RARE VINTAGE GEC TT22 – SINGLE TUBE 1 PC
GRADE: PLATINUM SERIES | VINTAGE NOS UK BEAM POWER TETRODE
TT22 Beam Power Tetrode
Long Black Plate
Double Side Ring Getter
Metal Base & Top Anode Cap
New in Original GVT Box
AVO Type 160 Tested
Up for sale is a single ultra-rare vintage GEC TT22 high-power beam tetrode vacuum tube, brand new in its original GVT box. Manufactured in England by The General Electric Co. Ltd. (GEC), this flagship valve features iconic long black plates, a heavy-duty metal base, top cap anode connection, and double side ring getters. Legendary among high-end audiophiles and amplifier designers for offering KT88-class performance with superior high-voltage isolation and outstanding sonic clarity.
As shown, this tube has been thoroughly tested on a professional laboratory-grade AVO Type 160 tube tester. Anode current ($Ia$) and mutual conductance ($mA/V$) measurements alongside percentage performance ratings relative to nominal factory specs are detailed in the table below.
| Serial No. | Anode Current (Ia) | Mutual Conductance (Gm) | ||||
|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ia | Ref Spec | Result | % Gm | |
| SR.NO. 3194015 | 65.0 mA | 76.0 mA | 117% | 5.5 mA/V | 7.0 mA/V | 127% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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