Two Transistor Super heterodyne (CB20574E)

This circuit was found in an English publication from 1967. The circuit is for listening on a phone. Transistors are types of germanium of the time.

| Clique na imagem para ampliar |

Spy Transmitter (CB19424E)
This small crystal microphone transmitter was indicated in an 80s spy book. The range depends on...
LDO from 1.2 V to 32 V x 1 A (CB1251E)
The circuit we use makes use of Linear Technology's LT3080 (www.linear.com) which consists of a...
TAA811 1.5 to 3.3 W amplifier (CB10899E)
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...