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Last PAIRS available "NEW OLD STOCK "USA SYLVANIA FOR BALDWIN 6SN7GT BLACK-PLATE 3-STAPLE HOLE (per side) "FAMOUS CHROME-TOP" AUDIO TUBE, excellent lushsounding, very rare blackplates from the USA, same tube construction was made for the United States Military but labeled VT231 WITH THE DESIGN. These rival the RCA 5692 redbase in sound and black-plate construction quality, and are as scarce. Sylvania labels, the construction of these to me look to be ENGINEERED VERY WELL AND NEVER TO BE MADE AGAIN!. VERY difficult to find these in PERFECT tubes! UNDER $240.00 A PAIR!
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TUBEMUSEUM NEW YORK
3-HOLE BLACK-PLATESANDTEST MEASUREMENTS LISTED BELOWOF THE TUBES YOU WILL RECEIVE
AMPLITREX AT-1000 DIGITALLY TESTEDSYLVANIA USA 6SN7-GT TUBES
6SN7GTB = SAME as GTA, but with CONTROLLED tube heat-up
Historic TubeMuseum, Tuxedo Park, New YorkEstablished in 1928 as a premier research facility in Tuxedo Park, New York, that attracted such brilliant and most visionary minds of the twentieth century - Albert Einstein, Werner Heisenberg, James Franck, Niels Bohr and Enrico Fermi to name a few. The Tuxedo Park lab attracted these top-flight scientists who experimented with audio, sound, time measurement, and radar (first klystron tube). Welcome to the ...
TUBEMUSEUM NEW YORK
offer 1 FOR A PAIR or offer 2 FOR A MATCHED QUAD!
SYLVANIA USA
labelled for BALDWIN*
*Same 6SN7 EXACT tubes as the Sylvania labelled 6SN7,but with BALDWIN labels! No difference what so ever! Still retains the Sylvania date codes, only the cosmetic logo is for Baldwin Organ Company, very quiet tubes made for tube organs like Baldwin,Hammond,Lowrey keyboard organs.
ACTUAL SONIC response:
+++++ VERY detailed packaging, SOUNDLY/SAFELY packaged. Wow. And the sound? As good as any Sylvania tubes I’ve used (and still own) from that era. Buy with confidence from this seller. - BEST CHOICE SYLVANIA USA 6SN7-GTB CHROME-TOP MATCHED PAIR BLACK-PLATE TUBES (#296888693725)
Made in USA in 1963
BOXES INCLUDED
SIXTY-ONE (61) YEAR-OLD TUBES!
CHROME-TOP6SN7-GTB
6SN7GTB = SAME as GTA, but with CONTROLLED tube heat-up
UNSOLD DECADES OLD TUBES!
NEW OLD STOCK
CHROME-TOP6SN7-GTB
BALANCED MATCHED PAIRS
The GTA is for the up-rated plate dissipation, and GTB adds a 10.5 second controlled heater warm-up characteristic which makes the GTB especially suited for amplifier receivers which employ series connected heaters. Don't believe everything you read on the internet! BOTH the GTA and GTB are Electrically and Physically the same with DC Plate Voltage of 450 VOLTS.
No apparentsonic differences!
LIMITED QUANTITY
LAST PAIRS! @ AVERAGE2,000/2,000! WOW!
SIXTY-ONE (61) YEAR OLD SYLVANIA 6SN7-GTB MATCHED PAIRS!
Dual Triode Perfect ELECTRICALMatched Pair
Sub-bass (10Hz - 60Hz)
CHECKED & PASSED
Mid-bass (80Hz - 200Hz)
CHECKED & PASSED
Midrange (200Hz - 3,000Hz)
CHECKED & PASSED
High-frequencies (3,000Hz on up)
CHECKED & PASSED
- "3-HOLE" BLACK V PLATES
- CHROME-TOP-SQUARE-GETTERS
- GUARANTEED MATCHING DATE-CODES!
- PRISTINE CLEAN TUBES
- FULL SILKSCREEN LETTERING
-TROPHY QUALITY 6SN7-GTB
6SN7GTB = SAME as GTA, but with CONTROLLED tube heat-up
SYLVANIA BLACK PLATE 6SN7GTB BALANCED TRIODE TUBES
SIXTY-ONE (61) YEAR OLD SYLVANIA 6SN7-GTMATCHED PAIRS!... with Black Plates and Beautiful Full ChromeTops pouring over the tops like chrome lava!6SN7GTB = SAME as GTA, but with CONTROLLED tube heat-up
Recommended for:
- Mikhail Rotenberg’s Singlepower Audio massive SDS XLR amplifier.
- Atma-Sphere P1
- Cary Audio SLP 05
- Grant Fidelity (Yaqin) B-283 mkII tube buffer
- Valvet Audio preamp
- Singlepower PPX3-SLAM
- Aesthetix Calypso
- CJ MV55
- Cary SLP-05 preamp
- Yaqin MS-34C
- Modwright Sony 5400ES
- Oppo/Modwright BDP-95
- VAC Renaissance 30/30 MKIII
- Bottlehead Crack
Schiit Magni:A recommended headphone amp
xDuoo MT-604:A recommended headphone amp
xDuoo TA-26S:A recommended headphone amp
Geshelli A3 Pro:A recommended headphone amp
- Eddie Current Balancing Act
- DarkVoice 336i/se
- RSA Stealth
- Singlepower MPX3
- Singlepower Supra
- Singlepower Maestro
- SinglePower Extreme
- Woo WA5 LE
- Woo WA5 300B
OLD WORLD MADE IN THE UNITED-STATES-OF-AMERICA AUDIO TUBES WITH EXCELLENT VACUUM AND TEST RESULTSMUSEUM-CERTIFIED AMPLITREX TESTED!MADE IN THE U.S. "BEST YEARS" OF TUBE MANUFACTURING!offer ONE (1) FOR A PAIR!offer TWO (2) FOR A QUADoffer FOUR (4) FOR A OCTET FOR YOUR CARY SLP-O5PRINT WILL VARY AS THIS IS A MULTIPLE LISTING - BOXES DIS[LAYED INCLUDED
Superior BLACK-PLATES with CHROME-TOPS designed for critical applications where 10,000 hour life, close triode section balance, rigid construction and stability are required.
Mikhail Rotenberg’s Singlepower Audio massive SDS XLR amplifier.
6SN7GTB = SAME as GTA, but with FASTER tube heat-up recommended for:
Cary Audio SLP 05Cary SLP 88- Cary 805M amps- Cary 300 SEI- Mastersound 845 monoblock 2008- Audio Note M2 preamp- Aesthetix
10,000 hour low noise Matching Platinum Pair for a 6SN7 CLASS PREAMP
3-HOLE BLACK-PLATESANDTEST MEASUREMENTS LISTED BELOW OF THE TUBES YOU WILL RECEIVE
BEAUTIFUL LIQUID-CHROME SONIC HOLOGRAPHY
…"Best described as having a euphonic sonic signature...
Pervasive tube warmth that blankets the midrange irrespective of the program material falls in this category, and has proven to be a siren call for many 6SN7-GT tube-o-philes.
Overly liquefying harmonic textures make these tubes a real keeper"…..
SIXTY-ONE (61) YEAR OLD SYLVANIA 6SN7-GTB MATCHED PAIRS!
Rarely do you see such a fine tube pair with THICK-MASSIVE-CHROME-TOPS and Perfect Specifications:
Pairs range in the 90% to 100% percentilerange.
offer ONE (1) FOR A PAIR!
..."Pure MAGIC. metamorphoses into a sonic-tapestry of pure sonics - ethereal listening to absolute music, as if the amp is not even there. too perfect for this world! prepare to leave your body."... - TubeMuseum Sonic response
Great USA tube now extinct - Made specifically for audio in the 1960's
3-HOLE BLACK-PLATESANDTEST MEASUREMENTS LISTED ABOVEOF THE TUBES YOU WILL RECEIVE!
Superior designed for critical industrial applications where 10,000 hour life, close triode section balance, rigid constructionand stability are required. 6SN7GT BLACK-PLATES were also labelled andsynonymous toVT-231
CHROME TOP getters and BLACK BASE "BLACK PLATES"
MATCHING DATE CODES!
PASSED THE AMPLITREX DIGITAL TESTS = NO HEATER-TO-CATHODE LEAKS!
Low-Noise Tested Microphonic Free
No H-to-K Leakage (Heater-to-Cathode) No leaks (0) zero!
Actual tube was tested on the State-of-the-Art AMPLITREX AT-1000 Electron Tube Test System
CERTIFIEDULTRA-LOW-NOISE MUSEUM SPECIMENS
TubeMuseum tested tubestakes the guesswork out of the process of selection delivering you the bestAudio tubes that there possibly can be.
Terms of sale
offer 1 FOR A PAIR or offer 2 FOR A MATCHED QUAD!
International Buyers - Please note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to offerding or buying.Item must be in original condition including cosmetic lettering on tubes so handle with white-glove care, un-used with all original tube museum boxes, packing material, environmentally safe cornstarch pellets, and shipping boxAll exchanges must be pre-paid and returned in original packing, complete with no sign of wear or abuse, exactly the same condition as it was when you received it. In the event that the product is not in the same condition, and does not test the same as you received it, you will be subject to a refusal and return, a determined restocking fee, repair charge, or disqualification. RETURN AUTHORIZATION (RA) number and instructions is required before sending any items. Shipping and handling charges are non-refundable.
We do not guarantee that your tester, or your tester's measurements will be the same as the Amplitrex AT-1000. Older testers, different testers, or the same tester may report different test measurements, and may not measure the same tube meaningfully (due to current dependency), accurately (due to calibration difficulties) or consistently (due to internal circuit drift) There is no warranty or returns based on what any other tube tester reports.
THE COST OF ALL USA SHIPPINGINCLUDESINSURANCE, TRACKING NUMBER AND DELIVERY CONFIRMATION
offer 1 FOR A PAIR!
offer 1 FOR A PAIR or offer 2 FOR A MATCHED QUAD!
Visit this seller's store!
TUBEMUSEUM NEW YORK
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