1940s National-Union 5Z3 Rectifier Tube – Hickok 539B tests @ 88/104, Min:54/54
USD 23.95 USD
Specifications
| Country Of Origin | United States |
| Model | 5Z3 |
| Type | 5Z3 |
| Brand | National-Union |
Hickok 539B tested. Hickok 539B is a mutual conductance (Gm) type tube tester. (Plate#1 / Plate#2). <<<<<<>>>>>>.
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