MULLARD 6080 METAL BASE – 4 PCS
GRADE: GOLD SERIES | LABORATORY VERIFIED NOS
Triple Mica
Black Plates
Ring Getter
Original Haltron Boxes
Amplitrex AT1000 Tested
Up for sale is an exceptional matched quad lot of 4 vintage Mullard 6080 dual power triode valves, brand new in their original vintage yellow/blue Haltron boxes. Made in the USA, these heavy-duty industrial valves feature rugged metal base shells, robust triple mica vibration-resistant internal construction, deep black plates, and top-mounted ring getters.
As featured in all 4 units have been thoroughly bench-tested on our laboratory-grade Amplitrex AT1000 digital tube testing system. The measured plate current Ip and transconductance Gm results are calculated against factory specifications 100 mA / 5800 uMhos and organized below.
| Serial No. | Tube Section | Plate Current (Ip) | Transconductance (Gm) | ||||
|---|---|---|---|---|---|---|---|
| Factory Spec | Result | % Ip | Factory Spec | Result | % Gm | ||
| SR. 336004 | Triode 1 | 100.0 mA | 99.2 mA | 99% | 5800 uMhos | 5730 uMhos | 99% |
| Triode 2 | 100.0 mA | 81.2 mA | 81% | 5800 uMhos | 5310 uMhos | 92% | |
| SR. 336009 | Triode 1 | 100.0 mA | 87.6 mA | 88% | 5800 uMhos | 5650 uMhos | 97% |
| Triode 2 | 100.0 mA | 85.4 mA | 85% | 5800 uMhos | 5720 uMhos | 99% | |
| SR. 336014 | Triode 1 | 100.0 mA | 93.0 mA | 93% | 5800 uMhos | 5800 uMhos | 100% |
| Triode 2 | 100.0 mA | 96.3 mA | 96% | 5800 uMhos | 5610 uMhos | 97% | |
| SR. 336019 | Triode 1 | 100.0 mA | 75.6 mA | 76% | 5800 uMhos | 5310 uMhos | 92% |
| Triode 2 | 100.0 mA | 86.0 mA | 86% | 5800 uMhos | 5770 uMhos | 99% | |
Note: Custom duties and taxes are the responsibility of the buyer in their country.
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