- HK Island, Hong Kong
- Jun 3rd
One(1) Twin Triode Switch for Hickok Tube Testers - Model 7608B (Noval 9-pin) Why should I use a Twin Triode Switch on my Hickok? You may have noticed that most popular Noval basing (9-pin) twin triodes use setting 76080 on triode #1 and 21030 on triode #2, it is a lot of fiddle around and causes tube tester mechanical wear. This gadget will simplify your work, for fast, accurate and consistent test results while minimizing tube tester mechanical wear, making twin triode test nice and easy!