TRONIX EY81 – QUAD 4 PCS
GRADE: GOLD SERIES | VINTAGE NOS SPEC
Genuine Tronix
Long Grey Plate
Top Ring Getter
Top Anode Cap
High-Voltage Booster Diode
Noval 9-Pin Base (B9A)
New in Original Box
Long Grey Plate
Top Ring Getter
Top Anode Cap
High-Voltage Booster Diode
Noval 9-Pin Base (B9A)
New in Original Box
Up for sale is a quad set (4 pieces) of vintage Tronix EY81 high-voltage booster diode tubes, brand new in their original factory red-and-white boxes. Constructed with clear glass envelopes, internal long grey plates, top ring getters, and top anode connections, these classic Noval-base (B9A) tubes are widely used in vintage TV restorations, special power supply circuits, and custom audio applications.
As shown, all four tubes are in pristine New Old Stock (NOS) condition with bright white factory printing and intact original boxes.
| Parameter | Specification / Marking | Details |
|---|---|---|
| Brand / Manufacturer | Tronix | Original Factory Branding |
| Tube Designation | EY81 (6R3) | Booster Diode / Half-Wave Rectifier |
| Base & Construction | Noval 9-Pin (B9A) with Top Cap | Long Grey Plate, Top Halo Getter |
| Condition | New Old Stock (NOS) | Unused in Original Red & White Boxes |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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