This circuit was found in an American publication from 1965. The circuit uses components from that time. No information was given about the excitation transformer. Observe the high input power.
This stereo preamp uses only two germanium transistors. The circuit was found in old documentation using...
We found this preamp circuit with tone control for bass and guitar in a 1987 documentation....
We found this receiver in old documentation. The transistor is made of germanium and the...