This circuit is from a 60's documentation. The capacitance C1 can be between 20 pF and 0.01 uF depending on the generated frequency. Equivalent transistors may be employed.
The bipolar transistors may be BD136 and BD136 and FET of any type for 1 A current at least. The...
This circuit of the 80's makes use of components of the time. The circuit is from an American...
This circuit was found in an 80's Electronic Design. The frequency depends on the crystal and the...