Tung-Sol is a brand owned by the American New Sensor Corporation and manufactured at the Xpo-Pul - Reflektor factory in Saratov, Russia. The Tung-Sol 6V6GT beam power tetrode tube was the preferred OEM tube for vintage Fender Tweed and Deluxe amps. The Tung-Sol 6V6GT has a geometry designed to safely handle the higher plate voltages used in guitar amps, plus its heavier plate and grid materials ensure a robust and reliable tube under extreme conditions. The Tung-Sol 6V6GT breaks up evenly from low E to high up the neck. A favourite tube for Blues Players. It is rated for up to 315V plate voltage.
Open Datasheet - 6V6GT