This circuit was found in a 1968 Hughes documentation. The transistors are from that time. The coil is for the medium or short-wave range.
This amplifier for the 10 m (30 MHz) band has a gain of 12 to 15 dB having been found in an...
Found in American documentation from the 90s, this circuit passes frequencies above 1 kHz. The...
Found in 1990s documentation, this circuit tests both PNP and NPN transistors by providing status...