This RF circuit measures transmission power from 0.25 W to 10 W. The maximum frequency depends on the diode and the gauge is an analog instrument. A multimeter can be used instead.
This circuit by Ferranti, in a 1967 publication, is intended for reading perforated tapes. The...
We found this electronic analog multimeter in a 1998 documentation. What sets it apart from...
This circuit with transistors of the time was found in the November 1972 Radio Electronics...