This week, VotW is another monster. The mighty 6C33 triode is a living dinosaur from the cold war.
'So your MiG fighter jet's radar scope just isn't picking up bogeys like it used to? Time to re-tube the 6C33! This Russian Military 6C33C-B also works great in home stereos. If you own a Balanced Audio Technology VK-55, VK-60, VK-75, or VK-150 amplifier these 6C33 tubes are exactly what you need.' quote: tubestore.com
It was indeed used in the MiG fighter as a voltage regulator for the aircraft's avionics. As a thermionic device it was thought to provide protection and invulnerability to EMP during a nuclear conflict.
These days, they are popularly used in transformerless (OTL) amplifiers to great effect.
This example is Ulyanov produced. The other major manufacturer was Svetlana. They ceased production in 1980, so examples of those valves are quite rare.
The tube is 130mm high and 65mm in diameter. Made from hardened glass, it operates at an astonishing 300C.
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