[time-nuts] Vintage Frequency Measurement

Dan Rae danrae at verizon.net
Sun Feb 12 08:39:01 EST 2017

On 2/11/2017 10:08 PM, Scott Stobbe wrote:
> I was inspired recently coming across a Lampkin 105 frequency meter, as to
> how  frequency measurement was done before counters.
> Certainly zero-beating a dial calibrated oscillator, would be one approach.
Google BC-221 and you may get some idea of how those worked.  I just 
wish I could find the one hidden in my garage :^)


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