This circuit is placed between the instrument pickup and the amplifier input. The same version can be found from other sources in this section. This is from an English magazine from the 80s.
This circuit was found in an Experimenters Handbook of the 1990s. The purpose of this circuit is to...
Signals from old cordless phones can be picked up with this circuit. L1 has 10 to 20 turns of 32...
This emitter-coupled transistor LC oscillator circuit was found in the May 1970 issue of Radio...