Genuine Mullard (UK)
Military Grade CV5008 / 6080WA
Metal Base
Triple Mica
Black Plates
Ring Getter
New in Chelmer Box
Amplitrex AT1000 Tested
Up for sale is a matched pair of 2 vintage Mullard 6080 / CV5008 / 6080WA dual power triode valves, brand new in original Chelmer Valve boxes. Built to high-reliability military specification standards, these British power tubes feature rugged metal bases, microphonic-reducing triple mica construction, deep black plates, and top ring getters.
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 100 mA / 5800 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: 324004 |
Triode 1 |
100.0 mA |
113.5 mA |
114% |
5800 uMhos |
5620 uMhos |
97% |
| Triode 2 |
100.0 mA |
82.2 mA |
82% |
5800 uMhos |
4960 uMhos |
86% |
| SR: 324018 |
Triode 1 |
100.0 mA |
80.4 mA |
80% |
5800 uMhos |
4870 uMhos |
84% |
| Triode 2 |
100.0 mA |
85.8 mA |
86% |
5800 uMhos |
5060 uMhos |
87% |