Top and bottom extension is spot on. I regard as gold standard in accuracy of itemsA+. ACTUAL SONIC-FEEDBACK FROM SIMILAR RCA 12AX7A TUBES. NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE "CREAM OF THE CROP" HIGHEST EMISSIONS! Subject: Other: jmvinn sent a message about NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE "CREAM OF THE CROP" HIGHEST EMISSIONS!
Dear tubemuseumusa, Thanks for one Beautiful RCA 12AX7. Tubes that my amp collection(and my ears) crave! RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ.
Historic Tube Museum, Tuxedo Park, New York Established in 1928 as a premier research facility in Tuxedo Park, New York, that attracted such brilliant and most visionary minds of the twentieth century - Albert Einstein, Werner Heisenberg, James Franck, Niels Bohr and Enrico Fermi to name a few. The Tuxedo Park lab attracted these top-flight scientists who experimented with audio, sound, time measurement, and radar (first klystron tube was invented here).
RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#290497360769). RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#230492987646). Tube Museum is the best source of tubes on the net by far.
Well, get rid of those! Here is a AMPLITREX DIGITALLY TESTED QUALITY 12AX7A s MATCHED PAIR that will end your search for the Quality you would expect from a Premium tube in your ultimate HI-FI AMPLIFIER or Musical Amplification system. USUALLY THE RCA 12AX7A BEING CIRCULATED FOR SALE HAVE VERY LOW mA EMISSIONS. + each measuring only 0.4mA, 0.5mA, 0.6mA average!THESE MAGNIFICENT SPECIMENS TEST 1.0mA to 1.1mA and 1,600 / 1,600 (up to 100% Gm)! 1960's NOS RCA Made in USA. 12AX7A = A LOW NOISE 7025.
Made in USA in the 1960's WITH STOP-SIGN. RCA labeled 7025 tube = LOW NOISE 12AX7A QUIET tube. RCA labelled the SAME tube either 12AX7A or 7025, they are the same tube! 1.25 = 1,250 GM. Although commonly known in Europe by its Mullard-Philips tube designation of ECC83 , other European variations also existed including the low-noise versions 12AX7A or 7025, 12AD7, 6681, and 7729; European versions B339, B759, CV492, CV4004, CV8156, CV8222, ECC803, ECC803S, E2164, and M8137; and the lower-gain low-noise versions 5751 and 6851, intended for avionics equipment.CERTIFIED ULTRA-LOW-NOISE SPECIMENS with the HIGHEST mA and Gm! TubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that there possibly can be. What I like about this tube is that it's a Matched & Balanced Triode Single-Tube with Uniquely closely Matched Plate-Resistance (Rp) & matched Tube-Gain (Mu).
Don't take foolish chances with Other offers with weak 50% TO 70% EMISSIONS (mA) and only 900 to 1200 Gm, if lucky! These tubes all have VERY HIGH iP/mA which is really important to insure a LONG-LIFE of your 12AX7A tube! Did you know that weak 12AX7 preamp tubes put an unnecessary strain and SHORTEN the LIFE of you other tubes in the circuit? If you want the "CREAM OF THE CROP" the BEST there can be, this is it. PAIR 1: 1,600/1,600 & 1,600/1,600 WOW!
All tubes test similar or even higher. (1.2mA = 100% and 1,600 mA/V = 100%).THE "CREAM OF THE CROP". With Zero (0) Heater-to-Cathode leakage, and ZERO (0) mA Gas! ALL TUBES have ZERO (0) Hearter to Cathode Leakage (H-to-K) & ZERO (O) mA Gas! TIGHT PLATE RESISTANCE and MATCHED TUBE GAIN ON BOTH SIDES! TESTED AT REAL-WORLD POWER LEVELS ON AMPLITREX AT-1000 in Fixed-Bias Mode. Tested on Amplitrex AT1000 Digital Tube Test System. This tube is known for excellent performance, smooth highs, outstanding 3-D holographic soundstage, lots of open-air, inner detail, and overall perfect resolution and balanced sound. Fantastic, warmth, depth and harmonic complexity and "old Fender Amp" tone when used in newer amps. All are Actual Pictures of these tubes. RETURN AUTHORIZATION (RA) number and instructions is required before sending any items.
We do not guarantee that your tester, or your tester's measurements will be the same as the Amplitrex AT-1000. We do not low declare and we insure for full value. Questions from other members : 12AX7 ECC83 12AX7A 7025 TUBE for Fender McIntosh. Hi, Could you please tell me the difference between the 12AX7 and the 7025? Fender specifies 7025 tubes in their later amps.I have seen tubes labeled both 12AX7A/7025 on the same tube. The 7025 and 12AX7A data sheets both say... For high-fidelity audio-amplifier applications critical as to noise and hum... The 12AX7 data sheet simply says "For use in mobile communications equipment" the 7025 was a special 12AX7A for instrumentation, having low microphonics and noise characteristics. The 12AX7A was an'improved' 12AX7.
Although commonly known in Europe by its Mullard-Philips tube designation of ECC83, other European variations also existed including the low-noise versions 12AX7A, 12AD7, 6681, 7025, and 7729; European versions B339, B759, CV492, CV4004, CV8156, CV8222, ECC803, ECC803S, E2164, and M8137; and the lower-gain low-noise versions 5751 and 6851, intended for avionics equipment. Tubes that my amp collection(and my ears) crave. The item "NOS RCA 12AX7A 7025 ECC83 12AX7 PAIR TUBES CREAM OF THE CROP HIGHEST ECHELON" is in sale since Monday, November 30, 2015. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets". The seller is "tubemuseumusa" and is located in Tuxedo Park, New York.
This item can be shipped worldwide.