Strobe (CB22221E)

This circuit uses a special 1950's RCA strobe tube. It can be built with equivalent components for the rest of the circuit.

Stereo Indicator (CB23520E)
This circuit was found in a Radio Electronics magazine from August 1963. The transistors are...
Sequential Tone Recognizer LM567 (CB12669E)
In the figure we have a circuit in which the second tone recognizer remains disabled until the...
Adjustable Space Mark Rectangular Converter (CB12172E)
This circuit was found in a 1980 publication. This circuit converts a triangular input signal into...