We found this circuit in the March 1999 issue of Electronics Now magazine. The indicator used is an analog type. The values indicated depend on the calibration.
This circuit makes the RIAA equalization of signals obtained from a record player for recovery in other...
This is a diagram of a 1958 commercial receiver. The circuit was found in documentation at the...
This circuit uses an 18 MHz crystal to generate 36 MHz signals. We found it in an 80's...