Oscillator HA7210 (CB22402E)

This circuit is from an old documentation and can be used to generate signals in different frequency bands.

Five Transistor Superherodyne Receiver (CB960E)
This is a commercial circuit from the year 1958. Transistors are germanium types and transformers...
Balanced Mixer as Product Detector (CB4235E)
Found in a 1980s telecommunications documentation, the circuit presented acts as a product...
Tip Gun (CB18774E)
This spot gun or spotlight for cars with a distributor (old models) was found in a publication from the...