Sawtooth generator (CB21338E)

This op amp circuit is based on a 555 IC and two common op amps. Transistors are general purpose.

2 Transistor Spy Transmitter (CB19429E)
This transmitter operates with a voltage of only 1.4 V, and can then be powered by a single...
Two controls relaxation (CB9247E)
Found in an Electronic Design of 1964 this circuit has a control for the frequency and another for the...
VHF TV tuner (CB20251E)
This old circuit, from the 80s, was found in American documentation. The circuit uses dual gate...