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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Remote Amplifier (CB23728E)
This two-microphone amplifier was found in a April 1961 Radio Electronics Magazine. The circuit is...
Pulse Generator 4093 (CB19413E)
The integrated circuit of this pulse generator is 4093 and the frequency can be between a fraction of...
Video preamplifier (CB8741E)
Found in 90s Radio Electronics, this circuit is intended for amplifying analog video signals....