Am 31.01.2013 05:28, schrieb Chris Albertson:
For once the "best" is also cheap: Batteries.
But not all batteries are the same. You want one with low internal
resistance, so a lead acid flooded battery will be the best.
Fred Walls & Co have done tests on batteries. The article is
somewhere on the NIST time/freq server.
regards, Gerhard
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