[TenTec] Omni VI Howling Noise

Bob McGraw K4TAX rmcgraw at blomand.net
Fri Oct 26 20:09:22 EDT 2018

Have you done a recent "connector cleaning"?.     If not, I'd say it is 
time to do so.    Just sitting there, internally the connector contacts 
will oxidize after 30 or so years.

So, one at a time, unplug each connector, then using a Q-Tip moistened 
with contact cleaner, scrub the male pins.  Then plug the connector in 
and out a couple of times to wipe the female pins.    Be sure you have 
aligned the connector correctly and that it is fully inserted.  Move on 
to the next connector.   Usually this method will correct a very large 
part of intermittent and strange issues.

NEVER spray anything into the radio, connectors, IC sockets and such.


Bob, K4TAX

On 10/26/2018 6:48 PM, Brian Roberts wrote:
> Hello Gents--
> I have a Ten Tec Omni VI that has an intermittent problem that comes and
> goes for no apparent reason. The radio can be transmitting or receiving just
> fine and then a loud howling noise comes on. When the noise comes on, all
> functions are lost (signal reception, mode selection, band change, audio
> gain, etc.). The radio can be turned off and then back on with no change.
> Resetting the processor doesn't help. Shutting the radio down for a day or
> so will bring it back to normal again. Normal operations may continue for
> days or weeks before the howling noise appears unexpectedly once again.
> I've found that pulling cable #56 on the Logic Board will stop the howling
> noise. Plugging cable #56 back in restores the howling noise.
> Has anyone had a similar problem with the Omni VI or can anyone give me any
> guidance on how to go about repairing the radio? Thanks.
> Brian K9VKY
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