6VDC Amplifier (T485E)

This drum amplifier was found in an American documentation from 1947. It makes use of a mechanical vibrator to generate high voltage for the tubes.

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Four Channel Mixer (Cb13613E)
We found this circuit in a 1974 integrated circuit manual. Operational amplifiers can be of...
Triggered 4011 Oscillator (CB16072E)
This oscillator can be used as a CIock-Triggered for various electronic applications. Oscillation only...
Ocean Sound Generator (CB25489E)
This circuit called “surf man” was published in the August 1992 Radio Electronics magazine. It...