12ax7 Ecc83 Difference

12ax7 Ecc83 Difference

December Learn how and when to remove this template message. I have a couple British made 5AR4's as well as a nice Mullard GZ34 already that I got great deals on. As soon as the music started I missed the sound of the NOS ECC83 (12AX7) Teles I had been using. What difference is there in tone between the ECC83 and the 12AX7 versions? Is one version superior or the more highly sought after version of the amp (silver or black) ? Lastly I can't seem to find any information on this amp in the Legacy Products section of the Randall site, why is it missing from the database?. 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. Power, preamp and rectifier tubes can all be found, as solo tubes or occasionally in packs, so you can always have a spare on hand too. ECC83/12AX7 Test Reports 1998-2002; Specials. The sound of this tube is full and musical. I like it a lot. The most popular of this family is the ECC83. a 12AU7) and ECC83 (a. Most tubes with ECC83 listed on the label are European, and the ones in demand are Telefunken, Amperex, Mullard, and Siemens. Modern tube manufacturers have resurrected ECC803 type code for different/premium versions of 12AX7. So they dont drive so hard as a 83 at the same gain. >I have a circuit currently using ECC83 tubes, but the designer says that a >12BH7 would give lower distortion. 12AX7: ECC83, ECC803S, E83CC, 7025, CV4004. The TESLA (NOT JJ) E83CC frame grid tubes are the BEST you can buy, when you do not want to spend. 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. Yes all 12AX7 firebottles can be plugged into a socket designed for 12AX7. It was released for public sale under the 12AX7 identifier on September 15, 1947. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. Difference between ECC83 (12AX7) and ECC82 (12AU7) I'd like to know what the difference between those tubes are and if I can use the ECC82 instead, in an amp that I. ECC83 is the European name for the 12AX7. 5) Not sure if the British Tungsram made any ECC83 tubes. This interacts with the *designed* tonal response of your amplifier,. 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. 5AR4 / GZ34. New Genalex Gold Lion 12AX7 / ECC83 / B759 Gold Pin Vacuum Tube. These are all pin compatable with one another, the only differences being the gain factor of each tube. The Ultimate 12AX7. Discussion about any amps, effects, or anything else to go along with your prized possessions. The main event is the "Battle of 12AX7" which is something I have tried to organise for the last two months or so. The main differences with this family of tubes are as follows: 12AX7: the original version of this tube. 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 I will tell you this, they make a huge difference in my Zen amp, really magical. Very well stored & protected stock! It doesn't get any more NOS than this!!! Thank you very much for your excellent testing, labeling, packaging & prompt shipment. Echo Repeat (Rapid - Slow) Slide Switch - Works in conjunction with the "Hallo" front panel button. They are cool tubes, and they have a different personality than the more common 12AX7 preamp stage. ECC83 vs 12Ax7 Tubes - What is the Difference? One of the more confusing things about tube amps is changing them, especially when there seem to be so many different kinds available. Mesa/Boogie MESA 12AX7 Preamplifier Tube Features: Premium-grade, high-gain preamplifier tube. It has made a big difference. 12AX7 tube is the most common preamp tube today. Since antique tubes, such as the Svetlana 12AX7/ECC83, make a difference in the sound of your amp, it makes sense to make sure the tube is the problem before you repair it. Editors note. com FREE DELIVERY possible on eligible purchases. Vox soon tired of the problem so to cure AC30/4 reliability issues caused by the troublesome EF86 preamp tube, in late 1960 Vox redesigned the preamp circuit, replaced the EF86 with an ECC83 (12AX7), and released this new design as the AC30/6. The TESLA (NOT JJ) E83CC frame grid tubes are the BEST you can buy, when you do not want to spend. They are hard to find and when they are available, they are expensive. 12AX7 / ECC83 / CV4004 / CV492. Most tubes with ECC83 listed on the label are European, and the ones in demand are Telefunken, Amperex, Mullard, and Siemens. So here comes this tube out of the box, and I put it on the Amplitrex AT1000. Schiit Mani gives you the flexibility you need for both moving-magnet and moving-coil cartridges, together with exceptionally accurate, and low-noise performance. Seller stated Telefunken 803s are not as good at $1K+ each. single Mullard Bausch & Lomb 12AX7/ECC83 10 series tube. - So here's the end result - I kept the TAD-STR ECC83 in V1, and placed a Tung-Sol 12ax7 in V2. 12AX7: ECC83, ECC803S, E83CC, 7025, CV4004. The speakers play a huge role in the overall tone of your music, so having speaker can make all the difference. The sound of this tube is full and musical. Hi, I bought a couple of these cheap on ebay ZAEUX 12AX7 (ECC83. But I will tell you this, they make a huge difference in my Zen amp, really magical. Check out: The tubes we list here also have several alternate names, which we list below. 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 US = ECC83 European. (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. Ozone 8 was released two years ago and since then, we’ve seen some excellent updates to Nectar and Neutron, so it’s (let’s be honest) unsurp. with 12AX7 card, it reads 81% And I know the tube that I am testing is a pretty strong one. American VS. ECC83 Telefunken 12AX7 Types My regular job does not have any connections with vacuum tubes, except for the music endlessly playing on my tube amplifiers. The ECC83 MG is a "Mid Gain" 12AX7 type tube. Compared to a Tung Sol it sounds a bit flat, but so does a NOS Mullard. I run 5751s in my 12AX7 slot and can hardly discern less volume. with ECC83 card, it reads 49% 2. Single Tubes, Brand New, MINT NOS NIB FEB-1980 Tungsram ECC82 12AU7 Tubes with same batch code. So the bottom line is that you can use either of these tubes in your Marshall amp. The Ruby 12AX7AC5 HG High Grade tube is the Shuguang 12AX7 9th gen tube, but distributed by Magic Parts. We both reckon Beijing 6n4 and Beijing 6n2-q(12au7) sounds better than gold lion ecc83. The TESLA (NOT JJ) E83CC frame grid tubes are the BEST you can buy, when you do not want to spend. so the mod shouldn't be too difficult to go to a 12A*7 type. The 12AX7 can be run as either 6v or 12v heaters. 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. But if the designer says it will work in THIS application, you should assume it's OK to make the substitution. So much in fact that a lot of 12AX7A's were labeled 7025's (a very quiet version of the 12AX7). The AC30/6 was now an amp with three channels, each channel having two inputs. ECC83/ 12AX7A-TUNG SOL RU GOLD PIN Tung-Sol Russia The Tung-Sol ECC83 12AX7 ECC803s Gold pin is made in Russia and is a factory selected gold plated pins version of the In stock £19. 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. Probably it gives a little better balance. But I will tell you this, they make a huge difference in my Zen amp, really magical. These Electro-Harmonix 12AX7 are not relabelled Sovtek 12AX7-LPS tubes. Get a low price and free shipping on thousands of items. These are rough estimates as each tube will have its own electrical characteristics and just swapping one (new) 12AX7 for another (new) 12AX7 could result in slight higher or lower gain from the circuit. a 12AU7) and ECC83 (a. 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. When I changed the factory JJ 12AX7's in my Marshall DSL40C for the German made TAD 7025-WA Highgrade Selects, the difference was so amazing, my wife, who really doesn't care to know anything about music, commented on how much different the amp sounded. Most tubes with ECC83 listed on the label are European, and the ones in demand are Telefunken, Amperex, Mullard, and Siemens. The most popular of this family is the ECC83. 5) Not sure if the British Tungsram made any ECC83 tubes. The ECC83 high impedance amplifier triode was designed specifically for audio use and has a high amplification factor of 100. (PDF) ECC83 Datasheet download. Distortion analysis. They looked great. We have the ECC81 ECC82 ECC83 was introduced specifically for audio applications way back in 1954 to replace the earlier 6SL7 octal based valves. 7025 was the designation used for a heavy duty version of the 12AX7. - So here's the end result - I kept the TAD-STR ECC83 in V1, and placed a Tung-Sol 12ax7 in V2. The difference is 0. The Mullard is a high-gain tube, and sounded exactly the same as the Electro-Harmonix 12AX7EH and Sovtek 12AX7WA - too brittle and fizzy to produce soft clip "crunch" at moderate gain levels. a 12AU7) and ECC83 (a. So none of them will work in the new TABOO. 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. The latest Russian re-issue is a perfect example. 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. Especially the ones that say Mullard, Telefunken, Amperex, EI or RFT on them. They are interchangeable, though the 5751 has a gain rating that's less than the 12AX7. Marshall JCM 900 Series 2500 50 watt Classic EL34 Retro full upgrade kit 10% Discount The Marshall JCM 900 Series 2500. This is one HOT sounding Tube. 12AX7 / ECC83 / CV4004 / CV492. Hi, comparison of the 12A?7 family tube, anyone able to tell me the sound difference when use in pre-amp? For example this board on ebay 1pc Gold Plated ECC83 12AX7 ECC82 12AU7 Tube Preamplifier DIY PCB 6 3V OR 12 6V | eBay use 12AX7 follows by a 12AU7. If money is at all a concern that will outwiegh the difference in tone. As for the 7025 versus the 12AX7, the 7025 is a ruggedized military grade low noise version of a 12AX7. Big, full, rich sound. Differences between 12AX7, 12AX7A, 12AX7WA etc?. Comparisons. Preamp tubes are the tiny tubes that deserve the most attention. Mullard 5AR4, Mullard EL34, TFK ECC83 long smooth plate all added together gets very pricey. Find helpful customer reviews and review ratings for JJ 12AX7 / ECC83 Preamp Vacuum Tubes (Three Pack) at Amazon. So they dont drive so hard as a 83 at the same gain. E83CC is an old term for a special high quality ECC83 (=12AX7). The gain, when cranked, used to be very harsh, as you may recall from my comparison videos. It was sold as a "lower noise" version of the 12ax7, but is identical in electrical characteristics. Get a low price and free shipping on thousands of items. Either the Tianjin ECC83 or any of the China 7025 tubes is preferable to the Psvane… and the Tube Store "Preferred Series 7025" is a GREAT tube for only $25; I prefer it by far to the modern New Sensor Mullard re-issue 12AX7 by a huge margin and even favor it over the expensive Gold Lion 12AX7 reissue tubes in certain applications. The India made BEL 12AX7 is by far the best value in 12AX7 tubes. 7025 was the designation used for a heavy duty version of the 12AX7. "Genalex" Gold Lion 12AX7 / ECC83 Some of you have been asking if I could make some of my tube testing available again. the factory item "12AX7B" is Shuguang's better selection item versus their "12AX7" or "12AX7A". High Gain, ultra-low microphonics, and superb linearity with a dynamic 3-D sound. The Tung-Sol name and trademark have been acquired by the New Sensor Corporation. If you notice a loss in bass and power, it is very likely that your power tubes (also known as outlet valves) need to be replaced. ECC83 was the European designation for the 12AX7 -- the tubes were functionally identical. So ecc83 as a designation can mean a variety of thingslong plate, shirt plate in the case if mullard also box plate. Find helpful customer reviews and review ratings for JJ 12AX7 / ECC83 Preamp Vacuum Tubes (Three Pack) at Amazon. One day, in the middle of work time, a colleague entered my office to ask something and from the corner of my eye I glimpsed a man who was staring like hypnotized into an amplifier. Good to know: 12AX7 = ECC83 on the Euro market. the other difference between the two tubes is that the ecc85/6aq8 has less gain. My favourite high gain amp 12AX7's are the late 80's / early 90's Chinese (square getter) tubes. It makes a difference! The Telefunken Smooth Plate ECC83 / 12AX7 Vacuum Tube is a miniature type used as a phase inverter or amplifier in AC/DC radio equipment and in many diversified applications such a multivibrators or oscillators in industrial control devices. Another common name for the 12AX7 tube is ECC83 and for premium versions the 7025 and ECC803 audio tubes. It is fairly easy to hear the difference when you are listening to a solo guitar track, but in a mixnot so much. Their ECC83 is the most famous ECC83 / 12AX7 ever. Looking for ECC83, 7025 Tubes? You can use any current production 12AX7 tube as 12AX7A, ECC83 or 7025. 12AX7 (ECC83) TUNG-SOL. My "go to" 12AX7 is the "Baldwin Greenie"--basically a re-badged Sylvania long black plate (vintage, from Baldwin organs)--I use them in phono stages and the front end of my ARC tube pre-amp--high gain and really clean and noise free. The dual triode design makes the ECC83-TK (12AX7) compact, relatively inexpensive, and produces a high quality full frequency response. 5 preamp MFA preamp Conrad Johnson Premier 15 phono preamp Pilot SP-210 preamp Jadis preamp Aesthetix Rhea, Io, Calypso George Wright phono THD Plexi-50 MXL V69 Mogami Edition 12AX7 Telefunken Smooth Plate NOS from bulk pack sold out) ECC83 Telefunken Diamond Bottom West Germany smooth plates NOS in white boxes. This new production Tungsol tube is manufactured at their Xpo-Pul factory (also known as Reflektor) in Sarat. Some people criticize this scheme, but I'm. Get a low price and free shipping on thousands of items. Rod ~ World Tube Company Mullard The Mullard 12AX7 / ECC83 is a Very Smooth Sounding tube. Why is it so popular? What is the reason that so many pre-amp amplifier? What is the difference between 12AX7 and ECC83?. Just mail them to me TWIN c/o The Marshall forum, and I will exchange them for some nice SAFE New Production 12AX7's. I wasn't seen born then. 12AX7) are preamp tubes (or at least are used that way most commonly). Find helpful customer reviews and review ratings for JJ 12AX7 / ECC83 Preamp Vacuum Tubes (Three Pack) at Amazon. Hi, comparison of the 12A?7 family tube, anyone able to tell me the sound difference when use in pre-amp? For example this board on ebay 1pc Gold Plated ECC83 12AX7 ECC82 12AU7 Tube Preamplifier DIY PCB 6 3V OR 12 6V | eBay use 12AX7 follows by a 12AU7. This thread discusses their origin a little bit. 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 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. Our highest-gain preamp tube, this tube has a hugeÊ amount of gain, with terrific output that makes it aÊ great choice for driving modern, complex high-gainÊ circuits. New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more!. Thanks very much for the article regarding the fake Telefunken ECC83. (PDF) ECC83 Datasheet download. with ECC83 card, it reads 49% 2. The 12AX7 Tungsol has high gain, ultralow microphonics and superb linearity. For example a 12AX7 was available as 7025 (JAN/Military), ECC83 (England), CV4004 (France?), etc. Telefunken ECC83. The grids are all gold plated as the original Telefunken The valve is the most neutral and has the warmest vintage tone of all the current production ECC83/12AX7 types. Low noise and very low microphonics makes this a great preamp tube for your amplifier. It's not a significant difference, but it is there and I much prefer the sound of DW's. Get a low price and free shipping on thousands of items. "Genalex" Gold Lion 12AX7 / ECC83 Some of you have been asking if I could make some of my tube testing available again. *note: mostly they use selected quality of this tube (see RT001, RT010 or alternativly RT008 + RT080). 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. ) sound nice. ECC83 was the European designation for the 12AX7 -- the tubes were functionally identical. In fact it is a channel tube of our pedal “tube beta hybrid” in a separate box, but there is one difference. The 12AX7 , 12AT7 , and 12AU7 all belong to the same family of nine contact, twin triode tubes. And as DrTechno says, ECC83 and 7025, etc. Looking for ECC83, 7025 Tubes? You can use any current production 12AX7 tube as 12AX7A, ECC83 or 7025. 3 volt, 340 mA filament supply (whereas a 12AX7 may be operated from either 6. Mesa/Boogie MESA 12AX7 Preamplifier Tube Features: Premium-grade, high-gain preamplifier tube. The Mullard 12AX7 long plate square getter is the best I ever heard. " This truism places the 12AX7/ECC83 class at the top of a list for the most important tubes in your amplifier. 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. 5AR4 / GZ34. 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. The Gold Lion ECC83 / B759 is yet another great 12AX7 tube from Russia and another in the line of large plate dual triodes. ECC83 was the European designation for the 12AX7 -- the tubes were functionally identical. EQUIPMENT USED The amplifiers used were: 70 's Fender twin reverb fitted with J. Also my fave low gain tube a GE5814 is merely a Industrial designation 12au7/ecc82 but no 12au sounds like it. Between 12AX7 and 12AX7A, for example, one is designed to be used only in parallel circuits (12AX7) whereas the other can be used in circuits wired in parallel or in series (12AX7A). American VS. Vacuum Tube Warranty & Return Policy. Please check out the new Shuguang Psvane 12AX7-T as replacement. A Comparison of Current Production 12AX7 Tubes by Kurt Prange. The Original Genalex Gold Lion ECC83/B759 tubes are considered among the best ECC83 / 12AX7 types ever made. I should add that, obviously, almost all these tubes are designed other names by other companies or for other purposes. I replaced the 2 chinese 12ax7's with one of these medium tesla/slovaki tubes and for the other tube i used The electro harmonix Mullard. The 12AX7 has the highest gain at 100, the 12AT7 is lightly lower and the 12AU7 is the lowest gain of the group. 12AX7's are known for their rich even order harmonic distortion when driven into overdrive. Tung-Sol 12AX7 ECC83 Dual Triode Tube The Ultimate 12AX7 -- it's big, warm, and musical with High Gain, ultra-low microphonics, and superb linearity with a dynamic 3-D sound. This 12AX7/ECC83 is a new production copy of the famous Mullard 12AX7. Most orders are eligible for free shipping. Search for the 'ultimate' 12AX7/ECC83 valves If this is your first visit, be sure to check out the FAQ by clicking the link above. You Will Be Surprised by the Difference from the First Tone. the factory item "12AX7B" is Shuguang's better selection item versus their "12AX7" or "12AX7A". 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. The dual triode design makes the ECC83-TK (12AX7) compact, relatively inexpensive, and produces a high quality full frequency response. Thanks guys, great info. A Comparison of Current Production 12AX7 Tubes. This is the European part number and the American pert number is the 12AX7. privater Brief WIEN 1859 an v. >I have a circuit currently using ECC83 tubes, but the designer says that a >12BH7 would give lower distortion. If money is at all a concern that will outwiegh the difference in tone. The dual inputs have 6db of difference in level between them. My Crate V-16 came with three 12AX7 pre-amp tubes. Question: if my guitar amp (old Echolette M40 -actually a PA amp) has 4 channels, can I put 4 different types of tubes, 1 in on each channel? Kind of dumb question maybe. Wow sounds killer really warmed the amp up yet kept the clarity. the other difference between the two tubes is that the ecc85/6aq8 has less gain. 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. I felt as if I could reach out and stop a cymbal that I finally heard correctly in the center of the sound field. Get a low price and free shipping on thousands of items. I went through every combo several times TAD/TAD, TAD/TS, TS/TAD, and TS/TS. They are cool tubes, and they have a different personality than the more common 12AX7 preamp stage. RCA 12AX7 ECC83 TIGHT MATCH PAIR BLACK PLATE TEST NOS LATE 1950'S. Kostenlose Lieferung für viele Artikel!. One day, in the middle of work time, a colleague entered my office to ask something and from the corner of my eye I glimpsed a man who was staring like hypnotized into an amplifier. Even the standard types made in Heerlen (shown in the first two pictures on the left side and labelled Amperex, Valvo, Philips a. Special quality types are: M8137, CV4004, 6057 & VX7059. 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). I'm definatly going to try one in the PI of my Roadster. We carry a vast number of 12AX7 tubes to help you get the right sonic from your gear. 2 Meg Ohm Many good circuits will not push any of these to the max limits, others will. 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. ) sound nice. The old, vintage tubes make simple, yet interesting decor. If you're playing clean, it doesn't make that much difference. See our Best 12AX7 Review for more information. Schiit Mani gives you the flexibility you need for both moving-magnet and moving-coil cartridges, together with exceptionally accurate, and low-noise performance. Les plus recherchés sont les Telefunken, Amperex, Mullard, et Siemens. A Comparison of Current Production 12AX7 Tubes by Kurt Prange. The 5963 is a computer valve that is similar to the ECC82. 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. I prefer a post 1962 Mullard ECC83 in. The original tube was from Yugoslavia (not sure of the brand name) and I had replaced it with an Electro Harmonix 12ax7 that had pumped up the gain but added more feedback and a brittle high end even after breaking in. Your recommendation for me to use Sovtek EL84Ms, V1 = Mullard 12AX7 CV4004, V2= Ruby 12AX7 7025SS HG, and V3= Mullard 12AX7 long plate is a HUGE improvement compared to the JJs that I had in the amp, and far superior to the OEM tubes. Audiotubes. 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). Same routine - warmed up the amp and then gave them a listen. >I have a circuit currently using ECC83 tubes, but the designer says that a >12BH7 would give lower distortion. no big deal. 12AX7 (also known as ECC83) is a vacuum tube that is a miniature dual triode - 6AV6 with high voltage gain. Is it correct and is the 12BH7 a drop-in >replacement for the ECC83? The 12BH7 is a very different tube from the 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. Most orders are eligible for free shipping. Title: 12AX7 6AX7 Author: Sylvania Subject: JA-FP-2002-03-23 Created Date: 3/24/2002 12:54:30 AM. Vacuum Tube Warranty & Return Policy. matter) as a whole. It actually over compensates and the values should be more like 100K and 91K. 12AX7 tube is the most common preamp tube today. "Genalex" Gold Lion 12AX7 / ECC83 Some of you have been asking if I could make some of my tube testing available again. Cryogenic Treating. Just received my Mullard GZ34 (7 Notch). Tube 12AX7 or Röhre 12AX7 ID3730, Double Triode, Noval, B9A and Audio Frequency shown. A Comparison of Current Production 12AX7 Tubes by Kurt Prange. 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). ( 5755/420A is not a direct replacement tube of ECC83/12AX7 )!! 5755/420A+ socket converter = ECC83/12AX7 !! You need to buy a converter socket if you want to use 5755/420A in your ECC83/12AX7/5755 amp!! We have such socket for sale, just choose on the bottom of this page! Western Electric 420A=5755, similar to 12AX7/ECC83 but different pin layout!. Having a very smooth response with articulated bass, this tube is one of the most desirable 12AX7 variants available. SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. Like The only differences are gain, the headroom is an issue of the amp. It makes a difference! The Telefunken Smooth Plate ECC83 / 12AX7 Vacuum Tube is a miniature type used as a phase inverter or amplifier in AC/DC radio equipment and in many diversified applications such a multivibrators or oscillators in industrial control devices. Do different 12AX7 preamp tubes (sometimes referred to as ECC83) -and equivalents such as the 12AT7 - make any sonic difference? We try several sets in the V1 position to find out. They don't simply mean the type of vacuum tube (for example, 12AT7 versus 12AU7) - they already know the type that they will be using. They were new, and they cost less than the NOS Teles I had been listening to. In fact it is a channel tube of our pedal “tube beta hybrid” in a separate box, but there is one difference. Also, as tube manufacturing became refined, the 12AX7A became much quieter. com FREE DELIVERY possible on eligible purchases. Differences in physical construction are reported to cause different tonal response (EG more/less middle frequencies). 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. Positive Feedback ISSUE 76 november/december 2014. They require a noval 9-contact socket. For the every growing search accompanied by escalating prices, finding good NOS 12AX7's gets tiring (and expensive). (*)These specifications are provided 'as-is', with no warranty of any kind. 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. This thread discusses their origin a little bit. ECC83 vs 12Ax7 Tubes - What is the Difference? One of the more confusing things about tube amps is changing them, especially when there seem to be so many different kinds available. 12AX7, 12AT7, 12AU7,12AY7, and another I forget are all interchangeable, the only difference is gain, AX is the hottest, I think I have the gain order correct. Tube Testing. For example a 12AX7 was available as 7025 (JAN/Military), ECC83 (England), CV4004 (France?), etc. 12AX7) are preamp tubes (or at least are used that way most commonly). Compared to a Tung Sol it sounds a bit flat, but so does a NOS Mullard. 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. The Rib plate is also a very good quality tube. These tubes are some of the best sounding tubes you can get. The tubes have well balanced triode pairs and a very even flat response. 12AX7 US = ECC83 European. À cause de sa puissance, Marshall prit rapidement la décision de le construire sous forme de tête, accompagné par un baffle 4x12 monté avec des haut-parleurs de la marque Celestion. Same grade as Ruby 12AX7ACZ HG. 2 Meg Ohm 12AX7 long plate and 12AX7A: Plate 1. What is the difference between a 12AX7 and an ECC83? The term 12AX7 is the American model number for the ECC83. Preamp Tubes - 12AX7 / ECC83 / CV4004 / 5751 Tube Basics and FAQ. 12AX7 TELEFUNKEN SMOOTH PLATES Nagra PL-L preamp VTL 7. Original Genalex Gold Lion 12AX7/ECC83/B759 tubes are considered among the best 12AX7 types ever made. The TESLA (NOT JJ) E83CC frame grid tubes are the BEST you can buy, when you do not want to spend. Of course, these are made in Russia and not England like the originals; but that seems to be about the only difference. It may mean it is a specially robust 'military grade' valve or may mean it has specially low noise / microphony. JJ Electronic ECC83MG - 12AX7 Factory Data Sheet: ECC83MG Our observations: Another 12AX7 variant from JJ. The Tung-Sol name and trademark have been acquired by the New Sensor Corporation. It is fairly easy to hear the difference when you are listening to a solo guitar track, but in a mixnot so much. These Gold Lion 12AX7 re-issues sound incredible: A full, glorious mid. The famous Telefunken ECC82 and ECC83 (12AU7, 12AX7) were introduced in mid 1940's, there was a date code with two lower-case letters to show the production date, but now most tubes wiped off, the only permanent symbol is the "<>" mark at the glass bottom, the top sound quality led to big demand from market and worldwide recognition. Current Production 12AX7 Tubes Click on this image for a larger image I have been promising a current test of some of the current production 12AX7 / ECC83 offerings and have just completed my testing. The magic was gone. ECC83 vs 12Ax7 Tubes - What is the Difference? One of the more confusing things about tube amps is changing them, especially when there seem to be so many different kinds available. The 12AX7 Tungsol has high gain, ultralow microphonics and superb linearity. The dual inputs have 6db of difference in level between them. This new production Tungsol tube is manufactured at their Xpo-Pul factory (also known as Reflektor) in Sarat. A tube I thought is better than the 3rd place Mullard 12AX7 round plate are the Raytheon 5751 windmill getter. Preamp Tubes – 12AX7 / ECC83 / CV4004 / 5751 Tube Basics and FAQ. ) sound nice. Question: if my guitar amp (old Echolette M40 -actually a PA amp) has 4 channels, can I put 4 different types of tubes, 1 in on each channel? Kind of dumb question maybe. Most orders are eligible for free shipping. My favourite high gain amp 12AX7's are the late 80's / early 90's Chinese (square getter) tubes. 12AX7 and 5751 (equiv. 12AX7 was the US designation for it's consumer grade version of this tube. Looking for ECC83, 7025 Tubes? You can use any current production 12AX7 tube as 12AX7A, ECC83 or 7025. The Telefunken ECC83 / 12AX7 was made with both Rib Plates and Smooth Plates. 00 (and cheaper) tubes. Seller stated Telefunken 803s are not as good at $1K+ each. But if the designer says it will work in THIS application, you should assume it's OK to make the substitution. Having sold group hearing aids to schools for the deaf back in the 1950's I can assure you that there are differences in the 12AX7 family. Difference between ECC83 (12AX7) and ECC82 (12AU7) I'd like to know what the difference between those tubes are and if I can use the ECC82 instead, in an amp that I. New Genalex Gold Lion 12AX7 / ECC83 / B759 Gold Pin Vacuum Tube. And yeah, when you’re up and playing, nobody in the audience would hear a difference with any of these tubes. As someone else pointed out, probably the people at the bar won't notice the difference. So I am a green learner. RCA and Sylvania first introduced the 12AX7 to the world in the late 1940s. Is it correct and is the 12BH7 a drop-in >replacement for the ECC83? The 12BH7 is a very different tube from the 12AX7. It was sold as a "lower noise" version of the 12ax7, but is identical in electrical characteristics. The smooth plate is one hell of a tube. E83CC is an old term for a special high quality ECC83 (=12AX7). The difference in anode resister value compensates for an average unbalanced normal 12AX7. I've found a great. Sound differences of preamp tubes in a Carvin Vintage 16 guitar amplifier in V1 position. The Mullard 12AX7 long plate square getter is the best I ever heard.