Curt, maybe the faulty filter was allowing various mixing products to pass
through to the
output on transmit. If so, the antenna tuner would not likely be able to find
a match for the
desired frequency and the unwanted products at the same time.....maybe. :-)
Please tell us what TT says about the matter. Curious minds want to know.
Glad it's working well!
On 25 Jan 2011 at 8:12, Curt wrote:
> My Omni VII arrived in good condition after a trip to the factory to
> repair a broken internal ATU. It seems to be working fine, the tuner
> works as well as it did when new.
> What puzzles me is Ten-Tec's note about the repair says "replaced
> defective 455 filter in transmitter chain. Labor $150, mat'l $3" I
> haven't a clue about what the 455 filter is or how it could cause the
> ATU to fail. The transmitter functioned well with the broken tuner
> bypassed and using my external tuner. What's also bothersome is the
> list of functions checked by the technician don't include anything
> associated with the ATU.
> I've sent a note to Ten-Tec service asking for an explanation, while
> waiting for a response, does anyone on this list have any thoughts
> about how the noted defect would prevent the internal ATU to work, but
> permit the radio to function normally when not using the internal ATU?
> 73, Curt KB5JO
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