4-tube reflex (T1662E)

This circuit that uses a loop antenna was found in a 1924 publication. The circuit has several supply voltages and sets of audio and RF coils.

| Clique na imagem para ampliar |

Triangular generator (CB22370E)
The oscillator circuit is an ICM7556, the dual CMOS version of the 555. The frequency depends on...
Flip Flop with the Operational LM3900 (CB4510E)
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
24 V and 100 V power supply (CB8672E)
This circuit was found in an American documentation from 1968. The circuit uses transistors from that...