[Elecraft] Multiple KPA-500's with Combiner
The combiner idea is an interesting concept for the KPA-500. Combiners are very common in solid-state broadcast transmitters and one of the major advantages is redundantcy. If you had 3 KPA-500's run thru a combiner and running 1,500 watts output... even if one died then you'd still have 1,000 watts output. For serious contesting work, the combiner sounds like a terrific idea. 3 KPA-500's x $2,000 = $6,000 which is close to what a single 1,500 watt solid-state amp is likely to cost and with the multiple KPA-500's you'd have the big advantage in that you're still on-the-air with almost full power even if one KPA-500 fails. 73, Dick- K9OM Joe, Why not stack 4 KPA500's and use a combiner!!! 73 Tony Fegan VE3QF On Fri-10-Sep-10 12:15 PM, Joe Subich, W4TV wrote: Snip: The one vacant market niche - and one Elecraft appear to have avoided - is the US Legal Limit solid state segment. There are literally dozens of 500 - 600 watt solid state amps and several good products at the 1000 W PEP level but there is nothing that covers 160 - 6 at 1500 W CW/RTTY. __ 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] K3DVR Tally output
Strikes me, that would be a good option added to the firmware 73 de M0XDF, K3 #174, P3 #108 -- Life is mostly froth and bubble, Two things stand like stone, Kindness in another's trouble, Courage in your own. -Adam Lindsay Gordon, poet (1833-1870) On 11 Sep 2010, at 06:33, Nick Winter K7MO wrote: Please excuse if this subject has been beaten to death. Is there a way to provide a change of state or output on any of the Aux I/O pins ONLY when the K3DVR is playing on the air. I'm looking for a way to mute my microphone during DVR playback. __ 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] K3DVR Tally output
Or perhaps, be able to set a dim level including zero. 73 de na6m On 9/11/2010 1:27 AM, David Ferrington, M0XDF wrote: Strikes me, that would be a good option added to the firmware 73 de M0XDF, K3 #174, P3 #108 __ 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] KPA500
Oh lord all mighty, save us from all IMD. This crap is already made by RM Italy. / Jim --- On 2010-09-10 18:59, Edward R. Cole wrote: ham come up with one? Price ought to be in $125-150 bracket since no filtering is needed if used with the following KPA500. 73, Ed - KL7UW __ 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 - Ethic, Esthetic and Experience
L. T. Stem wrote: A very fair and true statement. Although there is a large something left out. Some 7,000 strong ops who are K2 owners should be included as well. A good point - I should have mentioned the important segment of K3 owners who particularly want *their* K3 to be a next-generation K2. -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek __ 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] K3DVR Tally output
The latest 4.10 beta firmware provides additional K3DVR features and they work well, but I would also like to see a Record time counter similar to that currently available for Playback. 73 de David G4DMP In a recent message, Nick Winter K7MO wj...@blarg.net wrote ... Please excuse if this subject has been beaten to death. Is there a way to provide a change of state or output on any of the Aux I/O pins ONLY when the K3DVR is playing on the air. I'm looking for a way to mute my microphone during DVR playback. -- +- - - - - - - - - - - - - - - - - - - - -+ | David M Pratt G4DMP, Kippax, Leeds, UK | | K1 #1117; KX1 #0052; K2 #1583; K3 #0186 | +- - - - - - - - - - - - - - - - - - - - -+ __ 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] K3DVR Tally output
Is there DVR f/w 1.04 somewhere published? In beta 4.10 is not included. In release notes related to 4.10 (respectively 4.06) mentioned - Also added support added for latest KDVR3 firmware revision (1.04). 73! Lexa, OK1DST 2010/9/11 David Pratt da...@g4dmp.fsnet.co.uk The latest 4.10 beta firmware provides additional K3DVR features and they work well, but I would also like to see a Record time counter similar to that currently available for Playback. 73 de David G4DMP In a recent message, Nick Winter K7MO wj...@blarg.net wrote ... Please excuse if this subject has been beaten to death. Is there a way to provide a change of state or output on any of the Aux I/O pins ONLY when the K3DVR is playing on the air. I'm looking for a way to mute my microphone during DVR playback. -- +- - - - - - - - - - - - - - - - - - - - -+ | David M Pratt G4DMP, Kippax, Leeds, UK | | K1 #1117; KX1 #0052; K2 #1583; K3 #0186 | +- - - - - - - - - - - - - - - - - - - - -+ __ 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 DX4Win
Hi Gang Anyone using DX4Win with the K3, The MODE in DX4win will not recognize PSK31 on k3 and is defaulting to RTTY mode. IN DATA MD I am using PSK D. I have tried changing settings in DATA MD ie data A, on the k3 but no change. In DX4Win I have the mode box ticked for PSK31 RTTY. I have also un-checked RTTY in dx4win but it still defaults to RTTY...weird ! Thanks Ken..G0ORH __ 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] K3DVR Tally output
I dont see a DVR 1.04 on the beta site, is it available somewhere? Jim K4JAF - Original Message - From: Alexandr Kobranov kobra...@amoscz.cz To: David Pratt da...@g4dmp.fsnet.co.uk Cc: Elecraft elecraft@mailman.qth.net Sent: Saturday, September 11, 2010 2:48 AM Subject: Re: [Elecraft] K3DVR Tally output Is there DVR f/w 1.04 somewhere published? In beta 4.10 is not included. In release notes related to 4.10 (respectively 4.06) mentioned - Also added support added for latest KDVR3 firmware revision (1.04). 73! Lexa, OK1DST 2010/9/11 David Pratt da...@g4dmp.fsnet.co.uk The latest 4.10 beta firmware provides additional K3DVR features and they work well, but I would also like to see a Record time counter similar to that currently available for Playback. 73 de David G4DMP In a recent message, Nick Winter K7MO wj...@blarg.net wrote ... Please excuse if this subject has been beaten to death. Is there a way to provide a change of state or output on any of the Aux I/O pins ONLY when the K3DVR is playing on the air. I'm looking for a way to mute my microphone during DVR playback. -- +- - - - - - - - - - - - - - - - - - - - -+ | David M Pratt G4DMP, Kippax, Leeds, UK | | K1 #1117; KX1 #0052; K2 #1583; K3 #0186 | +- - - - - - - - - - - - - - - - - - - - -+ __ 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 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] K3DVR FIrmware
DVR production firmware may be 1.03 or 1.04. 1.04 is not an upgrade of 1.03 and offers no new features. 73, Lyle KK7P Is there DVR f/w 1.04 somewhere published? __ 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] CNC Heavy K2/K3 knobs
$228 for both knobs for our K3's ? NO WAY ! AD4C If you see a driver handling a cell phone on her/his hands while driving,do please stay away from that vehicle,its a moving bomb.Your life is at danger.Keep yourself and your family alive --- On Sat, 9/11/10, Mark Stennett m...@stennett.com wrote: From: Mark Stennett m...@stennett.com Subject: Re: [Elecraft] CNC Heavy K2/K3 knobs To: elecraft@mailman.qth.net Date: Saturday, September 11, 2010, 5:26 AM Adds almost another pound to the DXpedition radio... On 9/10/2010 10:33 PM, Richard S. Lindzen wrote: $150 plus heavy enough to bend shafts. Wow. Dick, WO1I At 10:31 PM 9/10/2010, GEORGE CORTEZ wrote: Found these on the net and thought some of you may like this A bit on the pricey side http://www.73cnc.com/73cnc/elecraft.html George NE2I __ 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 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 RF probe needed
I recently purchased a very early K2 which came to me without the RF probe. If there is one out there unused or unbuilt, I would like to acquire it. -- 73 Allan K7GT __ 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 RFI in transmitted audio
Hi Jim Here is the setup: rig A: K3 heil proset on front panel pc audio on rear plugs cat plugged via microham microkeyer nothing plugged on cw key jack (that minimized rfi a bit, it was coming from microkeyer) JRC 1kw amp rig B ft2000 cat cable to pc icom pw1 amp The antennas are all near the shack. When rig B TX, depending on band, it gets into K3 TX audio. 2010/9/11 Jim Brown j...@audiosystemsgroup.com: On Fri, 10 Sep 2010 21:35:49 -0300, Felipe Ceglia wrote: When second rig is TX on 80m, I get the whole audio being coupled by the K3. Please give more detail about your problem. Are both radios transmitting at the same time? Both K3s, or one a different radio? Is there a computer feeding either radio? Where do you hear the RFI? Where do the radios get their DC power? Exactly. What kind of power supply? Is the V- terminal bonded to the chassis at the power supply? Is this a common issue? It depends on the details of your problem. Any tips to solve? It depends on the details of your problem. :) Once we hear more details, we can give some ideas. 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 -- Felipe Ceglia - PY1NB - PR1T team member /// Rio DX Group member /// Araucaria DX Group member http://www.dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.dxwatch.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] CNC Heavy K2/K3 knobs
George, I think they look great and I've never liked wimpy light weight tuning knobs. My wife was asking for b-day ideas and that was what I gave her since she's much more comfortable buying bling than technology. I sent her the weblink and didn't hear anything about it for a few days. Then one afternoon she came down to the ham shack and was looking at my K3 and asked why that radio in the picture I sent her was only $180 and I had to pay a couple of grand for mine. So I told her the $180 was just for the knobs..She looked at me and said you must be crazy and walked out. I was really hoping to end up with a set of those that I could claim someone else bought. Oh well. 73 Jack KZ5A On 9/10/2010 9:31 PM, GEORGE CORTEZ wrote: Found these on the net and thought some of you may like this A bit on the pricey side http://www.73cnc.com/73cnc/elecraft.html George NE2I __ 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] Simultaneously listening to 2m and 6m
We seem to experience what appears as a software anomaly when trying to listen to 2m on the Main VFO and 6 m on the Sub. Our club station has a K3 with a sub-rx, a K144XV interal 2 m option and an extermal XV432. A 6 m antenna is connected to Ant2, and HF-antenna to Ant1. The 2m option works fine by itself, as well as HF/6m. When we set it up to listen to a 6 m beacon on the Sub-rx and switch bands through HF/6m/2m/70 cm on the Main rx, then sometimes all works fine. Other times the input signal seems to disconnect from the 6 m sub rx when we come to 2 meters on the main rx, all other combinations are fine (HF/6m/70 cm on the main). We try to use Bset and switch Ant1/Ant2 on the sub, but it does not help, neither does holding RX ant for antenna switching. It is a problem which is kind of hard to reproduce, but it appears often enough to be annoying. So far we cannot predict what combinations of settings that cause this. But I wonder if others have experienced anything similar? - Sverre, LA3ZA K2 #2198, K3 #3391 http://www.qslnet.de/member/la3za/K2/mod.html LA3ZA Unofficial Guide to K2 modifications -- View this message in context: http://elecraft.365791.n2.nabble.com/Simultaneously-listening-to-2m-and-6m-tp5521449p5521449.html Sent from the [K3] 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 RFI in transmitted audio
Felipe If you are using external speakers with built-in audio amps, they can cause this problem. I solved the problem by turning the speaker amp volume down to less than ¼, and turning up the K3 audio to compensate. 73, Fred, AE6IC, K3 2241, P3 100 Do or Do-not. There is no 'Try'... ~ Yoda __ 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 RFI in transmitted audio
When rig B TX, depending on band, it gets into K3 TX audio. Use standard audio decoupling techniques ... use separate power supplies for each transceiver and the microKEYER. Do not use Mic + Line with the K3, make sure that any external power supply does not tie V- to chassis (and/or third pin on the power cable), add decoupling (common mode) chokes to the power supply cables, use common mode chokes on all antenna cables and don't transmit on both radios at the same time. 73, ... Joe, W4TV On 9/11/2010 9:37 AM, Felipe Ceglia wrote: Hi Jim Here is the setup: rig A: K3 heil proset on front panel pc audio on rear plugs cat plugged via microham microkeyer nothing plugged on cw key jack (that minimized rfi a bit, it was coming from microkeyer) JRC 1kw amp rig B ft2000 cat cable to pc icom pw1 amp The antennas are all near the shack. When rig B TX, depending on band, it gets into K3 TX audio. 2010/9/11 Jim Brownj...@audiosystemsgroup.com: On Fri, 10 Sep 2010 21:35:49 -0300, Felipe Ceglia wrote: When second rig is TX on 80m, I get the whole audio being coupled by the K3. Please give more detail about your problem. Are both radios transmitting at the same time? Both K3s, or one a different radio? Is there a computer feeding either radio? Where do you hear the RFI? Where do the radios get their DC power? Exactly. What kind of power supply? Is the V- terminal bonded to the chassis at the power supply? Is this a common issue? It depends on the details of your problem. Any tips to solve? It depends on the details of your problem. :) Once we hear more details, we can give some ideas. 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 DX4Win
Ken, I use DX4WIN with my K3 and I notice the same issue. I do not use PSK31 very often and when I do I have the change the mode manually within DX4WIN. This is more than likely a DX4WIN issue with the rig control file for the K3. The software is probably not recognizing the Data A or Data D modes on the K3 and by default assigns RTTY. N1MM contest software provides a way to map the modes in the Configurator. I would think some modification of the rig control file for the K3 is needed in DX4WIN. I would refer this to the DX4WIN reflector. Dave, N4QS - Original Message - From: ken chandler g0...@sky.com To: elecraft@mailman.qth.net Sent: Saturday, September 11, 2010 4:37 AM Subject: [Elecraft] K3 DX4Win Hi Gang Anyone using DX4Win with the K3, The MODE in DX4win will not recognize PSK31 on k3 and is defaulting to RTTY mode. IN DATA MD I am using PSK D. I have tried changing settings in DATA MD ie data A, on the k3 but no change. In DX4Win I have the mode box ticked for PSK31 RTTY. I have also un-checked RTTY in dx4win but it still defaults to RTTY...weird ! Thanks Ken..G0ORH __ 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] OT SDR.com as 2nd RX for K3
I just added a P3 to my K3, there by freeing up the computer from it's panadapter tasks. I had been using SDR-IF through LP-Bridge and DXLab HRD Bridge, so I could sync HRD and DXLab with the K3's frequency, and see 96khz of the band around me on SDR-IF. Now that I am running the K3/P3 combination, I can run SDR-Radio.com as my 2nd receiver, I just add it to one of the virtual ports on the LP-Bridge, then I can click on anything within the Delta 44's 96khz, and listen to them with out loosing where the K3/P3 are set. Sorry if this is already old news for some of you, it's a new toy for me, using the SoftRock Lite, which I already had and was using for, my homebrew K3/Z1/Softrock Lite/ panadapter, until I can come up with the funds for the KRX3 sub receiver. at least the KRX3 will be $100 cheaper than the P3 was, yea, we won't talk about the filters I'll need... one garbage bag of aluminum 807 cans at a time, right? hi hi Off topic: I only use DXLab for my VE7CC DX Cluster connection, I have never been able to stay connected using HRD, nor been able to keep the spots when I was dropped and reconnected. -- GB 73 K5OAI Sam Morgan __ 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 RFI in transmitted audio
On Sat, 11 Sep 2010 13:37:49 +, Felipe Ceglia wrote: Here is the setup: rig A: K3 heil proset on front panel pc audio on rear plugs cat plugged via microham microkeyer nothing plugged on cw key jack (that minimized rfi a bit, it was coming from microkeyer) JRC 1kw amp rig B ft2000 cat cable to pc icom pw1 amp The antennas are all near the shack. When rig B TX, depending on band, it gets into K3 TX audio. You still didn't tell us about DC power for these rigs and the other equipment. That can be VERY important for problems like these. Note W4TV's advice on this. Based on limited information, I suspect a pin 1 problem in the computer, but I'm not ready to rule out the power supply, and strongly urge you to follow Joe's advice. If RF is getting into the computer, the solution is a multi-turn choke on the audio cable between PC and the K3, and another on the serial cable. I think you said 80M was the primary band. That will take a lot of turns. See my RFI tutorial. http://audiosystemsgroup.com/RFI-Ham.pdf So I repeat my question about power -- EXACTLY how are you powering each rig and each piece of equipment connected to these rigs? I don't know the FT2000. Does the FT2000 run on 14Vdc, or does it plug directly into mains power? 73, Jim Brown K9YC 2010/9/11 Jim Brown j...@audiosystemsgroup.com: On Fri, 10 Sep 2010 21:35:49 -0300, Felipe Ceglia wrote: When second rig is TX on 80m, I get the whole audio being coupled by the K3. Please give more detail about your problem. Are both radios transmitting at the same time? Both K3s, or one a different radio? Is there a computer feeding either radio? Where do you hear the RFI? Where do the radios get their DC power? Exactly. What kind of power supply? Is the V- terminal bonded to the chassis at the power supply? Is this a common issue? __ 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 RFI in transmitted audio
2010/9/11 Felipe Ceglia felipecegl...@gmail.com: well... FT2000 is fed by its own internal PS. K3 is being fed by an alinco DM330 PS, and I have wounded a choke on a flyback toroid on the K3 red/black PS wire. (I havent actually checked its characteristics on VNA) microham is being fed from K3 12v port. I use no external speaker, but a heil headset the RFI gets into TX audio, blurring it a bit. I cant stop TX 2 rigs at once, as we are running WAE contest, and we are alowed to do so. Probably computer tied to k3 has pin 1 problem, as I am using its onboard soundcard. I will replace it later with a pci soundcard with pin1 fixed. Thanks for your help attention, Felipe - PY1NB 2010/9/11 Joe Subich, W4TV li...@subich.com: When rig B TX, depending on band, it gets into K3 TX audio. Use standard audio decoupling techniques ... use separate power supplies for each transceiver and the microKEYER. Do not use Mic + Line with the K3, make sure that any external power supply does not tie V- to chassis (and/or third pin on the power cable), add decoupling (common mode) chokes to the power supply cables, use common mode chokes on all antenna cables and don't transmit on both radios at the same time. 73, ... Joe, W4TV On 9/11/2010 9:37 AM, Felipe Ceglia wrote: Hi Jim Here is the setup: rig A: K3 heil proset on front panel pc audio on rear plugs cat plugged via microham microkeyer nothing plugged on cw key jack (that minimized rfi a bit, it was coming from microkeyer) JRC 1kw amp rig B ft2000 cat cable to pc icom pw1 amp The antennas are all near the shack. When rig B TX, depending on band, it gets into K3 TX audio. 2010/9/11 Jim Brownj...@audiosystemsgroup.com: On Fri, 10 Sep 2010 21:35:49 -0300, Felipe Ceglia wrote: When second rig is TX on 80m, I get the whole audio being coupled by the K3. Please give more detail about your problem. Are both radios transmitting at the same time? Both K3s, or one a different radio? Is there a computer feeding either radio? Where do you hear the RFI? Where do the radios get their DC power? Exactly. What kind of power supply? Is the V- terminal bonded to the chassis at the power supply? Is this a common issue? It depends on the details of your problem. Any tips to solve? It depends on the details of your problem. :) Once we hear more details, we can give some ideas. 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 -- Felipe Ceglia - PY1NB - PR1T team member /// Rio DX Group member /// Araucaria DX Group member http://www.dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.dxwatch.com -- Felipe Ceglia - PY1NB - PR1T team member /// Rio DX Group member /// Araucaria DX Group member http://www.dxwatch.com /// http://reversebeacon.net /// http://riodxgroup.dxwatch.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] CNC Heavy K2/K3 knobs
I bought a set for my K3 at Dayton last May out back in the flea on a 'program special' price. Still expensive but a beautiful custom addition to my radio. They are great. If you decide to get a set you will love them Having just recently survived a heart attack, my perspective on money and costs has been materially readjusted. YMMV :-) 73 de N1LQ-Dave __ 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 RF probe needed
Allen, Elecraft has the RF Probe kits for individual purchase, or you can build your own on perfboard. 73, Don W3FPR On 9/11/2010 9:18 AM, Allan Taylor wrote: I recently purchased a very early K2 which came to me without the RF probe. If there is one out there unused or unbuilt, I would like to acquire 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] K3 RFI in transmitted audio
Hi Felipe, microham is being fed from K3 12v port. This is not a good idea. Repeating W4TV's warning with a different choice of words The 12V at the K3 will vary up and down according to the audio current draw, at an audio rate. This variation in the 12V will now modulate anything else that uses it including audio circuits in the uHam gear. Depending on the characteristics this could cause the transmission from one rig to appear in the other. Even without uHam or other utility low level audio boxes, the same thing can happen with the two rigs if they share the same power supply. It would likely be a muddled sounding audio crosstalk, but based upon the degree of DC filtering in a rig or device, could be quite loud. Always run a separate small power supply to feed uHam devices and low level audio station utility gizmo's. Always use separate DC power supplies for SSB transceivers operated concurrently: one supply per transceiver. You can get away with mixed supply leads on CW, but NOT on SSB. 73, Guy. __ 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] Passband tuning quirk
Hi all, Operating in the WAE contest I am experiencing a quirk with the passband control knobs and displays that I haven't noticed before. My operating habit in SSB is to use the HiCut/LoCut mode, generally leaving the LoCut at 300Hz and use the HiCut as a QRM fighting tool. This works beautifully for me. If I am in doubt what my current passband is, I press either button twice to see what its setting is. Here is where the quirk comes in. I am currently working with a passband of 300-2300 Hz, at least that what the buttons report after the 2nd press. But after the first press the HI/WIDTH button reports a BW of 2050Hz which is off by 50Hz. My firmware version is 4.05 / 2.60. This, of course is no big deal, but I wish after more than two years of firmware upgrades we could get this perfected. There are still problems with the graphic representation of the passband so that can't be relied upon either. AB2TC - Knut -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Passband-tuning-quirk-tp5522141p5522141.html Sent from the [K3] 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 announcement
No one has come forward to do the net tomorrow (9/12/10 at 1800z on 14.314 MHz). I hope someone will answer the call at net time. Good luck. I'll see you next week. 73, Phil, NS7P On Sep 9, 2010, at 5:29 PM, Phil and Christina ph...@rio.com wrote: I will not be able to conduct the Elecraft SSB net this Sunday. The fellows who have occasionally filled in for me can't do it either. So, we need someone to step forward and take the net this week. The net meets at 1800Z on Sundays on or about 14.314 MHz. It is a fun group and very informal. Why not throw your hat in and give it a go. It would be helpful if you have a bit of power (500 watts or so) and a good antenna. Otherwise, it's not very demanding. 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] Elecraft SSB net announcement
Phil, How about giving us a little help on what is required, Preamble, a roster of sorts, how long the net is, etc. It might prompt someone to pitch in. Mel, K6KBE --- On Sat, 9/11/10, Phil Shepard ph...@riousa.com wrote: From: Phil Shepard ph...@riousa.com Subject: [Elecraft] Elecraft SSB net announcement To: elecraft@mailman.qth.net Date: Saturday, September 11, 2010, 2:35 PM No one has come forward to do the net tomorrow (9/12/10 at 1800z on 14.314 MHz). I hope someone will answer the call at net time. Good luck. I'll see you next week. 73, Phil, NS7P On Sep 9, 2010, at 5:29 PM, Phil and Christina ph...@rio.com wrote: I will not be able to conduct the Elecraft SSB net this Sunday. The fellows who have occasionally filled in for me can't do it either. So, we need someone to step forward and take the net this week. The net meets at 1800Z on Sundays on or about 14.314 MHz. It is a fun group and very informal. Why not throw your hat in and give it a go. It would be helpful if you have a bit of power (500 watts or so) and a good antenna. Otherwise, it's not very demanding. 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 __ 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] Passband tuning quirk
I have beta firmware 4.10 and I just went through your procedure below. Mine tracks correctly. I get the correct numbers. I seem to recall some text about what you report some while back, so it seems it has had some attention paid to it. Does not sound like it's keeping you from hearing anything or adjusting it. But you can try the beta version: ftp://ftp.elecraft.com/K3/firmware/beta/k3fw4r10.zip 73, Guy. On Sat, Sep 11, 2010 at 4:17 PM, ab2tc ab...@arrl.net wrote: Hi all, Operating in the WAE contest I am experiencing a quirk with the passband control knobs and displays that I haven't noticed before. My operating habit in SSB is to use the HiCut/LoCut mode, generally leaving the LoCut at 300Hz and use the HiCut as a QRM fighting tool. This works beautifully for me. If I am in doubt what my current passband is, I press either button twice to see what its setting is. Here is where the quirk comes in. I am currently working with a passband of 300-2300 Hz, at least that what the buttons report after the 2nd press. But after the first press the HI/WIDTH button reports a BW of 2050Hz which is off by 50Hz. My firmware version is 4.05 / 2.60. This, of course is no big deal, but I wish after more than two years of firmware upgrades we could get this perfected. There are still problems with the graphic representation of the passband so that can't be relied upon either. AB2TC - Knut -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Passband-tuning-quirk-tp5522141p5522141.html Sent from the [K3] 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 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] P3 Misbehaving?
Just assembled P3 a few days ago. Having a problem that I can't seem to solve. Background: Haven't done K3 OUT mod yet (SN 113 fairly old) ... really am apprehensive about opening up K3 again ... but I know I'm just being neurotic ... will face any weekend now). The P3 was pretty much performing as expected ... given that I haven't done the above mode yet, and I live in manhattan with a mediocre hamstick hung outside my window .. I could generally see strongest stations above a lot of noise on P3. That was good. But over past few days, it seems that the sensitivity of the device was diminishing .. started to have trouble seeing the few stations that I could actually hear above the noise on my K3 ... and then today, it now appears that the P3 is basically deaf to the K3 ... I see some low ampitude noise, which doesn't vary in appearance with or without the coax cable to the IF OUT of the K3 plugged in. I am listening to a fairly strong Italian CW station now on 20 meters now, sticking his head above the omnipresent S5-6 noise ... armchair copy, if you will, but all I see is noise at the bottom of the P3 screen. The center frequency tracks my K3 nicely ... but no matter how I adjust the REF, SCALE and SPAN, all I see is noise. Any thoughts would be welcome. Yes, I will dive in and do the IF OUT mod, but am trying to understand the curious behavior, and to see if it sounds familiar to anyone. Thanks in advance -- WB2SSB Joseph J. Sanger, M.D. Associate Professor of Radiology Director, Radiology Informatics This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email. = __ 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] P3 Misbehaving?
Idea: Change in propagation causes different band noise levels. Same with geomagnetic activity, number of neighbors in the building, you name it. matt W6NIA K3 #24 P3 #14 On Sat, 11 Sep 2010 18:34:26 -0400, you wrote: Just assembled P3 a few days ago. Having a problem that I can't seem to solve. Background: Haven't done K3 OUT mod yet (SN 113 fairly old) ... really am apprehensive about opening up K3 again ... but I know I'm just being neurotic ... will face any weekend now). The P3 was pretty much performing as expected ... given that I haven't done the above mode yet, and I live in manhattan with a mediocre hamstick hung outside my window .. I could generally see strongest stations above a lot of noise on P3. That was good. But over past few days, it seems that the sensitivity of the device was diminishing .. started to have trouble seeing the few stations that I could actually hear above the noise on my K3 ... and then today, it now appears that the P3 is basically deaf to the K3 ... I see some low ampitude noise, which doesn't vary in appearance with or without the coax cable to the IF OUT of the K3 plugged in. I am listening to a fairly strong Italian CW station now on 20 meters now, sticking his head above the omnipresent S5-6 noise ... armchair copy, if you will, but all I see is noise at the bottom of the P3 screen. The center frequency tracks my K3 nicely ... but no matter how I adjust the REF, SCALE and SPAN, all I see is noise. Any thoughts would be welcome. Yes, I will dive in and do the IF OUT mod, but am trying to understand the curious behavior, and to see if it sounds familiar to anyone. Thanks in advance -- WB2SSB Joseph J. Sanger, M.D. Associate Professor of Radiology Director, Radiology Informatics This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email. = __ 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] SSB and WSJT
I use my K3 as a driver using the transverter output to drive my 1296 Transverter for EME. I have a problem, I will try to explain in full. On WSJT I use a Navigator interface to the LINE IN to operate the K3 and the PTT is controlled by the Navigator on Com 4, and the K3 operates perfectly. MIC SEL is set to LINE IN, and MIC + LINE NOT APPL. Everything perfect, good signals. Set up as it is, I can ping the moon to check my echo, by pushing the XMIT button, with the K3 in USB and then see my echo on the computer software a couple of seconds later. The problem comes when I try to operate SSB on EME, (and CW). I have set VOX off, MIC SEL to FPL and Bias is on, (for the Heil headset), Pushing the XMIT button to start transmitting, then start talking, I can see the audio being transmitted, and the Bird Wattmeter on the amp output showing the voice output BUT then after a few seconds the amp goes to full output, just as if I had pushed the XMIT button in the desciption above.. Ideas please, The XMIT is also the TUNE button is it possible the K3 is going into TUNE mode, that could explain the amp going to full power. I need to sort this problem before I start on CW. Best wishes Ross ZL1WN __ 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 RFI in transmitted audio
This is not a good idea. Repeating W4TV's warning with a different choice of words Actually, using +13.8V *from the transceiver* is not a major issue since there is no current return via the microHAM interface (or any other accessory device). The big problem is with using the same supply as the transceiver and connecting at the power supply end of the transceiver power cable because a portion of the transceiver return current flows through the microHAM interface (or other accessory device). That return current modulates the V- line of the accessory and puts the voltage drop on the accessory V- line in series with the microphone audio! The variable voltage on the accessory V- is often in the 10 to 50 mV range - equivalent to the level of many microphones! The problem with the K3 +12V jack is the two series diodes and the power switch FET between the +13.8V input and the switched power output. The voltage drop is rather significant and can be quite variable under load Always use separate DC power supplies for SSB transceivers operated concurrently: one supply per transceiver. This is good advice ... and always bond the chassis of each piece of equipment to the common ground point and not chassis to chassis. 73, ... Joe, W4TV On 9/11/2010 3:02 PM, Guy Olinger K2AV wrote: Hi Felipe, microham is being fed from K3 12v port. This is not a good idea. Repeating W4TV's warning with a different choice of words The 12V at the K3 will vary up and down according to the audio current draw, at an audio rate. This variation in the 12V will now modulate anything else that uses it including audio circuits in the uHam gear. Depending on the characteristics this could cause the transmission from one rig to appear in the other. Even without uHam or other utility low level audio boxes, the same thing can happen with the two rigs if they share the same power supply. It would likely be a muddled sounding audio crosstalk, but based upon the degree of DC filtering in a rig or device, could be quite loud. Always run a separate small power supply to feed uHam devices and low level audio station utility gizmo's. Always use separate DC power supplies for SSB transceivers operated concurrently: one supply per transceiver. You can get away with mixed supply leads on CW, but NOT on SSB. 73, Guy. __ 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] P3 Misbehaving?
Is the noise floor on the P3 stuck at -140 dBm or so all the time, no matter what? I experienced a similar problem after 2 weeks of use, and replacement of the P3 RF board was required. Apparently, I was informed, another cause can be handling damage to transformers T100 or T101 on the P3 Front Panel board, so you might take a look at them. I sure wish the P3 schematic was available at the time, it would have made troubleshooting a little easier (it's still not published AFAICS). As usual, Elecraft support was prompt and efficient, I'd contact them if there's no change. Bob NW8L On Sat, Sep 11, 2010 at 4:34 PM, Sanger, Joseph joseph.san...@nyumc.org wrote: Just assembled P3 a few days ago. Having a problem that I can't seem to solve. Background: Haven't done K3 OUT mod yet (SN 113 fairly old) ... really am apprehensive about opening up K3 again ... but I know I'm just being neurotic ... will face any weekend now). The P3 was pretty much performing as expected ... given that I haven't done the above mode yet, and I live in manhattan with a mediocre hamstick hung outside my window .. I could generally see strongest stations above a lot of noise on P3. That was good. But over past few days, it seems that the sensitivity of the device was diminishing .. started to have trouble seeing the few stations that I could actually hear above the noise on my K3 ... and then today, it now appears that the P3 is basically deaf to the K3 ... I see some low ampitude noise, which doesn't vary in appearance with or without the coax cable to the IF OUT of the K3 plugged in. I am listening to a fairly strong Italian CW station now on 20 meters now, sticking his head above the omnipresent S5-6 noise ... armchair copy, if you will, but all I see is noise at the bottom of the P3 screen. The center frequency tracks my K3 nicely ... but no matter how I adjust the REF, SCALE and SPAN, all I see is noise. Any thoughts would be welcome. Yes, I will dive in and do the IF OUT mod, but am trying to understand the curious behavior, and to see if it sounds familiar to anyone. Thanks in advance -- WB2SSB Joseph J. Sanger, M.D. Associate Professor of Radiology Director, Radiology Informatics __ 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] P3 Misbehaving?
and then today, it now appears that the P3 is basically deaf to the K3 ... I see some low ampitude noise, which doesn't vary in appearance with or without the coax cable to the IF OUT of the K3 plugged in. OM, On a K3 with the IF OUT modification, you should definitely see the noise level on the P3 go down when you disconnect the coax that goes from the K3 IF OUT to the P3 IF IN. I don't have a K3 without the mod to test with, but I'm pretty sure that, even in that case, if you turn on the K3's preamp you should still see a change in noise level when you disconnect the coax. If not, there is something wrong. First check the coax cable to be sure it is properly seated at both the K3 and P3 end. If you have another BNC coax cable available you might try it to see if the problem is a bad cable. You could also pop the top off the P3 and check the small coax cable that goes from the rear-panel amplifier board to the Front Panel board. Push with a twisting motion on the connector on each end to be sure it is well-seated in the receptacle. (On the amplifier board, support the board with your fingers while you do this to avoid flexing the board.) If none of that helps I would contact Elecraft customer support and get their recommendations on the next step. Alan N1AL On Sat, 2010-09-11 at 18:34 -0400, Sanger, Joseph wrote: Just assembled P3 a few days ago. Having a problem that I can't seem to solve. Background: Haven't done K3 OUT mod yet (SN 113 fairly old) ... really am apprehensive about opening up K3 again ... but I know I'm just being neurotic ... will face any weekend now). The P3 was pretty much performing as expected ... given that I haven't done the above mode yet, and I live in manhattan with a mediocre hamstick hung outside my window .. I could generally see strongest stations above a lot of noise on P3. That was good. But over past few days, it seems that the sensitivity of the device was diminishing .. started to have trouble seeing the few stations that I could actually hear above the noise on my K3 ... and then today, it now appears that the P3 is basically deaf to the K3 ... I see some low ampitude noise, which doesn't vary in appearance with or without the coax cable to the IF OUT of the K3 plugged in. I am listening to a fairly strong Italian CW station now on 20 meters now, sticking his head above the omnipresent S5-6 noise ... armchair copy, if you will, but all I see is noise at the bottom of the P3 screen. The center frequency tracks my K3 nicely ... but no matter how I adjust the REF, SCALE and SPAN, all I see is noise. Any thoughts would be welcome. Yes, I will dive in and do the IF OUT mod, but am trying to understand the curious behavior, and to see if it sounds familiar to anyone. Thanks in advance -- WB2SSB Joseph J. Sanger, M.D. Associate Professor of Radiology Director, Radiology Informatics This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email. = __ 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 RFI in transmitted audio
Joe, Let me rephrase your point and add a bit more. Any accessories that are used during transmit would best be powered by a supply different than the transceiver power supply. Strange modulation of the V- line to the accessory can result, especially with SSB transmission, but possible with other modes as well. If the accessory is only used during receive, it can use the same supply as the transceiver because the current draw of the transceiver is constant during receive. 73, Don W3FPR On 9/11/2010 8:06 PM, Joe Subich, W4TV wrote: This is not a good idea. Repeating W4TV's warning with a different choice of words Actually, using +13.8V *from the transceiver* is not a major issue since there is no current return via the microHAM interface (or any other accessory device). The big problem is with using the same supply as the transceiver and connecting at the power supply end of the transceiver power cable because a portion of the transceiver return current flows through the microHAM interface (or other accessory device). That return current modulates the V- line of the accessory and puts the voltage drop on the accessory V- line in series with the microphone audio! The variable voltage on the accessory V- is often in the 10 to 50 mV range - equivalent to the level of many microphones! The problem with the K3 +12V jack is the two series diodes and the power switch FET between the +13.8V input and the switched power output. The voltage drop is rather significant and can be quite variable under load Always use separate DC power supplies for SSB transceivers operated concurrently: one supply per transceiver. This is good advice ... and always bond the chassis of each piece of equipment to the common ground point and not chassis to chassis. 73, __ 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] P3 Misbehaving?
The noise floor shifts by 10 db each time I make a change to the PRE or ATT switch ... resulting in 3 separate noise floor levels. But you are right, the RF board turned out to be the problem! You will see on my next post, the final chapter. Thanks very much, Bob. -Original Message- From: Bob Cunnings [mailto:bob.cunni...@gmail.com] Sent: Saturday, September 11, 2010 8:10 PM To: Sanger, Joseph Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] P3 Misbehaving? Is the noise floor on the P3 stuck at -140 dBm or so all the time, no matter what? I experienced a similar problem after 2 weeks of use, and replacement of the P3 RF board was required. Apparently, I was informed, another cause can be handling damage to transformers T100 or T101 on the P3 Front Panel board, so you might take a look at them. I sure wish the P3 schematic was available at the time, it would have made troubleshooting a little easier (it's still not published AFAICS). As usual, Elecraft support was prompt and efficient, I'd contact them if there's no change. Bob NW8L On Sat, Sep 11, 2010 at 4:34 PM, Sanger, Joseph joseph.san...@nyumc.org wrote: Just assembled P3 a few days ago. Having a problem that I can't seem to solve. Background: Haven't done K3 OUT mod yet (SN 113 fairly old) ... really am apprehensive about opening up K3 again ... but I know I'm just being neurotic ... will face any weekend now). The P3 was pretty much performing as expected ... given that I haven't done the above mode yet, and I live in manhattan with a mediocre hamstick hung outside my window .. I could generally see strongest stations above a lot of noise on P3. That was good. But over past few days, it seems that the sensitivity of the device was diminishing .. started to have trouble seeing the few stations that I could actually hear above the noise on my K3 ... and then today, it now appears that the P3 is basically deaf to the K3 ... I see some low ampitude noise, which doesn't vary in appearance with or without the coax cable to the IF OUT of the K3 plugged in. I am listening to a fairly strong Italian CW station now on 20 meters now, sticking his head above the omnipresent S5-6 noise ... armchair copy, if you will, but all I see is noise at the bottom of the P3 screen. The center frequency tracks my K3 nicely ... but no matter how I adjust the REF, SCALE and SPAN, all I see is noise. Any thoughts would be welcome. Yes, I will dive in and do the IF OUT mod, but am trying to understand the curious behavior, and to see if it sounds familiar to anyone. Thanks in advance -- WB2SSB Joseph J. Sanger, M.D. Associate Professor of Radiology Director, Radiology Informatics This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email. = __ 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] P3 Misbehaving?
Matt, you are right ... I thought the K3 was dead ... but part of the problem is band conditions ... thanks for the comment. -Original Message- From: Matt Zilmer [mailto:mzil...@verizon.net] Sent: Saturday, September 11, 2010 7:40 PM To: Sanger, Joseph Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] P3 Misbehaving? Idea: Change in propagation causes different band noise levels. Same with geomagnetic activity, number of neighbors in the building, you name it. matt W6NIA K3 #24 P3 #14 On Sat, 11 Sep 2010 18:34:26 -0400, you wrote: Just assembled P3 a few days ago. Having a problem that I can't seem to solve. Background: Haven't done K3 OUT mod yet (SN 113 fairly old) ... really am apprehensive about opening up K3 again ... but I know I'm just being neurotic ... will face any weekend now). The P3 was pretty much performing as expected ... given that I haven't done the above mode yet, and I live in manhattan with a mediocre hamstick hung outside my window .. I could generally see strongest stations above a lot of noise on P3. That was good. But over past few days, it seems that the sensitivity of the device was diminishing .. started to have trouble seeing the few stations that I could actually hear above the noise on my K3 ... and then today, it now appears that the P3 is basically deaf to the K3 ... I see some low ampitude noise, which doesn't vary in appearance with or without the coax cable to the IF OUT of the K3 plugged in. I am listening to a fairly strong Italian CW station now on 20 meters now, sticking his head above the omnipresent S5-6 noise ... armchair copy, if you will, but all I see is noise at the bottom of the P3 screen. The center frequency tracks my K3 nicely ... but no matter how I adjust the REF, SCALE and SPAN, all I see is noise. Any thoughts would be welcome. Yes, I will dive in and do the IF OUT mod, but am trying to understand the curious behavior, and to see if it sounds familiar to anyone. Thanks in advance -- WB2SSB Joseph J. Sanger, M.D. Associate Professor of Radiology Director, Radiology Informatics This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email. = __ 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 This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email. = __ 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] P3 Misbehaving?
Well, I am happy / embarrassed to say, problem solved. Alan, your troubleshooting tips led me to the solution. I am closing the loop on this, in spite of my embarrassment, in order to possibly save someone else this problem. The problem was simply carelessness on my part. I had installed the RF board upside down ... guess what, it physically fits either right side up or upside down .. the only apparent difference visually, from the back at least, is that the little dual-position switch ... doesn't poke out of the back slot when you install board upside down. D'oh! Flipping it right-side up solved my problem. What is odd is that it ever _sort_ of worked in the upside/down position. Well, thanks to all who offered comments ... I REALLY appreciate it. -- Joe -- WB2SSB -Original Message- From: Alan Bloom [mailto:n...@cds1.net] Sent: Saturday, September 11, 2010 9:04 PM To: Sanger, Joseph Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] P3 Misbehaving? and then today, it now appears that the P3 is basically deaf to the K3 ... I see some low ampitude noise, which doesn't vary in appearance with or without the coax cable to the IF OUT of the K3 plugged in. OM, On a K3 with the IF OUT modification, you should definitely see the noise level on the P3 go down when you disconnect the coax that goes from the K3 IF OUT to the P3 IF IN. I don't have a K3 without the mod to test with, but I'm pretty sure that, even in that case, if you turn on the K3's preamp you should still see a change in noise level when you disconnect the coax. If not, there is something wrong. First check the coax cable to be sure it is properly seated at both the K3 and P3 end. If you have another BNC coax cable available you might try it to see if the problem is a bad cable. You could also pop the top off the P3 and check the small coax cable that goes from the rear-panel amplifier board to the Front Panel board. Push with a twisting motion on the connector on each end to be sure it is well-seated in the receptacle. (On the amplifier board, support the board with your fingers while you do this to avoid flexing the board.) If none of that helps I would contact Elecraft customer support and get their recommendations on the next step. Alan N1AL On Sat, 2010-09-11 at 18:34 -0400, Sanger, Joseph wrote: Just assembled P3 a few days ago. Having a problem that I can't seem to solve. Background: Haven't done K3 OUT mod yet (SN 113 fairly old) ... really am apprehensive about opening up K3 again ... but I know I'm just being neurotic ... will face any weekend now). The P3 was pretty much performing as expected ... given that I haven't done the above mode yet, and I live in manhattan with a mediocre hamstick hung outside my window .. I could generally see strongest stations above a lot of noise on P3. That was good. But over past few days, it seems that the sensitivity of the device was diminishing .. started to have trouble seeing the few stations that I could actually hear above the noise on my K3 ... and then today, it now appears that the P3 is basically deaf to the K3 ... I see some low ampitude noise, which doesn't vary in appearance with or without the coax cable to the IF OUT of the K3 plugged in. I am listening to a fairly strong Italian CW station now on 20 meters now, sticking his head above the omnipresent S5-6 noise ... armchair copy, if you will, but all I see is noise at the bottom of the P3 screen. The center frequency tracks my K3 nicely ... but no matter how I adjust the REF, SCALE and SPAN, all I see is noise. Any thoughts would be welcome. Yes, I will dive in and do the IF OUT mod, but am trying to understand the curious behavior, and to see if it sounds familiar to anyone. Thanks in advance -- WB2SSB Joseph J. Sanger, M.D. Associate Professor of Radiology Director, Radiology Informatics This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email. = __ 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 SSB net announcement
Hi Phil: Since I don't have an amp, I hesitated to reply. Given no one else, I will try to help. I have 3 elements on 20m and 100w. Regards, 73 John N6JW K3 #936 -- View this message in context: http://elecraft.365791.n2.nabble.com/SSB-net-announcement-tp5251658p5522669.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 CW Net Announcement
Good Evening, A cool, wet week here. I just heard a frost advisory on the radio. Odd to think it is still summer and we may get frost. But there is some cheery news inside this cloud. There will be some sun and the temperatures will zoom into the high 60s again; there may even be a day or two above 70! I am waiting for them to remove the fire danger sign but there must be a traditional date for its removal. It has shown the lowest level for three weeks during our rains. I have not been on the radio at all this week other than some NTS stuff on 80 meters. Since everyone on the net is within a county or two there were no problems with copying them. MUF is well above what is necessary for good 80 meter propagation. Working with the NTS is good CW practice. Please join us tomorrow afternoon and evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) Sunday 2200z (Sunday 3 PM PDT) 14050 kHz Monday z (Sunday 5 PM PDT) 7045 kHz Stay well, Kevin. KD5ONS __ 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] P3 Misbehaving?
Alan's advice is pertinent because I found my P3's BNC-to-BNC coax cable to be open... swapping it with a known good one laying in my cable drawer solved that problem. Just a warning for anybody else to go ahead and suspect the cable (as well as everything else) if you don't see what you expect to see on the P3. Al W6LX OM, First check the coax cable to be sure it is properly seated at both the K3 and P3 end. If you have another BNC coax cable available you might try it to see if the problem is a bad cable. Alan N1AL __ 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
