Indicated for discriminators adjustment in FM and VHF receivers, this circuit was found in a 90s 73 magazine for radio amateurs. The operational amplifier can be a general-purpose type.
This antenna preamplifier can work with signals from about 20 MHz to 100 MHz, depending only on...
This 1 kW circuit was found in documentation from the 90s. The sensor is a thermistor, and the...
This circuit was found in an American documentation from the 90's. The circuit is intended for...