Jerry,
Thanks again for the advise. You called it. Radio back on frequency
(compared to another radio), and hum gone. When I did the resistor change
for a heil mic, I must not have tightened the mounting screws enough and
when working with the interface connector, it developed a ground problem.
73's
David
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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