BEL EC81 GOLD PIN – 2 PCS
GRADE: GOLD SERIES | LABORATORY VERIFIED NOS
Top Ring Getter
Vintage BEL (Made in India)
New in Original Boxes
AVO Type 160 Tested
Up for sale is an exceptional, beautifully matched pair of 2 vintage BEL (Bharat Electronics Limited) EC81 UHF triode valves, brand new in their original factory boxes. These premium variants feature high-conductivity Golden Pins, clean clear glass envelopes, and a robust top ring getter design. Manufactured in India under strict quality controls, these classic tubes are highly prized for their low noise and excellent RF/audio performance.
As shown, this matched pair has been carefully tested on the legendary vintage AVO Type 160 military-grade valve characteristic meter. Both tubes show outstanding emissions and transconductance balance, confirming their New Old Stock (NOS) status against nominal factory parameters.
| Serial No. / Tube | Tube Section | Plate Current (Ia) | Transconductance (Gm) | ||||
|---|---|---|---|---|---|---|---|
| Factory Spec | Result | % Ia | Factory Spec | Result | % Gm | ||
| BEL EC81 (SR. 4710002) | Triode | 30.0 mA | 29.0 mA | 97% | 5.5 mA/V | 5.5 mA/V | 100% |
| BEL EC81 (SR. 4710007) | Triode | 30.0 mA | 28.0 mA | 93% | 5.5 mA/V | 5.5 mA/V | 100% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.













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