Tung Sol 6L6GC-STR Power Tube
The original Tung Sol 6L6GC-STR tubes have a reputation for being some of the best quality, warmest sounding and most evenly balanced 6L6 tubes going around.
These 6L6’s are like vintage NOS tubes without the NOS price tag. They can take a plate 6L6GC tube that is rated for plate voltage up to 500V and up to 30 watts of power.
The ultimate in musical tone and smooth overdrive, the STR delivers the sound that established Tung-Sol as the benchmark of quality. Built to the same “Special Tube Request” specs of leading amplifier manufacturers of the 1960s, the 6L6GC STR is a rugged and reliable power tube for use in the most demanding guitar amplifier circuits.
A bit about the 6L6
Radio Corporation of America (RCA) introduced the 6L6 vacuum tube in mid 1936, it was widely used in many applications, military included. It quickly found popularity in guitar amplifiers. The original 6L6 valve was contained within a black metal tube or casing.
Later the 6L6G had an all glass envelope which improved the radiation cooling of the anode.
Other versions of the 6L6 valve included the 6L6G, 6L6GA, 6L6GB, and the final version which was the 6L6GC – these all had glass envelopes.
For more technical information, read here.