Make sure the ground screw on the rear is very tight. The DC negative from
the 4 pin power connector on the rear gets its connection to chassis and
system ground under this screw on the inside.
I doubt that any shielding of the logic board will be of any value. Likely
something is loose on the inside, cable not secerely plugged in or one just
might need to clean and excercise connectors. Or the DC power switching
relay on the power distribution board might be defective causing excessive
voltage drop under load.
If it happens on a dummy load, I doubt that any grounding would improve
things.
73
Bob, K4TAX
----- Original Message -----
From: "Scott Shepard" <scottsheppard@videotron.ca>
To: <tentec@contesting.com>
Sent: Monday, February 24, 2014 6:41 PM
Subject: Re: [TenTec] Does this happen to you on transmit...OMNI V ??
I have a run of LMR 400 out to the hex beam over 140 feet away. PWRs supply
is 32 amp switching but it does same on TT supply as well...cw key down or
ssb voice peaks...same effect. I will play around with some grounding ideas
and see what happens. May have to build a shield for the logic board...if
memory serves me it had similar issues into a dummy load but will verify...
Thanks
Scott
Sent from my iPad
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