The frequency of this Pierce oscillator, found in 1969 documentation, depends on the crystal. The current in the drain is about 500 uA. Crystals from other frequencies can be used.
Employing transistors of the time, this circuit was found in a documentation from 1963. The coils...
This circuit with the CK722 was found in a Raytheon publication from the 60's. The relay is of the...
This circuit is from a 1975 amateur radio manual. The components can be approximated to the...