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General| Type | Tube Tester |
|---|---|
| Manufacturer | Hickok |
| Model | 539C |
| Power Supply | AC |
| Line Voltage | 117 VAC |
| Test Types | Emission, Mutual Conductance |
| Socket Types | 4-pin, 5-pin, 6-pin, 7-pin, 8-pin, 9-pin, Loctal, Compactron |
| Weight | Approximately 25 lbs |
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