This can be considered a complete laboratory for the repair professional. A full featured signal tracer with 13 tubes. The circuit is from the March 1946 issue of Radio Craft.
Any high-gain Darlington transistor can be used on this touch circuit. The load can be formed by...
This circuit is from an April 1991 Radio Electronics magazine. The circuit uses power MOSFETs and...
We found this circuit in a 1980s Linear Technology documentation. The components are from the...