RS Flip Flop (CB8925E)

This circuit was found in a 1969s American documentation. With modern components, it can be used as a shield.

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Turntable Preamplifier (CB19172E)
This RIAA equalizer preamp was found in a 1990s schematic. The transistors are an old version of...
800 Hz Tone Generator (CB25518E)
This 555 circuit was found in the October 1992 issue of Radio Electronics magazine. A power stage...
2-Transistor Commercial Radio (CB18387E)
We found the circuit for this commercial radio in Japanese documentation from the 1960s. The...