Modulator Amplifier (V1574E)

This circuit is from a 1938 tube manual. Transformers are the critical components. Component values are given.

Series of Low Power Regulated DC DC Converters
August 2017 - Mouser Electronics announced the availability of a full range of Mean Well regulated DC-DC...
Touch switch CA3130 (CIR22003E)
Found in an English documentation from 1977, this circuit activates a relay according to the...
Bistable with two 555 (CB1294E)
This circuit appears in other articles in this section, but it is very interesting. It is a...