Jerry it sounds like a possible power supply problems. Have you tried a different supply?
Sent from my iPhone On Aug 16, 2010, at 11:28, "Jerry Pittenger" <[email protected]> wrote: > Well it looks like I have a problem. There is an intermittent buzz on the > speaker audio. When I turn on the radio it works perfectly. But after a > few minutes a strong buzz overlays the audio. It is sever. You can hear > the stations under the buzz. If I turn the radio off and immediately back > on, the buzz is still there. However if I leave the radio off for 3 or 4 > minutes and turn it on, it is fine for a few minutes and then the buzz pops > back on. Also keying the radio on CW also seems to fire up the receiver > buzz. Note that it is okay on a pair of headphones. It is like it is > going into oscillation. Everything else on the radio seems normal. > > > > Any suggestions? I suspect a component in the audio amplifier. Does the > headphone jack take the audio signal before it hits the main audio amp? > I wish I had a set of circuit diagrams. > > > > Jerry K8RA > > > > > > > > > > > > ======= > Email scanned by PC Tools - No viruses or spyware found. > (Email Guard: 7.0.0.18, Virus/Spyware Database: 6.15660) > http://www.pctools.com/ > ======= > ______________________________________________________________ > 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
