Tung-Sol Lamp Works was established in 1907, Newark New Jersey USA. The brand name Tung- Sol is a contraction of the syllables ‘Tungsten’, the material used to make the filament from in a tube, and ‘Sol’, the Latin word for sun.
In the first years of their existence Tung-Sol made foremost head- and pilot lamps for the automotive industry. Tung-Sol made the first headlights for automobiles and was also credited for the flashing turn signal.
Tung-Sol incandescent car lamps
Starting in the twenties of the 20th century, Tung-Sol entered the field of manufacturing vacuum tubes. They were striving for perfection and their process of making tubes was governed by laboratory-standards and strict quality control. In the years to come Tung-Sol became a major player adjacent to RCA, GE and Sylvania in the market for vacuum tubes.
The most famous Tung-Sol tube is the 6550 beamtetrode introduced in 1955. This powertube is used in amplifiers with plenty of power like the Ampeq SVT bassamps and the Marshall 50 and 100 guitar amplifiers, produced between 1974 and 1986 for the US market. The EL34 was seen in the US as rather unreliable.
“Cokebottle” Tung-Sol 6550
A nice YouTube movie about 6550 Tung-Sol tubes can be found at:
Introduction to Tung Sol 6550 Tubes
Tung-Sol is now owned by the New Sensor company and we sell their Tung-Sol tubes as our premium brand.
Tube poweramplifier with twelve 6550's