[TenTec] Omni VI Howling Noise

Bob McGraw K4TAX rmcgraw at blomand.net
Fri Oct 26 20:26:25 EDT 2018


Still something loosing contact somewhere.  A component failure wouldn't 
normally respond in that manner.

73

Bob, K4TAX


On 10/26/2018 7:19 PM, Brian Roberts wrote:
> Thanks for the reply, Bob.   Yes, I've done all the connectors with 
> De-Oxit and I thought that did the trick, but the howling noise came 
> back after about a week.
>
> Brian
>
>
>
>
>
>> 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.
>>
>> 73
>>
>> 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
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>
>>
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>
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