This circuit from the 60's uses germanium transistors of the time. Listening is done on high impedance headphones.
This circuit, with the TBA810 circuit, which is no longer common today, was found in a 1985...
For a 75ohm output, this circuit was found in ancient American documentation, using components from...
Taken from a 1954 book by Rufus Turner, this amplifying step with PT2A transistors provides an...