Audio Cable Tester (CB3827E)

This simple circuit tests both monophonic and other two-wire audio cables. The circuit is powered by two common batteries.

Ammeter (CB19741E)
The integrated circuit of this instrument is not common today. Equivalent operational can be...
Time Base Generator (CB10427E)
This circuit was found in a Radio Electronics Constructor, English magazine from April 1976; The...
1 to 500 V voltmeter (CB18548E)
The accuracy of this simple circuit depends on the accuracy of the input circuit resistors. Any...