Ecc83 vs 12ax7. Harmonically rich, with a detailed low end and a warm high end. 12Ax7. This Mullard CV4004 / 12AX7 Reissue looks nothing like Mullard tubes of old but it has a lot to offer. 34. It is what is called a ‘double triode’. Has a maximum diameter of 22. Its electrical characteristics look to be way off from the 12A*7, which would require a redesign. The 12Ax7A is compatible with both the parallel and series circuits, while the 12Ax7 only supports parallel circuits. And, the distortion is primarily lower-order. JJ has become a very popular and well-known brand over the last few decades. This gold pin Slovakian tube takes the characteristics of the plain pin 12AX7/ECC83 version and boosts them up a notch. Telefunken ECC83 long (17mm) smooth plates (on the left); EI ECC83K, well known among audiophiles as “short (14mm) smooth plate ECC83”, an extremely rare and surprisingly well sounding ECC83 / 12AX7 (right) Preamp Tube Descriptions. Designed to allow for cleaner headroom than higher gain 12AX7s when pushed into overdrive, it offers distortion with strongly defined lows, a rich mid range and clean, smooth highs. These JJ Electronic tubes are tested by Magic Parts™ for Jul 8, 2010 · The short answer is no, they are not interchangeable. The 12AX7’s high gain can make it prone to clipping and distortion, whereas the 12AT7 can give you more headroom. Mar 12, 2024 · 12Ax7A Vs. 2mA as by the text book. The 12AY7 valve versus the 12AX7 (ECC83) valve. The JJ ECC83-MG is a fine sounding tube. Using my Peavey XXX amp and Ibanez RGD61ALET Fishman Fluence equipped guitar. Apr 22, 2018 · Here are a couple of differences in the maximum allowed specs of the 6N2P versus the 12AX7 and 12AX7A. JJ 12AX7/ECC83S (Best Value) JJ 12AX7. Jul 20, 2003 · I guess RadioLee wants to know the audible difference between TFK smooth plate and TFK ribbed plate. The application for the 12AY7 is usually an Jan 26, 2013 · 2013-01-26 9:12 pm. 7. Uf = 6,3/12,6 V. Summary: Made for function, not flair. Still, the differences prove insignificant in most of the cases so it’s possible to use the tubes interchangeably. As far as differences in sound between Javascript must be enabled to use this site. Sep 4, 2023 · The main differences between 12AX7 vs 12AT7 are: The 12AX7 has a gain output of 100, whereas the 12AT7 has a gain output of 60. Rugged enough they often come stock in many amps. I got a good deal on four Ei ECC83 tubes, two Philips branded, one Siemens and one RSD, al NOS and in their original boxes. 12AX7 - ECC83 - 7025 - E83CC - 5751 - CV4004 - EXX803S - IN STOCK - FAST SHIPPING - AUSTRALIA and NEW ZEALAND. 독일 텔레푼켄 : 텔레푼켄 ECC83 / 12AX7 은 진공관 앰프 사용자들의 영원한 로망인 진공관 프리앰프 마란츠 7 에 사용되어. 12AX7 and ECC83 are virtually the same, although in theory a real ECC83 will always have a low noise spiral-wound heater; a 12AX7 might not, although many actually do. Genalex Gold Lion 12AX7/ECC83 Gold Pin Preamp Tube Features: Premium 12AX7 with gold pins. Originally, the 12AX7 / ECC83 vacuum tube was introduced to be a superior option for lower noise and microphonics over the 6SL7 tube that was commonly used in the 1940s. Dec 1, 2017 · The most exclusive ECC83 12AX7 type is the Genalex Gold Lion ECC83. be/PN9HkZ3weB4I decided to get a brand new Mullard 12AX7 preamp tube to compare with th Feb 24, 2023 · Video in which i compare modern and vintage tubesNOTE; Use hi quality speakers or headphones to listen to the samples. but to be fair, less gain does not mean low (est) gain, and they will still distort and add the tube flavour. Apr 25, 2018 · Meeting a Legend. normal short (14 mm) plates. The bass is not particularly deep and tends to merge with into the midrange. It has two identical triodes both of which have a high voltage gain. 電圧 利得 が大きく、 ギターアンプ 用真空管として多く使用され、発売以来継続して生産されている数少ない小信号用真空 Mar 25, 2021 · The Sound Character Of Some Famous ECC83 – Tube Rolling Part 2. Each. GENERAL IMPORTANT REMARKS ABOUT ECC83: Ever since I test NOS ECC83 and 12AX7, I find that the average of new production is not at 1. Dec 28, 2014 · 6,269 5. in the case a direct replacement is not available ) I would go for 5751s ( similar ratings and a mu around 70 ) 7025s ( mil-spec version of the 12AX7 ) E83CCs ( Special quality version of the 12AX7/ECC83 ) and ECC803s ( ECC83 with a specially designed spiral heater for low hum ). As explained in Everything You Need to Know About 12AX7 page; these tubes are really the same thing. #2. We now have the reissue CV4004 (ECC83) version in stock. The Rib plate is also a very good quality tube. Add Your Review. A centre tapped heater permits operation of the tube from a 6. This tube is well-balanced and is relatively low in noise. IME, the 12AX7 has favorable distortion characteristics for a phono stage. Its trademark tone is that crisp and bright top end. Oct 4, 2016 · The ECC83 family. Top-quality preamp tubes from a legendary manufacturer. The transconductance on my sample was the same as two NOS The 12AX7 tube, also known as ECC83, is a dual-triode tube commonly used in preamp stages due to its high gain and low noise characteristics. Availability: Usually ships within 24 hours. This valve is still found in todays designs of hi-fi audio amplifiers “Ei-RC” – Electronic tubes factory ECC83/12AX7 ECC83 is A. 12AX7: Plate 1 Watt, Grid resistor 2. 6n4 lacks clarity but has tube taste. We would like to show you a description here but the site won’t allow us. Double Triode Data Sheet Page 1 of 4 . Nov 5, 2018 · ecc83/12ax7 tubes come in different flavours with less or more gain. 텔레푼켄 진공관은 독일의 베를린 (Berlin) 과 울름 (Ulm) 2곳에 생산 공장이 있었답니다. Old Mullard with large plate structures are sought after for audio systems because of their gain and detail. The Original Genalex Gold Lion ECC83/B759 tubes are considered among the best ECC83 / 12AX7 types ever made. It really depends on the year made. Mar 10, 2014 · The Mullard 12AX7 / ECC83 Reissue is a nice vacuum tube but in my opinion better suited to home audio than guitar amps. B9A indirectly heated twin triode is one of the most popular pre amp valves around. Download 12AX7 ECC83 Datasheet PDF. Design and Construction. We've compiled our findings into a chart that shows you rating scores for each vacuum tube's microphonics, noise, and musical detail/dynamics. New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more! Mar 10, 2016 · 3. In a couple old blackface Super Reverbs, the RFT conjures inspired, butter churnin’ glory. Compatibility: 12Ax7A Vs. The Mullard 12AX7 square getter pair of tubes that test about same as new is $400 used and $550-$600 in NOS. To use it in a 12AX7/ECC83 circuit you need to rewire the heaters. Base: NOVAL. This makes it better suited for genres requiring clarity and nuance. ECC83 is the British designation and 12AX7 the American. OK, so this was my first tube roll experience after experiencing tube amplification for three years. Understanding the internal structure of the tube is essential to comprehend its circuitry. I have a pair of the rare Blackburn / Mullard TechTube E813CCs -- the 12AX7 replacement using CRT gun technology. 1mA. Sep 24, 2009 · Right now I have a GE long grey plate D getter, a GE 12AX7A short grey plate halo getter, a CBS Hytron 12AX7A long grey plate halo getter, a GE 7025 short grey plate halo getter, a Matsushita 12AX7 short grey plate halo getter, and an RCA long black plate square getter all from the 50s or early 60s in my Fisher X101C and it sounds wonderful. The Telefunken ECC83 / 12AX7 was made with both Rib Plates and Smooth Plates. Sep 29, 2022 · In this video I tone compare a Matsushita 12AX7 up against a RCA 12AX7A tube. Mar 29, 2023 · In this video I sound test 2 tubes that test good, a Telefunken ribbed plate round getter 12AX7 and a Marshall China made Shuguang ECC83 triple mica gray pat Jul 1, 2020 · Behold the little-hailed (but soon to be legendary) hero – the RFT 12AX7 – a rarely discussed/under-the-radar preamp tube that simply takes your tone and darkens it up, then breaks up early as all get out to deliver fat, greasy, semi-compressed mids. Tailor-made for high-gain applications. These tubes are some of the best sounding tubes you can get. Another common name for the 12AX7 tube is ECC83 and for premium versions the 7025 and ECC803 audio tubes. It was made in the Telefunken plant in Berlin – and has some distinctive marks which we have to talk about later. Very quiet and low in microphonics. 7. 12AX7 comparison at a glance. In high voltage test the NOS Mullards were about 98 to 101% of the RCA spec. It has a low (ish) internal resistance (approx. 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. 4. Amplification factor. They are hard to find and when they are available, they are expensive. The current production Svetlana is a New Sensor product and is a member of 12AX7-EH and Tung-Sol 12AX7 family. I realise photos are the go. The B759 is a very low noise Genalex UK made 12AX7, with matched triode elements. hard to generalize because all circuits are so different. Tubes seem a bit tricky to photo with all the glass reflecting. • 5 yr. 2 Watt, Grid resistor 2. Sep 4, 2006 · 09-05-2006, 09:33 AM. ) Svetlana 12AX7 - For several years the original Svetlana 12AX7 tube from St. 3V or a 12. Has maximum overall length of 56mm. 136. where more gain does not mean brutal high gain of your favourite metal band on its own lets say your amp has 3 preamp tubes, if you put 3 highgain 12ax7 in it, you Dec 30, 2021 · Hard to beat Telefunken for performance and reliability. The Gold Lion tubes are carefully engineered and crafted in Russia to outperform any tube on the market. The initial “12” in the designator implies a 12-volt heater requirement; however, the tube has a centre-tapped heater so it can be used in either 6. In September 1947, RCA Engineers Company developed and designed the preamp tubes for the public under the name 12AX7. The tonal characteristics were easier to hear. g. Summary: A small plate design more suited to high gain amps. Mar 27, 2007 · But the 12AX7 and ECC83 are simply different nomenclature - just like 6BQ5/EL84. *. Using my Pe The RFT ECC83 preamp tube is well known as a fantastic hard rock "crunch" tube in Marshalls, Mesa-Boogies, and similar amps. Amazon Price Today. All in all, ECC83S differs from 12AX7 in two aspects: resistance (6 Ohms vs. These 12AX7/ECC83 preamp tubes are the most popular tubes for guitar amplifier preamps. This Chinese made Genalex offers a pleasant top-end chime and a leaner tone overall than the gold pin B759 version. The JJ ECC83 is a very popular 12AX7 among guitar players and musicians. Nov 24, 2023 · 12AX7/ECC83 Preamp Tube with Gold Pins. Normally, ribbed plate is a little bit better with more details, also better high frequencies, clear damped bass. The 12AX7 is mostly used in the preamp section of guitar amplifiers to boost the pickup signal Feb 26, 2016 · It has the positive points of gold lion ecc83, the shuguang has clear midrange similar to gold lion. There are also tubes that can substitute for 12AX7. 12AX7 long plate and 12AX7A: Plate 1. Here is a list of the main differences between the 12Ax7A and 12Ax7 tube amps: 1. Aug 9, 2021 · 12AX7 ECC83 Datasheet. A 12AX7A that blends high-gain and low microphonics. OTOH, the 6DJ8/6922 does better, at higher signal levels. 12AX7 ECC83 5751 7025. Other NOS Treasures 12AX7 Types. JJ ECC83-S / 12AX7 | Matchless HC-30: Excellent Phase Inverter. ago. Sep 10, 2021 · PART 1 of the preamp tube comparison can be found here: https://youtu. Dec 1, 2019 · 真空管の比較試聴比較の方法はレコードのイコライザー回路で使用している12AX7を東芝製とJJ製とで比較してみました。録音レベルが小さめなので Nixxuz. This is a small plate design more suited to high gain amps. However in terms of clear midrange or clarity wihch is same thing, gold lion is slightly better than ecc83. 3. 16 Ohms) and country of origin (British vs. This means that if you’re using your amplifier to drive a speaker, it’ll feel a lot more powerful with a 12AX7 than with a 6SN7. Designing a Class A push-pull audio amplifier using the ECC81, ECC82, and ECC83 valves is very simple if you read this wonderful article. Microphonics is not an issue despite the larger that average plate structure. The 12AX7 preamp tubes have a 9-pin miniature. It retains all of the definition and detail that the May 28, 2020 · Lothar's Guitar School - Gear Talk - Preamp Tube Camparison - ECC83 vs ECC81 vs 12AY7 vs ECC82 In this episode I show you 4 different preamp tubes. Well, as it turns out, while I was seeking consensus on this forum, the particular Telefunkens that I was eyeballing were sold to a gentleman in Hong Kong (the quick and the dead). Petersburg (Winged "C"/SED) tried to develop a good 12AX7 and mostly failed. Summary: This should be on your short list. Many good circuits will not push any of these to the max limits, others will. The only noticeable difference between the two was a bit more gain from the WB model. Main 12AX7 / ECC83 / 7025 tube reviews page. Tube Depot carries a selection of 12AX7 / ECC83 / 7025 / CV4004 Pre Amp Vacuum Tubes. Compared to a Tung Sol it sounds a bit flat, but so does a NOS Mullard. The Genalex / Gold Lion ECC83 /12AX7 vacuum tube (not gold pin version) is a lower cost alternative to the Genalex / Gold Lion B759 / ECC83 gold pins preamp tube. I The facts about ECC83 and a short type classification. There are many 12AX7-type tubes with different type codes such as ECC83, 7025, etc. Amplifier Design using ECC81 ECC82 and ECC83. Javascript must be enabled to use this site. Detail and Dynamics. The 12AX7 Valve (or 12AX7 vacuum Tube) is a small preamplifier valve which is identical to the ECC83 – same valve, just a different name. The average is always around 1. Best regards Sweetwater is very proud to offer you these top-of-the-line vacuum tubes. The following are the key application areas Jul 19, 2010 · 1,038 posts. 300/150 mA. Re: Tonights Match: ECC83 vs 12AX7, 6L6 vs EL34. 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. We have the ECC81 ECC82 ECC83 was introduced specifically for audio applications way back in 1954 to replace the earlier 6SL7 octal based valves. for the ECC83/12AX7. With the exception of the box-plate Mullards, all the western European ECC83s were either long-plate or short-plate designs, that I am aware of. 00. TIMESTAMPSMESA BOOGIE: 0:00MULLARD (Vintage England): 2:36GENALEX (Gold Lion): 5:08AMPEREX (Holla Original Genalex Gold Lion vacuum tubes are considered among the best 12AX7 preamp tube types ever made. This preamp tube has a short plate format for reduced microphonics and has Jun 28, 2019 · The 12AU7 (Fig 1) is a preamp tube that’s part of the same class that includes the 12AX7 and the 12AT7. Sep 27, 2016. Best for clean tones as well as for sounds requiring deep-bass power like any modern preamp. Kind of similar to the Gold Lion 12AX7/ECC83/B759, the Mullard seems a little brighter, neither are harsh. For a bigger , thicker sound and lower noise , you might try the JJ 803 S , especially in the first position ( V1 ) . 2mm. Thanks to its design it also peforms with very low noise and microphonics. 6N2P: Plate 1 Watt, Grid resistor 0. Also for new tubes, and 1. The 12AY7 valve (also known as the 6072) is a 9-pin tube. It has short plates and gold pins. In Part one we discussed in which way the difference between different tubes can be determined. As I understand it, the ECC88 is also not a sturdy tube, from a mechanical standpoint - superfine grid wire, easily misaligned - better The TELEFUNKEN ECC83-TK is a well-balanced tube suited for all types of music and playing styles. Subscriber. Rod ~ World Tube Company Mullard The Mullard 12AX7 / ECC83 is a Very Smooth Sounding tube. PSVANE 12AX7/ECC83 Preamp Tube Features: A high-quality replacement preamp tube for 12AX7/ECC83-loaded guitar amplifiers. According to its datasheet, some of the main specs of the tube are: Amplification of 100. 6V heater circuits. The lack of microphonics may be due in part to the return of a shorter plate structure or better materials. They have a very large plate and a spiral filament for lower noise - you may get more USEABLE gain with them , less fizz, more beef etc. Since the Americans invented it (RCA in 1946) I guess it should really be called the 12AX7. For the price point, Gold Lions are by far my favorite. And then you get to worry about remaining stock, like in the current case of the Svetlana "Winged C"'s. Feb 28, 2019 · The JJ Electronic 12AX7 / ECC83 has quickly become a modern classic in preamp tubes. The tube consists of two sections, each with a cathode, an anode, and a control grid. ECC83 = 12AX7. 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. 12AX7: Insights. Depends on the use. IP Address: 173. Mullard RI ECC83/12ax7. In all practicality, these are all 12AX7. Going through different types of current produced JJ Electronics Ecc83/12ax7 tubes, talk about them and see what options you have in a current production and Mar 10, 2016 · Microphonics. 5 Meg Ohm. JJ 12AX7A / ECC83 Preamp Tube. The 12AX7 is a miniature high-mu twin triode. The CV4004/12AX7 has a "box" style plate - very rectangular - with some round vent holes along the edges. They first started under the title A-4522. Sep 27, 2016 · Speakerfixer. These premium vacuum tubes make great replacement Jan 1, 2019 · Mollina (Inland Southern Spain), Málaga, Spain. 5000+ ohms) and is usually used with higher standing current (approx. " Rock and Roll IS a contact sport!" Sune. Sometimes a bit to crisp for high gain distortion Mullard 12AX7 / ECC83 Preamp Vacuum Tube. Noticeably more gain, too. JJ Electronics Amplifier Tube is the best 12AX7 tube available on the market at the moment. The Telefunken ECC83 is one of the most important tubes in its class – maybe the most important one. This in a standard calibrated test circuit not unlike your Fender amp. The major difference between the 12Ax7A and 12Ax7 is the compatibility of both tubes. Dec 21, 2003 · As I recall, the older "BVA" Mullard Shield type ECC83/12AX7 has the more "traditional" ribbed plate structure, visually similar to the RCA style, although some of the plates are taller than others. I’ve grouped the Sovtek 12AX7-WA and Sovtek 12AX7-WB together because they have essentially the same sound. 07-20-2010 at 08:08pm. The TAD 12AX7A-C / ECC83 TAD Premium Selected provides very good gain, tight deep bass, fat mids and silky top end with overall definition and brightness. Because of this it is rarely used in guitar preamps and is much more commonly found in the reverb section of the amplifier. Super-low noise — zero cathode-to-filament-induced hum and other annoying sonic artifacts. I'll give it a go. HG is great for use in any stage of low and mid gain amps, and all but the first stage of high gain amps. DOUBLE TRIODE. They all are equivalent to 12AX7 tubes. Grey rows represent discontinued and unavailable tubes. The balanced tone of the JJ 12AX7 works well in any amp. Mullard CV4004/12AX7 - Not quite as toneful as the 12AX7/ECC83, but still nice. The ECC83 Valve – also known as the 12AX7. The ECC88/6DJ8 would not be a good substitute for the 12A*7 "family" of tubes. 95. These tubes are rugged little brutes, and that’s Shu Guang and JJ Preamp tubes compared in V1 of 5F1 Circuit with Vintage 10 inch Alnico speaker. American VS. I have experimented with other tubes in this position (see list below): - Tubestore Prefered Series 12AX7. They are slightly darker sounding than many other 12AX7/ECC83 tubes. On the other hand, the 12AU7, with its lower gain factor and high plate resistance, provides a cleaner sound with less preamp distortion. If = ca. Original tubes in the Raysonic SP120 were all Shuguang (12AX7 inputs, 6SN7 drivers, and KT88-98 for power) in ultra-linear operation. This new production 12AX7 / ECC83 preamp tube is New Sensor's reissue of the famous Mullard 12AX7. I was unable to notice a loudness reduction compared to the standard JJ ECC83S tube. I purchased a brand new DC-30 (Head) in 2017. ECC88 is a frame grid, high frequency twin triode. 1. They exhibit a large detailed soundstage that is sought after by discerning audiophiles who demand the highest quality sound. All Tele’s ECC83 / 12AX7 are long (17 mm) plates vs. Feb 20, 2020 · 12AX7 Preamp Tube. They all Aug 20, 2008 · If I was to replace 12AX7s with a different tube ( e. And don't ask me why that is, but it is so with NOS and NEW tubes. Of these three, the 12AU7 provides the least amount of gain. Our stock was received in bulk packs so we have packaged these ECC83 tubes in our own white boxes. 17- ECC83/12AX7WC/SOVTEK. This JJ-ECC83S preamp tube ships stock with Matchless HC-30's or at least it did in 2017. The latest Russian re-issue is a perfect example. The T-12AX7-S-JJ vacuum tube from JJ Electronics comes as an immensely versatile preamp tube, compatible with hi-fi and guitar amps. It was originally designed as a low noise tube and was actually developed before the 12AX7 (ECC83). The smooth plate is one hell of a tube. 0mA is normal too. It has a total of 9 plates which are terminal connections. Selected with balanced systems and recommended for guitar amps to improve overall response. America). That means smooth plate will give you warmer and richer mid range. 더욱 유명한 관입니다. 12AX7は、もともとオーディオ用増幅管である双三極 GT管 の 6SL7 ファミリーをミニチュア管で代替する用途で開発されたものである。. The Mullard square getter is just a little smoother overall with no loss in detail so it gets the edge in performance. Noise. F. It utilizes a medium length ribbed plate design that is much like the old Amperex and Brimar European designs. Developed by RCA and released in September of 1947, the 12AX7 is a Feb 14, 2022 · Listen with good headphones to hear the differences better. Genalex Gold Lion vacuum tubes are legendary in the guitar and hi-fi audio industry for their power, clarity, resistance to feedback, and much more. 숫자로 표기된 제조 코드 Equivalent vs Substitute. 12AX7 Preamp: High gain, more distortion, aggressive response. In samples where guitar sound was playe Apr 13, 2018 · 6. As they make durable tubes with good longevity. Genuine Mullards sound a bit "fatter" by comparison, but they are OK too. Typical characteristic: Ua = 250 V. The Telefunken ECC83 is maybe the one and only tube in the ECC83/12AX7 range, which behaves is such a neutral In this video I tone compare a vintage TUNG-SOL 12AX7 tall plate made in USA preamp tube against a Marshall Silver Plate ECC83 12AX7 preamp tube. In lengthy conversation with Brent, we decided to start with a pair of 1953 Siemens ECC83 long plates. This is actually two valves in one glass envelope. by Jordan. 6V heater supply. This refers to the outline of the socket where you should plug Mar 14, 2023 · The 6SN7 has a plate current of 60mA, while the 12AX7 has a plate current of 40mA. New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more! Nov 27, 2009 · Final tube selection included a head to head using old Mullard build I61 and I63 vs. Sep 16, 2012 · 其在美國RCA膽管12AX7基礎上改進、1953年前后由Mullard力推的ECC83，堪稱當時最優秀的同型號管。 Philips 旗下各家公司和工廠生產的管子都會在其側面或底部加上兩行ID碼（即識別編碼）用于表示該管的產地、生產年份和型號。 Jan 11, 2018 · Having a 12ax7W Mil Spec being similar to a 5751 also makes some sense and could be why other 12ax7 aren't the 'same'. Sure, I might get better sound out of NOS Mullards, but at $400+ per 12AX7 I can honestly say it's not worth it. 3 to 15mA) and relatively low anode voltage (65 to 125V). Boasts a high-gain, low-plate-current, dual-triode design. From our review: "Microphonics is not an issue despite the larger that average plate structure. I got about the same peak to peak signal out of all Apr 19, 2023 · Mullard describe the ECC83 as a high μ double triode, having separate cathodes, primarily intended for use as a resistance-coupled amplifier or phase inverter. ECC88 = 6DJ8. Jul 20, 2023 · ECC83S Vs. Sep 9, 2007 · Philips (and hence Amperex and the other Philips companies such as Mullard and Valvo) adopted a short-plate design for the ECC83 around the same time as the American 12AX7A came out. The tubes have well balanced triode pairs and a very even flat response. It is used in 99% of all guitar amplifiers. I actually still cannot decide weither gold lion has better clarity than 12ax7-T cause they are A. The ECC83 MG is a “Mid Gain” 12AX7 type tube. 6n2p is a similar Russian valve, but with different heater arrangements. Rated 0 - 5 where 0 is Unacceptable and 5 is Excellent. I got the Philips 12ax7W direct from Korea. From our review: "Sonically I find these tubes to have a lot of punch. These Gold Lion 12AX7 re-issues sound incredible: A full, glorious midrange with great texture and liquid detail, extended yet controlled highs, tight bass. 2 Meg Ohm. From our review of the Electro-Harmonix 12AX7 vacuum tube: "The EH-12AX7 preamp tube has a nice balanced sound, a very low noise floor and excellent performance in terms of microphonics. 3. 3V or 12. Has separate cathodes. I heard great things about Ei ECC83/12AX7 tubes made on the former Yugoslavia on old Telefunken (or was it Philips?) tooling and using Telefunken's design. It's high gain makes it popular in guitar amps, though it's also widely used in HiFi amps, especially in phono stages. #12. The Sovtek 12AX7WC is the factory selected version of the WA and WB and is the valve used by Fender and Groove tubes in the 12AX7-R In all the amplifiers this valve was clearly not the best sounding. One of the 2 or 3 "holy grail" 12AX7 tubes ever made at any time, you have to hear these to understand why they are so rare and costly. Fully tested by us and guaranteed. Priced per single tube, a matched pair is $1999. One of my favorites. Dec 29, 2014 #2. 12AX7 is also known as ECC83. ECC83S is 12AX7 high gain pre-amplifying double triode. The JJ 12AX7 preamp tube is highly sought after by bassists and harpists as it helps reproduce perfectly balanced tones. Euro naming. The quality of current production 12AX7's is getting better and better. Mullard 12AX7/ECC83 - This long plate works really well in some amps, and really doesn't in others. Compared to the JJ ECC83-S this tube sounds a little more eager to hit the midrange. Sovtek 12AX7-WA Preamp Vacuum Tube. Aug 4, 2018 · Slightly more bite in the treble and a little more clear overall vs the Mullard 12AX7 long plate round getter. All three of these tubes is virtually identical. 12AU7 Preamp: Lower gain, cleaner output, finer fidelity. (8 Reviews) USD $21. This multi-page document contains a typical valve circuit, recommended by Mullard Engineers, for making a Class A Push-Pull amplifier using two ECL80 triode Mar 18, 2016 · 4. Actually, I can't hear a lot of difference among 12AX7 types – but my hearing is shot anyway. The amplification factor of a vacuum tube is defined as the ratio of the maximum anode voltage to the 6N4 = ECC83 / 12AX7A NOS (square type getter) the 6N4 was made in Peking till 1996 and has been used as stock tube from most guitar amp manufacturers including Fender, Marshall, Mesa Boogie, VOX, Diezel, Engl, Hughes&Kettner and so many more. Review by steven d on May 27, 2010 at 17:08:22. 1. . HG+ has extremely low microphonics and intended for use in the first stage of high gain amps. Although the Ecc83 is the european designation for the 12Ax7, there are subtile sound differences between a true 83 and the 12ax7, plus The Ecc83's are capable of handling more current that most 12ax7. The reissues were about 103 to 106%. This tube is especially suited for use in resistance-coupled voltage amplifiers, phase inverters, multivibrators and numerous industrial control circuits where high voltage gain is desired. This essay should give some global hints in which different brands of the most important NOS tubes of the ECC83 (12AX7) family differs in sound Gestalt used in a line gain stage only. This ECC83 / 12AX7 audio tube is made in China versus the premium version (B759) that is made in Russia. capt_fantasy. ECC88 mu (amplification factor) is This gold pin Russian tube is very similar to the plain pin version. JJ Electronic ECC83MG - 12AX7 Factory Data Sheet: ECC83MG Our observations: Another 12AX7 variant from JJ. Very low distortion, at low signal levels (less than 1 volt signal output). im lc ki hl tn oj hc ls fh ur