12ax7 Ecc83 Difference



Here you have a simple exercise to test the wear of the valves:. Most tubes with ECC83 listed on the label are European, and the ones in demand are Telefunken, Amperex, Mullard, and Siemens. The tubes have well balanced triode pairs and a very even flat response. > ecc83s (12ax7) The JJ ECC83S is a High quality, low noise replacement for any 12AX7 type tube. A place where audiophiles and audio companies discuss existing and new audio products, music servers, music streamers and computer audio, digital to audio convertors (DACS), turntables, phono stages, cartridges, reel to reel, speakers, headphones, tube. Telefunken ECC83. What's the difference between the two?. And you might be lucky and like the cheapest tube best. For a comparison of all the 12AX7's we carry, click on the tech corner link at the top of this page. You can also use a 5751, but please note that the 5751 is a lower gain tube than a 12AX7 and the sound will be altered. Also, as tube manufacturing became refined, the 12AX7A became much quieter. The white print on the glass is labeled for other companies (Fisher, Dynaco, Silvertone, etc) and says "Made in Western Germany" (label may be partial). Of course, these are made in Russia and not England like the originals; but that seems to be about the only difference. MT tube preamp is designed on the base of the section of preamp of guitar amplifier SUNN Model-T of 19 73 on two ECC83 S (12ax7 EH) tubes. 1-12AT7/ECC81, 2-7025/ECC83, 2-6AW8, Power Amp. 99% of valve amplifier manufacturers use ECC83 (12AX7) as the first preamplifier valve so if it’s good enough for them …. These are so close to the originals we could hardly tell the difference in both appearance and sound. S) military/industrial definition of unspecified logical meaning (that I can find at least!). 12AX7 was the US designation for it's consumer grade version of this tube. Preamp Tubes - 12AX7 / ECC83 / CV4004 / 5751 Tube Basics and FAQ. Mullard 12ax7 (or 12ax7s) with most mid-range hump You can tell the difference visually as well and is self-explanatory. Q: How do I rewire the socket to use such tubes?. This is one HOT sounding Tube. 50METER,GALAXY TRUCKER GRUNDSPIEL Asmodee Neu+Top. They "hear" all sorts of differences with different tubes. For example a 12AX7 was available as 7025 (JAN/Military), ECC83 (England), CV4004 (France?), etc. The pre-amp tubes are ECC83 (apparently the British model number for 12AX7) branded as Zaerix. I think this is the best 'ECC83' you can buy on this planet! This tube is made by TESLA, on the original Telefunken machines, when they were still new, and materials and chemicals were identical at that time. RCA and Sylvania first introduced the 12AX7 to the world in the late 1940s. back Ip vs Vp : V PP (V) : RL (kΩ) Copyright © 2015-2019 Amp Books LLC. The transconductance on my sample was the same as two NOS samples I measured. The latest Russian re-issue is a perfect example. Comparatif des gain pour les lampes ded préamplification 12AX7, ECC83, 12AT7, 12AU7, 12AY7, et 5751. p = Pentode Unit. Long plate 12AX7s were the first tubes of this type ever produced. Vox used'em, and so did Matchless and Dr. *note: mostly they use selected quality of this tube (see RT001, RT010 or alternativly RT008 + RT080). They "hear" all sorts of differences with different tubes. les plus difficiles à trouver mais considérés comme des références sont allemands de la marque Valvo et hollandais de la marque Philips référencés "miniwatt" ou "SQ". The 12AX7 has the highest gain at 100, the 12AT7 is lightly lower and the 12AU7 is the lowest gain of the group. The first one is a Groove Tube and the second and third just say 12AX7 Made In Russia. They were new, and they cost less than the NOS Teles I had been listening to. Modern 12AX7 tubes are especially made for low noise high gain application, so any current production 12AX7 tubes can be used where 7025 is called for. and a New Sensor "Mullard" you'll see there's not really been an effort to duplicate the construction (never mind the cathode coating) of the original -- Mullard ECC83 (12AX7) Reissue vs Original - A Physical Comparison I don't think New Sensor itself characterizes the tubes as "reissues," though in some cases they say they're trying to match. com 12AX7 Telefunken smooth plate, COMMENTS : Brent- Wanted to let you know that the Telefunken 12AX7 Medical Grade I ordered last week arrived safe and sound, and oh, what a difference! The Ruby tube it replaced in my phono stage was clearly the weak link in my system. RCA and Sylvania first introduced the 12AX7 to the world in the late 1940's. They are cool tubes, and they have a different personality than the more common 12AX7 preamp stage. New Gain Matched Pair of Genalex Gold Lion 12AX7 / ECC83 / B759 Gold Pin Vacuum Tubes. Also my fave low gain tube a GE5814 is merely a Industrial designation 12au7/ecc82 but no 12au sounds like it. When that happens, the price goes up. My Favorite Tubes and Their Substitutes by Robert H. JJ ECC83S Tubes I wanted to create a quick and simple test to see how much of an audible difference replacing the tubes in my new Korg EMX-1 would make. 12AX7 is the U. H&G Amplification is an manufactory that designs and manufactures music amplifiers, speaker cabinets and boutique guitar effect pedals. The old, vintage tubes make simple, yet interesting decor. I was considering selling it but i thought i would try new tubes 1st. Mullard 12AX7 / ECC83 Reissue - This is a nice tube but in my opinion better suited to home audio than guitar amps. Radio tubes are valves. The JJ Electronic 12AX7 / ECC83 has quickly become a modern classic in preamp tubes. 12ax7 was really better choice. The 5963 is a computer valve that is similar to the ECC82. A starting guide to NOS vacuum tubes [Italian version] People sometimes ask me to recommend a particular vacuum tube for audio applications. As will become apparent in the US or the Russian 12AX7 tube 6N2P (6Н2П) signal, which is not quite the same, but rather similar; here it is already different from the heater connection. There is a discernable difference in tone between different manufacturer's versions of the SAME tube (EG a vintage Mullard ECC83 against a no-name Chinese 12ax7). the JJ Electronics ECC83-S 12AX7. Hi, I bought a couple of these cheap on ebay ZAEUX 12AX7 (ECC83. My favourites are still the Telefunken types and the large plate Philips and Siemens types from th. If you want tubes with a difference, use broadcast and industrial types such as the 7025 low hum and noise twin triode, a 12AX7/ECC83 in disguise. For the every growing search accompanied by escalating prices, finding good NOS 12AX7's gets tiring (and expensive). Those magic tones of the NOS ECC83/12AX7, (if you are a Russian oligarch). Gold Lion ECC83 / 12AX7 - Let's face it NOS 12AX7's are getting scarce. The 12AX7 is a 9-pin miniature, high-mu, twin triode. In specific to the SVT, one with 12AX7's will overdrive easier and won't have the same amount of clean volume. The Ruby 12AX7AC5 HG High Grade tube is the Shuguang 12AX7 9th gen tube, but distributed by Magic Parts. tie pins 4&5 together and run one filament wire to pin 9. These tubes are some of the best sounding tubes you can get. What a difference! I bought a used Zoom G9. The 12AX7 , 12AT7 , and 12AU7 all belong to the same family of nine contact, twin triode tubes. Read honest and unbiased product reviews from our users. Wow sounds killer really warmed the amp up yet kept the clarity. The ECC83 is a mid gain tube and will have less gain than a 12AX7 (ECC803S). The Telefunken ECC83 / 12AX7 was made with both Rib Plates and Smooth Plates. ECC83 and 12AX7 are identical. Any suggestions on where to try the other? I'm currently running: V1 = RFT 12AX7 V2 = Mullard ECC83 V3 = GE Longplate 12AX7 V4 = Mullard CV2024 V5 = RCA 12AX7A V6 = Sovtek 12AX7LPS. ) Equipment I used two amps, a Kalamazoo Model One and a Silvertone 1263. TC Tubes and Audio Repair Repair services include tube and solid state gear, turn table set-up, and tube-testing in Twin Cities Metro Area. These are available graded for High Gain and a lso available with current Balanced triodes for phase inverter use and Balanced and Matched in pairs or multiples. Out of stock and discontinued. Les meilleures offres pour Mm RIAA platines Ear834 Tube Phono Amplificateur Kit 12AX7/ECC83 Pour Audio sont sur eBay Comparez les prix et les spécificités des produits neufs et d'occasion Pleins d'articles en livraison gratuite!. I like it a lot. But if the designer says it will work in THIS application, you should assume it's OK to make the substitution. Forgive my ignorance, I thought 12AX7 and ECC83 are about the same. Selected and recommended for guitar amps to improve overall response. I prefer a post 1962 Mullard ECC83 in. Now the amp has punch. As someone else pointed out, probably the people at the bar won't notice the difference. The good news? The quality of current production 12AX7's is getting better and better. When you look at them you can't help but think that they must be rugged and good for the musician on the road. Achetée pour remplacer l'unique lampe de mon MARSHALL vs 100,j'ai pensé au début qu'elle fonctionnait mal car elle ne s'illumine que très peu,mais mes doutes se sont vite envolés lorsque j'ai commencé à jouer,car elle fonctionne,et plutot bien meme! La couleur du son est beaucoup plus sympa. From this point forward, I can't go back to the other $25. Edit: I'm pretty sure that the first number in the American system pertains to the heater voltage (6 volts versus 12, or 5 volts in the case of a 5AR4, etc), but apart from that, I'm stumped. This is the first report that I have put out to the public for a while. TESLA E83CC is identical to Telefunken ECC803S, with only difference, the TESLA has no gold pins. But I will tell you this, they make a huge difference in my Zen amp, really magical. in my tube manuals, I read what Aspen Pittman says about them in "The Tube Amp Book" I've checked other forums' backlogs as well as the previous pages in this thread and I can't seem to find a definative answer as to why the old Fender amps designate 12AX7's as well as 7025's. If I can get 80-85% there with another EL34 choice or ECC83 choice, I'm all ears. Even the standard types made in Heerlen (shown in the first two pictures on the left side and labelled Amperex, Valvo, Philips a. If you're playing clean, it doesn't make that much difference. On the other side of the iron curtain, the USSR came up with a completely different design for the ECC83/12AX7 that one thinks originated with the 6N2P. Today, it is by far the most common preamp tube used for electric guitar amplification and there is an almost overwhelming supply of current production options to choose from. This is a new out of the box Telefunken, with older Type black on white box. I bought these from Brent Jessee Audio Tubes in 2014 and used only two of them for a few months (light use). The JJ Electronic 12AX7 / ECC83 has quickly become a modern classic in preamp tubes. ECC803 was a type code given to high reliability ECC83. The 6Н2П is a miniature 9-pin dual triode vacuum tube manufactured in USSR and Russia with characteristics similar to the RCA 12AX7. The balanced tone of the JJ 12AX7 works well in any amp. One thought on " TJ Full Music 12ax7/ECC83 Box Plates Gold Pins " tubemaze on February 1, 2014 at 6:09 PM said: After trying Psvane 12ax7 tubes, I sound have learned and shouldn't have tried another Chinese tubes, but…. Here you have a simple exercise to test the wear of the valves:. The 12AX7 , 12AT7 , and 12AU7 all belong to the same family of nine contact, twin triode tubes. Enjoy the lowest prices and best selection of Preamp Tubes at Guitar Center. FOR GUITARISTS: My Reviews of 12AX7/ECC83 Tube Choices For Your Amp I realize this topic will have limited appeal to most of our members, so I placed it up here in the Public area, figuring that it would get wider exposure (maybe). Les meilleures offres pour Mm RIAA platines Ear834 Tube Phono Amplificateur Kit 12AX7/ECC83 Pour Audio sont sur eBay Comparez les prix et les spécificités des produits neufs et d'occasion Pleins d'articles en livraison gratuite!. Telefunken Ecc83- 12ax7 as new pairs excellent quality tested tubes The most musical sounding of all the vintage valves are telefunkens made in western germany in the 1960's. Even the standard types made in Heerlen (shown in the first two pictures on the left side and labelled Amperex, Valvo, Philips a. In fact it is a channel tube of our pedal “tube beta hybrid” in a separate box, but there is one difference. You may have to register before you can post: click the register link above to proceed. Looking for ECC83, 7025 Tubes? You can use any current production 12AX7 tube as 12AX7A, ECC83 or 7025. Vintage European and US 12AX7, ECC83, 5751, 7025, CV4004, CV492, and M8137 tubes in stock now, fully tested and guaranteed. A review of the JJ ECC803S vacuum tube This is the other 12AX7 tube made by JJ and it is very different both in sound quality and construction from the previously reviewed JJ ECC83 S tube, with its' frame-grid construction and compact, 6DJ8-style plate structure. Comparison of stock 12AX7 vs. q tubes 1959 matched nos pinched waist nos siemens halske cca = e88cc 6922 grey-shield holy grail 1959 single tube. It's just that an NOS 12AX7A tube is considered to be premium over the 12AX7. As some of you may know, the 5751 is similar to the very common 12AX7 aka 7025 and ECC83 but with a bit less gain. Found 200 records in Search of Tubes Asylum. Still today, the market for ECC83 is huge, with more than 2 million pieces sold yearly, mostly for guitar amplifiers, but also a good part for Hi Fi amplifiers and phono RIAAs made ever since the early 1950’s. They exhibit a large detailed soundstage that is sought after by discerning audiophiles who demand the highest quality sound. yeah, that's pretty great :) i built myself a 5watt 12ax7 pre with el84 and it's pretty loud, definetly can't practice at home at full volume but now a got a vox ac4 (that i modded a little) and it has some sort of power attenuator and it's ok. The most significant difference between the two is that 6N2P-EV has its two filament elements connected in parallel, unlike the series filament connection of the 12AX7, and it is thus only possible to operate it from a 6. The most common triode type found in guitar amps is the ECC83 / 12AX7, while the ECC81 / 12AT7, ECC82 / 12AU7 and 12AY7 occasionally make an appearance. Fake Telefunken 12ax7/ECC83 everywhere in reply to roglf Apr 7, 2009 11. Sound differences of preamp tubes in a Carvin Vintage 16 guitar amplifier in V1 position. The bias on the amplifier will need to be set specifically for 5881 or 6L6 valves. These tubes are some of the best sounding tubes you can get. Today, it is by far the most common preamp tube used for electric guitar amplification and there is an almost overwhelming supply of current production options to choose from. But if the designer says it will work in THIS application, you should assume it's OK to make the substitution. The smooth plate is one hell of a tube. This 12AX7/ECC83 is a new production copy of the famous Mullard 12AX7. Changing tubes in an amp can be a particularly challenging experience, especially since there seems to be such an abundance of them. After looking into what tubes to replace the stock 12AX7 tubes with, I decided on a pair of matched triode JJ ECC83S which I bought from Eurotubes. was the originally supplied tube to Fender in the 1950s if you want to be period-correct. The ecc83 is definately more durable and will serve you better in the long run. What's the difference between the two?. Of course, these are made in Russia and not England like the originals; but that seems to be about the only difference. MT tube preamp is designed on the base of the section of preamp of guitar amplifier SUNN Model-T of 19 73 on two ECC83 S (12ax7 EH) tubes. Which Telefunken 12ax7 I'd like to hear from members who are familiar with NOS Telefunken 12ax7s from the 1950&60s. It utilizes a medium length ribbed plate design that is much like the old Amperex and Brimar European designs. 5) Not sure if the British Tungsram made any ECC83 tubes. Radio tubes are valves. Re: 12aX7's vs. In this review, I’ve compared the new 5751 with the JJ ECC83S (12AX7) which has been my standard workhorse guitar preamp tube for several years. This is a new out of the box Telefunken, with older Type black on white box. Absolutely not. 12AX7: ECC83, ECC803S, E83CC, 7025, CV4004. This 12AX7/ECC83 is a new production copy of the famous Mullard 12AX7. 3V heater voltage and would need a different wiring than stock 12AX7's. 12ax7 ecc83 12AX7 is a miniature dual triode tube with high voltage gain. Preamp tubes are the tiny tubes that deserve the most attention. AmpTubes is an Australian based Vacuum Tube supplier dedicated to providing you the best quality products at the best prices possible, with fast shipping, great customer service and a smooth online shopping experience. Title: 12AX7 6AX7 Author: Sylvania Subject: JA-FP-2002-03-23 Created Date: 3/24/2002 12:54:30 AM. The JJ ECC83-S tube has several improvements in its construction from the old ECC83 version. Good to know: 12AX7 = ECC83 on the Euro market. What's Best Forum is THE forum for high end audio, product reviews, advice and sharing experiences on the best of everything else. This tube has a higher gain presence than most other 12AX7's. AVA has generally taken the view that tube rolling won't make much difference due to the circuit designs, but I doubt it will hurt anything either, My advice would be just leave the cover on and play some tunes. As for the 7025 versus the 12AX7, the 7025 is a ruggedized military grade low noise version of a 12AX7. The transconductance on my sample was the same as two NOS samples I measured. A 1kHz 600mVpp sinewave is injected into the amp input, the waveform and spectrum at the output is analyzed for several gain values (0, 0. Rod ~ World Tube Company Mullard The Mullard 12AX7 / ECC83 is a Very Smooth Sounding tube. The new Sovtek 12ax7LPS is supposed to be the modern equivalent of the 7025. The sound of this tube is full and musical. For tube buyers who have tried out some Telefunken 12ax7's & wondered why they didn't sound that good, probably because they are not real Telefunkens. Large sound stage with excellent detail. See our Best 12AX7 Review for more information. 2 Meg Ohm 12AX7 long plate and 12AX7A: Plate 1. 12AX7 Tubes in Stock - audiotubes. Also 12AX7, 6L13, B339, CV492, 12DT7, E2164 & E813CC. The smooth plate is one hell of a tube. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. These two sections are technically called triodes and are intended to have equal electrical performance characteristics. The difference these tubes make in my system is dramatic and literally breathtaking. The speakers play a huge role in the overall tone of your music, so having speaker can make all the difference. The tubes have well balanced triode pairs and a very even flat response. I wasn't seen born then. Tungsram ECC82 tubes are well liked by many Audiophiles. It's emblazoned with the iconic Electro-Harmonix Flashback logo in white on the left chest and back. This tube is labeled for either Fisher or Dynaco and says made in West Germany. Now I need to fill the ECC83 slot and decide on which EL34's to go with. Does anyone know about these ZAERIX 12AX7 (ECC83) Post by lespaulblues » Fri Aug 13, 2010 4:45 pm. The main event is the "Battle of 12AX7" which is something I have tried to organise for the last two months or so. TAD 12AX7A-C / ECC83 Premium Select Matched Pair (2) Very good gain, tight deep bass, fat mids and silky top end with overall definition and brightness. Neat - and only 9 pins. The Electro Harmonix 12AX7 is a standard tube that can be used for a variety of applications, but I use these for my guitar amplifier. "Genalex" Gold Lion 12AX7 / ECC83 Some of you have been asking if I could make some of my tube testing available again. Buy Voc Rock 12AX7 ELECTRO HARMONIX Premium tested Amp Valve Tube (European code ECC83). The GE (General Electric)1950s square or D-getter 12AY7 that have RCA logos - see item 290576593360 was the originally supplied tube to Fender in the 1950s if you want to be period-correct. Watford Valves - Test Reviews ECC83,12AX7 Test Reports 1998-2002 INTRODUCTION: OBJECT OF THE TEST To establish the best sounding ECC83/12AX7 of both New Old Stock and current production variety. Even the standard types made in Heerlen (shown in the first two pictures on the left side and labelled Amperex, Valvo, Philips a. Find helpful customer reviews and review ratings for JJ 12AX7 / ECC83 Preamp Vacuum Tubes (Three Pack) at Amazon. They were new, and they cost less than the NOS Teles I had been listening to. On the ECC83 (12AX7) valve they put the heaters in series and bring out the two ends and a centre tap. When the Hallo button is engaged and the Echo Repeat slide switch is in the "Fast" position, playback heads PB1, PB2, PB3 and PB4 are in use. AVA has generally taken the view that tube rolling won't make much difference due to the circuit designs, but I doubt it will hurt anything either, My advice would be just leave the cover on and play some tunes. For a comparison of all the 12AX7's we carry, click on the tech corner link at the top of this page. and a New Sensor "Mullard" you'll see there's not really been an effort to duplicate the construction (never mind the cathode coating) of the original -- Mullard ECC83 (12AX7) Reissue vs Original - A Physical Comparison I don't think New Sensor itself characterizes the tubes as "reissues," though in some cases they say they're trying to match. The most exclusive ECC83 12AX7 type is the Genalex Gold Lion ECC83. Differences in physical construction are reported to cause different tonal response (EG more/less middle frequencies). Or one of the cards I am using is not right? Edited:. This is trouble when the heaters are wired in series, for example Peavey amps sometimes, you’d better be sure the valves are similar enough that one doesn’t get all the power. Mike - My Roccaforte amp loves the RFT ECC83, so i am back for more. The AC30/6 was now an amp with three channels, each channel having two inputs. Usually lower cost and smaller than tubes, especially in small-signal circuits. NOS Brimar CV4004/ECC83/12AX7. My favourites are still the Telefunken types and the large plate Philips and Siemens types from th. It was released for public sale under the 12AX7 identifier on September 15, 1947. Low noise and very low microphonics makes this a great preamp tube for your amplifier. As soon as the music started I missed the sound of the NOS ECC83 (12AX7) Teles I had been using. tie pins 4&5 together and run one filament wire to pin 9. but telefunken was really my favourite. The short answer is yes in that you can swap a 7025 valve for an ECC83 and your amplifier will work fine. Compared to these NEW Cryo'ed Mullard 12AX7's they were a waste of money. This is one HOT sounding Tube. It is a gem, especially since I replaced one of the PS tubes with an NOS Mullard (6X4). New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more!. Il a été utilisé en public la première fois en 1963 à l’Ealing Club, près du magasin de Jim Marshall. You could buy one extra ecc83 to plat around with(try in various spots)though. It's designed to provide high gain output with an overall balanced tonal quality. The ECC83 is a high gain (μ approx 100) valve originally designed for quality audio applications and has an anode impedance of 62,000 Ω. It was developed around 1946 by RCA engineers in Camden, New Jersey, under developmental number A-4522. As mentioned above, you'll also find a huge variety of tubes to choose from as well. I tried the Mullard 12AX7 (CV4004) along with 5 other tubes in my Mesa Stiletto Ace, which is a 50 watt Marshall-style EL34 amp. 12AX7 Basics. By my count we have the Sovtek 5751, Sovtek 12AX7 LPS, Mullard and now the Gold Lion brand. So ecc83 as a designation can mean a variety of thingslong plate, shirt plate in the case if mullard also box plate. Passende Quad (4) Ge USA 12ax7 [Ecc83] Grau Lang Platte Fette D Bekomme, Reinigungsmittel Reinigung Vinyl Mofi One Cleaning Solution, Fitbit Inspire Health Fitness Armband Tracker, RICCARDO PIZZUTI signed Autogramm 20x27cm Foto InPerson Terence Hill BUD SPENCER, Franz von Pillersdorf (1786-1862): Eh. Tube Depot carries a selection of 12AX7 / ECC83 / 7025 / CV4004 Pre Amp Vacuum Tubes. The JJ ECC83-S tube has several improvements in its construction from the old ECC83 version. i hope i'll get some good saturated tones at bedroom levels. Single Tubes, Brand New, MINT NOS NIB FEB-1980 Tungsram ECC82 12AU7 Tubes with same batch code. I've spoken with three different tube vendors who are frequently recommended on this forum and received three different assessments of the ribbed vs smooth plate versions. Since 12ax7's and ECC83's are apparently drop in substitutes for one another (please correct me if i'm wrong though). The sound of this tube is full and musical. Realistic 12AX7/ECC83 (labeled "Long-life" and "USA") US made 12AX7A (labeled R. The 6SL7 type of valve has the same base as output valves such as the 6V6, 6L6, EL34 etc and were bulky, so the ECC8X family made a lower power, much smaller pre-amp valve. It was sold as a "lower noise" version of the 12ax7, but is identical in electrical characteristics. Title: 12AX7 Author: General Electric Subject: JA-FP-2001-01-20 Created Date: 1/20/2001 10:41:07 PM. Its rugged design and rich harmonics make this tube an obvious choice for musicians who need a reliable and high quality tube at a reasonable price. But if the designer says it will work in THIS application, you should assume it's OK to make the substitution. Following on from Matt Lachesky's article 'Mullard ECC83 (12AX7) Reissue vs Original - A Physical Comparison' in which he performed a dissection of a 'Reissue' New Sensor Mullard 12AX7 (American for ECC83) and an authentic Mullard Blackburn ECC83 tube, I decided to undertake some additional electrical performance measurements of these two tubes to supplement his findings. My conclusion: it pays off to buy a couple of 12AX7/ECC83-tubes and just listen which one sounds and behaves (in terms of noise, gain, punch) best. 12AX7 / ECC83 various labels by Philips and Amperex Holland, 1959-1962 Heerlen Holland code, large HALO getter: New Old Stock in white box, made in Holland. The 12AX7, also known as ECC83, is a vacuum tube that is a miniature dual triode - 6AV6 with high voltage gain. Use one tube for your repair and stow the other tube in your repair kit. There is a discernable difference in tone between different manufacturer's versions of the SAME tube (EG a vintage Mullard ECC83 against a no-name Chinese 12ax7). They are (almost) identical copy of genuine Telefunken's smooth plate ECC83 / 12AX7 from 60s. 1940-P WASHINGTON QUARTER - G GOOD,Connecticut state series 25k gold plated quatersset of 2 1998,1979-D 5C Jefferson Nickel-PCGS MS64--420-1. i hope i'll get some good saturated tones at bedroom levels. The 12AT7 also has a gain factor of 70, but since the plate resistance is different, the 5751 is closer to the 12AX7. What is a vacuum tube? What is a JAN tube? What is grid leakage? What are soft, hard, and medium rated tubes? What is the best 12AX7 for my amplifier? How do we match power tubes? What is the truth about tube testers? What is Amplifier Bias? When should I change the Tubes in my amplifier? What is the difference between Class A and Class. What is the difference between a 6L6 and a 5881? The 5881 is the same type of valve as the 6L6 but with slightly higher output. Another common name for the 12AX7 tube is ECC83 and for premium versions the 7025 and ECC803 audio tubes. The ECC83 is a high gain (μ approx 100) valve originally designed for quality audio applications and has an anode impedance of 62,000 Ω. That being said, the new production Tung-Sol 12AX7 are by far the best sounding of the currently produced tubes. Either way if applied to an old production valve it means it should be top quality. The first one is a Groove Tube and the second and third just say 12AX7 Made In Russia. 1: RE: 1980s Tungsram ECC83 Hungarian (13. Achetée pour remplacer l'unique lampe de mon MARSHALL vs 100,j'ai pensé au début qu'elle fonctionnait mal car elle ne s'illumine que très peu,mais mes doutes se sont vite envolés lorsque j'ai commencé à jouer,car elle fonctionne,et plutot bien meme! La couleur du son est beaucoup plus sympa. Many audiophiles and musicians prefer these to NOS Mullard 12AX7. The 12AX7 is a 9-pin miniature, high-mu, twin triode. 00 (and cheaper) tubes. The objective is simply to try to find out what is the best of the best 12AX7. The Tung-Sol name and trademark have been acquired by the New Sensor Corporation. 12ax7 12dt7 12ax7 6l13 12ax7 7025 12ax7 7025a 12ax7 b339 12ax7 b759 12ax7 e2164 12ax7 ecc83 12ax7a 12ax7 12ax7a m8137 12b-b14 13gb5 12ba6 12f31 12ba6 hf93 12bc32 12av6 12be6 12h31 12be6 hk90 12be7 uq80 12bq6gt 12g-b6 12br3 12af3 12br3 12r-k19 12by7 el180 12bz7 12ax7. My conclusion: it pays off to buy a couple of 12AX7/ECC83-tubes and just listen which one sounds and behaves (in terms of noise, gain, punch) best. By my count we have the Sovtek 5751, Sovtek 12AX7 LPS, Mullard and now the Gold Lion brand. Low noise and very low microphonics makes this a great preamp tube for your amplifier. This 12AX7/ECC83 is a new production copy of the famous Mullard 12AX7. I read in the reviews here at Harmony-Central that some Crate V16 and V-1512 users were using three different types of tube numbers in their first, second and third pre-amp sockets. Differences in physical construction are reported to cause different tonal response (EG more/less middle frequencies). This tube has a higher gain presence than most other 12AX7's. When you look at them you can't help but think that they must be rugged and good for the musician on the road. 12AX7 (also ECC83, 7025) Preamp Vacuum Tube. This 12AX7/ECC83 is a new production copy of the famous Mullard 12AX7. (PDF) ECC83 Datasheet download. This is the European part number and the American pert number is the 12AX7. Mullard ECC83 (12AX7) Reissue vs Original - A Physical Comparison Editors note. When the Hallo button is engaged and the Echo Repeat slide switch is in the "Fast" position, playback heads PB1, PB2, PB3 and PB4 are in use. As will become apparent in the US or the Russian 12AX7 tube 6N2P (6Н2П) signal, which is not quite the same, but rather similar; here it is already different from the heater connection. They are (almost) identical copy of genuine Telefunken's smooth plate ECC83 / 12AX7 from 60s. The 12AX7 , 12AT7 , and 12AU7 all belong to the same family of nine contact, twin triode tubes. Preamp Tubes - 12AX7 / ECC83 / CV4004 / 5751 Tube Basics and FAQ. Seller stated Telefunken 803s are not as good at $1K+ each. If you're playing clean, it doesn't make that much difference. Discussion about any amps, effects, or anything else to go along with your prized possessions. com FREE DELIVERY possible on eligible purchases. Hi all, Can anybody tell me anything about the difference between these two tube types in a preamp section of an amplifier? Usually (apparently, I´ve no idea really!) it is EEC 83 (12AX7) that is in the preamp section and I can find lots of reviews and comparisons about these types of tubes;. in my tube manuals, I read what Aspen Pittman says about them in "The Tube Amp Book" I've checked other forums' backlogs as well as the previous pages in this thread and I can't seem to find a definative answer as to why the old Fender amps designate 12AX7's as well as 7025's. Mullard 12ax7 (or 12ax7s) with most mid-range hump You can tell the difference visually as well and is self-explanatory. by bordonbert on Thu Aug 10, 2017 7:29 am Just came across this in my travels and was tickled by it. Probably it gives a little better balance. Mullard 12AX7/ECC83 I61 vs I63? If you put each of these in a tube tester and they read EXACT readings in terms of strength and output, what is the tone difference. Can be combined in the millions on one cheap die to make an integrated circuit, whereas tubes are limited to at most three functional units per glass bulb. a 12AU7) and ECC83 (a. Made on Philips Mullard equipment and identical to a mullard 12ax7, but pumped in India, these have the exceptional tone of a Mullard and accentuated mids without the hefty price tag. I prefer a post 1962 Mullard ECC83 in. You can find curve plots for 12AX7 Chinese, Sovtek, and Tesla on our Tube Data Page. Vintage European and US 12AX7, ECC83, 5751, 7025, CV4004, CV492, and M8137 tubes in stock now, fully tested and guaranteed. I felt as if I could reach out and stop a cymbal that I finally heard correctly in the center of the sound field. JJ Electronic ECC83MG - 12AX7 Factory Data Sheet: ECC83MG Our observations: Another 12AX7 variant from JJ. Thanks guys, great info. Check out: The tubes we list here also have several alternate names, which we list below. com 12AX7 Telefunken smooth plate, COMMENTS : Brent- Wanted to let you know that the Telefunken 12AX7 Medical Grade I ordered last week arrived safe and sound, and oh, what a difference! The Ruby tube it replaced in my phono stage was clearly the weak link in my system. For a comparison of all the 12AX7's we carry, click on the tech corner link at the top of this page. ECC83: This is the European version of the 12AX7, and is identical to it. See our Best 12AX7 Review for more information. Enjoy the lowest prices and best selection of Guitar Amplifier Heads at Guitar Center. Yes all 12AX7 firebottles can be plugged into a socket designed for 12AX7. RCA and Sylvania first introduced the 12AX7 to the world in the late 1940's. (NB one tube does both channels input stage) I left the other, driver, tube as a 6SL7, to ensure i was comparing apples to apples. The Telefunken ECC83 / 12AX7 was made with both Rib Plates and Smooth Plates. and a New Sensor "Mullard" you'll see there's not really been an effort to duplicate the construction (never mind the cathode coating) of the original -- Mullard ECC83 (12AX7) Reissue vs Original - A Physical Comparison I don't think New Sensor itself characterizes the tubes as "reissues," though in some cases they say they're trying to match. You can find curve plots for 12AX7 Chinese, Sovtek, and Tesla on our Tube Data Page. The valve has a frame grid construction which eliminates microphonics. Schiit Mani gives you the flexibility you need for both moving-magnet and moving-coil cartridges, together with exceptionally accurate, and low-noise performance. After looking into what tubes to replace the stock 12AX7 tubes with, I decided on a pair of matched triode JJ ECC83S which I bought from Eurotubes. As soon as the music started I missed the sound of the NOS ECC83 (12AX7) Teles I had been using. The ECC83 is a high gain (μ approx 100) valve originally designed for quality audio applications and has an anode impedance of 62,000 Ω. What a difference! I bought a used Zoom G9. This new production 12AX7 / ECC83 tube is New Sensor's reissue of the famous Mullard 12AX7. If I can get 80-85% there with another EL34 choice or ECC83 choice, I'm all ears. From this point forward, I can't go back to the other $25.