Made in USA
Black Plate
Chrome Dome
Up for sale is a matched pair of Sylvania 6V6GTA beam power pentodes, widely regarded as some of the finest American production 6V6s. These specimens feature the iconic Chrome Dome top and highly desirable Black Plates. These are genuine New Old Stock (NOS) and come in their original factory boxes.
Precision tested on our Amplitrex AT1000 digital laboratory system, the results below utilize the Percentage Method against original factory design-center specifications (Ip = 45.0 mA / Gm = 4100 µMhos). Both tubes test at or above 100% for transconductance, ensuring healthy, high-gain performance.
| Serial No. |
Parameter ip mAdc |
Result ip mAdc |
% Ip (Emission) |
Parameter Gm uMhos |
Result Gm uMhos |
% Gm (Transc.) |
| 2702001 |
45.0 |
55.4 |
123.1% |
4100 |
4680 |
114.1% |
| 2702002 |
45.0 |
38.2 |
84.9% |
4100 |
4100 |
100.0% |
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
Note: Extended area surcharges may apply for remote addresses; please confirm before checkout.
Quality Verified Since 1970
Specializing in thoroughly tested and screened quality vacuum tubes.
Testing equipment includes Amplitrex AT1000, Hickok 752a, and AVO Type 160.
Precision Verified — NOS Audio Tubes