I believe you have self-diagnosed the problem. I had to have TT realign the
synthesizer on one of my Orions. It exhibited very similar behavior.
You may want to call TT and talk with Tony, but I think you've already found
----- Original Message -----
From: "Martin Ewing" <email@example.com>
To: "tentec-list" <firstname.lastname@example.org>
Sent: Saturday, September 19, 2009 10:41 PM
Subject: [TenTec] Orion drops lock?
> My 565AT is developing an unpleasant operating mode, where the main Rx
> output stops. This is on 40 CW, for example, but probably on other
> modes/bands also. If I fiddle with the VFO, I can bring it alive
> for a time. I hear CW signals, but changing the VFO setting does NOT tune
> the Rx. I have no idea what freq. is actually being received! In this
> mode, there is no Tx output, either. It doesn't matter whether VFO A or
> is selected. The sub Rx works normally.
> I have tried power cycling, master reset, and battery reset. None of
> cures the problem. If I power off for an hour or so, the radio comes up
> normally. The radio is happy to run for many hours until it flips into
> non-operating mode -- it does not appear to be triggered by operating
> temperature alone, but some random operating event or condition that I
> haven't been able to narrow down.
> Without digging into the radio, I have the sense that there's probably a
> phase lock loop that has drifted close to the edge of its operating range.
> It ought to be a simple thing to adjust (he says).
> Has anyone else seen this problem? Is there a field adjustment procedure?
> Or is it time to ship it back to TT?
> Thanks for your advice!
> 73 Martin AA6E
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