This amplifier for the 10 m (30 MHz) band has a gain of 12 to 15 dB having been found in an American documentation. Other RF transistors can be used like 2N2222 or 2N2218.
This coupler allows the triggering of a TTL port or flip-flop from an SCR. The resistor R must be...
This amplifier with very high input impedance was suggested by Texas Instruments in a manual of...
This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of...