[time-nuts] VHF-UHF Frequency Calibrator

[Gary Woods]

On Fri, 4 Jan 2019 14:49:39 -0800, you wrote:

>The 12AT7 dual triode tube used as the oscillator has the crystal connected between the two cathodes, a configuration I 
>haven't seen before.

Sounds like a Butler oscillator; very popular with Navy avionics back
in the day of those glass NPN devices with the light inside.


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