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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Basic regulator using operational (CB9962E)
In the figure we have the typical configuration of a voltage regulator based on an operational amplifier....
Ohmmeter (CB5933E)
This circuit makes use of a 741 single source operational amplifier to measure resistors on a...
Triggered Astable 4011 (CB24860E)
Active with the output at the high level, this oscillator was found in November 1984 Radio...