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 seemingly,
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 B
is selected. The sub Rx works normally.
I have tried power cycling, master reset, and battery reset. None of these
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 this
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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