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NOS "BWB" 1959 SYLVANIA 6V6GT PAIR for MESA BOOGIE 1 Fender 5E3 Tweed Deluxe Princeton
NOS "BWB" 1959 SYLVANIA 6V6GT PAIR for MESA BOOGIE 1 Fender 5E3 Tweed Deluxe Princeton
NOS 1959 SYLVANIA 6V6GT PAIR for MESA BOOGIE 1 Fender 5E3 Tweed Deluxe Princeton


 
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Product Code: SYLVANIA-6V6GT
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NOS 1959 SYLVANIA 6V6GT PAIR

SYLVANIA CHS-JAN-6V6GT "BWB" GERMAN MILITARY BRAND

BID ONE (1) FOR A PLATE-MATCHED MATCHED PAIR!

Price is per PAIR, bid 1 for a PAIR, Bid 2 for QUAD!

FACT: You need to know if your amps power tubes are plate-matched (which this Amplitrex Digital Tested Pair is) because if they are mis-matched, your preamp tubes (like 5AR4,12AX7, 12au7, etc..) will be overly worked which will greatly shorten their life-span because they are forced to work-harder than they normally would.
..."These are Awesome! Rare SYLVANIA Plate-Matched Pairs of 1959 Black-Plate black-base, mirror-top mil-spec 6V6GT U.S.A..."

THE CONDITION IS LIKE AS IF YOU WENT BACK IN TIME OR OPENED A VACUUM TUBE "TIME-CAPSULE" FROM 1953, THAT'S OVER 50 YEARS AGO!

RECOMMENDED FOR AUDIO including fine audiophile amp
Zen Mini Torii SE Amplifier Decware
Bogner Duende and the Blue Angel uses a pair of 6V6s
Fender Princeton Reverb Reissue 2008
Fender Deluxe 57' / 65' Reissuse 2007
Deluxe 5A3, 5B3, (1948-1953 tweed) 5C3, 5D3 (1953-1955 tweed) 5E3 (1955-1961 tweed)
Deluxe 6G3, 6G3-A (1961-1963 brown), AA763, AB763 (1963-1967 blackface)
Deluxe Reverb AA763, AB763 (1960's blackface)
65' Deluxe Reverb (1963-1979 6V6 pair)
65' Deluxe Reverb II (1982-1985 6V6 pair)  
Fender Vibro-Champ 1960's
Champ II (1982-1983  6V6 pair)
Super Champ (1982-1986 6V6 pair)
Princeton (1961-1979 6V6 pair)
Fender Princeton Reverb (1964-1981 6V6 pair)
Fender Princeton Reverb II (1982-1986 6V6 pair)
Substitute in:

MESA BOOGIE Mark I Reissue, Mark IV, The Mesa Blue Angel & Lone Star

"... So anyways, has anybody tried 6V6 in a Lonestar? or LSS...?"

"...My LSC has done a lot of time with both 4x6V6 and 2x6V6 + 2xEL84 (using Yellow Jackets). The amp sounds absolutely great with both setups. Chimey, sweet and clear; lotsa fun.

The manual says to run the amp on the Tweed power setting while using 6V6s, but most modern 6V6s can handle the voltage decently; so running on full AC, if you need the extra oomph, is usually okay.  Recommended...."

These NOS 1959 6V6GT's are the little brother to the 6L6 and is all about classic American tube tone from yesteryear - Extremely sweet and bubbly with a beautifully deep bass and spacious shimmering highs, this tube defines vintage "Deluxe" styled tone and is a great substitute in the Mark I, Mark IV & Lone Star when used with their "Tweed" Switch feature - Please see the amplifier owner's manual for correct use of this tube
NOS Museum Quality

RARE 1959 SYLVANIA USA "BWB" MILITARY ISSUES

(Think about it!  That's 53 year old NOS testing at better-than NOS reference specifications!)

6V6 GT PLATE-MATCHED PAIR

Perfect Matched & Balanced Pair

THE MOST BEAUTIFUL PRISTINE 1953 NOS 6V6-GT PLATE-MATCHED BALANCED PAIRS IN THE WORLD

Very Rare Quiet Plate Matched Pair!
The older 1950's SYLVANIA 6V6-GT tubes were some of the finest Professional quality tubes designed primarily for use in audio stages and musical instrument amplifiers!  These tubes are designed to exhibit good headroom, can take a ton of plate voltage, and last. You won't find other NOS SYLVANIA 6V6-GT tubes tested to these precise Amplitrex Test Results around - that's because they are kept and treasured by those who know which the best 6V6-GT USA tubes are!

FEATURES:

BLACK-PLATE WITH MIRROR-TOP
Dual Square-Getters!
BLACK Base with BLACK-PLATES
PLATE-MATCHED TUBES PUT LESS STRESS ON YOUR OTHER 6X4, 5AR4, 12AX7, and 7025 TUBES - as mis-matched power tubes shorten the life of your other tubes!
MATCHING SYLVANIA CODES (1959)
BEAUTIFUL FULL-MIRROR TOPS = A HEALTHY PERFORMING TUBE
VINTAGE PAIR manufactured in the USA
ALL PAIRS HAVE IDENTICLE MATCHING SYLVANIA CODES (BWB)

Picture of Matched Pair with MATCHING SYLVANIA 1959 CODES -All tubes from same batch production above!

The black base CHS-JAN was used to indicate a tube manufactured FOR the military. These were heavy-duty mil-spec tubes  The plates and filaments on a black-base JAN tube will normally be larger and heavier than on comparable tubes made for the consumer market. It's a difference you can usually see if you look closely. Since they were all built to the same specs there shouldn't be much difference between black-base tubes made by one source or another. The higher quality of the black-base black-plate tubes is unlikely to make a difference you can hear, but it should make a big difference in how long it lasts as the larger plates dissipate more heat.




ACTUAL TEST RESULTS TESTED IN THE "FIXED BIAS MODE" WHICH IS MOST SIMILIAR TO THE OLDER TESTERS LIKE HICKOK & TRIPLETT

Picture of Matched Pair with MATCHING SYLVANIA CHS-JAN CODES

Whatever tone your gear produces, the mil-spec 6V6s give you more of it because they are better-built tubes; presence, sound-stage, depth. The strongest contrast is between modern 6V6s and mil-spec or '50s commerical 6V6s. To my ear, current make 6V6s including the very popular JJs are designed and built to sound more like 6L6s; a brighter, cleaner, less distorted / more articulate sound than the vintage versions. By contrast, mil-spec 6V6s are darker, more compressed, woodier, but I think this is also true of most NOS/vintage commerical 6V6s. The difference is that the mil-specs, because they are better-built, do the vintage thing better than commerical-grade 6V6s.
All Plate Matched Pairs test above 100% and identicle to pictures

Factory Specs are: 4,100 uMhos ( transconductance)= 100%    &   Factory Specs are: 45 mA = 100%

THESE TUBES ARE ONLY FOR THOSE WHO SIMPLY MUST HAVE THE BEST PLATE-MATCHED 6V6 PAIR FOR CRITICAL SONIC APPLICATION USE!

ACTUAL TEST RESULTS TESTED IN THE "FIXED BIAS MODE" WHICH IS MOST SIMILIAR TO THE OLDER TESTERS LIKE HICKOK & TRIPLETT

AVERAGE TEST RESULTS:

tube 1: 4,100 to 4,200 Gm (uMhos) & 48 to 52 mA = PERFECT WOW!

tube 2: 4,100 to 4,200 Gm (uMhos) & 48 to 52 mA = PERFECT WOW!


4,100 Gm = HICKOK TUBE TESTER RECOMMENDED MUTUAL CONDUCTANCE 45.0mA = specification sheet recommended 100%

TESTS BETTER THAN 100% of Hickok NOS recommended values
Tubes test exceptional with only a 40 second heater-run-time specification reaching 100% avg. Gm transconductance @4,100 uMhos

these are STRONG HEALTHY TUBES with HIGH emissions and phenominal TONE

sample Amplitrex Computer Specifications from one of the Matched Pairs:

CERTIFIED ULTRA-LOW-NOISE SPECIMENS


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