Sylvania 12BH7A Vintage Vacuum Tube Gray Plates Top Round Getter NOS (Test 109%)
As you can see in the photos, the original box is included, to which we'll add some cotton to help reduce shock during transit.
The NOS Gm Specification you see below represents the manufacturer's expected value. In other words, if you could travel back in time to the manufacturer's factory and tested every tube on the production line, this would be the average. Anything greater than 70% is generally acceptable and usable, with performance and life increasing as the number approaches 100% or more.
If you have any questions, please contact us. We've been selling tubes for over ten years, and would be happy to assist in any way we can!
The tube(s) in this sale have been carefully screened to ensure your satisfaction. We meticulously inspect each tube for loose parts, faded getter flashing, heat-stressed plates, and more. Furthermore, testing was performed on the world's most advanced tube tester, the Amplitex AT-1000. This $2800 piece of equipment is second to none when it comes to accuracy and reliability. This tester also allows us to test for proper plate current, heater-to-cathode leakage, and gas leakage... something very few other tube testers can offer!
With all of this in mind, the tube(s) in this sale include a 30-day satisfaction guarantee. If you are unhappy with your purchase for any reason, you can return them for a full refund! All we ask is that you contact us prior to opening a return. More often that not, we are able to remedy the situation with direct communication.
The NOS Gm Specification you see below represents the manufacturer's expected value. In other words, if you could travel back in time to the manufacturer's factory and tested every tube on the production line, this would be the average. Anything greater than 70% is generally acceptable and usable, with performance and life increasing as the number approaches 100% or more.
| NOS Gm Specification | 3100 | 3100 |
|---|---|---|
| Test Results | 3500 (113%) | 3270 (105%) |
If you have any questions, please contact us. We've been selling tubes for over ten years, and would be happy to assist in any way we can!
The tube(s) in this sale have been carefully screened to ensure your satisfaction. We meticulously inspect each tube for loose parts, faded getter flashing, heat-stressed plates, and more. Furthermore, testing was performed on the world's most advanced tube tester, the Amplitex AT-1000. This $2800 piece of equipment is second to none when it comes to accuracy and reliability. This tester also allows us to test for proper plate current, heater-to-cathode leakage, and gas leakage... something very few other tube testers can offer!With all of this in mind, the tube(s) in this sale include a 30-day satisfaction guarantee. If you are unhappy with your purchase for any reason, you can return them for a full refund! All we ask is that you contact us prior to opening a return. More often that not, we are able to remedy the situation with direct communication.
