This circuit was found in an 80's Electronic Design. It amplifies TTL fast signals for a coaxial cable. TTL is from the S (Schottky) line and transistors are types of the time.
Found in a 73 magazine for radio amateurs of the 1980s, this circuit uses a dual-gate MOSFET. This...
This shunt voltage regulator was found in an Electronic Design from the 90's. The power transistor must...
This commercial amplifier uses germanium transistors from the era. It was found in a Japanese...