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Bid one (1) for the PERFECT PAIR!

PERFECT. It's not a coincidence you came upon this listing ...these are destined for YOU. 

Made in Western Germany in 1960's

TELEFUNKEN ECC83 = 12AX7

SYMMETRIC BALANCED

MATCHING CODES  

DIGITALLY MATCHED PAIR

RIBBED LADDER PLATE TUBES


ACTUAL PICTURE OF MATCHED PAIR

REFERENCE-STANDARD ECC83 = 12AX7 - The HOLY-GRAIL of ALL 12AX7 / ECC83 class of tubes. 

AMPLITREX QUALITY TESTED

BALANCED MATCHED TRIODE 

MATCHED CODED PAIR

THE "HOLY-GRAIL" of the 12AX7 tubes

Made FIFTY-SEVEN (57) YEARS AGO in 1959-60



ALL ARE ACTUAL PICTURES OF THE 2 TUBES YOU WILL RECEIVE


1959-60 GRAY RIBBED PLATE "SWEET SMALL LOGO"


BALANCED & MATCHED ACROSS THE TRIODES AND PAIR NOS DIAMOND 12AX7/ECC83 - The HOLY-GRAIL of ALL 12AX7 ECC83 class of tubes. 

Made FIFTY-SEVEN (57) YEARS AGO in 1959-60



ACTUAL PICTURE OF THE TUBES YOU WILL RECEIVE



WITH DIAMOND < > & < > 


NOS MUSEUM CERTIFIED

AMPLITREX DIGITALLY TESTED


GENUINE TELEFUNKEN WEST GERMANY DIAMOND BOTTOM 12AX7 "CLASSIC" ORIGINAL 12AX7 = ECC83 


 TESTED IN THE "FIXED-BIAS" MODE most similar to Hickok settings

TESTS: 

1,600/1,500 GM & 1,400/1,300 GM

Fixed bias on the Amplitrex AT-1000 test results:


SYMMETRICALLY  BALANCED

FOR TRUE BALANCED 

STEREO SEPARATION!

This tube tests EVEN HIGHER on our Hickok 533 tube tester @ 1,600/1,600 /1,500/1,500 GM



Here is the Hickok 12AX7 = ECC83 recommended tube measurements for a NEW tube. 1,250/1,250 


TESTED IN THE "FIXED-BIAS" MODE most similar to Hickok settings


PASSED THE AMPLITREX DIGITAL TESTS = NO GAS and 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


CERTIFIED ULTRA-LOW-NOISE MUSEUM SPECIMENS

TubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that there possibly can be.   

Terms of Auction

Bid one (1) for the matched balanced pair!

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 bidding or buying. 

We do not low declare and we insure for full value.

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

ADD JUST $3.99 FOR USPS PRIORITY MAIL 2-DAY IN USA!

"EXPRESS SHIPPING" required for certain countries, (check first before you bid or we reserve the right to cancel your bid)

 Please SEE my other ebay Auctions :

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