[Elecraft] Strange K3 microphone /PTT fault
My thanks to all who helped with advice on this. It was L4 open circuit behind the mic socket. I'd have struggled to find this without this reflector. K3 now up and running again. 73 and thanks again. -- John Petters Amateur Radio Station G3YPZ www.traditional-jazz.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 Message delivered to arch...@mail-archive.com
[Elecraft] Strange K3 microphone /PTT fault
Greetings folks, I'm puzzled. my 7 year old K3 did two strange things this evening. During a CW QSO on 21MHz, it appeared not to go back into receive and required power off and on to operate. The QSO finished. Then, in the middle of a USB QSO on 5MHz - mid transmission, it went back to receive and the PTT would not go back to TX, nor did the Vox work. I can operate the PTT on the back socket of the rig, and by grounding pin 2 on the 8 pin mic connector. On measuring the pins 7 & 8, which should go to ground, these seem to be floating and not grounded. I've just looked at the circuit and it shows these pins going to ground. Any suggestions? 73 -- John Petters Amateur Radio Station G3YPZ www.traditional-jazz.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KUSB Noise Query - K3
Thanks Mike. Interesting article. 73 John On 13/12/2012 22:52, Mike Harris wrote: > A few years ago I was receiving noise from my PC on 6M, via the serial > interface cable. I was also receiving it when using the KUSB of the > time with the Prolific chip-set. > > I made a new serial cable using CAT-6 and the technique used in the > "K9YC RFI-Ham.pdf" tutorial, page 38. > > This significantly reduce the noise and interestingly when I placed it > in series with the KUSB it had the same effect. My new serial cable was > about 3 metres long and I was going to make up a short version to see if > it had the same effect. Unfortunately I never did. > > Regards, > > Mike VP8NO > > __ > 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 > > -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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] KUSB Noise Query - K3
I've done that, Buck, still noisy. Many Thanks, 73, John On 13/12/2012 21:57, Buck - k4ia wrote: > I have found that I must be sure to screw in (not just plug in) the > serial connector on the back of the K3. If I don't, I will hear a > pulsed rushing noise from the USB. > > > Buck > k4ia > > On 12/13/2012 12:53 PM, Matthew Zilmer wrote: >> USB uses differential signaling. Your problem may not be conductive >> noise, but instead it could be radiated directly from the adapter, >> where the ferrite won't help. >> >> KeySpan makes a USB - serial adapter that is pretty much noise-free. >> Its model is HS19, I think. >> >> Matt Zilmer >> Consultant - Product Management Dept. >> Magellan Navigation / MiTAC Digital Corp. >> Tel: (909) 394-6052 >> Cell: (909) 730-6552 >> In status quo voluntas non sufficit >> >> >> -Original Message- >> From: elecraft-boun...@mailman.qth.net >> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of john petters >> Sent: Thursday, December 13, 2012 9:25 AM >> To: elecraft@mailman.qth.net >> Subject: [Elecraft] KUSB Noise Query - K3 >> >> Hi Folks, >> I posted a query about K3 Serial ports a few months back - we could >> not get the K3 to work properly with the RS232 connection. It turned >> out to be a fault with the sound card, which took out the serial >> connections. >> When I first built the K3, I bought a cheap Prolific USB converter, >> which radiates awful noise over the spectrum. I decided to bite the >> bullet and buy the proper lead, which arrived today. >> >> Using my Toshiba laptop, on battery power, I get a couple of s points >> of noise on 10M with the KUSB connected and HRD fired up. This is >> using my >> 2 element DJ4VM quad, which is fed with 300 ohm twin into the shack, >> i.e. near the laptop. >> >> On LF, I can hear the pulsing information, in sympathy with the >> flashing LEDs on the KUSB on 160M at quite a high level. I can even >> detect this when fed into a Marconi dummy load. The K3 and the tuning >> units are bonder to an RF earth - a copper stake about 8 feet away >> from the K3. >> >> I have tried choking the USB lead at the laptop end, which does reduce >> the noise to a degree. >> >> The question I have is - am I being unrealistic in expecting zero >> noise to be radiated from these adaptors? >> Does anyone else have this problem - or has anyone looked for it? >> >> It is not very noticeable on CW or SSB. To hear it best, listen in the >> AM mode with the AGC off. On SSB it sounds like band noise. >> >> Is this a problem JUST with USB adaptors or can I expect silence when >> connecting a computer via RS232 to RS232. >> >> If not we are sacrificing a low noise floor for the convenience of >> computer control. >> >> Any views appreciated, >> >> 73 >> >> >> >> >> -- >> John Petters >> www.traditional-jazz.com >> Amateur Radio Station G3YPZ >> __ >> 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 > -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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] KUSB Noise Query - K3
Matt & Brian, thanks for the suggestions. This KUSB is the latest type, I believe with the FTDI chip set.. The old one I had was a Prolific chip set - but not a KUSB. I'll look up the HS19. 73 John On 13/12/2012 18:10, Brian Moran wrote: > You may try a different K-USB. I have a K-USB that radiated terrible > noise on 160m. A different one, quiet. > -Brian N9ADG > > > > *From:* Matthew Zilmer > *To:* john petters ; > "elecraft@mailman.qth.net" > *Sent:* Thursday, December 13, 2012 9:53 AM > *Subject:* Re: [Elecraft] KUSB Noise Query - K3 > > USB uses differential signaling. Your problem may not be conductive > noise, but instead it could be radiated directly from the adapter, where > the ferrite won't help. > > KeySpan makes a USB - serial adapter that is pretty much noise-free. > Its model is HS19, I think. > > Matt Zilmer > Consultant - Product Management Dept. > Magellan Navigation / MiTAC Digital Corp. > Tel: (909) 394-6052 > Cell: (909) 730-6552 > In status quo voluntas non sufficit > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > <mailto:elecraft-boun...@mailman.qth.net> > [mailto:elecraft-boun...@mailman.qth.net > <mailto:elecraft-boun...@mailman.qth.net>] On Behalf Of john petters > Sent: Thursday, December 13, 2012 9:25 AM > To: elecraft@mailman.qth.net <mailto:elecraft@mailman.qth.net> > Subject: [Elecraft] KUSB Noise Query - K3 > > Hi Folks, > I posted a query about K3 Serial ports a few months back - we could not > get the K3 to work properly with the RS232 connection. It turned out to > be a fault with the sound card, which took out the serial connections. > When I first built the K3, I bought a cheap Prolific USB converter, > which radiates awful noise over the spectrum. I decided to bite the > bullet and buy the proper lead, which arrived today. > > Using my Toshiba laptop, on battery power, I get a couple of s points of > noise on 10M with the KUSB connected and HRD fired up. This is using my > 2 element DJ4VM quad, which is fed with 300 ohm twin into the shack, > i.e. near the laptop. > > On LF, I can hear the pulsing information, in sympathy with the flashing > LEDs on the KUSB on 160M at quite a high level. I can even detect this > when fed into a Marconi dummy load. The K3 and the tuning units are > bonder to an RF earth - a copper stake about 8 feet away from the K3. > > I have tried choking the USB lead at the laptop end, which does reduce > the noise to a degree. > > The question I have is - am I being unrealistic in expecting zero noise > to be radiated from these adaptors? > Does anyone else have this problem - or has anyone looked for it? > > It is not very noticeable on CW or SSB. To hear it best, listen in the > AM mode with the AGC off. On SSB it sounds like band noise. > > Is this a problem JUST with USB adaptors or can I expect silence when > connecting a computer via RS232 to RS232. > > If not we are sacrificing a low noise floor for the convenience of > computer control. > > Any views appreciated, > > 73 > > > > > -- > John Petters > www.traditional-jazz.com <http://www.traditional-jazz.com/> > Amateur Radio Station G3YPZ > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net <mailto:Elecraft@mailman.qth.net> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net <mailto:Elecraft@mailman.qth.net> > > This list hosted by: http://www.qsl.net <http://www.qsl.net/> > Please help support this email list: http://www.qsl.net/donate.html > > -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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] KUSB Noise Query - K3
Hi Folks, I posted a query about K3 Serial ports a few months back - we could not get the K3 to work properly with the RS232 connection. It turned out to be a fault with the sound card, which took out the serial connections. When I first built the K3, I bought a cheap Prolific USB converter, which radiates awful noise over the spectrum. I decided to bite the bullet and buy the proper lead, which arrived today. Using my Toshiba laptop, on battery power, I get a couple of s points of noise on 10M with the KUSB connected and HRD fired up. This is using my 2 element DJ4VM quad, which is fed with 300 ohm twin into the shack, i.e. near the laptop. On LF, I can hear the pulsing information, in sympathy with the flashing LEDs on the KUSB on 160M at quite a high level. I can even detect this when fed into a Marconi dummy load. The K3 and the tuning units are bonder to an RF earth - a copper stake about 8 feet away from the K3. I have tried choking the USB lead at the laptop end, which does reduce the noise to a degree. The question I have is - am I being unrealistic in expecting zero noise to be radiated from these adaptors? Does anyone else have this problem - or has anyone looked for it? It is not very noticeable on CW or SSB. To hear it best, listen in the AM mode with the AGC off. On SSB it sounds like band noise. Is this a problem JUST with USB adaptors or can I expect silence when connecting a computer via RS232 to RS232. If not we are sacrificing a low noise floor for the convenience of computer control. Any views appreciated, 73 -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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 RS232 Query
Hi Dick, Just connected the USB adaptor to the serial lead on com 8, where it is, and opened Winlog32 OK with full control. Disconnected USB and plugged the serial lead into Com 1 and re-set the programme to Com 1 and it will display the the frequency as I spin the VFO, but I cannot control the K3 with the computer. I'm using the three wires as specified in the manual. Pins 2, 3 & 5. Do I need to connect the other two pins? Haven't got any other serial devices I can try, but no reason to believe the Com ports should be faulty. 73 John On 14/10/2012 22:34, Dick Dievendorff wrote: > Can another program find the K3 using your lead. serial port speed issue? Do > Com1 and 2 work with any other devices? Are the com ports OK in the Windows > device manager? > > Dick, K6KR -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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 RS232 Query
Hi folks, I made up a serial lead today to run from a window 2k computer which has a serial port. I've been using a Prolific USB / RS232 converter, which is very noisy. This, however connects to the K3 using HRD software and works correctly. The lead I made up uses 3 wires as the K3 manual suggests. There is no crossover. HRD will not see the K3. I tested the lead by connecting the USB converter to it and it worked perfectly with the new lead - so I don't think my lead is the problem. I tried all the available com ports (the USB lead works on Com 8) the RS232 should be on Com 1 or Com 2. Any suggestions? 73 -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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 PA Failure
--- Hi Folks, I have had another PA transistor failure in my 2003 vintage K2. The transistors have been replaced several times over the years and the board is now a mess. I'm planning to rebuild the PA on an external board with a proper heat sink mounted on the back panel of the K2. This will involve taking the secondary from the driver transformer on a piece of coax about 6 inches long. My query is what impedance is the secondary of T2 designed to work into and will I have a problem taking this to the external board? I've never liked the design of the mechanical fitting of the K2 PA and always regarded this as the Achilles Heel of the rig. Suggestions appreciated. 73 -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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 SWR reading fault with PA
Hi Folks, A problem occured last night. I have the K3 with the 100 watt PA. SWR with the QRP amp, i.e. below 12 watts is perfect according to the K3 meter. When I increase power the SWR goes high and so does the current. I tried this on dummy load and the same problem exists. One clue - there was a thunderstorm fairly close by. It was a rumble in the distance although the static crashes were loud. Does this indicate I may have popped the SWR diodes? Suggestions appreciated. 73 -- John Petters Amateur Radio Station G3YPZ www.traditional-jazz.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] To those that have the K2 and K3
Gary D Krause wrote: > Why do you still have both? The K2 is my main station rig. Hi Gary, For CW there is not a lot of practical difference under normal conditions. The K2 is streets ahead of most of the competition. I don't do contests so that isn't an issue. However the K3 is way ahead of the K2 on SSB. The DSP is really useful. I also use AM & FM which the K2 does not have. So you pays your money.. 73 John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ> > > > __ > 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] OT:The use of a doublet
Ron D'Eau Claire wrote: Extremely high currents can > flow at some points along the line, and large conductors help minimize the > ohmic losses in the line. For that reason, 300 ohm "twinlead" or 450 ohm > "ladder line" works, but has larger-than-necessary losses because of the > small diameter conductors those lines use. Whenever possible, I use a #12 or > larger wire for my open wire lines. > It will work well down to where the antenna is only 1/4 wavelength > end-to-end, showing only a small loss compared to a full size dipole. The > problem there is that the SWR on the feeder jumps up as the impedance drops > quickly at that size. > I noticed an improvement with my DJ4VM quad, which is a balanced 2 el design for 20M, but works with gain on the other HF bands. No problem on 20 and above, but I found that feeding it with 450 ohm twin on 30M where the impedance is low was a problem. I got round it by putting a 9:1 balun between the element and the line. Now, having beefed up the guage of the element itself, it tunes 30m without the balun and I can get 599 reports from the East Coast USA on my 10 watt K3. Good f/b also. It would seem from what you say Ron, that increasing the feeder guage may be make it even better. Another not unexpected result was experienced when using a G4LNA quad loop, a vertical square about 25 feet each side for 160M http://www.qsl.net/g4lna/pages/myant.html This is fed with 50ohm coax to a step down transformer on a ferrite ring. The secondary goes to a series variable C then on to the loop. Mounted only anout 2 feet above group, this radiates a big signal on topband for its size and was only a couple of s points down on my half wave doublet. I thought I'd be clever and ditch the transformer and slap the 450 ohm line straight on to the loop and let the balanced tuner handle it. Guess what. The SWR was perfect - but everything was being lost in the line / and or the tuner. The G5RV is another story. Everyone misuses these antennas. They should be fed balanced all the way and they become - a doublet. As most folk use them, with a balnced transformer into, hopefully, a balun, then coax into a tuner. This is a definate no no. The transformer can only be right for a given frequency and that will change with height above ground, whether the elements are horizontal or inverted V etc. Nothing wrong with a 5RV if fed directly with balanced line - but you would be better cutting it as an extended double zepp for 20 and get 3DBd gain. 73 John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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 FM TX EQ memory settings
Thank you Lyle. Will await with interest. 73 HAGW John Lyle Johnson wrote: >> Further to the FM / AM thread recently, is there a facility on the K3 >> to store EQ settings for each mode? > > Not yet. > > 73, > > Lyle KK7P > > -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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 FM TX EQ memory settings
Hi Folks, Further to the FM / AM thread recently, is there a facility on the K3 to store EQ settings for each mode? I've tried to set the EQ for FM on a frequency and store it, but when I go to another memorised frequency the EQ does not seem to change. Also it would be good to save the mic gain and compression levels between SSB AM & FM. Have I missed something? I'm using the latest Beta firmware. Thanks in anticipation. -- John Petters Amateur Raduio Station G3YPZ www.traditional-jazz.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] FM via K3
Hi Jim, Like you I find the K3 lacking on both FM and AM. The audio sounds thin. The AM is lacking, in that with full mic gain and full compression I only get about 85 percent modulation. I would like to be able to control the audio as I can on SSB, which is excellent. Any chance of having another look at these modes in the near future, Wayne, Eric and Lyle? I've reverted back to the IC706 mk 2 for AM and FM and use the K3 on receive at the moment. 73 John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ JIM DAVIS wrote: > Gentlemen, > > Is there any way to manipulate the transmitted audio when on FM using > the K3??? Nothing in the manual > suggests that it's even remotely possible, while of course when on SSB > or AM it can be accomplished > using either TX-EQ or ESSB! > > I ask this question because I work a club-rptr on 6mtrs w/FM and > eventhough I'm FQ into the machine > they mentioned to me that my FM transmitted audio sounded a tad > (SHARP) lacking the fidelity of > most mobile FM rigs available today! > > Regards, > > Jim/nn6ee > S/N#2406 (K3) > __ > 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 > -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ __ 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 on FM
Hi John, I have also experienced poor reports on FM. The audio is thin. The compressor does not work on FM at all. It is not a viable rig for FM at the moment. I will be using 10FM as well as transverting, so hopefully they will sort it out. 73 John G3YPZ www.traditional-jazz.com John Lemay wrote: > Hello all > > I joined a 2m FM net yesterday, using my K3(10w) and transverter. It's the > first time I've transmitted FM and I got poor audio reports. > > I'm using the same microphone (Kenwood MC43) and mic settings (gain 25, comp > 25, FP,L) as for ssb, where I get plenty of modulation and good reports. In > contrast, FM transmit has a very low audio level and there is a > whistle/whine in the background. FM deviation is set to 5kHz. > > FM reception is fine, using the 13kHz filter. > > Any suggestions ? Maybe there's a menu setting I've missed ? > > Thanks > > John G4ZTR > > > __ Information from ESET NOD32 Antivirus, version of virus signature > database 3837 (20090208) __ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ 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 K-3 SSB and AM Squelch
Hi Wayne I'll second that. Dave G4AON kindly sent me an old version of the firmware so that AM would work again. For the K3 to be viable as an AM TX it needs to behave the same way as a boat anchor rig. My KW Vanguard uses two 6L6s to modulate a 6146B. The modulation is excellent. My 706MK11 does a very good job on AM also. Whilst looking at this, could you look again at the FM transmit, which sounds woefully thin compared to my rice boxes set on FM narrow. The audio has no body and tends to sound snatchy on peaks. No complaints whatsoever about RX in either mode. Be nice to get the Synchronous AM after playing with Dave's Perseus over the internet. 73 John Petters Amateur Raduio Station G3YPZ www.traditional-jazz.com Randy Downs wrote: Speaking of AM, how is everyone setting the K3 up for AM now? I used to have good luck with it many Firmware updates ago. The last time I tried it, several upgrades ago, I was not pleased with it on tx. Randy K8RDD - Original Message - From: "Dave G4AON" To: Sent: Monday, January 19, 2009 3:33 PM Subject: Re: [Elecraft] Elecraft K-3 SSB and AM Squelch Can you also look at putting AM compression back at this time too? 73 Dave, G4AON K3/100 #80 I just moved it up on the list. Probably next month. 73, Wayne N6KR -- John Petters Amateur Raduio Station G3YPZ www.traditional-jazz.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] test tjp
___ 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: Using 40m Loop for 10m
Hi Phil, I have a lot of experience using 10M for VHF type contacts. You have to approach is as a VHF band. I asssume the stations are local to you and are not coming in on skip. That being the case you need to find out if the stations are vertically polarised. If so you will get good results using a vertical antenna. You could use your dipole as a vertical or an end fed half wave CB type antenna and resonate on 10M. Do not use your tuner to get rid of the mismatch - this applies to any antenna fed with coax. If you have a mismatch on the antenna you need to put the tuner between the coax and the antenna itself. If you want to use tour 40 M loop - and this will be too large to give a good space wave (ground wave) signal, you could feed it with balanced feeder into a balanced tuner ( or into your existing tuner with a balun). It will then tune on all bands from 40 M up, and may work to some degree on 80M. I used to use 10M for local contacts on FM and SSB in the 70s and 80s and the range, providing you get the antennas right is very good. Good to see 10M is being used in sunspot minima years. You never know when it will open up. Hope that helps 73 John G3YPZ David Cutter wrote: > Hi Phil > > I think the first thing that occurs to me is: are you feeding this loop with one coax and just switching between bands? > David > G3UNA > > > > I use my K3 to participate in a daily 10m CW net (28.130, 7pm PST). > I've been experimenting with two antennas for the net: 40m full wave, vertically-oriented loop, relying on my KAT3 for a match, and a home-brew 10m rotatable dipole cut pretty close to resonate at 28.130. > > When using the loop for operating on 40m, of course I get great matching without the KAT3. When using the loop for the 10m net, the KAT3 works hard, but it does provide close to a 1:1 indicated match. > > When using the loop on 40m, I can vary the output from minimum to full (approx 120w). But when I use the 40m loop on 10m, the power out shows 50w max. If I maintain the power output control to indicate 100w, I get "Hi Cur" indications during a transmission that exceeds a minute or so. (These Hi Cur indications are never instantaneous in these situations, nor are they consistent.) > > I'm sure there is some form of safety protection for the K3 transmitter, but I could not find documentation on how the transmitter might behave when it's connected to such a mismatched antenna, even with the presumed match using the KAT3. > > Can someone educate me on this? I know my 40m loop is not supposed to do well on 10m. I was frankly surprised that the KAT3 matched it as good as it did! > > Believe it or not, my ground wave signal for our local 10m CW net has been reported by the net control station as much better with the loop than it is with the 10m rotatable dipole. (Using the 10m dipole, I can see power out of 100+ watts, and don't get the Hi Cur warnings -- the signal just isn't reported by most as being strong like the loop.) > > Any insight on this would be greatly appreciated. > > 73, Phil, WA7URV K3 #1206 > > ___ 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 AM & FM Proble Firmware 2.67
Thank you Randy and Dave for the responses. I guess I can't access the old firmware. I don't remember which version my K3 cme with, but the AM was very good then. The FM has always been awful. Hope that is on the to do list as well 73s John G3YPZ ___ 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 AM & FM Proble Firmware 2.67
Merry Christmas everybody, I've just updated my firmware to 2.67. I now have no compressor available on AM and the audio sounds very thin and low - very similar to that on FM. The modulation appears to decrease the carrier power. This second problem has been an issue for some months. The FM has always sounded dreadful. Is anyone else using their K3 in anger on either of these modes? If so are you noticing the same things? Altering the TX eq does not solve the problem. By comparison my IC706mk2 in AM mode gives lots of upward modulation with compression, which is required under noisy conditions. The same radio on FM narrow gives very good audio as well. Having done a super job with SSB and CW, I'm hoping we can get a really top quality AM and FM transmit as well. Thanks in anticipation 73 ___ 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- Using two coaxial cables as a balanced feeder
Sorry to take up bandwidth here, but as there are some very knowledgable folk on list I thought I would run this query. I've been playing with a balanced feeder for my quad - DJ4VM driven element cut for 20M. I have 30M reflector. The impedance is very low on 30M and it does not like the 450 ohm line. I got over this by putting a 9:1 step down transformer, which works OK, but I suspect it may be lossy on the other bands where it is not needed. I thought it would be a good idea to make a balanced line from two pieces of RG213 to reduce the ohmic losses of the cable (the run of 450 ohm measures 6 ohms DC) and get a closer chacteristic impedance to the the quad on 30M I made two lengths of RG213 coax with the inner and outer of each cable parralled and the two cables stuck together with insulating tape as a balanced line This did not work at all well for some reason. I have also (as per the RSGB Rad Com Handbook and seen nowhere else) rearranged the cables so that the braids are connected together and grounded with the two inners providing the balanced line. On a small version of the DJ4VM quad as a test antenna, which is only a couple of ohms on 20m, the K2 sounds dead. removing the braid and using the feeder as a long wire brings the signals way up. My query is this. Is there an error in principle in using two pieces of coax as a balanced line, which would imply the handbook is wrong or am I missing something. I did wonder if the braid, used in this manner has a different velocity factor to the inner and whether this could be the problem - or am I trying to do the impossible? I have experienced a related problem in the past when I used a smalll loop antenna on 160M - about 25 ft on each leg, mounted vertically. The botton being about three feet above ground. The design was by Paul G4LNA as can be seen on the link below http://www.geocities.com/g4lna/pages/myant.html Fed with 50 ohm coax through a step down transformer with one side of the secondary going though a series capactor to one side of the loop, the other side of the transformer connected to the return of the loop. This antenna worked very well on 160 - but if fed with 450ohm line through a balanced ATU, did not radiate at all despite a low SWR. Any ideas welcome off list. 73 -- John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ ___ 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] Help Please - Possible Static Damage to K3 low power PA
Can anyone advise please? I have just been on 17M ssb running 10 watts with the K3 No high power PA installed. I heard a ticking noise coming from the ATU. Switched off and disconnected the 450 feeder to the quad and got quite a large spark to the case of the ATU. The heavens then opened, although there was no sign of any thunder or lightning. The K3 will now only put out a maximum of 5 to six watts on all bands. Before I order some new PA FETs has anyone got any other suggestions? 73 John G3YPZ ___ 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 on AM & FM on YouTube
Greetings folks, I have just posted a video of my K3 on AM and FM on 10 metres (5 watts carrier AM 12watts FM) and believe it or not on 20 metre AM with 5 watts. The video was shot on 20 July. I received very good modulation reports on AM. The K3 on receive is first class. The DSP filtering enabled me to greatly reduce the effect from QRM from an SSB station that opened up very close to the frequency I was using. I have also had some very good QSOs on 80M AM with this low power. Elecraft have come up with a very good radio for AM users. The link for video is http://www.youtube.com/watch?v=-Ts6h2sb4Tw 73 John G3YPZ ___ 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: OT [Elecraft] [K3] CW feature: Swing?
Thom LaCosta wrote: At 11:16 PM 06/30/08, Tom Childers, N5GE wrote: >CW-swing is related to music. No it isn't. It's related a person with a poor fist that cannot control the length of the dashes to match the dots they are sending. It has nothing to do with music; It has to do with reliable communication. I believe most bug users who tout the Mississippi Swing should QLF. As pro Swing drummer I would say its a pity there is not a bit more swing to many of the CW stations I copy. Many straight and bug operators were recognisable by their 'fist'. Too many today use keyers that are set too fast or have no rhythmic sense at all, running characters together, which makes it very hard to copy. Perhaps Elecraft could come up with QSD correcter. 73 John G3YPZ www.traditional-jazz.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 Transverter Control Cable
Thanks David & Roger for the advice. I should be able to sort it out now. 73 John G3YPZ David Pratt wrote: In a recent message, john petters <[EMAIL PROTECTED]> wrote ... It would appear, on re-reading the manual this morning, and what has been said below, that I need a seperate lead from the K3 ACC connector as the RS232 lead did not work. If that is the case, what do I need to do with the XV144 settings? Should the jumper settings till be set to the K2 settings? Yes, John, you do need a separate ACC lead wired as quoted by Gary as follows --- --- --- --- --- --- --- --- --- --- 8< --- --- --- --- --- --- You need to use the DE-15 AUX I/O connector to interface with the XV144. The auxbus line is needed for addressing and control of the transverter (using its ADR setting and the XV's DIP switches). And the KEYOUT-LP line is needed to place the XV into transmit mode, in the same way as the 8R line does for the K2. So you'll need to make a cable like this: XV DB9 K3 DB15 PinPin 1 ground5 6 auxbus2 8 XVTR ON 7 9 PTT 10 --- --- --- --- --- --- --- --- --- --- 8< --- --- --- --- --- --- My K3 settings for the XV144 are as follows... KXV3 nor XV1 ON yES XV1 RF 144 XV1 IF 28 XV1 PWR L1.50 XV1 OFS -0.89 (Yours may need to differ) XV1 ADR trn1 I hope that helps. 73 ___ 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 Transverter Control Cable
I've just installed the KXV3, which seems to be workingas I can receive signals through the alternate rx antenna socket. On Config I get NOR and Test. I don't get 'ON' as the manual indicates. I have the XV144 with a lead to run from the basic K2 without the transverter interface. It works perfectly well on the K3. Am I incorrect in thinking that this cable will run from the K3 when put into the RS232 connector on the K3? It would appear, on re-reading the manual this morning, and what has been said below, that I need a seperate lead from the K3 ACC connector as the RS232 lead did not work. If that is the case, what do I need to do with the XV144 settings? Should the jumper settings till be set to the K2 settings? I can't find anything on the Elecraft website about this. Any assistance much appreciated. 73 John G3YPZ Don Wilhelm wrote: Ian, Based on information I received from Wayne, I do believe that K3 ACC pin 7 is now dedicated to TX INH. There were complication in sharing it. If the change is not in the firmware version you are using, it will be with a forthcoming update. In other words, it cannot be used for XVTR ON. The +12 volt output from the back of the K3 should do nicely even though it means "Y"ing out one of the cable wires. 73, Don W3FPR Ian J Maude wrote: Bud Governale, W3LL wrote: I'd like to make up a K3 Transverter control cable. Which pins of the Elecraft Transverter J6 DB-9 connector are connected to which pins of the K3 AUX I/O? XV DB9 K3 DB15 PinPin 1 ground5 6 auxbus2 8 XVTR ON 7 9 PTT 10 I hope that makes sense :) 73 Ian ___ 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] OT:Motorola EB63 Linearity and SWR problem
Sorry to take up bandwidth here, but I'm trying to modify an old CB amp to use with the K3. It has a pair of MRF 455s. I've rewound the input transformer to 4:1 and amended the capacitors across both input and output transformers. I've put a bias supply with a standing current of 200MA. It is putting out 100 watts but is very non linear. It is also nowhere near 50 ohms impedance on the input as the SWR at best is 2:1 and on some bands awful:1. I suspect the problem lies with the transformers, the cores of which I have no information. Has anyone on list had any experience with this PA design. What should the inductance of the input and output transformers be and is the nonlinearity due perhapd the tranformers not being man enough for the job. Any answers direct to me off list would be much appreciated. May need to order some transformers from Communications Concepts. 73 John G3YPZ ___ 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 10M Birdie
Mike Harris wrote: Hi, Anyone else seeing a birdie on 28004.9+/-? Hi Mike I have it also. 73 John G3YPZ ___ 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 FM Operation
Hi Dave, My K3 puts out the full 12 watts on FM. Basic rig, no PA, nor ATU. In fact I have been woirking some EU stations on the Sporadic E opening on 10FM today. 73 John G3YPZ Dave & Jeanne Robertson wrote: Okay people I have a question. How do I get more then 2 watts out of my K3 on FM? I have the FM filter installed and turned on. I have the FM filter bandwidth set at 13 KHZ.. I can tune successfully and put out power in all modes except FM (2 watts out max. The MF mode is working I checked it with another receiver but no real power out. My K3 has an operating KPA3 and tuner. Any suggestions would be greatly appreciated. Thanks 73 Dave KD1NA ___ 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] Test e-mail
Sorry to take up space but I seem to have had my last mail bounced. John G3YPZ ___ 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 Winlog32
Hi folks, I've just tried to get the K3 to work with Winlog32, set up as a TS570 as per the K2. The programme controls the bands / modes but the transmit is permanently on. Any ides? 73 John G3YPZ ___ 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] ANYONE HAVE SECRET TO ALIGNING?CONNECTING K# FRONT PANEL TO MAAIN RF BOARD
George Sereikas wrote: I am building my K-3 and have come to the point(p 36 in instructions) where I am attempting to mount the Front Panel. Hi George, Make sure the microphone socket is correctly seated. Mine was a tight fit. 73 John Petters www.traditional-jazz.com Amateur Radio Station G3YPZ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New Firmware AM & FM Issues
Hi Folks, A couple of observations on the new Firmware. AM 1 Before the new Firmware, the AM carrier would not go above 5 watts. Now full power gives a carrier powe of 12 watts, which immediately falls to 5 watts - as it should. Once this has happened, subsequent transmissions remain at 5 watts carrier. 2 G0HNW reported that on tuning a very strong AM signal (ie Medium wave broadcast) produced a beat note - like the BFO is on in SSB mode. I can confirm I have this effect also. FM I tried this on 80M yesterday and had reports of low audio / deviation. I can't verify the deviation because I can't measure it. The audio level in the monitor is very low. This is with full mic gain and the mic set to high gain. It would be useful to be able to use the compressor in the FM mode. Hope this helps. 73 John G3YPZ ___ 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] 60 M transmit problem on K3
Ian J Maude wrote: > Hi John > > You need the software utility to open up the K3. Contact > [EMAIL PROTECTED] to get it. Thanks for all the advice K3 now running on 60M John G3YPZ ___ 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] 60 M transmit problem on K3
Hi Folks, Very pleased with my new K3. Worked 5B4 on 17M 2 way AM on 3 watts carrier. I have a problem on 60M. I cannot get the transmitter to work below our 5.398 frequency. The VFO B message says 'end'. Any ideas? Also I can't get more than 8 watts carrier output on 6M. Thanks in anticipation 73 John G3YPZ ___ 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] G5RV medium power Balun
I'm not surprised Bob. The best way is to throw the G5RV away or feed it with balanced feed - 450 ohm twin or open wire to a balanced atu. The design of the 5RV is a compromise. The twin section acts as a transformer and will only present the correct match at certain frequencies if the antenna is at a certain height above ground, in a straight line etc. Feeding a multiband antenna with coax through a balun and relying on the atu in the shack to tune it up is bad practise and will result in losses as you have found. The mismatch is occuring between the antenna and the feeder. The balun is not a matching device unless it is a 4:1 or 9:1 and then the impedances must be exactly right or a mis maith will occur. Using balnced line to a balanced atu will elimiate the need for the balun and will cut out the losses, assuming the balanced atu is efficient. If you must use coax, try running it to a point where you can switch to balanced feed and put your atu there - maybe an auto atu - but with a balanced output or a balun on the atu output terminals to the twin feeder. 73 John G3YPZ Nancy and Bob Widmaier wrote: I recently purchased a "5K watt" PVC balun from a very well known supplier of wire antenna and baluns. This supplier has a G5RV antenna that they are marketing with this balun. I believed the vendor that it would work on my G5RV; particularly because I am running medium (not high power) of 600 watts from an AL 811-H. The balun saturated in 1 hour of operation and failed. The "expert ham and marketer" at the vendor did not call me or e-mail me when I asked what the balun power specification is at the G5RV ladder line SWRs which vary from 1.9 to 8.2. I operated in the 1.9 to 6.0 range. I also emailed 2 other well know more expensive balun vendors asking them what the specifications were for their baluns at the above SWRs. Not one of them would e-mail be back in spite or their recommending that I buy their balun. It appears that none of these baluns would work and that the only solution is to use a coax choke (one balun vendor did tell me this). G5RV indicated this in his write up of the G5RV many years ago. Is this correct? What are your experiences? 73, Bob Widmaier K3JOP ___ 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] XV144 problem - no LEDs light up
Greetings Folks, I've just resurrected my XV144 after a year of none use. I needed to make up a new cable for the K2 to the XV. Everyting seems norml except that the LEDs are not lighting on transmit. As the relays operate, one bar flicks on and then goes off. I am getting about 15 watts output and it is receiving OK. I've checked the wiring on the main connector. The K2 is set to trn2 and is reading the correct frequency on 144mhz. Have I missed or forgotten something obvious? Many thansk in anticipation. 73 John G3YPZ ___ 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] G5RV
Ron D'Eau Claire wrote: Used that way, the G5RV is identical to the common multi-band doublet used since the 1920's. It's efficient if: 1) An efficient tuner is used capable of matching the rig to the antenna, and 2) No coax or other lossy feed line is used between the tuner and the radiator. Bottom line is that the practice of putting the tuner at the rig, and running coax between the tuner and the radiator with perhaps a balun or unun thrown in significantly increases the losses. Agree absolutely John G3YPZ ___ 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
