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.
For the 400 to 500 MHz bands, this circuitry found in an 80's documentation uses a very critical...
We found this circuit in an old documentation for hams. In it we have the way to use a varicap to...
The SN72741 integrated circuit is nothing more than the version of Texas Instruments of the known...