RCA JAN-807 – MATCHED BEAM POWER TETRODE QUAD (4 PCS)
Made in USA
Black Plate
Double Square Getter
Brown Base
Beam Power Tetrode 807
New in Original GVT Boxes
Amplitrex AT1000 Tested
Up for sale is a closely matched quad (4 pcs) of vintage New Old Stock (NOS) RCA JAN-807 military-specification beam power tetrode vacuum tubes, complete in their original government-issue GVT boxes. Manufactured in the USA by RCA under strict Joint Army-Navy specifications, these heavy-duty power valves feature rugged black plates, bottom double square getters, low-loss brown bases, top anode caps, and classic ST glass envelopes. Revered by high-end audio builders and musicians for their commanding headroom, rich harmonic warmth, muscular bass response, and exceptional longevity in push-pull and single-ended tube amplifiers.
All four tubes have been precision tested on an Amplitrex AT1000 digital tube tester. Measured Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to nominal factory reference specifications (Reference: 72.0 mA / 6,000 uMhos) are detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO:2640244 | Beam Power Tetrode | 72.0 mA | 70.0 mA | 97% | 6000 | 5900 | 98% |
| SR.NO:2640235 | Beam Power Tetrode | 72.0 mA | 70.4 mA | 98% | 6000 | 6000 | 100% |
| SR.NO:2640240 | Beam Power Tetrode | 72.0 mA | 70.5 mA | 98% | 6000 | 5960 | 99% |
| SR.NO:2640254 | Beam Power Tetrode | 72.0 mA | 67.6 mA | 94% | 6000 | 5900 | 98% |
807 Tube Made by RCA in 1940s or early 1950s ; Earliest Version, one of the best 807. Much better than the later 50s or 60s or 70s version.
807=ATS25=VT60 is a 5-pin 6L6G/KT66/EL37/350B ;specs are the same , but the pin-layouts are different. So you can buy 807-to-6L6 adapter to use 807 in 6L6G amps
(807=ATS25=VT60 + adapter) = 6L6G/KT66/EL37/350B
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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