[time-nuts] Re: 5061A HV Supply, et al.

[paul swed]

Jim
It will be fun to try to save the unit. But indeed the tube may be depleted.
I am pretty sure the 3500 V doesn't come on if the ion pump current is to
high. They are interlocked. If the tubes been off then the ion pump current
should peg and that is a key.
It has to be below about 20 on the ion pump meter.
There is a good bit of detail from KE5FX as I recall on using an external
supply to pump the tube down. Though the voltages are dangerous as a
caution.
You have nothing to lose so have fun trying to recover the unit. No matter
what you will learn good stuff.
Regards
Paul

On Wed, Nov 9, 2022 at 11:48 AM Jim Muehlberg via time-nuts <
time-nuts at lists.febo.com> wrote:

> I've recently come into possession of a 5061A.  It is claimed that the
> tube is exhausted, but I'm unwilling to scrap it (horrors!) yet.  I'm
> not well equipped for HV measurements, but it appears the +3500 V supply
> is not working.  So, I'm hoping the tube just needs to be pumped since
> it hasn't been powered for years.  Also missing the A3 assembly, but
> I'll worry about that later...
>
> Anyone willing to part with their A18 or loan it to me?
>
> Thanks!
>
> --
>
> Jim Muehlberg
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