Jerry,
Thanks very very much. That does make very good sense. It seems more than
just coincidence that the problem occurred at the same time. I had
forgotten that I did have the TX /Audio board out a couple months ago to
change two resistors for my heil mic. As I recall, (don't have the manual
in front of me), the db25 is connected to this board? I'll look into it
tonight when I get home.
73's
David Drake
Wd9cmd
----- Original Message -----
From: "Dr. Gerald N. Johnson" <geraldj@weather.net>
To: <tentec@contesting.com>
Sent: Wednesday, July 15, 2009 10:05 AM
Subject: Re: [TenTec] Omni VI problems
> On Wed, 2009-07-15 at 09:00 -0400, David & Chris Drake wrote:
>> Thanks Ron,
>> Yes, unhooking the serial cable made no difference. When I found out
>> there
>> was a hum in my audio, I methodically began unhooking things in the shack
>> one by one. First was the serial cable. I even went to the breaker
>> panel
>> and shut down the rest of the house !!. Finally unhooked the 961 and
>> substituted the astron RS 35. Same thing. So it seems to be the radio.
>> David
>>
> Lift the lid. Tighten all the board mounting screws. Check the
> microphone cable. See if it happens with the microphone disconnected.
> Just yesterday someone noted they found their hum came from a broken
> braid on the microphone cable. It might be that the act of connecting
> the RS-232 cable moved a loose board and broke a ground connection. Look
> for that.
>
> 73, Jerry, K0CQ
>
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>
>
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