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

[Predrag Dukic]

Viton is good enough to keep moisture out and  air pressure constant.

It is however permeable for light hydrocarbons and fluorocarbons.

And for hydrogen, (as most metals are also).

It is a matter of definition...

Predrag Dukic



At 16:14 20.7.2008, you wrote:
>Ed Palmer wrote:
> >> If their intent was to hermetically seal the oscillator, why would they
> > leave the screw in the front that covers the adjustment hole (which
> > nobody could possibly get to!)?  Would the seal around the screw be good
> > enough to make it worth the effort to seal the rest of the unit?
> >
> > Ed
>
>Good point.  I don't know about the hermeticity of a screw, sounds
>questionable.  It's possible the designers were kidding themselves.
>I know that I debunked a lot of their theories about what is or is
>not hermetic.  For example, "hermetic" epoxy isn't.  Possibly there
>is a Viton O ring around the screw.  I think that might be hermetic.
>
>Rick Karlquist N6RK
>
>
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