[time-nuts] Thoughts on Cs tube failure modes (aceamusements at mchsi.com)

[aceamusements at mchsi.com]

Corby,
never heard of that before.

might be due to long storage before I opened the box for the first time?

even stranger is the fact the pump current started out real low at first power
on .2 or .4 and has steadily risen over time (11 months)

unit has been online pretty much 24/7 and I was just curious if anyone has seen
a rise in pump current(in continuous operation) as described although I got a
ways to go before shutdown.

30ua I think?


----------------------  Original Message:  ---------------------
From:    Corby Dawson <cdelect at juno.com>
To:      time-nuts at febo.com
Subject: Re: [time-nuts] Thoughts on Cs tube failure modes (aceamusements at mchsi.com)
Date:    Tue, 2 Dec 2008 20:13:22 +0000

> What you describe could be "whiskers"  growing in the ion pump. 
> 
> They do not affect the pumping until they grow big enough to load the
> supply past its current capability.
> 
> You can sometimes remove them using a hand held brush discharge tester.
> (Remove tube from chassis before doing this!)
> 
> I would not try this until the current rises enough to cut off the ovens.
> 
> Your current is still quite low.
> 
> Corby Dawson
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