HITACHI 6SN7GTB Matched pair – 2 PCS
GRADE: GOLD SERIES | LABORATORY VERIFIED NOS JAPANESE SPEC
Genuine Hitachi (Japan)
Black Long Plates
Top Ring Getter
Black Base
New in White Box
Amplitrex AT1000 Tested
Black Long Plates
Top Ring Getter
Black Base
New in White Box
Amplitrex AT1000 Tested
Up for sale is a matched pair of 2 vintage Hitachi 6SN7GTB dual triode preamplifier and driver valves, brand new in white boxes. Made in Japan, these premium Japanese audio tubes feature highly desirable black long plates, a top ring getter, durable black bases, and rich, dynamic sonic performance.
As shown in both tubes have been bench-tested on our laboratory-grade Amplitrex AT1000 digital tube testing system. The measured plate current (Ip) and transconductance (Gm) results are calculated against standard factory specifications (9.0 mA / 2600 uMhos) and detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Transconductance (Gm) | ||||
|---|---|---|---|---|---|---|---|
| Factory Spec | Result | % Ip | Factory Spec | Result | % Gm | ||
| SR: 1855007 | Triode 1 | 9.0 mA | 6.4 mA | 71% | 2600 uMhos | 2600 uMhos | 100% |
| Triode 2 | 9.0 mA | 7.4 mA | 82% | 2600 uMhos | 2800 uMhos | 108% | |
| SR: 1855008 | Triode 1 | 9.0 mA | 7.2 mA | 80% | 2600 uMhos | 2600 uMhos | 100% |
| Triode 2 | 9.0 mA | 8.8 mA | 98% | 2600 uMhos | 2800 uMhos | 108% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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