This transmitter emits a modulated signal at a frequency given by the first transistor in the phase shift oscillator. The circuit is from an Australian publication from 1991.
The purpose of this circuit is to allow common analog multimeters to measure low resistances, on...
This is the circuit of the N-201 commercial multimeter of the analog type. The circuit is from...
This receiver was found in the Radio Electronics magazine of March 1953. It tunes to the medium wave...