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. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
