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Tube Database (7,341 tube types · 1,270 archive entries)

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Test instrument record

Heathkit IT-21

Heathkit

Heathkit

Type B
Tube
Archive ID
4txjtvwu
Type
Dynamic Mutual Conductance
Country
USA
Model
Heathkit
Brands
Heathkit
Archive ID
4txjtvwu
Type
Dynamic Mutual Conductance
Type B
Tube

Heathkit IT-21 tester details