TUNG-SOL 6SL7GT — Matched Pair

Half Black Coated Glass Black Base NOS USA Production Amplitrex AT1000 Digital Testing

Available here is a premium matched pair of vintage Tung-Sol 6SL7GT dual triodes. Recognized by their unique Half Black Coated Glass and sturdy Black Bases, these American-made valves are famous for providing a lush, musical response in high-gain audio circuits and phono preamps.

Each tube has been meticulously tested on our Amplitrex AT1000. Using the Percentage Method, we have compared the measured results against 100% factory specifications for a new 6SL7GT (Ip = 2.3mA / Gm = 1600 µMhos).

Serial No.	Side	Param Ip	Result Ip	% Ip	Param Gm	Result Gm	% Gm
#2704012	T1	2.3	2.5	108%	1600	1600	100%
	T2	2.3	2.7	117%	1600	1800	112%
#2704013	T1	2.3	2.2	95%	1600	1500	93%
	T2	2.3	2.6	113%	1600	1700	106%