This intermediate frequency amplifier step using 2 junction FETs has a gain of 20 dB. The pass band is 4 MHz. FETs are for general use, with several types that serve in this circuit as BF245.
This circuit is from an English magazine from 1980, but it can be easily assembled with more...
Found in Philips' 1968 documentation, this circuit serves as a 6.3 V reference for high stability. |...
In critical applications of the RS-232 interface, the danger of induced voltages in the cables must...