This circuit for car engine spot adjustment was found in an 80's Radio Electronics. The circuit makes use of a xenon lamp and the pulse transformer must have a turn ratio of 1:50.
Obtained in an American documentation from 1976, this circuit has a constant current source for...
This circuit was obtained in a 1982 English magazine. The purpose of this circuit is to interface...
Found in a 1960 Sylvania manual, this circuit is intended to measure audio signals frequency....