Bad power supplies, check for hum from them. Ground radio and/or power supplies. The A/C hum has to come from the wall supply. That's my two cents, good luck. N6XVT 73
Sent from my iPhone On May 16, 2010, at 8:43 AM, Sam Morgan <[email protected]> wrote: > This one is a bit hard to describe, so please bare with me. > > I was talking to some locals (1-5 miles) this morning on 80m LSB. > I was told that when I was tuning up a hum was heard on my signal > by the guys, which were in LSB on their receivers > > I tried with low power 1w > I tried with higher power 90w > I tried it through the external amp > I tried it with the external amp off > I tried it direct to the antenna > I unplugged everything from the K3 but the power and antenna > I have switched power supplies, > I have switched AC outlets in the room. > > They say they still hear the hum. > > I switched to cw and > when they were still listening in LSB, > they still heard the hum on my cw signal. > > IF they switch to cw on their rigs, > they do NOT hear any hum on my cw signals. > > what in the world is going on here? > do I have a problem or not? > -- > 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:[email protected] > > 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
