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 for loads up to 10 A was found in a 2005 Linear Technology documentation. The MOSFET...
In this circuit of a 1956 publication, the handset must be high-impedance magnetic and L1 has 200...
This circuit can be used to obtain a zener voltage from a common zener of another value, adjusting...