[time-nuts] Z3801A going into Holdover

[Dan Rae]

I have an elderly 3801A with some 182,000 hours on the clock, which if 
my arithmetic is correct means over twenty years of operation.  Since it 
has a well aged and remarkably stable OCXO I would like to keep it going 
if possible.  Recently it has been going into Holdover and staying there 
for no reason that I can see, it is fed from the same antenna / splitter 
amp combination with a good sky view as eight other GPSDOs here.  LH 
reports as good a signal strength on it as any of the others.  A Cold 
Reset gets it going again.

Does anyone know if a more modern receiver can be fitted in place of the 
existing VP6?  Is it likely to be a Rx problem anyway?

I'm running LH at the moment and will try to capture a screen when it 
next goes into Holdover to see if that gives me any clues.

Thanks for any advice!

Dan