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 circuit is based on the voltage drop of the diodes in conduction, in the order of 1.6 to 1.7...
This protection circuit trips by quickly blowing the fuse in the event of an overcurrent. The circuit is...
We found this circuit in an English publication from 1963. The circuit uses germanium transistors of the...