Strobe (T461E)

Found in Popular Electronics from August 1968, this circuit makes use of a strobe tube from the time.

Astable Timer 555 (CB9369E)
This circuit was obtained in a Hands-On Electronics from the 90's. The circuit turns on one LED at...
Tunnel Diode Listening Transmitter II (CB19426E)
This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is...
VHF Modulator (CB13496E)
This oscillator is used to modulate video game signals or even small cameras so that they can be...