What I did to my Omni 6 is pull the speaker and install a small muffin fan
in its place, as well as a second fan on the rf brick heat sink. A 50 ohm
resistor in each fans B+ lead keeps the fan noise tolerable.
You may want to try this....
----- Original Message -----
From: "Chuck Guenther" <ni0c@earthlink.net>
To: <tentec@contesting.com>
Sent: Wednesday, July 13, 2005 6:44 AM
Subject: [TenTec] Omni six-- heat related IF gain problem
For several weeks now, I've noticed a pronounced reduction in gain of my
Omni 6 after it has been on for a while. When I first turn on the rig, I
get an s meter reading of s-2 to s-3 on antenna noise, which degrades to
s-0 after the rig has been on for a while. The attenuation used to take a
few hours to kick in, but this morning I noticed fading out in a matter of
minutes. Has anyone else experienced this? I suspect a problem either on
the 9MHz board or the PBT board. Any hints would be appreciated.
Thanks & 73,
Chuck NI0C
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