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

[Chris Hastreiter]

Jim,

When I was working on mine I created a simple voltage divider using a 1GOhm
resistor from Digikey as the high arm (make sure to account for meter input
impedance in the divider design).  You'll likely need to check the voltage
with the tube both connected and disconnected as it can load down the
supply if there are any whiskers growing on the ion pump.

I don't have a spare A18 to share, but there is some good material in the
list archives from people that have repaired these power supplies.

Thanks,

Chris



On Wed, Nov 9, 2022 at 10:50 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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