Tesla / 6X4/EZ90/6Z31-TESLA

6X4/EZ90/6Z31-TESLA Click on image(s) above to view larger
£8.50

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Tesla started production in 1922 under its original name of Radioslavia Ltd in Czechoslovakia. It has a long history of manufacturing high quality transmitting valves and defense equipment. The Tesla factory was known for making some outstanding valves. The Original EL34 better in terms of microphonics and reliability than the famous Mullard EL34, hence Marshall used the Tesla EL34 from the mid 1970ís onwards. The frame grid E83CC was due to its construction the most expensive of it type to produce. Still to this day it is one of the best sounding ECC83/12AX7 types ever made. These are just a few of an endless list of pioneering valves produced by this great Czechoslovakian factory that sadly is no longer with us.
Very high quality original Czech made Tesla 6X4 EZ90 with the original 6Z31 markings.
These date from 1972 and were military contract issued and made at the Zavod Trintec factory and have the factory code of 32 on the glass with the original Tesla Yellow print.

These valves are an audio bargain and are excellent in mobile applications such as the Hammond organs used by many touring bands as they are mechanically and vibration proof. These have solid internal anode supports bracing that run the length of the anode plates.
These valves have proved to be excellent in in all audio applications in vintage amps and Hammond organs.

They offer outstanding audio sound quality at a price below the American and British made 6X4 EZ90.

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