Created to serve as a booster for TV signals in the UHF band, this circuit was found in the March 192 Radio Electronics magazine. Assembly is critical, requiring a special board layout.
This circuit appears elsewhere on this site, but from different sources. Using the LM3900, we find this...
This interesting source or isolation transformer also allows to vary the output voltage by...
In this circuit the CA3140, an operational amplifier, is used as a comparator with the zener diode...