[time-nuts] Vintage Frequency Measurement

[Scott Stobbe]

On Sun, Feb 12, 2017 at 8:39 AM, Dan Rae <danrae at verizon.net> wrote:

> 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 :^)


 To they very long list of individuals who pointed out the BC-221, many
thanks. What a endless treasure trove of great material.

Double thanks, to those who have made commitments to document and share the
history online, such as Alan M, Tom B, Brooke C, and others