with 589 QSO's on 40 20 at 4+ watts. Only problem was installation of the *$%* battery holders with screws provided. Elecraft sent longer ones but the plastic holders still are too thick for the longer ones too. (Wires are not pinched). This seems to be the weakest link in a great rig. Will build the 80-30 module and ATU next. I have received opposite opinions on which module to install first. I'd welcome any comments. Now the primary question. To stay with the kit concept, I'd welcome suggestions on building, 'not buying', a small amplified speaker with a 2' cord to plug into the phone jack on my KX1. I'm thinking along the lines of using a LM386N chip with a 1 speaker in a small 1 x 1.5 x 4 Rat Shack plastic box. It's just 'gotta' be home brew and small. Any suggestions? 72 Bob, W9EWW___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] T1 How to mount it?
My T1 is sitting unused, along with my FT-817. The reason is that I haven't figured out the best way to mount them together. I am not looking for a fancy compact package, and it seems too messy to put the tuner into the radio's battery compartment (which I don't use for anything). My basic requirement is to have everything solidly connected together. I have had enough of radio connected to tuner connected to this and that, all draped over a rock, so that if one box starts sliding down, the rest follows... Fellow KX1 users will understand... Just mounting everything on a strip of plywood would do it. The strip would be narrow enough to stuff down through the top opening of a backpack, with the radio front panel at one end. Maybe that end would be supported by a hinged board to lift the front up during operation (with some kind of snap lock). The T1 could then be mounted facing the operator, under the radio. Of course, I would still just take the KX1 many times, but with conditions improving and higher bands coming to life, even supporting SSB at low power, the 817 will have its place. At least until there is a KX2... I wish the T1 had some kind of provision for mounting. I have thought of a foam pad with double-sided adhesive, but that seems messy when it comes time to change the battery. One could permanently glue on a plastic plate with a dovetail mount or ears for screw mounting. One could machine a replacement case back with the ears or dovetail incorporated. One could fabricate some kind of clamp. If you have implemented a solution, please let me know, even if it is just rubber bands! Maybe others would be interested too? 73 Erik K7TV -- View this message in context: http://n2.nabble.com/T1--How-to-mount-it--tp1347998p1347998.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
