30 MHz Amplifier (CB5939E)

This low noise circuit was obtained from a 1980s US RF publication. Transistors used are uncommon today and the gain is 19 dB..

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RP510L Step-Down 4-A DC-DC Converter
May 2017 - This new Ricoh 4 A current device is now available from Mouser Electronics. The device...
Preamplifier Using a PNP Transistor (CB239E)
This preamplifier is indicated for low and high-impedance sources as microphones, transducers,...
Tachometer and Audio Meter (CB4126E)
This circuit was found in an American 1980s documentation. It is a circuit that can be used to...