We found this circuit in a 1967 documentation. The integrated circuit and an operational one of the time. Modern equivalents can be tried out. The power supply is symmetrical.
This General Electric circuit is from the 80's. The PUTs used in this meter are not common...
The DC output of this circuit corresponds to the RMS value of the input voltage. The circuit is...
This circuit with different colored indicator LEDs has an expanded scale. We found it in the March...