1960s GE 5U4GB 5AS4A Rectifier Tube – Hickok 539B tests @ 120/128, Min:54/54
USD 34.50 USD
Specifications
| Country Of Origin | United States |
| Type | 5U4GB / 5AS4A |
| Model | 5U4GB / 5AS4A |
Hickok 539B tested. Hickok 539B is a mutual conductance (Gm) type tube tester. Tube features grey smooth plates and a side-mounted 'Rectangular' getter construction. (Plate#1 / Plate#2). <<<<<<>>>>>>.