High-speed buffer (CB9556E)

Found in a 1980s documentation, this circuit makes use of components from that time. Modern equivalents can be tried out.

Non-linear amplifier (CB24008E)
In this circuit the gain decreases as the input signal intensity increases. The circuit is from a...
FM Spy (CB21689E)
This well-known circuit is another version of a 2-transistor transmitter found on the Internet. In this...
High Gain Preamplfier (MSB023E)
A 25 mVpp applied to the input of this circuit produces in the output a 1 Vpp signal. The...