6SL7GT Sylvania JAN 1940's - 1950's
3 pair) VT-229=JAN-CHS-6SL7GT Sylvania NOS round black plates,
1" gray heatshrink around part of glass and base
to hold base in place 1944-1945 $50 ($105/pair, highly recommended, best in stock)<---
(British companies used to add heatshrink on some vacuum tubes, these are from the UK)
(1 Platinum Pair all 4 triode sections match within 1-3% $150/pair, best in stock)
1 tube) VT-229=JAN-CHS-6SL7GT Sylvania low hours/like new round black plates 1940's $55
8) JAN-CHS-6SL7GT Sylvania NOS black base, gray plates, green printing 1952 $75/pair (3 pair)
($100/platinum 1-3% matched pair, recommended, superb overall sound)
6SN7因字太少没查到。