PL509-TESLA-SINGLE PL509-TESLA-SINGLE Click on image(s) above to view larger

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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.
PL509 was originally designed as an output valve for colour televisions.

In the early 1990ís this valve was used in many high end professional studio a audio amplifiers. These amplifiers, which are now being reissued with a price tag of £10,000 are using a valve that is not in production anywhere in the world so will be Impossible to source in future.

These original Tesla PL509 valves were made in Czechoslovakia in 1982 and come in the original Tesla boxes. We have a small stock of unmatched items which will be of particular interest to those of you who have cathode biased OTL amplifiers

This is a rare chance to buy this outstanding audio tube that can be used in many OTL designs



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