[time-nuts] Powering up a long inactive 5061A

Scott McGrath scmcgrath at gmail.com
Thu Jun 15 15:20:10 EDT 2017

First you will need to power it up in Cs Off state and monitor the ion pump current by periodically switching to Cs On

If you have a possibly good tube ion pump current should drop to zero in a few days to 3 weeks

Thats your first step

> On Jun 15, 2017, at 2:02 AM, Hugh Blemings <hugh at blemings.org> wrote:
> Hi,
> I've been assisting with the cataloguing and, where possible, testing of a bunch of test equipment from a deceased estate.
> One of the items is a 5061A which best I can tell has not been powered on for over a decade.  The High Performance tube has a warranty expiration date of 1988.  Serial number is 1936A01567 and has Option 01 and 04 and has the digital rather than analogue clock.  Minor but it's missing the bottom cover.
> My intuition is to set it to one side until I can become familiar with the operating manual and potentially bring power up to it slowly with a Variac or similar.
> I'd be curious as to the time-nuts view on whether this degree of caution warranted ?
> I suspect the Cs tube is long dead, but maybe I'll be pleasantly surprised ?
> Would welcome feedback on sensible/cautious first steps with the unit - initial need, if possible, is a "simple" go/no go/does it power on ?
> Cheers/73
> Hugh
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