Tung-Sol 6550

In stock

Tung-Sol 6550

The 6550 beaming powertetrode for tougher loads.

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More Information
Tube type 6550
Manufacturer/Brand Tung-Sol
Production New
Tube kind Powertube
Construction Beaming Tetrode
Pin Layout Octal 8 pins
Country of Manufacture Russia

Tung-Sol 6550
This reissue of the original beaming powertetrode developed by Tung-Sol in 1955 is our premium 6550 power tube. The 6550 put on the market as a heavier power tube (100 Watts in complementary setup) than the EL34, 6L6 and 6CA7; The English counterpart of the 6550 came on the market a year later as the KT88.


Tung-Sol Lamp Works was founded in 1907 in Newark, NJ USA. The name Tung-Sol is a contraction of Tungsten or tungsten the element where the filaments in tubes and light bulbs are made and Sol what in Latin means sun. Advertising for Tung-Sol car bulbs Since the 1920s, Tung-Sol also started producing other electronic products, including electron tubes. Tung-Sol strived for perfection of its products by means of a manufacturing process under laboratory standards and strict quality control. The best known tube from Tung-Sol is the 6550 marketed in 1955 in response to the Genalex / Marconi KT88. The 6550 is a so-called 'beam tetrode' and can be found in amplifiers with a lot of power, for example in the Ampeq SVT bass amplifiers and Marshalls 50 and 100 Watt guitar amplifiers for the American market.

In addition to the our premium 6550 from Tung-Sol, we also sell the 6550 from Electro Harmonix