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.
This simple source of up to 1 A can supply voltages according to the secondary of the transformer, in this...
This circuit with germanium transistors is from 1960 and was found in Mullard's transistor...
This non-inverting AC amplifier was found on a Popular Electronics. The setting applies to any...