TubeDatabase
Tubes
Testers
Companies
Submit
About
Heathkit IT-21
Heathkit
Heathkit
Heathkit
Permanentid
4txjtvwu
Type
Dynamic Mutual Conductance
Type B
Tube
Country
USA
Model
Heathkit
Brands
Heathkit
Heathkit IT-21 tester details
Lets discuss this tester