This untuned (aperiodic) amplifier circuit was found in the August 1974 Radio Electronics magazine. The transistors are period, and the board layout is critical.
Suggested by Motorola documentation from the 1980s, this circuit can be implemented with...
This configuration makes use of an LM3900 transconductance operational amplifier. The transistor can...
This is a typical 80's FM radio mixer circuit. The circuit was found in a documentation of the...