Broadband amplifier (CB9005E)

For a 75ohm output, this circuit was found in ancient American documentation, using components from the time.

Photodiode Amplifier (CB13300E)
This circuit is from a technical documentation from Motorola from the 70s, and for this reason it is...
Constant Volume Amplifier 741 (CB13686E)
We found this circuit in a 1976 documentation. The FET can be BF245 or MPF102 and the power supply...
Model contol (CB22185E)
This miniature railway control circuit was found in an English documentation from the 1980s. The...