This is a restored and calibrated Triplett 3423 tube tester. The 8-pin Octal Socket has been replaced and a 9-pin miniature and 8-pin Octal socket saver have been installed. The
Triplett Tube Testers
This is a restored and calibrated Triplett 3423 tube tester. The 8-pin Octal Socket has been replaced and a 9-pin miniature and 8-pin Octal socket saver have been installed. The