Pair of Sylvania 6SN7-GTB 3-hole black plate CHROME-Top Audio Tubes in great condition.
Truly beautiful sounding tubes... the famous Sylvania "Holy Grail" of audio pre-amp tubes! Both have very nice bright flashing and each tests strong as new and closely matched electronically to one another.
We've auditioned these in our amp and they sound wonderful, excellent vintage TONE you'll truly appreciate! Bring your amp back to LIFE with these fine vintage preamp tubes! Please see pictures above and test results below...
Tube Number 6SN7-GTB
Brand on tube Sylvania
Actual mfr Sylvania
Country of mfr USA
Plate style 3-hole black
Glass style Chrome top, clear glass
Date code 502/805, 611/822
Test results (typical NOS = 3000
Tube-1 = 3400/3400
Tube-2 = 3300/3300
Sold as is, guaranteed as described.
keyword: audio, 6l6gc, vacuum, electron, nos, nib, TUBES, VALVES, ROHR, LAMP, VALVOLA, 튜브, 管子, TUBO, チューブ, PUTKI