This reinforcing stages from a 1960s documentation. No information is given about the transformer and the transistor admits equivalents.
May 2017 - This new Ricoh 4 A current device is now available from Mouser Electronics. The device...
This preamplifier is indicated for low and high-impedance sources as microphones, transducers,...
This circuit was found in an American 1980s documentation. It is a circuit that can be used to...