Tunnel diode astable (CB9250E)

This circuit was found in a 1967 General Electric documentation. The components are from that time. The tunnel diode is difficult to obtain today.

| Clique na imagem para ampliar |

Analog Divider Multiplier (CB21035E)
This circuit was found in an Analog Devices publication from the 1990s. The circuit performs input...
Transistor long-term timer (CB9370E)
Found in Motorola documentation from the 90s, this circuit can be implemented with current...
Automatic Frequency Control (CB4101E)
We found this circuit in an old documentation for hams. In it we have the way to use a varicap to...