[time-nuts] Dead 5065A - Some comments - Some questions...

[cdelect at juno.com]

Ulf,

The A1 modules are most likely OK.

They do not need stellar performance for the 5065A to easily beat spec.

The A3 modules are another matter!

If you are indeed feeding them with 1VRMS and can't get a good output at
J8 then something is not right!

HP made several versions of the A3, the series 2644A was the last and was
completely redesigned. It is much more reliable!

I've mentioned this before, the ceramic tuning caps seize up and you MUST
break the rotors free before aligning the module!

If you don't you will most likely break the rotor connection!

If they don't turn with MODERATE pressure they need attention.

If the rotor slotted shaft turns but the rotor does not it broken!
Replacing them is a pain so again break them free first.

Using a stiff plastic shaft lever or push horizontally at two spots 90
degrees apart listening for the rotor to "snap" free.

Once you can get the proper A8 RF level the bias pot and matching network
needs to be tuned.

I usually just put the variable inductor slug 1/8" down from the top of
the form and just leave it there.

Cheers,

Corby