This commercial transistor tester circuit (EICO 666) is from a Japanese publication from the 1960s. The switch selects the types of test with the switching of the terminals and the gain ranges.
Using 18 or 24 MHz crystals, this circuit is intended for producing reference signals with...
This circuit shows on the instrument the effective value or RMS of the input voltage. The diodes are...
Found in an 90s Electronic Design, this circuit provides a 110 dB output to a ceramic transducer....