Owned by Mike Mathews and run from its head offices in NYC, the manufacturing plant is actually the old

Expo-Pul factory in Saratov that is currently manufacturing audio valves by Sovtek, Electro-Harmonix, Genalex, Mullard, Tung-Sol and Svetlana

https://www.svetlana.com/ News story https://www.6moons.com/industryfeatures/newsensor/newsensor.html

The Sovtek and Electro-Harmonix 6H30 are exactly the same construction ,BUT= the E.H versions are specially selected for strength and then gold-pinned for the E.H range,this version is highly recommended for users of Audio Research/Conrad Johnson/BAT/Consonance CD players and pre-amps.

[Matched Pairs available on request]

UK PRICES