lousy cw signal
Locked
 
|
Yesterday I was chasing a 3B8 on 20 cw. Because my antenna (fan dipole) got twisted in the last storm, my swr is over 3:1 and I can't use my amp. The ant tuner in the K3S easily matches it tho. I received an email from a W4 telling me that I had spurious emissions 10 kc either side of my signal. He said in the email, "Jerry, I have been monitoring the activity on 14.041. I think there is a problem with your transmitter. When you transmit your signal spreads out over 10 kHz each side of your operating frequency. I've never seen anything quite like this before on my Panadapter, but when you transmit your signal spreads out over 20 kHz wide with the strongest spike on your operating frequency with spikes going "down hill" on both sides for at least 10 kHz before sinking below the noise level. Not something that you want to hear, but I thought you would like to know. "
I don't have a separate receiver to check this out but before I go asking a local ham to monitor my signal has anyone ever heard of this before? Suggestions where to start? Thanks! ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
|
|
Hi Jerry,
That is the kind of broadening that can occur if your transmitted signal is arcing continuously somewhere on the transmission line or antenna when your key is down. Fix the antenna and that most likely will go away. "Matching" an arc with a tuner is illusory, and tends to transfer maximum power into the arcing site. It can create amazingly broad signals. Back in old analog TV days, that could have blacked out TV's in your neighborhood. In any event, don't use that antenna until you have corrected the problem and your amp no longer faults on it. Good luck and 73, Guy K2AV On Thu, Feb 2, 2017 at 10:36 AM, Jerry <[hidden email]> wrote: > Yesterday I was chasing a 3B8 on 20 cw. Because my antenna (fan dipole) > got twisted in the last storm, my swr is over 3:1 and I can't use my amp. > The ant tuner in the K3S easily matches it tho. I received an email from a > W4 telling me that I had spurious emissions 10 kc either side of my signal. > He said in the email, "Jerry, I have been monitoring the activity on > 14.041. I think there is a problem with your transmitter. When you > transmit your signal spreads out over 10 kHz each side of your operating > frequency. I've never seen anything quite like this before on my > Panadapter, but when you transmit your signal spreads out over 20 kHz wide > with the strongest spike on your operating frequency with spikes going > "down hill" on both sides for at least 10 kHz before sinking below the > noise level. Not something that you want to hear, but I thought you would > like to know. " > I don't have a separate receiver to check this out but before I go asking > a local ham to monitor my signal has anyone ever heard of this before? > Suggestions where to start? > Thanks! > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
|
|
In reply to this post by k1tgx
My question is how are you sending CW ? using a key direct or computer? If
Computer then how is it connected/sending.. -----Original Message----- From: Elecraft [mailto:[hidden email]] On Behalf Of Jerry Sent: Thursday, February 02, 2017 10:36 AM To: [hidden email] Subject: [Elecraft] lousy cw signal Yesterday I was chasing a 3B8 on 20 cw. Because my antenna (fan dipole) got twisted in the last storm, my swr is over 3:1 and I can't use my amp. The ant tuner in the K3S easily matches it tho. I received an email from a W4 telling me that I had spurious emissions 10 kc either side of my signal. He said in the email, "Jerry, I have been monitoring the activity on 14.041. I think there is a problem with your transmitter. When you transmit your signal spreads out over 10 kHz each side of your operating frequency. I've never seen anything quite like this before on my Panadapter, but when you transmit your signal spreads out over 20 kHz wide with the strongest spike on your operating frequency with spikes going "down hill" on both sides for at least 10 kHz before sinking below the noise level. Not something that you want to hear, but I thought you would like to know. " I don't have a separate receiver to check this out but before I go asking a local ham to monitor my signal has anyone ever heard of this before? Suggestions where to start? Thanks! ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |