[time-nuts] Rb Tube Life Estimate
kirbybq at bellsouth.net
Thu May 22 20:27:27 EDT 2008
The monitor test points will not help you, except to let you know its
I had an FRK-L that the lamp failed. I ran fine for 12 years (and it
had more years on it, bought surplus). It was working fine and one day,
I noticed it was not locked. I kept monthly logs and the data did no
show any real changes. When I opened the unit I could see the lamp was
firing and running - but the optical pumping/adsorptions transition
occurs in less than a single percentage point. Most lamp failures occur
because the glass gets a internal burned coating.
Surplus lamps are not too expensive (usually under $50 or so)...and a
new one - back when Efratom was in business, they wanted $400. I
believe Symmetricom wants about 3 times that amount....
I can recommend Corby Dawson, who is on this list, should you need repairs.
Brian Kirby KD4FM
Richard W. Solomon wrote:
> I picked up an EFRATOM FRK over on the "dark side" and was wondering if there
> is any way to determine or estimate the life remaining on it.
> Thanks, Dick, W1KSZ
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