TUNG-SOL CTL 6SN7 GT LEGENDARY BLACK BEAUTY NICELY MATCHED SET NIB NEAR MINT

Description

TUNG-SOL CTL 6SN7GT
LEGENDARY BLACK BEAUTY
DUAL BLACK TUBED PLATES
(
Inward Facing - Earliest 1950's Build
)
HORSESHOE TOPPED
CONVEX WINGED MICA
NICELY MATCHED SET
Extremely Rare -
N
IB - Near Mint
(
New
In
*
reproduction
Boxes
)
★★★
Amazing Historic Vintage Tubes
★★★
Production Year: 1950's
Platinum Label
Tall Black Base
Set of Two (2)
Made In the
U.
S.
A.
★
★★
These Tubes are
Very Rare
in
Like New
Condition
★★★
BEST TUBES ON THE MARKET...  NO SHORTS...  NO LEAKS...
Tested
New
on
Sencore TC 28 - Mighty Mite VII
and
Jackson Dynamic 648R
Sencore -
Where
70
μA
is
Good
these tubes peg right at
190 μA
on both Plates
-
NOS
Jackson -
Where
15
mA
at
70%
is
Good
these tubes peg right at
120%
on both Plates
-
120/125
-
NOS
Tube 1 - Plate 1.
18.000 mA
-  Plate 2.
18.000 mA
at Idle
Tube 2 - Plate 1.
18.750 mA
-  Plate 2.
18.750 mA
at Idle
Very
Nicely Balanced - Zero Drop in Tube Life Test
These run Super
Cool -
Rare and Exceptional - Holographic Tone
*
(One tube has lost it's label - The original box was eaten by a solvent and the label wiped away)
Power tubes are electrically matched so each tube will have the similar amount of idle, plate current and amplification characteristics when used in an amplifier!
This is done so the tubes can work together in your amp giving you optimal sound quality and tube longevity...
Matched tubes also receive extra quality checks to reduce the possibility of getting a faulty power tube that may have slipped by!
All of my Tube Inventory is
Boxed
and
Thoroughly
tested...
*
Test Ratings are Specific to
My Fully Calibrated Test Equipment!
The
Sencore TC28
has the
Most Sensitive Leakage Detection System
than any Tes
ter in it's class, and a
Very Accurate
method for testing
Tube Life...
The
Jackson Dynamic 648R
rivals the Hickok Dynamic Mutual Conductance Tester, and is the preferred choice of many world-class technicians and engineers!  Many hours are invested in proper testing in order to guarantee the best in
Quality
and
Performance...
Cheaper Is Not Better!
*
I place every 6SN7 Quad, Set or Single into my
YaQin MC-100B
Push-Pull Tube Amp...
Then I listen!
I use a
Sencore TC28
, a fully calibrated
Jackson Dynamic 648R
and my ears...  The tubes are put through a
Life Test
and each plate is warmed and measured for emission, leaks and shorts!  Each tube is thoroughly inspected, they are described accurately and listed based on fair value...  I am priced well under most sources and have a better quality selection!
My Return Policy
: 30 Days - Seller pays return shipping!  All tubes are Guaranteed to be as described...  You can buy with complete confidence!  Please read listing thoroughly and ask any questions prior to purchase...
Tube rolling will not be tolerated!  Any and All Returns must be in identical condition as when they were received...
Test Driving Vintage NOS Tubes is completely unacceptable and highly unethical!
Buyer will be charged for mishandled and damaged returns...
All tubes manufactured emit some type of sound, hum
or slight microphonic!  The level is
selective,
but
noisy tubes would always
be
described as such, auctioned or
Tossed...
I mark every tube in order to avoid tube rolling!
International Buyers Welcome!  I use eBay Global and USPS 1st Class International exclusively, unless otherwise stated...
I am unable to change declared value on customs forms, and International Buyers are responsible for all taxes, customs and additional fees!
Each tube is fully insured, boxed and shipped safely...
★
Expedited Shipping
★
★
Shipping times may vary based on region
★
★
*
Honesty,
*
Reliability and
*
Integrity are
*
Everything
★