This circuit was found in an ancient American documentation. With it is possible to double the frequency of a transmitter For the range of 6 meters obtaining 8 W. The circuit makes use of varicap.
This S-meter or signal strength meter, was originally designed for the 80's Regency receiver, but can...
Mouser Electronics has in stock the Texas Instruments TPS7A90 Low Voltage Dropout (LDO) Linear...
This circuit is connected to the sum key of a common calculator. Adjusted to produce a pulse per...