The Electro-Harmonix EH EF86 is a later entry into the valve market and was designed as a low noise pentode. This is unusual used a as pre-amp valve and unusually is a small pentode
It is manufactured in Russia and is a very durable valve. This is a faithful up to date version of the EF86 of the 1950’s. The first EF86’s arrived on the market in 1954
It is fully tested by us on our AVO vintage testers
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We also give a 180 day from receipt warranty on the product ( excludes user caused mechanical damage ) for peace of mind .