Tunnel diode simple noise generator (CB23705E)

This circuit was found in Radio Electronics magazine from November 1960. The circuit is powered by a photocell of the time.

0 to 21 V x 2 A Transistor Power Supply (CB4998E)
This circuit is from an English publication from 1973, but can be easily assembled today. 2N718 can...
Superheterodyne FM Receiver (CB4334E)
The integrated circuits used in this 1989 project are uncommon today, including the IF coil that...
144 MHz Super Regenerative Receiver (CB19600E)
We found this receiver for the 144 MHz band in a European publication from the 1970s. The circuit...