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NOS SYLVANIA USA JAN 12AX7 7025 12AX7A ECC803S NOS DIGITAL BALANCED PERFECT PAIR
NOS GE USA JAN 12AX7 MILITARY 12AX7WA ECC803S NOS DIGITAL BALANCED PERFECT PAIR
NOS SYLVANIA USA 12AX7A 7025 ECC803S NOS DIGITAL BALANCED PERFECT PAIR
 
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NOS SYLVANIA USA JAN 12AX7 12AX7A ECC803S NOS DIGITAL BALANCED PAIR

CREAM OF THE CROP STRONGEST SUPER-TUBES HIGHEST EMISSIONS - GREAT MATCHED PAIRS!

How many times have you purchased what you read advertised as a balanced and matched-triode tube off the internet and have received mismatched or marginal tubes? Well, get rid of those! Here are the HIGHEST QUALITY AMPLITREX DIGITALLY TESTED NOS (NEW OLD STOCK) NIB (NEW IN BOX) SYLVANIA 12AX7A = 7025 tubes that were made in the 1950's - 1960's that will end your search for the Top Quality you would expect from a Premium tube in your ultimate HI-FI AMPLIFIER or Musical Amplification system.

NOS NIB TUBE MUSEUM QUALITY NOS USA MADE 12AX7

12AX7A = 7025 = E83CC = ECC803S LOW-NOISE TUBES

These tubes actually have THICK mica spacer insulators! (2 sandwiched mica insulators) but we will call these 2-mica or double mica tubes - this doubling up of the top mica adds to the 12AX7-WA "ruggedized" construction classification of J.A.N. MILITARY SPEC tubes capable of being held in 3 different positions in a Navy type (flyweight) Shock Machine and are subject to 600 g impact acceleration & 2.5 g vibrational acceleration at 25 cycles for 32 hours in Factory testing and burn-in.

Gray-Plate Top Double-Mica

Made in USA WITH SYLVANIA  CODES. See the glass acid codes of 12AX7A = 7025 U.S.A.  The A = LOW-NOISE CLASS of tube.

Special ruggedized tube.  

SIMPLY the PERFECT SINGLE REFERENCE 12AX7A = 7025 AMPLITREX TESTED TUBES BY WHICH ALL OTHER 12AX7's CAN BE MEASURED BY!  

VERY QUIET tube

Comes in their (OVP) ORIGINAL VENDOR PACKAGING as shown

CERTIFIED ULTRA-LOW-NOISE SPECIMENS

All tubes measure VERY STRONG Tested on the Amplitrex in the "fixed-bias" setting which is the most accurate bias setting. What I like about these tubes is that they are all Matched & Balanced in Mutual Conductance with Uniquely Matched Plate-Resistance (Rp)& matched Tube-Gain (Mu)

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

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