This RF amplifier step has a dynamic range of 140 dB and can amplify signals from 0.5 to 40 MHz. FET is old, but modern equivalents can be used.
September 2016 - It can be obtained from Mouser Electronics new LED indicators for panel mounting...
This circuit can provide constant currents adjustable between 1 and 10 mA. The transistors can be...
This circuit is from American documentation from the 90s. The configuration is very current and can...