RCA Radiotron Type 75 ST Bottle Audio Radio Amplifier Tube 539C TEST NOS 🌊
USD 11.99 USD
Specifications
| Brand | RCA |
| Type | Vacuum Tube |
| Country Of Origin | United States |
Mutual Conductance (GM)Test: 24 ( 24 = NOS AVERAGE & 16 = Good MINIMUM). Test results will vary between testers as it is not an exact science. I also use variac at 120 volts with my testers.
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