Tung-Sol ONE (1) 6SL7GT dual triode AT1000 TESTED Vacuum Tube greyglass 6SL7 1941-1975

This listing is for one (1) 6SL7GT dual triode 6SL7 vacuum tube in the straight-walled glass tube shape. It has a brown or black octal base, grey or black glass from a coating used as an RF shield in early tubes, black plate, and foil or square bottom getter.

Your tube has been fully tested on a computer-regulated, USA-made Amplitrex AT1000 on Fixed Bias setting with used good results. It has also passed shorts and gas tests. The tube might have mechanical wear or have the label rubbed off - these are very old! Tubes that test like new (tNOS) are available in a separate listing. Every tNOS or Used Good tube you receive from Sound By Doc is guaranteed against failure for 60 days after purchase, an industry extreme!