I had a Triton that would oscillate when the drive control was advanced past
the point that the output power was over about 80 watts. Called Garland
Jenkins. He suggested I look at the diodes which generate the ALC voltage
because they were probably bad (they were). He further suggested that while
in there I replace the diodes which generate the SWR voltage because diodes
are cheap but getting to them is right much of a bother. Voltage spikes on
the antenna input can cause those diodes to fail.
73, Mike N4NT
----- Original Message -----
From: "W1EOF" <w1eof@hamnutz.com>
To: <tentec@contesting.com>
Sent: Sunday, January 25, 2004 7:01 PM
Subject: [TenTec] Omni-D ALC
> Hi All -
>
> Just joined this list last week. Glad to see so much activity on it.
>
> I have had an OMNI-D for about 10 years now. I've really enjoyed using it.
> There is one thing about it's operation that has bothered me though:
>
> When you are adjusting the drive control so that the ALC kicks in/out the
> OMNI will oscillate, making a "groan" kind of sound in the sidetone. From
a
> design point of view I've always wondered if it was lacking hysteresis in
> the ALC. It does this one some bands more than others.
>
> Is this normal operation? If not, has anybody else had a similiar problem?
>
> I've just worked around it all these years. However I'm about to open it
up
> to install the WARC kit and thought that it would be a good time to look
> into that ALC circuit too.
>
> 73,
>
> Mark W1EOF
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