[IRCA] lead acid cells

[Charles & Leonor Taylor <calltaylor@xxxxxxx>]

Crew,

I have a 12-V secondary frequency standard that draws 250 mA. It has a 
proportional temperature heater on the crystal and was a surplus out of 
some quality synthesizer. Excellent stability.

I want to power it from an auto battery, as NiCads or such are just too 
expensive for me now. So I know someone out there can give me good advice 
as to what type gives good value/price.

Another thing, would it be wise to let the battery run way down periodically?

I suppose GPS is simpler, but that's not fun. I like to be able to say I 
can maintain dead-on accuracy simply by knowing the aging rate of the crystal.

73,

WD4INP

Charles & Leonor Taylor
       Grifton, N.C. 


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