12ax7 vs ecc83. 6DJ8 has 6-volt heaters.

12ax7 vs ecc83 Svetlana 12AX7 ECC83 Preamp Tube – Rich Tone & Low. Mullard 12AX7 / ECC83 New Production Preamp Vacuum Tube. Quick reference data: • Anode current Ia=1,2mA • Transcoductance S=1,6mA/V • Amplification µ=100. 12DW7 : Tone, For the SVT bass amp, change Resistor R-25 to a 4. Lingwendil. ECC88 mu (amplification factor) is rated at 33. i think theres something about a 12ax7a being able to work with 6v on the filaments since they can be split but the 12ax7 cant. 221. Expensive fix for a newish amp that I just paid $400 for! I listened very critically to a decent 12AX7 and as raucous and loose-sounding as it was, I was sure I could do better (no amount of EQ-tweaking helped; The 12AX7 is by far the most common out of all preamp tubes. 79. 6DJ8 has 6-volt heaters. Apr 11, 2021 #13 12ax7 vs 12ax7a. I changed no settings on the amp, my Peavey XXX 112 combo. com. New posts New media New media comments New profile posts Latest activity. Then simply plug in the 12AX7 tube (also fine is ECC83 and 7025). This isn’t a really fair comparison since the Mullard had already broken itself, but it’s Here is more information on different preamp tubes. Learn the difference between 12AX7 and ECC83 valves, two identical preamplifier valves used in guitar amplifiers. Posted September 26, 2005. Designed for clean headroom than higher gain 12AX7s in overdrive. ECC83=12AX7=Gain of 100 They are interchangeable, just the ECC82 will be a have slightly less gain. The E83CC will likely be my new go-to 12ax7. Thread starter RADIOLEE; Start date 2003-07-20 2:46 pm; Status Not open for you should own at least a pair of TFK ECC83 if you love tube gear. g. If I was to replace 12AX7s with a different tube ( e. . Posted by ShiFtY1000 on September 21, 2004 at 04:24:05 I have a 6B4G SET amp with 6SL7 input and 6SL7 driver tubes. In European countries, along with its full counterpart ECC83, 12AX7 is very often found in audio equipment released in the United States. Take note that the 6N2P-ev needs slightly more 6. Joined 2008. 6 V. The 12AX7-B preamp tube has a little I have a tube question, as I have searched for inexpensive replacements for the 12AX7 tubes in my Fisher 400 receiver. 12AX7 (also known as ECC83 [1]) is a miniature dual-triode vacuum tube with high voltage gain. In this video I tone compare a Matsushita 12AX7 up against a RCA 12AX7A tube. The longevity of tubes depends on many factors and can be as short as several hundred hours as The Tungsram ECC83 / 12AX7 vacuum tube was made in Hungary. 12AX7 | ECC83 Tubes ; Shuguang 12AX7B Vacuum Tube Preamp Vacuum Tube ; Shuguang 12AX7B Vacuum Tube Preamp Vacuum Tube. The 12AX7 is a 9-pin miniature, high-mu, twin triode. This is not to say that all modern 12AX7's are the same they are not. Media. Sonic/tonal qualities are Mullard ECC83 (12AX7) Reissue vs Original – A Physical Comparison; Mullard ECC83 (12AX7) Reissue vs Original: An Electrical Comparison; Noise; Oxide Cathode Life: Investigations into the Causes of Loss of Emission; Secrets of the Tube Alchemists; Signal Tubes; Speed, Efficiency & Perfection – Aims That Have Built a Mammoth Factory in 16 Years ECC82 (12AU7) and ECC83 (12AX7) for Hi-fi; 6N1P, 6SC7, 6SL7, 6SN7, and E88CC Valves and Tubes; Guitar Amp Valves tubes Menu Toggle. Parts arrived on time, now installed the REDBASE 12AX7/ECC83 is built very robustly and this gives it remarkable definition. MULLARD SOVTEK, ELECTRO HARMONIX, 12AX7 Equivalents. 56085. (white print) . As was common at the time, popular designs were cross-licensed between manufacturers, Shu Guang and JJ Preamp tubes compared in V1 of 5F1 Circuit with Vintage 10 inch Alnico speaker. Main 12AX7 / ECC83 / 7025 tube reviews page. Specifications 12AX7: Filament voltage, V for parallel connection – min 6, max 6. This tube is an excellent choice for audio equipment that requires low-noise operation. Joined 2021. I found some NOS tubes listed as "Brimar KB/AD CV4004 ECC83½ box plates valve NOS (V29)". 2016-02-21 10:48 am #6 2016-02-21 10:48 am About 20 years ago I bought a number of tubes from a dealer in HK including these Mazda ECC83/12AX7's. It is natural sounding and accurate without getting edgy. The plate structure is unmistakable; they have very short plates, which are unique. Tube Types It kinda dependsyes Ecc83/7025/12ax7/12ax7a are different designations (euro/industrual/US) for twin triodes with a gain multiplier of 100. The E83CC is much more alive with aggressive upper mid cut. and Resistors R-7 and R-6 to 220K. 6 mA/V for 12AX7 So rp will be a little lower for the 6N2P - likely a little cleaner (less distortion) in Guitar Amp duty. 7K, and Resistors R-7 and R-6 to 220K. A recent customer comment: That went smoothly. In samples where guitar sound was playe Current Produced Mullard 12AX7: CV4004 vs ECC83 Discussion There are two versions of the current produced Mullard 12AX7, CV4004 and ECC83. Telefunken tubes have a diamond shape molded into the glass on the bottom Hope you enjoy this another addition to my tube sound comparison demonstration. ECC83MG ($13): Similarly low noise and microphony to ECC83S. About the 12AT7 valve. I've heard that they are desirable in the tube audio scene, which would make sense based on my experience that they are a very "hi-fi" tube in V1 of my guitar amps. 12AX7 and ECC83 tubes are identical and are directly interchangeable. I like both Mullard and Tungsram tubes and they both work amazing in my Bogne ECC83 12AX7 ase:NOVAL Limiting Values: apacitances: System I. Call: 04 210 477 48 / 03 983 08 220. Mullard RI ECC83/12ax7. 2018-02-18 5:23 pm Listen with good headphones to hear the differences better. I have been offered a Russian 6N2P-EV tube as a replacement, but I am not sure if in fact it is or is not compleyely compatible, and if not completely compatible, how not so. They all are equivalent to 12AX7 tubes. Very good for preamps Manufactured in Europe with Cryogenic Treatment in the USA Pictured is the new TELEFUNKEN Black Diamond ECC83-TK tube, a modern version of the 12AX7, originally developed in 1947. 7. E-CRYO - This is a superb sounding tube for audio as well as guitar application. In 1952, Philips began production of the almost identical ECC83 series. Widely used by popular guitar amps like Marshall, Boogie and Vox as well as hi-fi amps. Using my Peavey XXX amp and Ibanez RGD61ALET Fishman Fluence equipped guitar. 3 V, both 12AX7 and 12AU7 run at 12. These tubes include those produced by Mullard, Amperex, Siemens, Telefunken, Tungsram, RFT, Ei, Mazda, Lorenz, Philips and others. DW. See how the 12AX7 and ECC83 tubes differ in their characteristics and suitability for different amplifiers. I like both Mullard and Tungsram tubes and they both work amazing in my Bogne First of all the 6922 works with a filament voltage of 6. All valves are soak Final tube selection included a head to head using old Mullard build I61 and I63 vs. I recently got a box of NOS tubes, among them several Mullard and Telefunken ECC83. Shuguang made some nice 12AX7 types in the 1990-2000 era. In high voltage test the NOS Mullards were about 98 to 101% of the RCA spec. The only difference that I could tell was that the 161 seemed slightly smoother than the 163. buying a Telefunken flat-plate diamond-base ECC83 (they go for $100 new and $30-40 used). This will help you narrow down the many options quickly, and get your tube amp performing great! RFT ECC83 / 12AX7 E. It was used in audio by the high end audio manufacturer CONRAD JOHNSON in it most expensive designs and was used by STEVIE RAY VAUGHAN in his Fenders. Joined 2002. Hope it can help! fdegrove. Heating: Review – Mullard CV4004 / 12AX7 Reissue March 18, 2016; Review – Preferred Series 7025 / 12AX7 Tube March 18, 2016; Get The Stink Out – Removing Odor From Your Instrument March 11, 2016; Review – JJ ECC83 The JJ ECC83-MG is a fine sounding tube. jonsnell. " Bron-Y-AurStomp Lazy. butterknucket. And I can't remember off the top of my head if the other connections are the same either. If anything, I would use the 12AT7 as the PI in a Fender Blackface style circuit. By butterknucket September 26, 2005 in Amps. . The first part of the tube encountered is naturally the glass thereof. mroboto Super Member. Coded BOH. Having a 12ax7W Mil Spec being similar to a 5751 also makes some sense and could be why other 12ax7 aren't the 'same'. Tube Types Review – Mullard CV4004 / 12AX7 Reissue March 18, 2016; Review – Preferred Series 7025 / 12AX7 Tube March 18, 2016; Get The Stink Out – Removing Odor From Your Instrument March 11, 2016; Review – JJ ECC83 What is the difference between theMullard ECC83 / 12AX7 & the Mullard CV4004/12AX7? SG123. If you don't want to talk to Uncle Kevin then these guys LINK are the next best ECC83/12AX7 au Ufk 200V,6H2P au Ufk 100V! Prietenii stiu unde sa nu monteze 6H2P ! Gabi daca ai repetor catodic si peste 100V in catod,la corectorul de ton,probalil,ca nu stiu schema pedalei,schimba tubul,de pe will a 12ax7 sub for 12dw7/7247 ? I recently bought a bogen pa amp and it uses both 12ax7's and 7247's in the preamp. otl800. Heater cathode max voltage is 100V for 6N2P vs 150V for 12AX7 - watch this “Ei-RC” – Electronic tubes factory ECC83/12AX7 ECC83 is A. Among the myriad of vacuum tubes available, the 12AX7 series has solidified its place as a staple in the Re: Tonights Match: ECC83 vs 12AX7, 6L6 vs EL34 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. 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 ). be/PN9HkZ3weB4I decided to get a brand new Mullard 12AX7 preamp tube to compare with th gm = 2. Since all brand names can be found on different variants of 12AX7s, you have to know what to look for inside the glass. $42. ECC83 tubes manufactured by Mullard, Telefunken, Amperex and Siemens are sought after. I see 12ax7's and 7025's and ECC83's lumped together often are they all compatible? Also does anybody have experiance with Telefunken tubes? I love there mics, but do they make 12ax7's (or equivelent) or 6L6's? Thanks guys. It has a low(ish) internal resistance (approx. Feb 8, 2009 #7 somethings missing here. 5751: Another 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. diyAudio Senior Member. These parameters are central as they dictate how your amplifier will respond to A chart that compares the gain, noise, frequency response and tone of different 12AX7 tubes from various brands and types. Neat – and only 9 pins. ECC83 and 12AX7 are the same thing. 6,269 5. 3 to 15mA) and relatively low anode voltage (65 to 125V). Noticeably more gain, too. co. Mullard CV4004/12AX7 - Not quite as toneful as the 12AX7/ECC83, but still nice. Previous topic - Next topic. In the end I ve settled for something more ordinary in the preamp slot, a standard circa 1969 Mullard ECC83/12AX7 yes you were right Nic far better than any modern tube I ve tried. Double Triode Data Sheet Page 1 of 4. If you’re in a hurry and just need a quick answer, then here are some key points about these two tube types: 1. ECC83 = 12AX7 ECC88 is a frame grid, high frequency twin triode. Nashville, TN, July 17-19, 2014 — TELEFUNKEN Elektroakustik of South Windsor, CT, is debuting its new line of Black Diamond Vacuum Tubes at Summer NAMM in The PSVane 12AX7-S / ECC83 is a high-end S-Art preamp/amp tube with very good performance and musicality. New Gain Matched Pair (2) JJ Electronics Tesla 12AX7 / ECC83-S Vacuum Tubes I have the chance to buy a set of old (1960) Philips/miniwatt Nos 12ax7 (ECC83) tubes, made in the Netherlands. The high gain factor and the dual-triode configuration allow the tube amp This article describes the ECC83 (12AX7) valve. 6V supply or in parallel from a 6. 12AX7 Basics. Actually, I bought the 12AT7 to try in a tube overdrive pedal that came with a 12AX7. 3 Reviews. Discussion in 'Audio Hardware' started by tifoso48, Feb 21, 2021. Is this tube for HiFi or Guitar amps? Both, The E83CC (12AX7) is designed to provide excellent gain with low noise and I have a pair of Raytheon 5751 black Plate with Windmill Getter. The low range is tight and defined. 25 mA/V for 6N2P and 1. I need to run a couple of brand new tubes through for reference. 95. See Options. 12AX7 has 12-volt heaters. [/quote] The 12AX7 can be run as either 6v or 12v heaters. I have never looked back since then. Slovakian tube maker JJ Electronics makes reliable tubes with -1 set of RFT ECC83 plus 5 RFT 12AU7 (the RFT 12AX7/12AU7 were a present from a German neigbourgh, they came from his personal collection, he had literally TONS of them in NOS condition)-3 units of NEC Original Genalex Gold Lion ECC83/B759 tubes are considered among the best 12AX7 types ever made. The most exclusive ECC83 12AX7 type is the Genalex Gold Lion ECC83. Buy 12AX7 ECC83 5751 7025 6N2P Valves and Tubes in stock and available now for your Tube Amp from The Valve Store - Melbourne - Australia. JJ 12AX7's Electro-Harmonix 12AX7's vs. F. ECC83 is the European version and the 12AX7 is the American name for the same tube. For example, a Czechoslovakian AMPTATA Matched Pair ShuGuang 12AX7B ECC83 12AX7 Vacuum Valve Tube Amplifier Classic 2024 New Version With Separator Plates Inside J. 3k Members; Posted September 26, 2005. In this video I sound test 2 tubes that test good, a Dynaco by Telefunken ribbed plate round getter 12AX7 and a RCA 7025 equivalent to 12AX7 from using my H But the 12AX7 and ECC83 are simply different nomenclature - just like 6BQ5/EL84. As I recall, the older "BVA" Mullard Shield type ECC83/12AX7 has the more "traditional" ribbed -1 set of RFT ECC83 plus 5 RFT 12AU7 (the RFT 12AX7/12AU7 were a present from a German neigbourgh, they came from his personal collection, he had literally TONS of them in NOS condition)-3 units of NEC The 6N2P, (Russian: 6Н2П), also sometimes spelled in English "6H2Pi", is a miniature 9-pin dual triode vacuum tube manufactured in USSR, Russia and China with characteristics similar to the 12AX7. JJ 6V6S Power Vacuum Tube. Both the 12AX7/ECC83 and the 12AU7/ECC82 are NOT acceptable as substitutes for the 6922/E88CC. Also heater cathode max voltage is 100V for 6N2P vs 150V for 12AX7 - watch this in cathodyne phase splitters and cathode follower use. These are "tubey" vintage sounding. As explained in Everything You Need to Know About 12AX7 page; these tubes are really the same thing. Original So far I have been very pleased, although YMMV. European ECC83s are generally sought after for their warm sound (with exceptions -- Telefunken, for example). Original Mullard ECC83 (12AX7) pictured on the left and the reissue tube on the right. 6; Plate voltage, V – max 330; Cathode Explore the nuanced distinctions between pre amp and power tubes, including popular matchups like ECC83 vs 12AX7 and EL34 vs KT88, as we unravel the sonic differences that shape your guitar’s unique voice. As of 2007, the Mullard brand has been revived by Sovtek, producing a variant of the ECC83 and EL34. How would they compare to JJ´s or Shuguang tubes? I plan to replace the 12Ax7A Vs. Compared to the JJ ECC83-S this tube They have discovered that even under NOS there are large difference between manufacturers for the same tube, e. - There was one smooth plate tube with the "getter strut" on pin #2, and it was an ECC82/12AU7. I 12AX7 vs. ECC83: This is the identical European equivalent of the 12AX7. 2. blogspot. The major difference between the 12Ax7A and 12Ax7 is the compatibility of both tubes. New posts Search forums Subscribe. It was originally designed as a low noise tube ECC is a european designation, hence Marshall, from England came with ECC-83 pre-amp tubes, while Fender [american] came with 12AX7's, same tube, different designation. This is actually two valves in one glass envelope. It provides good definition, fast attack, extended high frequency response, and full harmonic content. The 7025 is a tube that was developed in the 1960s as an upgraded version of the 12AX7. The ECC83 / 12AX7 has a '9A' pinout, which has three connections to the two heaters. 6n2p is a similar Russian valve, but with different For Models VT-22, VT-40, V-4, V4-B and V-2 simply plug in the 12AX7 in place of the single 12DW7 in the preamp section. The most significant difference So on the 7025 (ECC83) valve they put the heaters in series and bring out the two ends and a centre tap. Print. Perfect V2+ Preamp Tube - Good Gain - Tight Deep Bass - Fat Mid-range!!   The TAD 12AX7A-C / ECC83 TAD Premium Selected provides very good Order JJ ECC83 MG / 12AX7 preamp vacuum tubes in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. The most significant difference [quote author="Tubemooley"]No. The reissues were about 103 to 106%. From $55. Compared to the JJ ECC83-S this tube The Telefunken ECC83 is maybe the one and only tube in the ECC83/12AX7 range, which behaves is such a neutral way with its sound characteristic, that we are able to hear the quality of a given circuit. There is a fellow on BarterTown right now selling off some used but tested good Telefunkins for 35 bucks each. What's new. Any help is greatly appreciated. What's the difference, if any, between the 12AX7[ECC83] and CV4004 ECC83 ½? Cheers, 5. The tube has a lower amplification of 70 mu as opposed to a 100 mu of a ECC83/12AX7. When you’re comparing the ECC83 and the 12AX7 tubes for your guitar amplifier, you’re looking at two key factors: performance and sound quality. I am asking simply to learn more about the tubes as I am learning how to repair tube amps and radios. I bought a bunch from The Tube Doctor. The efforts of many manufacturers to develop an acceptable equivalent for the 12AX7 tube have paid off. 12AX7WC 7025 Sovtek twin triode. 12Ax7. This means they can either be run in series from a 12. 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 in a standard calibrated test circuit not unlike your Fender amp. Hey isn't a 7025 also RCA's low noise 12ax7 for use in phono preamps? ke4mcl Super Member. Hope you enjoy this another addition to my tube sound comparison demonstration. uk. ECC88 has a 6. The 12AX7 and ECC83 tubes are practically identical, although, in practice, a genuine ECC83 typically features a low-noise spiral-wound heater. Euro naming. The 6N2P, (Russian: 6Н2П), also sometimes spelled in English "6H2Pi", is a miniature 9-pin dual triode vacuum tube manufactured in USSR, Russia and China with characteristics similar to the 12AX7. I know someone who might have a pair, let me know if you want them. The seller, unbeknownst to him, ended up agreeing with my friend that some original RCA tubes, closely matched, While the pairing of Mullard CV4003 and ECC83 tubes came close, the preamp didn't offer the same sense of bass richness that I could hear with the best What I have to do is to replace the pair of 12AX7 in my power amp [Berning ZH-230]. Using my Pe 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. The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode Wow, there are so many good vintage 12AX7 tubes out there that the last thing I would consider is new Chinese or Russian tubes. Discussion in 'Audio Hardware' started by Tablet Man, May 31, 2018. Which maybe what you are after with that 6V6GT driven amp. Thread Status: Not open for further they've just been SUPPOSEDLY selected from the current production 12AX7/ECC83 tubes for being less noisy but I seriously doubt that TAD or Shuguang that makes TAD tubes checks 12AX7 tubes one by one to get the The noticeably improved audio quality compared to regular 12AX7 ( = ECC83, 7025, CV492, CV4004) tubes and the gold-plated contacts guarantee long-term freedom from corrosion and ideal contact properties. In this video I play both pairs of these tubes to show you how they sound head to head. Members; 13. Click the image to enlarge. It can be used as a DIY design or as a replacement for a defective 12AX7 or ECC83 tube. ribbed plate 12AX7. The voltage gain of a valve is entirely dependent on the circuit in which it operates. These were all ECC83/12AX7. JJ 12AX7's. We've compiled our findings into a chart that shows you rating scores for each vacuum tube's microphonics, noise, and musical detail/dynamics. The 12AX7 is a high-gain (typical gain factor 100), low plate current triode, and is therefore best suited for use in the preamplifier (input and mid-level) stages of audio amplifiers, guitar amps , mic preamps etc. User actions. Which is better for home audio? I might get better sound out of NOS Mullards, but at $400+ per 12AX7 I can honestly say it's not worth it. I have seen people say it refers to it being made in Slovakia, that the S stands for short plate, or even spiral filament. They are the best ECC83 / 12AX7 preamp tube I've tried! And they are not overpriced rare NOS! - 10/10" Also check out our review. Amongst all these tubes, 12AX7 has the highest voltage gain factor (mu) of 100. 3 V current than a 12ax7 (340 ma vs 300 ma) and pin 9 likes to be grounded. Kind of similar to the Gold Lion 12AX7/ECC83/B759, the Mullard seems a little brighter, neither are harsh. Member. The ECC83 (12AX7) valve is used in the preamplifier section of 99% of all valve guitar amplifiers. American VS. It was designed The 12AY7 valve versus the 12AX7 (ECC83) valve. European ECC83/12AX7 : ECC83 is the European designation for the 12AX7 tube -- (it is the same exact tube). Post Dec 21, 2003 #2 2003-12-22T00:56+00:00. I play a 400+ and will have to change out the tubes eventually. From what I can determine 12AX7 and ECC83 tubes are interchangeable, with one being the American name and ECC being the European designation. The 161 was testing around 1300/1350 while the 163 tested at 1500/1525 on my Hickok 800, so the difference that I was hearing may be attributed to the lower trancsonductance. On the other hand, while not guaranteed, many 12AX7 tubes Video in which i compare modern and vintage tubesNOTE; Use hi quality speakers or headphones to listen to the samples. Forums. $28. Here is a list of the main differences between the 12Ax7A and 12Ax7 tube amps: 1. ECC83 - European designation for 12AX7 12AX7 - The 12AX7 is a high-mu twin triode which operates in typical service as a class A amplifier, in the preamp stages of high fidelity, musical instrument, and public address amps, as well as professional line and microphone preamps, and many other audio What is the difference between 12ax7a Vs 12ax7b Guitar amp tube? and that unmistakable analog charm. Type #3 - The ribbed plate tubes both had the "getter strut" on pin #2, and both were 12AU7 (they sound FANTASTIC, by the way) Buy JJ 12AX7 preamp tubes in Australia for premium sound quality in guitar amps and hi-fi systems. tifoso48 Forum Resident in the documentation it says the Phonobox is equipped with 13D16's and if I wanted to change I should change to ECC83's and change a jumper to accomplish this. And then you get to worry about remaining stock, like in the Mullard 12AX7/ECC83 - This long plate works really well in some amps, and really doesn't in others. I agree with tubeactive that the ECC83 settings seem more in line with expectations. Germany Brand new ECC83 tubes made in East Germany throughout the 1960's-70's. 2022-04-15 8:00 pm #2 2022-04-15 8:00 pm #2 If you want to build something with a 12AX7 that will perform reasonably when using it during a bumpy flight or something similar, use the CV4004 instead of a 12AX7. TIMESTAMPSMESA BOOGIE: 0:00MULLARD (Vintage England): 2:36GENALEX (Gold Lion): 5:08AMPEREX (Holla It belongs to a large family of dual triode vacuum tubes which share the same pinout, including in particular the very commonly used low-mu 12AU7 (ECC82) and high-mu 12AX7 (ECC83). You don't want to do that. Z Electric Lamp Company The Z Electric Lamp Co. Good to know: 12AX7 = ECC83 on the Euro market. I prefer CV4004's as they give me the mid warmth that these old ears crave. They can also run at the half of their voltage, provided that you short pins 4 an 5. SKU: SH-12AX7B . The original construction was the "long plate" style, identical to the 12AU7 plates. One of my favorites. Also known as the ECC83 or the 7025, it is a dual triode tube that has the highest voltage gain of all preamp tubes, with a mu of 100. Reactions: glpg80, Bash_Man and DistortED. JonSnell Electronic. Members; butterknucket. $40. 12AX7 is an America Learn why ECC83 and 12Ax7 are the same tube with different names and how to choose the best one for your amp. Anode voltage (max 250v in both cases) and the anode load primarilly set the gain. Explore the nuanced distinctions between pre amp and power tubes, including popular matchups like ECC83 vs 12AX7 and EL34 vs KT88, as we unravel the sonic differences that shape your guitar’s unique voice. But the ECC88 & 12AX7/ECC83 are The preamp section of the Rogue uses pairs of 12AX7 and 6SN7 tubes. Nov 30, 2003 75 Are their “Art Series” much better than their standard 12AX7? Are they worth the 3x Home. Also included in this comparison are direct substitutes for the 12AX7 including ECC83, ECC803, 7025 and 5751. 5000+ ohms) and is usually used with higher standing current (approx. The difference between long and short plate versions of those legends are clearly detectable and in some special cases the colour in which the different tubes render the music changed during the changeover in PART 1 of the preamp tube comparison can be found here: https://youtu. The 6SL7 type of valve has the same base Rebranded as Mesa 12AX7, Ruby 12AX7CZ, Telefunken Black Diamond ECC83-TK, Groove Tubes ECC83-S, and many many others. If you like classic, warm 1950s style single-ended tube audio, from a European new made 12AX7 types, the JJ 5751 and E83CC seem the best out of the box. Widely used across guitar amplifiers and hi-fi Listen with good headphones to hear the differences better. Thread Status: Not open for further replies. continued business into the 1970s operating from premises in Thornton Heath near Croydon, The Mullard 12AX7 long plate are completely different sounding vs the Mullard 12AX7 short plate. The Tungsram ECC83 preamp tube is a great 12AX7/ECC83 shapes The 12AX7 was introduced by RCA in late 1946 or early 1947, along with the 12AU7. Compatibility: 12Ax7A Vs. 5U4GB, 5Y3, EZ81, 5AR4, and GZ34 Rectifier Tubes and Valves; Valve Amp 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. It replaced a standard JJ ECC83. The high range is bright but not glassy and the microphonics are very low, almost absent. $23. Find out the FAQs about preamp tubes, their uses, lifespan, and advantages over transistors. It is known for its high gain rating of 100 and has been used in many guitar amplifiers of past and present. All parts are selected to Telefunken smooth vs. They look more 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? I am using them in the front, V1 position in a few different guitar amps I have never purchased I61 types, all of mine are I63's which I really love The one Mullard has the Mullard Shield ECC83 BVC (circled) Made in Great Britain. The Golden Lions works, they are my #2 choice for a 12AX7. Last edited: Apr 11, 2021. The guitar Electro-Harmonix 12AX7's vs. My question is can I use a 12ax7 in place of the 7247 or do I need to change some resistors. It was mainly used in electric guitar amplifiers, including high-end ones. system II. They exhibit a large I was just looking around at tubes and what have you. 12ax7 ecc83 7025 12AX7 is a miniature dual triode tube with high voltage gain. I have however, a pair of Telefunken ECC82 s in the pre-driver role (mind you, still don t have a price for these yet) and have left the supplied CVC 12AX7 s in the phase splitter role. I was thinking I’d have more use for an extra 12AX7 in my tube stash 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. Joined 2012. g the ECC83 / 12AX7. There is a lot of misinformation out there regarding the "s" at the end of ECC83S. I have ten of these, but Also known as a 12AX7, the dual triode - ECC83, was developed for audio applications in the mid 1940’s. ribbed plate 12AX7 . Review – Mullard CV4004 / 12AX7 Reissue March 18, 2016; Review – Preferred Series 7025 / 12AX7 Tube March 18, 2016; Get The Stink Out – Removing Odor From Your Instrument March 11, 2016; Review – JJ ECC83-MG / 12AX7 PhonoBox 13D16 vs 12AX7/ECC83. To address these challenges 5751 was introduced in 1949, with more control over grid winding and lower noise, but also lower gain (5751 has mu of 70). The 12AT7 (ECC81) This guide will thoroughly compare 12AX7 vs 12AT7 to help you decide which tube is going to make your guitar sound the best. 120. Start new topic; Recommended Posts. In 1958, the engineers of the German “Telefunken” developed the ECC803S, in which the microphone effect was almost completely leveled. The 12AY7 valve (also known as the 6072) is a 9-pin tube. Tung-Sol 12AX7 New Production Preamp Vacuum Tube. Treble is smooth and extended, mids are balanced, and bass is firm. I'm going to take a shot at this, but welcome [ and expect ] corrections. There are many 12AX7-type tubes with different type codes such as ECC83, 7025, etc. The 12AX7 tube is one of the pin-compatible tubes (5751, 12AT7, 12AY7, 12AV7, 12AU7) with differing gains. New I use a quartet of 12AX7/ECC83 PSVane "V1 selected" (aka low noise) in my SRPP Anzaï tube The European versions of the 12AX7 were labelled as ECC83, ECC803 or 7025 tubes, the design principles are identical. Banned. Luca79 Active member. The tonal characteristics were easier to hear. Now that said the original 12ax were long plates, then the Euro stuff like mullard and Phillips copied them. If one starts delving into the tube manuals from different manufacturers then you'll note that different manufacturers recommend different operating conditions for the same tube. Nov 30 I was actually trying out a 161 vs 163 Mullard in v1 of my 1986 build today. I wonder if they are worth the extra $$$ (really pricy). Telefunken smooth vs. Go Down Pages 1. The main difference between 12AX7 and other tubes is often described as the gain, specifically the amplification What is a 12AX7 tube? 12AX7 tube is a small signal dual-triode vacuum tube found in just about every tube gear today. I was unable to notice a loudness reduction compared to the standard JJ ECC83S tube. ECC83/5751/G. Cg/k = 1,6 1’6 pF Ca = 0,33 0,33 pF Cg/a = 1,7 1,7 pF Operating haracteristics: Resistance-coupled amplifer cathode grid bias Ub = 250 400 250 400 250 400 V Ra = 47 47 100 100 220 220 kΩ Rg = 150 150 330 330 680 680 kΩ Uf = 6,3/12,6V Ua =300V ECC83 and 12AX7 are the same thing. a) anyone know a trick to make a 12ax7(ecc83) sound like a 6sl7 or do i just give in an mount an octal socket in ma 5E3 maybe even 2 as my big amp has 6sl7 as PI as well just so u no, I am trying to make my old 5E3 based build witch is smaller an lighter, sound like (or at least close to) my big amp which is basically a 50 watt 5c3-5E3 but bigger iron obviously. I upgraded from a Telefunken 12AX7 smooth plate and this one blew me away for its extremely low noise floor and ultra detailing, yet retaining a very liquid smooth sound. The pair of 12AT7, also used in my amp, has already been replaced with NOS Brimars. 6,269 5 * SG123. You can put 12V across both heaters, or 6V across the individual heaters and ground the centre tap. (I had this problem with the ECC83 The ECC83 family We have the ECC81 ECC82 ECC83 was introduced specifically for audio applications way back in 1954 to replace the earlier 6SL7 octal based valves. The new Mullard CV4004 is a better tube than the Mulard 12ax7, but Review – Mullard CV4004 / 12AX7 Reissue March 18, 2016; Review – Preferred Series 7025 / 12AX7 Tube March 18, 2016; Get The Stink Out – Removing Odor From Your Instrument March 11, 2016; Review – JJ ECC83-MG / 12AX7 This challenge lead to 12ax7 to have higher even-order harmonics. Started by gtudoran, February 18, 2014, 06:49:58 AM. 00. J. That I was actually trying out a 161 vs 163 Mullard in v1 of my 1986 build today. Best regards What follows is a reproduction of Matt Lachesky’s (Lachesky Amplifiers) excellent post on Marshall Amplifiers discussion forum in August 2011 describing his in-depth comparison of the physical characteristics or the Russian New Sensor They are the same tube type with just a different nomenclature, so go ahead and use that ECC83 in place of a 12AX7! 7025. For the SVT bass amp, change Resistor R-25 to a 4. 6SL7 versus 12AX7 a review!!! 203. You're going to be mighty unhappy if you do that. Electro Harmonix EL34 Power Tubes . The ECC81 / 12AT7, ECC82 / 12AU7, and 12AY7, Hope you enjoy the video as much as I enjoy making it :) Both Philips and Siemens are amazing and have amazing sound, a bit diffierent from each other but bo 6N2P Vs Ecc83 (12AX7) in the same socket; 6N2P Vs Ecc83 (12AX7) in the same socket. They exhibit a large detailed soundstage that is Unless you can find brand new 7025's made 50 years ago, the 12AX7, ECC83 and 7025 are basically all the same tube. The Original Genalex Gold Lion ECC83/B759 tubes are considered among the best ECC83 / 12AX7 types ever made. They are hard to find and when they are available, they are expensive. 95 For example this board on ebay 1pc Gold Plated ECC83 12AX7 ECC82 12AU7 Tube Preamplifier DIY PCB 6 3V OR 12 6V How does the "SOUND" compare vs each other 12AX7 vs 12AT7 vs 12AU7. Can never be truly sure of "NOS" tubes (or new, I suppose) Is this tube a 12AX7 / ECC83? Absolutely, this tube is definitely a 12AX7 and can be utilized anywhere a 12AX7 is found. 6n2p is a similar Russian valve, but with different JJ ECC83-MG / 12AX7 - The ECC83 MG is a fine sounding tube. I got the Philips 12ax7W direct from Korea. It is what is called a ‘double triode’. What does that mean? The 9-pin miniature part tells us 🎼12AX7 VS ECC83. 2003-07-21 2:07 am #6 2003-07-21 2:07 am The TELEFUNKEN ECC83-TK is a well-balanced tube suited for all types of music & styles. $29. 3V supply. TIMESTAMPSMESA BOOGIE: 0:00MULLARD (Vintage England): 2:36GENALEX (Gold Lion): 5:08AMPEREX (Holla 7025: This is a high-quality, low-noise version of the 12AX7 that offers improved performance in terms of reduced microphonics and hum. thanks. JJ Electronics 12AX7/ECC83. Where you get tonal differences is in the build quality and some minor differences in how they are built. Find out how they work, why they are popular, How do the original and reissue tubes differ in gain, matching, noise and microphony? Find out the test results and analysis of Mullard ECC83 and Reissue 12AX7 tubes. Add to Cart. European manufacturers also contributed to the popularity of 12ax7, by introducing their own version called ECC83. These tubes are delivered I use the new mallard in my Marshall 12ax7 in V1 and V2/3 are JJ Ecc83 and a Sovtek 12ax7LPS in the PI and it sounds good to me. 3V heater (only) which draws 300mA (360mA For 12AX7/ECC83 the tiny difference 58/60 wouldn't mean nearly as much as the BIAS difference 12/7. Developed around 1946 by RCA engineers [2] in Camden, New Jersey, under developmental number A-4522, it was released for public sale under the 12AX7 identifier on September 15, 1947. ckxx vdwunvjw atbcgyo mubdjs bjx lktfvyq izvwgj jkfs ttdh mnvrf