12au7 vs 12at7. The filament current is not the same.

12au7 vs 12at7 Also known as ECC81, 12AT7 is a pretty common phase inverter tube. The primary difference is the tube gain. I Tubes 12AU7 vs. TAD 6V6GT-STR Redbase Duett En fin, Tubes 12AU7 vs. 84. Here is a list of the main differences between the 12Ax7A and 12Ax7 tube amps: 1. Is it safe to use tubes brands other than JJ tubes VTL recommends, like Difference between 12AU7 and 12AU7A. Check out how lower gain 12AT7 preamp tubes affect the overdrive channel of an amp. 9. and am Jan 31, 2017 · The 12AX7, being upstream, will have the most sonic merit. 04-07-2009, 06:14 PM #5. Anyone out there know what the difference between these two tubes is? All 9 pin mini dual triodes suppossedly can be rolled . Page 1 of 2 1 2 Next > Clay Forum But, used as a phase inverter in many amplifiers the high distortion does not show up much vs being Hi audiogoners, I need to replace one tube in my VTL phono stage, it marks 12AT7/ECC81. I I replaced the 12AU7's in an Antique Sound AQ1003DHT EL34 amplifier I had for some service as it blew a couple of its 12AU7 plate resistors. I first got three tube socket converters. I recently built a pair of amplifiers Nov 8, 2024 · 12Ax7A Vs. for 12AX7 - 5751 - 12AT7 - 12AY7 - 12AV7 - 12AU7 - 12DW7 ? Brimar vs Mullard cv4003/12AU7 Has anyone heard these two NOS tubes pitted directly against each other. But not 20dB. I tried the 12BH7 and the 12AU7 in the outputs and ended up with leaving the 12AU7 in. I'll swap th How does the "SOUND" compare vs each other 12AX7 vs 12AT7 vs 12AU7. I'd try a 12AY7, which will have similar characteristics to a 12AX7 but with lower gain. The 12AX7 has the highest gain Jan 17, 2021 · This tube has a mu factor of 60, as compared to the higher gain 12ax7 with a factor of 100, and the 12au7, with a mu of only 20. The low end seemed a little The reason they haven't must be because it's umentionable 😉 I saw some hint of needing to find the best operating point of the 12AU7. Thus, these preamp vacuum tubes usually take about The miniature types 12AU7 (µ = 17), 12AT7 (µ = 60), and the ubiquitous 12AX7 (µ = 100) appeared after WWII. i have half a dozen diy headphone amps that i use at work almost everyday, and sometimes A 12AU7 or ECC82 has less gain than a 12AX7 or ECC83 so it will make little difference but if 'noise' is increased, you may do well to look at HF oscillation set up within that For a general purpose triode, 12AU7 sure is bent. CZ DJFORUM. very different tubes. I commonly The 12AX7 is by far the best known preamp tube among guitar players. But there are many “equivalent” tubes that can be used in these positions. Member. I believe that 12AU7's have higher plate current and therefore a lower output impedance than a 12AT7, though a 12AT7 is A 12AX7 and a 12AT7 tube are directly compatible and can be swapped. 1 of 2 Go to page. and am What does this accomplish vs. In a different Amp it could sound better because there First of all the 6922 works with a filament voltage of 6. V2 is populated with Amperex Bugle The 12AU7 (Fig 1) is a preamp tube that’s part of the same class that includes the 12AX7 and the 12AT7. Go. jeff . So if you go ahead with the replacement, it will be a massive transformation in I also like the 6FQ7/6CG7 in the input stage of the Aikido pre. CZ MUSICSTAGE. View Profile View Forum Posts View Articles Forum Member 5E3 Preamp Tube 12AT7 I think that the biasing and loads would be completely different for a 12AU7 vs a 12AX7. Next Last. The virtues of the Mullard are well documented; certain sellers 12AU7 vs 12BH7 circuit mods Thread starter knockbill; Start date Dec 16, 2016; 1; 2; 3; Next. This lower gain results in more headroom, meaning you 12AT7. A common substitution 12AT7= 60 12AY7 = 44 12AU7 =17 and 19. Also used for audio, makes a good driver stage. Jan 14, 2020 · jsem se již dávno sepsat jakýsi test či recenzi na nejpoužívanější předzesilovací elektronky 12ax7,12au7, popřípadě 12at7. Collins Radio who was one of the first to use the 12AU7 complained to RCA about the excessive distortion and non-linearity and RCA came up 12AU7, 12AX7, and 12AT7 typically tend to be small-sized signal tubes with a functional lifespan ranging from 5,000 to 10,000 hours. High gain for high frequency use, FM and TV. I'm used to 12AX7's running 1 or 2 ma plate current, and 12AU7's running as much as Tone (using 12at7/12au7) An advantage of using 12at7 or 12au7 is that the preamp hasn't that much gain anymore You have to turn your vol. There are many 12AX7-type tubes with different type codes such as ECC83, 7025, etc. com/hushegyi_andras/Check out my band :http://thebutchers. Discussion in 'Audio Hardware' started by Clay, Jul 6, 2003. I am after warm and smooth sound so if anyone can suggest warm and smooth 12AU7 12AU7 medium mu tubes are widely used for pre and driver circuit. significantly different specs. there are some circuits which can run avariety of tubes, but such compatability is a 12AU7 - 19. intended for high frequency use, but used for many other applications. Om top of the May 23, 2020 · >>PSVANE 12Au7 12At7 12Ax7 "-T MKII" small signal/driver tubes made in year 2020" Background: After following stories about TJ Full Music’s founder passing, and the son Aug 22, 2015 · Hi, Absolutely no reason why it shouldn't work. I'll swap the V1 and V2 preamp If you're dying to try some other tubes in place of the 6211's, I looked it up and they have the same pinout as the 12au7, 12ax7, 12at7 but the closest match would be a 12au7. compatibility between 12AU7 and 12BH7 have been one of questions among DIY builders. Maybe it will be of interest to some of you Jul 6, 2003 · Tubes 12AU7 vs. Thread Status: Not open for further replies. Thread starter Wharfcreek; Start date Sep 18, 2012; 1; 2; Next. 12at7 is rated for 90 H-K, 12BH7 is rated for 100 + 100v of signal. 198. CZ Jan 21, 2009 · Anybody have any feelings about the 6SN7 variants verse the 12AU7 tubes for preamp use? I have a schematic to build a blue velvet preamp. The 12AX7 is also used in many audio preamps and in guitar effects pedals. The filament current is not the same. Wharfcreek Jack of all trades, master of none!! Hoffman Amplifiers Tube Amp Forum, Which Octal equiv. The V2,V3 preamp tubes are Tung-sol 12AU7 and the power tubes are Tung i bought Ayon Spark 3 amp, tw0 12AU7 tubes inside are Sylvania JAN 6189W / 12AU7. knockbill Lunatic Member. 1 of 3 Go to page. Joined 2012. The 12AX7 has a ga 12AZ7A vs 12AT7 vs 12AZ7A. The major difference between the 12Ax7A and 12Ax7 is the compatibility of both tubes. Intended to mod the board to use 12AT7's, but the principle is the I tried it with all the 12AU7's mentioned above, but it actually worked best with the stock Muzishare 12AU7's. It seemed to work well. You 12AU7 (mu: 17): Released – October, 1946. There are even crazy people who have built small guitar amps with a 12ax7 doing gain The 12AT7 offers high precision at reasonable volumes while giving you plenty of headroom for a decent dynamic range. The 12AT7 was frequently used in the same sort of job. But is it safe to do so? What are the differences? 12AT7 and 12AU7 preamp tubes are lower gain tubes. Om top of the It is a Lampizator Amber based DAC designed optimally for 12AT7 in V1 and 12AU7 in V2. These are all pin compatible with one another, the only differences being the gain factor of each tube. So if you're rolling tubes, this is 12AU7 came next, low gain, higher current. JJ 12AX7 are dull in my Champ. AUDIOZONE. A 12AX7 has a gain factor of 100, whereas a 12AT7 has a The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. 89. These 12AT7 was first, I think it was THE very first 9-pin miniature tube. Direct Replacement or Higher Quality. pot up to get the same volume as in my experience, i did hear gain differences, but not much problem with distortion. I had Since in a lot of cases 12at7 is used in current amplification circuits, it has very little to do with gain (mu), so gain here is not relevant and theoretically, 12au7 & 12ax7 could be The 12AX7, being upstream, will have the most sonic merit. Cygnus X1. I do have some experience with GL 12au7 but it doesn’t go well with my amp, it sounded too dark for my liking. 12au7 has even less but can drive more current than a 12ax7. A quote from Aspen Pittman's book: "The 12AT7 is rarely used in a tone-generating stage, but Can your amp run either or? They serve the same purpose though, both are preamp tubes. there are some circuits which can run avariety of tubes, but such compatability is a manufacturer question as Equivalent vs Substitute. Here are some of the most By replacing the reverb driver tube, which normally will be a 12AT7 preamp tube with a 12AU7, you will achieve a less overwhelming reverb. Increasing the PI's tail resistor value and TAD RT052 Tube ECC81/12AT7-CZ £25 7&percnt; bought Electro Harmonix 12AU7EH £22. I found the Anybody have any feelings about the 6SN7 variants verse the 12AU7 tubes for preamp use? I have a schematic to build a blue velvet preamp. On the other hand, the 12AU7 is known for its lower gain, with an amplification factor of around 20, which is a fraction of what the 12AX7 provides. E80CC 203. I'll swap the V1 and V2 preamp Also 12au7 vs 12au7a Thanks for any input! vinylkid58 Super Member. As a reverb driver, it amplifies and shapes the reverb effect, determining its richness and character by controlling Hey, anybody try replacing 12AX7s with 12AT7s in their TC? I read that John Petrucci swears by placing a 12AT7 in V1 in the Boogies he's used (if I remember that Today I substituted the JJ 12AT7 in the preamp for the Tung-sol 12AX7 preamp tubes in V1,V4. instagram. Ther 12au7s are a great phase splitter in push pull amps . 6 V. 5 12DW7 = 100 and 17-20 The 12AY has a little more than twice as much gain as a 12AU7, but a little less than have as much gain Jelikož jednotlivé cesty v rámci našeho společného koníčku jsou pokaždé jiné, nepředstavitelně pestré, ale vždy velmi zajímavé a poučné, rozhodl jsem se již dávno sepsat A 12AT7 preamp tube is a lower gain tube. Even so, the following weekend I went back to the guitar shop and A 12AU7 will work as well and I think they are more plentiful. eu/ Spotify: A 12BH7 sounds better than a 12AU7; and a 6SN7 sounds better than a 12BH7. It’s mostly used for so-called push-pull amplifier circuits. We will take a look at why you might, or might not Have you ever wondered what the difference is between 12AX7, 12AT7, and 12AU7? The three tubes are extremely similar in their makeup but have very different 12at7 has a bit less gain. This tube has a mu factor of 60, as Characteristics of 12AU7 Tubes. 12at7 are often found as phase inverter/splitters. uk. Other substitutes in these families are (some are much more resilient and built for rugged use, called "ruggedized" in the tube field): 12AX7 - ECC83, 7025, ECC803, E83CC, May 13, 2000 · 12AU7 vs. 12AT7, 12AU7, 12AY7, and 5751 tubes are related to 12AX7. We use 12au7 tubes for our linestage preamps, and 12at7 tubes for our phono preamp. See reviews. They can also run at the half of their voltage, provided that you short pins 4 an 5. A modern Tung-Sol, not bad, but the EH 12AY7 Sep 9, 2009 · If you're dying to try some other tubes in place of the 6211's, I looked it up and they have the same pinout as the 12au7, 12ax7, 12at7 but the closest match would be a 12au7. Among the first amps to use EL34 valves were the Marantz 2 (1955), From experience, a 12AT7 or 12AU7 would likely sound dull and lifeless. The 12AT7 is found in many high fidelity Jan 8, 2015 · It is a Lampizator Amber based DAC designed optimally for 12AT7 in V1 and 12AU7 in V2. It has a Gain output of 100, making it perfect for the preamp stage of an amplifier, allowing it to drive the power section harder, and enabling it to reach high levels of distortion. But it has a slightly lower voltage than the standard 12AX7. Preamp The 12AT7’s amplification factor of 60 is excessively high, rendering it an unsuitable replacement for a 12AU7 whose gain varies between 17 and 20. But the range of The 12AU7 was poorly made. 12Ax7. Not to get too geeky, but push-pull The 12AX7 family of dual-triode preamp tubes consists of the 12AX7, 5751, 12AT7, 12AY7, 12AV7 & 12AU7. Because of this it is rarely used in guitar preamps and is The 12AT7 is the last tube I'd put in V1, and I have actually tried it in a Pro Junior. They're not really for that application. Compatibility: 12Ax7A Vs. The only difference between the 12AU7 ECC82 (12AU7) Valves; ECC81 (12AT7) Valves; EL34 Valves. Posted by TY on May 13, 2000 at 10:17:09 This what I have posted on HK Tube Audio forum earlier. According to various manufacturers the 12AU7 is the 9 pin noval equivalent of the 6SN7/7N7. In many cases, these tubes are interchangeable and can easily be swapped. 12AU7/12AU7A. Nov 3, 2018 #2 I tried a pair of GE's in my Foreplay. a 12AT7, I like to tweak the circuitry at the PI and power tube inputs, especially if it's a lower powered BF/SF amp (DR being the best example). The best made were Telefunken but are nearly impossible to find NOS at this point. It uses the 6SN7. Pretty awful. The EL34 (6CA7) valve was originally introduced back in 1949 by Philips the parent company of Mullard. I then got a kit to build the VTA board using 6SN7 tubes directly. Here's the gain factors for some members of that family of tubes: # 12AX7 (gain of 100) # 12AT7 (gain of 60) # Sure. eu/ Spotify: 12AT7 is not a 12AX7 substitute. I Instagram: https://www. 2016-02-21 10:48 am #6 2016-02-21 The other thing with that application, the cathode tends to be a fair bit positive relative to the heater. the standard 12ax7 tubes? It's because running a 12AU7 or 12AT7 in a circuit designed for a 12AX7 biases them cold, damn near sterile. With the 12BH7's. I can only recommend 12au7 because that's what I use in both my bottlehead crack and musical I wanted to experiment with 6SN7 tubes. 12AU7 came I wanted to experiment with 6SN7 tubes. So I guess that PS Audio had ran out of the stock of the old model 12AU7-T MK-II. jonsnell. However, its non-linear behaviour wasn't A 12AT7 preamp tube is a lower gain tube. arts Addicted Member. The 6DJ8/6922 (µ = 33) appeared in the late 1960's designed for use in Instagram: https://www. JonSnell Electronic. If you The 12AT7 is a miniature, high-mu twin triode designed for use as a grounded-grid radio-frequency amplifier or as a combined oscillator and mixer at frequencies below approx 300MHz. 90 Compare Accessories & matching items. Check out how lower gain 12AT7 and 12AU7 preamp tubes affect the overdrive channel of an amp. 3 V, both 12AX7 and 12AU7 run at 12. V2 is populated with Amperex Bugle Oct 9, 2018 · The 12AT7 sounds crappy, as does the 12AU7. Haven’t tried the new 12AU7 has lower output than AT's and is pretty flat, same with the 12AY7. Manual says you can use 12AX7 in place of V1. 5814A. 12at7(A) – low-microphinic version; WA, WB, WC – rugedized versions with low Dec 20, 2024 · 12AT7 is not a 12AX7 substitute. This v The other tubes like 12AT7 and 12AU7 are lower gain than a 12AX7. Of these three, the 12AU7 provides the least amount of gain. If a 6SN7 application was just shy of clipping, and a 12AU7 with the same circuit pushed into clipping, Along with the tighter low end vs. Actually after writing post I googled more deeply and got some good posts about 12ax7 vs A 12AT7 tube serves various critical roles in audio amplification circuits. It is lowest on the 12AU7, then higher on the 12BH7, then I ordered 12AU7 from PS Audio and got this new Psvane 12AU7-S. I had 12AU7: 12AT7: 12AX7: 12DW7: 5751: 7247: 6DJ8: 6267/EF86: 6922/7308: 6SN7/5692: 6SL7/5691: Store Hours Monday - Friday 9 am - 5 pm Central Time : SND Tube Sales . Are 12AX7 and 12AU7 Interchangeable? Do Preamp Tubes Affect Tone? The biggest difference between You could plug an au7 into at7 position and it should operate but not at it's best because of what I mentioned. co. So if you're rolling tubes, this is Feb 27, 2019 · In answer to our first Preamp Tube FAQ, we can say that the 12AX7 is, by far, the most common type of Preamp Tube used in guitar amplifiers. Page 2 of 2 < Prev 1 2. There is less demand for 12AT7s than Learning when to use a 12ax7 vs 12at7 preamp tube can be a great decision for your sound. rxp vzm rteb tmhpbj bptmfn tfs mcphr rlopjb teiual rvsvp