$120.0 Buy It Now or Best Offer
free,30-Day Returns

Seller Store tubemuseumusa
(6083) 100.0%,

Location: Bradenton, Florida
Ships to: US,
Item: 231335324005

Restocking Fee:10%
Return shipping will be paid by:Buyer
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money back or replacement (buyer’s choice)
RCA:RCA
Type:ECC83
Tube Type:7025
Characteristics:RCA controlled heater tube LN & non-microphonic
Product Type:VACUUM TUBE
Country of Manufacture:United States
MPN:12AX7A
Country/Region of Manufacture:United States
Grading:NOS LOW-NOISE

i collection(and my ears) cr Visit this seller’s eBay Store! TubeMuseumACTUAL SONIC-FEEDBACK FROM THESE SAME TUBES: VOTED #1 AMERICAN TUBE OF ALL 12AX7’S!TRANSFORM YOUR AMP INTO A SONIC DREAM MACHINE. What an incredible tube! I wasn’t expecting this kind of sweetness and musicality with all frequencies perfectly balanced. In the V1 position of a Swart AST it makes a previously perfect amp even better. I am even considering getting a few more as back-up. A truly excellent seller, thank you.NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE CREAM OF THE CROP HIGHEST EMISSIONS! (#231335324005)Buyer: surfin_yardbird (868)US $118.75 …”Mark, you weren’t sh%$$ing me about that RCA tube. Beautiful!! It beasted up my ART Pro MPAii bigtime. An EV Re20 into this thing sounds monstrous and totally “euphonic”. Thanks! – Jeff”… Fast shipping, holy grail style frickin valve. Thanks – Will be back.Buyer: jeffenjenn ( 314) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE CREAM OF THE CROP HIGHEST EMISSIONS! (#231335324005)US $129.95View ItemJust perfect! Thank you so much!Buyer: muscularmike99 ( 662) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005)US $129.97View ItemI am HappyBuyer: dewey_dew ( 66) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005)US $129.97View ItemFeedbackFromWhengreat packaging! Awesome, tube.Buyer: lukewarmpancake ( 27) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) 07/20/2016 Tube packaged very well, thanks a bunch!!!Buyer: lukewarmpancake ( 27) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) 07/20/2016 FeedbackFromWhenThe real deal RCAs, item as described…. thanksBuyer: surfnorthwest ( 486) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) FeedbackFromWhenAbove and Beyond, my expectations!! Great Communication, Fast Shipping, the bestBuyer: doctorwildcat ( 382) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) Thanks much. Buyer: ultralea ( 286) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) Great seller ~ Good communication ~ Nice productsBuyer: nakashima01 ( 205) March 31, 2016 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) Thank you!Buyer: poof3 ( 529) March 29, 2016 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) FeedbackFromWhenWould by from again. Awesome seller/ GREAT tube!Buyer: colsloon ( 182) During past month Mar 23,2016 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) FeedbackFromWhenPerfect! Great tubes. Quick shipping too….thanks!Buyer: zizala ( 337) During past month MAR 05,2016 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) FeedbackFromWhenThe product is perfect and works great.Buyer: kmag4355 ( 13) 01/01/2016 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) Perfect transaction and great tube thank you !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Buyer: paoloemilio2004 ( 52) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) Great seller quick delivery cool tubes thanks! Buyer: pgeraty ( 585) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) FeedbackFromWhensuperBuyer: kfrankarma ( 105) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) kfrankarma( 105)US $79.982Sep-27-15 02:16:17 PDTFrance FeedbackFromWhenGreat tube!Buyer: sonnyboy1969 ( 56) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) FeedbackFromWhenSmooth transaction. All good! Buyer: funky-drummer ( 225) Jan 28, 2015 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) FeedbackFromWhenEverything as promised and quick ship. Thank you.Buyer: mike7it9 ( 488) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) FeedbackFromWhenGood Seller! Fast shipping, packed well, thanks…Buyer: johnnygrego ( 203) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) FeedbackFromWhenExactly As Described. Super Fast Shipping With Excellent Packing!! Thank You.Buyer: jmvinn ( 616) During past month NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231335324005) Dear tubemuseumusa, Thanks for one Beautiful RCA 12AX7. Positive Feedback has been left for you and we hope for the same. Kindest Regards, JMVINN – jmvinn Great Ebayer. Thanks.Buyer: usatan1016 ( 422) May-31-14 20:09 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231204556163)US $129.97 ea. FeedbackFrom/priceDate/timeSmooth transaction!! Great product!!!! A+++++++Buyer: cdsweet22 ( 185) May-14-14 06:45 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231204556163)US $129.97 ea. Feedback From/price Date/time best 12ax7 ever made Buyer: littlczar ( 134) Jul-23-12 13:24 NOS RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ VOX MARSHALL Dr.Z (#290728035820) “…Dear TubeMuseumUSA, …”Just retubed my champ with tubes purchased from your store,fantastic,warmth,depth and harmonic complexity this amp did not have before(with 1975 production RCA’s),thanx for the quick/reasonable shipping to Canada,just added you to saved sellers list+entered 5 star feedback nice to find decent source those amazing N.O.S.tubes that my amp collection(and my ears) crave!”… rickl642 ( 115) …” excellent fast shipping Buyer: rich.sacher ( 280) Mar-24-12 23:49 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#290497360769) SquareTrade © AP6.0 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). Welcome to the … Visit this seller’s eBay Store! TubeMuseum First rate ebay store – I live in Australia – Ozzies buy with confidence here ! Buyer: Member id jedery57 ( 10) Jun-24-11 23:30 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#290497360769) Very Positive, fast shipper Member id guitaronly ( 3 ) Sep-13-10 10:16 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#230492987646) Excellent ebayer. Thank you Member id stingy41 ( 178) Sep-25-10 06:10 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#230492987646) Very Good item Member id loris3000 ( 320) Oct-13-10 02:33 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#230492987646) Top Seller, Swift Transaction, Quality Communication, Finest Tubes, Many Thanks Member id foxblanc ( 259) Oct-16-10 13:41 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#230492987646) Tube Museum is the best source of tubes on the net by far. A++++++ Buyer: Member id caafan ( 52) Jul-16-10 12:28 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#230492987646) Great tubes , fast shipping , recommended professional eBayer, ’til next time! Buyer: Member id bunnybob65 ( 204) Jul-23-10 06:35 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#230492987646) How many times have you purchased what you read advertised as a balanced and matched-triode tube on eBay and have received mismatched or marginal tubes? Well, get rid of those! Here is a AMPLITREX DIGITALLY TESTED QUALITY 12AX7A single tube 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. Bid one (1) for one (1) tube, or Bid two (2) for the matched pair! TUBE MUSEUM QUALITY”CREAM of the CROP”USUALLY THE RCA 12AX7A BEING CIRCULATED FOR SALE HAVE VERY LOW mA EMISSIONS.We see even NOS from the 1960’s selling for $100. each measuring only 0.4mA, 0.5mA, 0.6mA average!THESE MAGNIFICENT SPECIMENS TEST .8mA to 1.2mA (100%mA) and 1,500 to 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 CODE & Rectangle Micas Picture of one of the RCA “STOP-SIGN” 12AX7A rectangle plate “old-print” series with small sweet-halo for detailed sound! PRINT WILL VARY from partial to almost none, as this is a multiple item listing Fender Twin Reverb: The circuit used is commonly known as the AB763 circuit. Fender Twin Reverb amplifiers use four output tubes, of the 6L6GC type. They use six preamp tubes, consisting of four 7025/12AX7A types and two 12AT7 types. The 12AX7A/7025 is a lower-noise version of the 12AX7. 12AX7A/7025 RECOMMENDED BY FENDER IN THEIR ORIGINAL TUBE COMPLEMENT RECOMMENDED IN: – Fender Princeton Reverb – Fender Super 6 Reverb – Fender Twin Reverb AB763 – VOX AC15 – Fender ’64 Vibroverb – SUPRO AMPS – Conrad Johnson MV60SE – MARSHALL – DR.Z AMPS Fender “Twin-Reverb” 6L6GC x 4, 12AT7, 12AX7 (or 7025/12AX7A), 7025, 12AT7, 7025, 7025 Fender recommended the “7025 = 12AX7A” version in their 12ax7 preamp tubes GREAT FOR MUSICAL INSTRUMENT AMPLIFIERS THAT COME WITH 12AX7 TUBES! RCA labeled 7025 tube = LOW NOISE 12AX7A QUIET tube RCA labelled the SAME tube either 12AX7A or 7025, they are the same tube! 12AX7A/7025 Application Data Class Va Vg1 Ia Ra S Triode 100 -1 0.5 80,000 1.25 = 1,250 GM Triode 250 – 2 1.2 62,500 1.6 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) MOST RCA 12AX7A’S BEING SOLD ELSEWHERE HAVE A VERY LOW iP or mA emissionsDon’t take foolish chances with Other offers with weak 50% TO 70% EMISSIONS (mA) and only 900 to 1200 Gm, if lucky!Only BUY THE BEST Tube Museum Tubes … Take a LOOK at the ACTUAL AMPLITREX AT1000 “TUBE MUSEUM DIGITAL-PROOF” BELOW! PRINT WILL VARY from partial to almost none, as this is a multiple item listing 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.TubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that there possibly can be.Bid one (1) for one (1) tube, or Bid two (2) for the matched pair! ACTUAL SIDE 1 of TUBE # 1. SEE THE HIGH SPECS! 1.4mA (116%)! 1,800 Gm (112%)! THE “CREAM OF THE CROP”…with Zero (0) Heater-to-Cathode leakage, and ZERO (0) mA Gas! ONLY THE BEST! ACTUAL SIDE 2 of TUBE # 1. SEE THE HIGH SPECS! 1.2mA (100%)! 1,700 Gm (106%)! THE “CREAM OF THE CROP”…with Zero (0) Heater-to-Cathode leakage, and ZERO (0) mA Gas! ONLY THE BEST!TUBE 1: 1.4mA/1.2mA (116%/100%) and 1,800/1,700 mA/V (112%/106%) (SOLD!) (1.2mA = 100% and 1,600 mA/V = 100%) FeedbackFrom/priceDate/timeSmooth transaction!! Great product!!!! A+++++++Buyer: cdsweet22 ( 185) May-14-14 06:45 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231204556163)US $129.97 ACTUAL SIDE 1 of TUBE # 2. SEE THE HIGH SPECS! 1.4mA (116%)! 1,600 Gm (100%)! THE “CREAM OF THE CROP” …with Zero (0) Heater-to-Cathode leakage, and ZERO (0) mA Gas! ONLY THE BEST!ACTUAL SIDE 2 of TUBE # 2. SEE THE HIGH SPECS! 1.3mA (108%)! 1,600 Gm (100%)! THE “CREAM OF THE CROP” …with Zero (0) Heater-to-Cathode leakage, and ZERO (0) mA Gas! ONLY THE BEST!TUBE 2: 1.4mA/1.3mA (116%/108%) and 1,600/1,600 mA/V (100%/100%) (SOLD!) (1.2mA = 100% and 1,600 mA/V = 100%)ALL RCA “STOP-SIGN” 12AX7A rectangle plate “old-print” series 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!TUBE 3: 1,600/1,600 mA/V (SOLD!)TUBE 4: 1,600/1,500 mA/V (SOLD!)TUBE 5: 1,600/1,500 mA/V (SOLD!)TUBE 6: 1,600/1,500 mA/V (SOLD!)TUBE 7: 1,600/1,500 mA/V (SOLD!)TUBE 8: 1,500/1,500 mA/V (SOLD!)TUBE 9: 1,500/1,500 mA/V (SOLD!)TUBE 10: 1,500/1,500 mA/V (SOLD!)TUBE 11: 1,500/1,500 mA/V (SOLD!)TUBE 12: 1,500/1,500 mA/V (SOLD!)TUBE 13: 1,700/1,600 mA/V (SOLD!)TUBE 14: 1,600/1,600 mA/V (SOLD!)TUBE 15: 1,600/1,600 mA/V (SOLD!)TUBE 16: 1,600/1,600 mA/V (SOLD!)TUBE 17: 1,600/1,500 mA/V (SOLD!)TUBE 18: 1,600/1,500 mA/V (SOLD!)TUBE 19: 1,600/1,500 mA/V (SOLD!)TUBE 20: 1,600/1,500 mA/V (SOLD!)TUBE 21: 1,400/1,300 mA/V(SOLD!)62.5K/62.5K RPTUBE 22: 1,400/1,300 mA/V (SOLD!)TUBE 23: 1,400/1,300 mA/V (SOLD!)TUBE 24: 1,400/1,300 mA/V (SOLD!)TUBE 25: 1,400/1,300 mA/V (SOLD!)(NEWER RCA LOGO)TUBE 26: 1,500/1,400 mA/V (SOLD!) NEWER RCA LOGO)TUBE 27: 1,500/1,400 mA/V (SOLD!) (NEWER RCA LOGO)TUBE 28: 1,500/1,300 mA/V (SOLD!) (NEWER RCA LOGO)TUBE 29: 1,500/1,300 mA/V (SOLD!)(NEWER RCA LOGO)TUBE 30: 1,400/1,300 mA/V (SOLD!) (NEWER RCA LOGO)TUBE 31: 1,600/1,500 mA/V (SOLD global-p) (PRINT WORN OFF)TUBE 32: 1,500/1,400 mA/V(SOLD global-p) (NICE VISIBLE OLD RCA LOGO)TUBE 33: 1,400/1,300 mA/V (SOLD gsk) (PRINT WORN OFF)TUBE 34: 1,200/1,200 mA/V (SOLD! dizza) (PRINT PARTIAL / WORN OFF)AVAILABLE:JUST ADDED AUGUST 27: (NO BOXES – COMES IN WHITE BOX)TUBE 35: 1,400/1,400 mA/V (SOLD gsk) (PRINT PARTIAL / NEWER RCA LOGO)TUBE 36: 1,300/1,300 mA/V (SOLD ec) (PRINT PARTIAL / NEWER RCA LOGO)TUBE 37: 1,500/1,200 mA/V (SOLD ec) (PRINT PARTIAL / NEWER RCA LOGO)TUBE 38: 1,300/1,400 mA/V (SOLD pg) (PRINT PARTIAL / NEWER RCA LOGO)TUBE 39: 1,300/1,300 mA/V (SOLD pg) (PRINT PARTIAL / NEWER RCA LOGO)TUBE 40: 1,300/1,300 mA/V (SOLD pg) (PRINT PARTIAL / NEWER RCA LOGO)remaining tubes test similar to above … ———————————————————————————————————- TESTED AT REAL-WORLD POWER LEVELS ON AMPLITREX AT-1000 in Fixed-Bias Mode Tested on Amplitrex AT1000 Digital Tube Test System …” * Rp or plate resistance is the second most important parameter as it directly affects the output impedance of the preamp. Circuit designers are looking at Mu primarily, Rp next and we hardly care about Gm at all. Why then do most vendors measure Gm and Gm alone? Because most testers only measure Gm! No commercial tester ever measured Mu either (until the AMPLITREX AT1000 was introduced.) And even the Hickock, treasured for measuring Gm, doesn’t measure it meaningfully (due to current dependency), accurately (due to calibration difficulties) or consistently (due to internal circuit drift).'”… 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. Terms of SaleNo zero (0) status bidders without permission, or we reserve the right to cancel your bid.Bid one (1) for one (1) 12AX7A tube, or Bid two (2) for the matched pair!add just $3.99 more for Priority Mail in the USA! 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.All sales AFTER 14 days are final. 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. PayPal WELCOME! We use registered AIR mail, Professionally packaged and well secure for damage-free delivery. Certain countries PACIFIC RIM, CHINA, AUSTRALIA, THAILAND, INDONESIA, ITALY and others must use EXPRESS EMS or FEDEX for all orders over $50.USD. Please SEE my other ebay Auctions : Visit this seller’s eBay Store! TubeMuseum View seller’s other itemsGreat Ebayer. Thanks.Buyer: usatan1016 ( 422) May-31-14 20:09 NOS RCA 12AX7A 7025 ECC83 12AX7 USA TUBE “CREAM OF THE CROP” HIGHEST EMISSIONS! (#231204556163)US $129.97 ea. Tube Museum is the best source of tubes on the net by far. A++++++ Buyer: Member id caafan ( Feedback Score Of 52) Jul-16-10 12:28 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#230492987646) Great tubes , fast shipping , recommended professional eBayer, ’til next time! Buyer: Member id bunnybob65 ( Feedback Score Of 204) Jul-23-10 06:35 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#230492987646) First rate ebay store – I live in Australia – Ozzies buy with confidence here ! Buyer: Member id jedery57 ( Feedback Score Of 10) Jun-24-11 23:30 RCA 12AX7A ECC83 12AX7 USA TUBE for Fender Tweed Champ (#290497360769) Questions from other members : 12AX7 ECC83 12AX7A 7025 TUBE for Fender McIntosh Question & Answer Q: Hi, Could you please tell me the difference between the 12AX7 and the 7025 ? Thanks! A: 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. 7025 / 12AX7A is $149.95 and out-of-stock at many internet tube sellers. Dear TubeMuseumUSA, just retubed my champ with tubes purchased from your store,fantastic,warmth,depth and harmonic complexity this amp did not have before(with 1975 production RCA’s),thanx for the quick/reasonable shipping to Canada,just added you to saved sellers list+entered 5 star feedback nice to find decent source those amazing N.O.S.tubes that my amp collection(and my ears) crave . – rickl642

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