The transistor can be a BC548 and the coil has the following characteristics for 1 MHz. L1 has 80 turns of wire 28 in a ferrite rod and L2 of 30 and 40 turns.
This circuit was found in an American documentation from the 60's. The transistors are from the...
The dual operational used in this sound effect that separates the signal into two tracks is not...
The circuit shown was found in a 1967 RCA manual. Modern equivalent components can be used. The...