disarmamant
01-01-2018, 18:26
Matched pair of Tung Sol 5691's, ruggedized version of the 6SL7GT with extra support rods and double top mica. These were made by RCA.
New old stock in original boxes. These are probably some of the best 6SL7's ever made. They test perfectly to spec and are matched very well between all the triode sections.
The best for a 6SL7 phono stage.
https://dl.dropbox.com/s/gqrqbm9csr3u8go/pair%20side.jpg?dl=0
https://dl.dropbox.com/s/0p3j5v5jqqdunb8/boxes%20side.jpg?dl=0
https://dl.dropbox.com/s/12urv3n0rik6a8g/pair%20upright%20close.jpg?dl=0
https://dl.dropbox.com/s/l4ivgyp6wowopha/box%20top.jpg?dl=0
https://dl.dropbox.com/s/ggyibwhlwht8bhm/pair%20upright.jpg?dl=0
https://dl.dropbox.com/s/qyocu0kd5d7gcjk/double%20mica%20and%20support%20rods.jpg?dl=0
Test results
Valve #1 section 1: Ia=2.7mA GM=1.75mA/V
Valve #1 section 2: Ia=2.6mA GM=1.8mA/V
Valve #2 section 1: Ia=2.7mA GM=1.8mA/V
Valve #2 section 2: Ia=2.6mA GM=1.8mA/V
£158 including RMSD to UK address.
New old stock in original boxes. These are probably some of the best 6SL7's ever made. They test perfectly to spec and are matched very well between all the triode sections.
The best for a 6SL7 phono stage.
https://dl.dropbox.com/s/gqrqbm9csr3u8go/pair%20side.jpg?dl=0
https://dl.dropbox.com/s/0p3j5v5jqqdunb8/boxes%20side.jpg?dl=0
https://dl.dropbox.com/s/12urv3n0rik6a8g/pair%20upright%20close.jpg?dl=0
https://dl.dropbox.com/s/l4ivgyp6wowopha/box%20top.jpg?dl=0
https://dl.dropbox.com/s/ggyibwhlwht8bhm/pair%20upright.jpg?dl=0
https://dl.dropbox.com/s/qyocu0kd5d7gcjk/double%20mica%20and%20support%20rods.jpg?dl=0
Test results
Valve #1 section 1: Ia=2.7mA GM=1.75mA/V
Valve #1 section 2: Ia=2.6mA GM=1.8mA/V
Valve #2 section 1: Ia=2.7mA GM=1.8mA/V
Valve #2 section 2: Ia=2.6mA GM=1.8mA/V
£158 including RMSD to UK address.