This circuit was obtained in a 1975 documentation. The maximum frequency depends on the diodes and the FET. Type 1N34 diodes and a FET BF245 can be used for frequencies up to 100 MHz.
This circuit is placed between the instrument pickup and the amplifier input. The same version can...
The transistors on this 1975 circuit can be BC548 and BC558. The circuit uses a symmetrical source...
The capacitors of this 80's circuit must be ceramic and the transistor can be any PNP that...