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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Electronic Brooder (CB4455E)
This circuit controls the temperature of heating elements, which may be lamps covered with...
Biestable unijunction (CB6807E)
Obtained in documentation from General Electric this circuit consists of a biestable with...
Unity Gain Second Order Filter (CB25596E)
This low-pass filter with 741 op and symmetrical source was found in the August 1993 issue of...