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SYLVANIA NOS JAN-CHS-6SN7GT VT-231 Low Noise Matched BLACK PLATE QUAD Tubes 1940 for Cary SLP 05
SYLVANIA NOS JAN-CHS-6SN7GT VT-231 Low Noise Matched BLACK PLATE Tubes 1940 for Cary SLP 05


 
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Product Code: SYL-JAN-VT231-QUAD
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Description
 
1940's LIKE OUT OF A TIME-CAPSULE! (N.O.S.) New Old Stock JAN-CHS-6SN7GT VT-231 Dual Triode Perfect Matched QUADS. Recommended for: Mikhail Rotenberg’s Singlepower Audio massive SDS XLR amplifier or Cary Audio SLP 05

Last "TROPHY" PERFECT MUSEUM QUADS or OCTET available!
"NEW OLD STOCK "USA SYLVANIA JAN-CHS-6SN7GT identical to VT-231 WWII BLACK-PLATE 2 STAPLE HOLE "FAMOUS VT-231" AUDIO TUBES only been labeled CHS for Sylvania, excellent lush
sounding, very rare blackplates from the 1940's USA, identical same tube construction and made for the United States Military in green labels.

Crystal clear tops with no-sign of use, no burn/use marks, copper posts, and beautiful
mirror properties.

These RIVAL the RCA 5692 redbase in sound and black-plate construction quality, and are as scarce. Beautiful Sylvania labels, NEVER USED THEY HAVE NO BURN-MARKS ON THE TOP - the construction of these to me look to be ENGINEERED VERY WELL WITH SOLID FIRM TIGHT BASES AND NEVER TO BE MADE AGAIN!.

IMPOSSIBLE TODAY to find these in PERFECT 3,000/3,000 +/- tubes from 1940's that were never used and testing perfect - SO DON'T SAY I DIDN'T TELL YOU WE JUST FOUND THEM IN LOST TUBE MUSEUM STOCK behind a wall of boxes!

These look like they came out of a "1940's WWII time-capsule" or the Bermuda -Triangle time-warp! WOW!

ACTUAL PICTURES AND TEST MEASUREMENTS OF THE TUBES YOU WILL RECEIVE

AMPLITREX AT-1000 DIGITALLY TESTED SYLVANIA 1940's JAN-CHS-6SN7-GT VT-231 MATCHED QUADS

SELECT ONE (1) FOR A QUAD or TWO (2) FOR THE OCTET! (8 TUBES)

New Old Stock 1940's SYLVANIA JAN-CHS-6SN7GT VT-231

Dual Triode Perfect Matched QUAD BLACK-PLATES

BOTTOM-SQUARE-GETTERS

SYLVANIA NOS BLACK PLATE JAN-CHS-6SN7GT VT-231 BALANCED MATCHED QUAD Perfect Matched QUADS

SEVENTY-FOUR (74) YEAR-OLD AUDIO TUBES WITH EXCELLENT VACUUM AND TEST RESULTS
Superior BLACK-PLATES designed for critical applications where 10,000 hour life, close triode section balance, rigid construction and stability are required.

RECOMMENDED FOR:

- Mikhail Rotenberg’s Singlepower Audio massive SDS XLR amplifier.
- Cary Audio SLP 05
- Cary SLP 88
- Cary 805M amps
- Cary 300 SEI
- Mastersound 845 monoblock 2008
- Audio Note M2 preamp
- Aesthetix

10,000 hour low noise Matching Platinum QUADS for a 6SN7 CLASS PREAMP

ACTUAL PICTURES AND TEST MEASUREMENTS OF THE TUBES YOU WILL RECEIVE

BEAUTIFUL LIQUID SONIC HOLOGRAPHY

Rarely do you see such a fine NOS tube pair with Perfect Specifications:

QUAD 1: (AVAILABLE - current pictures)
3,600/3,600 ( 138%/138%) AVAIL
3,600/3,400 ( 138%/130%) AVAIL
3,400/3,400 ( 130%/130%) AVAIL
3,400/3,200 ( 130%/128%) AVAIL

QUAD 2: (SOLD)
3,100/3,000 ( 120%/115%) AVAIL
3,000/3,000 ( 115%/115%) AVAIL
3,000/3,000 ( 115%/115%) AVAIL
3,000/3,000 ( 115%/115%) AVAIL

SELECT ONE (1) FOR A QUAD

ALL QUADS test a perfect 3,000+/3,000+ PLUS ( 115%/115% +) and all between 8.0+ mA to 10.0mA which is the HIGHEST we've ever seen!

9.0mA and 2.600 GM (2.60mA/V) = 100%

Great 1940's USA tube now extinct in NOS or NOS condition! Made specifically for audio in the 1940's.

Superior designed for critical industrial applications where 10,000 hour life, close triode section balance, rigid construction and stability are required. JAN-CHS-6SN7GT BLACK-PLATES VT-231

Bottom-square getters and BLACK BASE "BLACK PLATES"
1940's SYLVANIA BLACK PLATE 6SN7GT PERFECT BALANCED MATCHED QUADS
Superior BLACK-PLATE designed for critical industrial applications where 10,000 hour life, close triode section balance, rigid construction and stability are required.

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