[time-nuts] Double ovened 10811-60158 on ebay

Thomas A. Frank ka2cdk at cox.net
Sun Jul 20 11:02:50 EDT 2008


> The way to make a HP10811 immune to humidity is to seal it in a metal
> container with glass leadthrough seals
> after it has been flushed with dry nitrogen for a few days.

Or perhaps pump it down to a vacuum, hold for a couple of hours, then  
fill with dry nitrogen?

Just don't power it during that time.

> Another method is to seal a small quantity of P2O5 in it as a
> humidity "getter". An added improvement is to wind
> two platinum wires on a P2O5 containing fibre glass pad, and
> electrolyse any water absorbed to oxygen and hydrogen gas
> after it is sealed.

Doesn't that pose a minor fire/explosion risk?  As the H2 and O2 try  
to recombine?

Tom Frank, KA2CDK






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