This 50 kHz to 250 W circuit was found in an old RCA documentation. The transformer is a commercial type of the time and the output voltage is 80 to 90 V.
We found this shield circuit in the SGS Integrated Circuits Manual of 1982. The circuit is...
This circuit with transistors and a crystal microphone appeared in Radio Electronics magazine in...
This circuit amplifies the signals in the UHF band starting at 470 MHz, reaching just over 900...