Fred -
It's not really clear to me if you are referring to transmit audio or
receive audio. If it's transmit audio, I suspect you are getting RF
into the transmitter AF stages. Did this just start recently, or did
you just use 40M for the first time? Check the microphone cable shield
and all coax cable shields / connectors. Assuming a well matched
antenna on 40M !
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
[email protected] wrote:
I had the supply rebuilt 2 years ago and noticed that if I lay my
finger tips on the top of the speaker cabinet I can feel a vibration
as soon as I turn on the transmitter switch. On 40 meters I can hear
some audio distortion or a frog in the throat sound to the audio.
Anyone else have that issue on 40 meters? Caps were replaced according
to the guy that rebuilt the supply and did the other tune ups on the
rigs (T4XB & R4B). If I take it back to him again it will probably
cost me another small fortune to have him check it out or repair it.
Any ideas?
Power supply was working fine when I took it to him but I allowed him
to talk me into a rebuild because it was old and it sounded like the
right thing to do at the time .I am not sure now if he installed the
new circuit board at that time or if that board was even available then.
Thanks 73
Fred WD8ADG
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