Found in a Popular Electronics from the 90s, this amplifier uses an integrated circuit from the time. The circuit operates from the LF band up to 600 MHz with a gain of 16 dB.
We have dozens of similar projects in articles and circuits on this site. This is from Radio...
This circuit with an unusual configuration was found in the January 1974 issue of Radio...
This interesting circuit from 1967 documentation uses three series lamps to regulate the voltage...