The operating frequency of this circuit is 465 Hz and the input voltage is 12 VAC. The circuit is 65% efficient. We found it in a 1968 Motorola publication.
This common gate circuit for the 13 to 30 MHz band was found in old English documentation....
This circuit was originally found in a Philips documentation from 1969. It is intended for sensing...
This FET voltmeter is from an old 1974 amateur radio publication. The circuit can use MPF102 or...