I have been experiencing the exact same problem for months with my Orion 565.
It started out mostly only on 20M and would clear up if either changed bands or
cycled the power. Then it progressed to other bands as well and now does not
clear up regardless of what I try. It affected only the main rcvr, the sub was
fine. Listen on a separate radio to see if it also affects the transmitted
signal. In my case the transmitted CW signal sounds just like the received
signal audio, warbly and buzzing almost like a spark gap signal!. So I'm
guessing it's somewhere in the local oscillator/IF chain. I've talked to TT a
few times and there's no way to diagnose my symptoms without getting it on the
bench.
Currently it's sitting on the shelf unusable while I decide how much I want to
spend on it. Good luck. If you think of it, drop me a note if you resolve the
problem.
Art/N4UC
> From: Doug.Speer@FairbanksMorse.com
> To: tentec@contesting.com
> Date: Thu, 16 Oct 2014 13:37:22 +0000
> Subject: [TenTec] Orion II Problem
>
> I am starting to believe my Orion II has developed a problem. On the main
> receiver I am hearing distorted, buzzing sounding signals that are well
> outside the DSP and roofing filter bandwidth. I am not hearing signals
> outside the filter bandwidth on the RX-366 sub-receiver. The problem is most
> notable on 160m but to some extent present on 80m. I don't really notice it
> above 80m. I have tried a master reset which did not resolve the problem.
>
> Do any of you have any immediate thoughts or does the rig need to visit
> Sevierville?
>
> Doug, W9PN
> Janesville, WI
>
>
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