This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used as a basis for modern designs with equivalent transistors.
The transistor of this oscillator can be 2N2222. L1 is formed by 9 turns of wire 26 with a socket...
This 1956 direct amplification radio circuit was found in a documentation from Sylvania that...
This circuit consists of a rearrangement of the previous circuit also using 4 relays. We found this...