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Positive feedback ratingAs described, quick shipmentBuyer: 
ericb-nc 348Teal star icon for feedback score in between 100 to 499 
During past month
 NOS PHILIPS 6U8 MATCHED PAIR with 7199 Tube convert to 6U8A Plug n'Play SOLUTION (#292118424795)

FeedbackFromWhen
Positive feedback ratingExcellent seller - fast and safe shipper - highly recommended!!Buyer: 
galvy1943 623Purple star icon for feedback score in between 500 to 999 
During past month
 NOS PHILIPS 6U8 MATCHED PAIR with 7199 Tube convert to 6U8A Plug n'Play SOLUTION (#292118424795)

ACTUAL SONIC-POSITIVE-FEEDBACK ABOUT PHILIPS JAN TUBES:

5.0 STARS

 product ratings



Period: 
 FeedbackFromWhen
Positive feedback ratingAbsolutely stunning in every way, sound incredible!!!Buyer: During past month
 NOS PHILIPS 6U8 MATCHED PAIR with 7199 Tube convert to 6U8A Plug n'Play SOLUTION (#292118424795)

FeedbackFromWhen
Positive feedback ratingfast delivery, accurate description.
  
During past month
 NOS PHILIPS BLUE ECG JAN USA 5814A 12AU7WA ECC82 AMPLITREX M-TRIODE SINGLE TUBE (#231539990215)

 FeedbackFromWhen
Positive feedback ratingFast shipment, very quiet/no noise tube. will buy it again!
 
During past month 4/20/16
 NOS PHILIPS BLUE ECG JAN USA 5814A 12AU7WA ECC82 AMPLITREX M-TRIODE SINGLE TUBE (#231539990215)

FeedbackFromWhen
Positive feedback ratingExcellent Service. Tube is fantastic. Just what the doctor ordered
 
During past month
 NOS PHILIPS BLUE ECG JAN USA 5814A 12AU7WA ECC82 AMPLITREX M-TRIODE SINGLE TUBE (#231539990215)

 FeedbackFromWhen
Positive feedback ratingExcellent seller
 
During past month
 NOS PHILIPS BLUE ECG JAN USA 5814A 12AU7WA ECC82 AMPLITREX M-TRIODE SINGLE TUBE (#231539990215)

Positive feedback ratingGreat ebayer! Super fast delivery,item as described. Thank you, Mesa Audio
 
During past month
 NOS PHILIPS SYLVANIA JAN 5814A (12AU7 ECC82) TUBES BALANCED MATCHED PAIRS IN BOX (#291356045382)



Positive feedback ratingGreat packing, thanks!
 
During past month
 NOS PHILIPS BLUE ECG JAN USA 5814A 12AU7WA ECC82 AMPLITREX M-TRIODE SINGLE TUBE (#231539990215)


TOP-SHELF VOICED-MATCHED TUBES for 7199 w/ our adaptor

Price is for a PAIR (2 TUBES)

Bid 1 for a PAIR!

(2) 6U8A Matched Tubes with(2)GOLD-PIN 7199 ADAPTERS

Tubes are VOICE-MATCHED to work together to produce full sounding, liquid, realistic sound-stage, with top sonic-performance

ADAPTOR Permits the use of the 6U8A or 6GH8A Tubes in place of the 7199 tube.

Top is 6U8, 6GH8, or ECF82.  Bottom is 7199. 

Your amp socket takes 7199, with our solution you can now use 6U8A or 6GH8A tubes, in place of the 7199.

This low profile high quality socket adapter re-arranges the pin connections to permit use of the 6U8A or 6GH8A tubes while retaining the original DYNA Circuitry. Includes ceramic socket, FRP circuit board and gold plated pins. Mounted height is less than 5/8" (0.625"). 

AUTHENTIC MADE IN U.S.A.

TubeMuseum's BEST

THESE ARE THE "CREAM OF THE CROP" with APPROX. 25% OUT OF 100 TUBES QUALIFYING for

OUR BEST MATCHED-TRIODE/PENTODE (MATCHED-TRIODE/PENTODE) BLUE PRINT PREMIUM TESTING 6U8-A = ECF82. 

ATTENTION TO DETAIL IS GIVEN TO EVERY TUBE WITH AMPLITREX AT1000 TESTING & TUBE-MUSEUM CERTIFICATION with COMPREHENSIVE SPECIFICATIONS AND LOW-NOISE SCREENING.  

Price is for a PAIR (2 TUBES) and 2 Socket-Adaptors

Top is 6U8, 6GH8, or ECF82.  Bottom is 7199. 

THESE ARE THE "CREAM OF THE CROP" with APPROX. 25% OUT OF 100 TUBES QUALIFYING

JAN ~ PHILIPS ECG ~ USA

INDUSTRIAL AVIATION AEROSPACE

BLUE PRINT 

NOS 6U8-A = ECF82


OPENED FRESH FROM A SEALED DECADES OLD MASTER-CASE OF 100 TUBES from THE UNITED STATES DEFENSE DEPARTMENT DEPOT, OGDEN, UTAH.


Price is for a pair and 2 GOLD-PIN Socket-Adaptors!


Bid 1 for a PAIR = 2 matched tubes + 2 Adaptors!

Actual picures of tubes ~ all the same looking - comes in ORIGINAL boxes

Test results will vary from picture as this is a multiple listing

Sample testing of tubes - All tubes test excellent & matched

Tubes Tested on Amplitrex AT1000 Digital Tube Test System


Test results will vary from picture as this is a multiple listing

Sample testing of tubes - All tubes test excellent & matched

Price is each PAIR!

Great Sounding American workhorse tube, the 6U8-A reproduces sound with accurate tonality and one of the lowest-noise ECF82 variants . Superb affordable choice for hifi preamps and Guitar Amps.  The 6U8"A" is a Low-Noise rated long-life tube made to last a lifetime.


Philips used color print and design for the special features as follows: 

Green label: Originally Designed for computers, however, audiophiles have found this tube to be a suitable replacement for the 6U8. Designed for long heater hours, durability, high tolerance curve points, special cathode construction.


Blue label: Aviation/aerospace. Special switching filaments. Used in missiles as an on-off switch, Industrial tubes designed for long heater hours, durability, high tolerance, shock and vibration resistance, special cathode construction, and low-noise and balanced triodes. Blue label is Perfect for AUDIO. 

Nonetheless, all tube specifications change over time or don't change from the original factory testing, whether for Military, Industrial, or commercial, and they have to be re-tested now and today! That's why proper tube testing is necessary for any tube, regardless of what a color-code, or class of tube designates. Heater-to-Cathode leaks in a tube render it useless and too many of these undesirables are in circulation on the internet and sold by other sellers unbeknownst to them or perhaps they know and don't care. At the Tube Museum We care, Tube Museum tubes takes the guesswork out of the process of audio tube selection, providing the best possible audio tubes available.



Actual Pictures of these tubes - All tubes test over/at 100%


CERTIFIED LOW-NOISE TESTED


 Terms of Auction

Per eBay's terms of service which every eBay account holder must agree to as part of being an eBay member, a bid is a legally binding contract. Please read the Terms & Conditions carefully before bidding. By bidding on this auction, you understand and agree to eBay's terms of service as well as all terms and conditions mentioned here.

Buyer pays all shipping, Item must be in original condition including cosmetic lettering on tubes so handle with white-glove care, un-used with all original boxes, packing material, environmentally safe cornstarch pellets, and shipping box. ALL RETURNS subject to a 10% handling charge. Absolutely NO RETURNS on special orders or best-offer deals. All sales are final with NO RETURNS on self installed mic tubes.

All 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 SHIPPING INCLUDES INSURANCE, TRACKING NUMBER AND DELIVERY CONFIRMATION

International Buyers: We do not lower the value. 



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