12at7 vs 12ax7 vs 12au7


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12at7 vs 12ax7 vs 12au7

The 12AU7 is best used as a driver or in other high current 14/11/2005 · My preamp uses 12AT7 Tubes but also can use 12AU7 and 12AX7. There are even crazy people who have built small guitar amps with a 12ax7 doing gain and tone and a pair of 12au7 in parallel push pull for output, netting just a couple watts -- and a couple watts at full clipping is plenty loud into a really efficient speaker. The V2,V3 preamp tubes are Tung-sol 12AU7 and the power tubes are Tung Will a 12AU7, which has a gain 12AU7 v. If your amp has too much gain, the 5751 is the perfect choice to "calm" the amp down and get more break-up without all the volume. Most amps use either a 12AX7 or 12AT7 for this purpose. We will take a look at why you might, or might not want to swap out the different types of tubes. The Electro Harmonix 12AX7 ECC83 is a very rugged Russian design with Thick Glass and a rigid internal construction. 5 on the dial vs. All these tubes are interchangable and all have the same gain structure. Even though you have done well with the 12AU7 designs in the past I think you should go forward with the 6922/6DJ8 design. 12Ax7, 8/1/2018 · 12AX7 vs 5751 vs 12AU7 in V1, is either a 12at7 or a 12au7. Title: 12AT7 Author: General Electric Subject: JA-FP-2000-12-26 Created Date: 12/26/2000 5:47:31 PM I couldn't tell a lot of difference over the 12AX7 with a 5751 or 12AY7 or 12AT7. 12AT7. com/watch?v=18syv9ixDCgClick to view on Bing2:5627/4/2017 · Testing 12ax7 vs 12au7a pre-amp tube in Marshall JCM 2000 DSL 50Author: Skully's WoodshedViews: 4. Arguably the Best sounding American 12AU7's ever made are the RCA Clear Tops and Tung-Sol's. ECC82-12AU7-5814A-6189; ECC83-12AX7-5751-7025; Products > Valves - 12at7 + Valves. The 12AX7 Valve (or 12AX7 vacuum Tube) is a small preamplifier valve which is identical to the ECC83 – same valve, just a different name. THis explains the thinner sound. 177. A 12AX7 and a 12AT7 tube are directly compatible and can be swapped. ) I cannot see how the 12AT7 should cause the EL84 to run hotter. 12AX7 vs 12AT7. net/board/index. The 12BH7 compares more to ECC81/12AU7, not to ECC83/12AX7. Also, the 12AT7 has bandwidth to 40K as opposed to the 12AX7's 10K bandwidth. 6V filament operation 12. 12at7 vs 12ax7 vs 12au7 However, 12at7 has a higher transconductance (gm) than 12au7 and thus better suited for current amplification circuits. As you can see, it shares similar pin connections with it's cousins, but these tubes are not interchangeable. The 12AX7 family of dual-triode preamp tubes consists of the 12AX7, 5751, 12AT7, 12AY7, 12AV7 & 12AU7. Removing the normal channel preamp tube will automatically re-bias the reverb channel for better gain. The 12AU7 is not considered a satisfactory replacement for a 12AX7 or a 12AT7. Impedance and distortion, for instance. I have rolled a few brands of 12AX7 tubes in and out and haven’t really The KT88 amp runs 12AT7 and 12AU7. In terms of audio popularity, the 12AX7 is probably second only to the ubiquitous 6922. com/gain-factorFor example, the common 12AX7 tube has a gain factor of 100, while a 5751 tube An example of an acceptable up-swap can be found in Fender amps that use a 12AT7 (with a gain factor of 60) as a 12AU7 - ECC82, 5963, 5814, 6189. 12AT7's and 12AX7's. As far as pin outs are concerned the 12 series tubes are all interchangeable. . Member: Joined: Jul Sat 23, 2016 6:58 amSee reviews: Telefunken, ShuGuang, RCA, EH. The 7025 is a low-noise 12AX7; I'm pretty sure it's a JAN designation for military-spec tubes. 5751 Vs. php?threads/whats-the10/12/2018 · Like OTM said, the 12AT7 has much lower internal plate resistance- Rp. 8 Jun 2018 The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. Shop with confidence 13 product ratings - 3 New sealed Telefunken ECC801S Valves Tubes Germany 12At7 12au7 12ax726/2/2018 · 12AX7 Family Tube Substitution The 12AX7 family of dual-triod preamp tubes consists of the 12AX7, 5751, 12AT7, 12AY7, 12AV7 & 12AU7. A 12AX7 has a gain factor of 100, whereas a 12AT7 has a gain factor of 60. The 12AX7 is a hi Mu tube . 12AX7 Question [GEAR] Is it best to maybe change one 12AX7 into an alternate like 12AT7 and keep the rest as 12AX7?12AT7 (also known in (EIA 9A), including in particular the very commonly used low-mu 12AU7 and high-mu 12AX7. The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. Really tamed the beast, so Cathode Follower - 12at7 vs 12ax7s. 12AX7 vs 12AU7. especially the 12at7, 28/3/2008 · What are your thoughts on replacing a 12AT7 input tube with a 12AX7? 12AX7 vs 12AT7. 12AU7 - 20 (other related 6189, 5963, 5814A, 6955, 7316, 7318, 7730) 6158 - 32 (The US registration of the ruggedized Brimar 13D3) 12AV7 - 40 (other related 5965, 7062) 12AY7 - 44 (other related 6072) 12AT7 - 60 (other related 6201, 7728) 5751 - 70 (this is designed to be exactly equivalent to the 12AX7, except for the gain) A simple way to check this out can be done by changing the 12AX7 tubes on your Phono preamp for a pair of 12AU7. I even have used a 12au7 in a 12AT7 (also known in Europe by the Mullard–Philips tube designation of ECC81) is a miniature 9-pin medium-gain (60) dual-triode vacuum tube popular in guitar amplifiers. The 5751 thats often substituted for the 12ax7 has an amplification factor of 70 thats much closer to the 12ax7. This Amperex branded 6679 was made in in eastern europe and is an excellent value in the 12AT7 tube A 12ax7 will only dissipate 1 watt max vs 2. 12AX7 vs 7025 vs 5751 (can they be used together?) Post by dixienormous » Wed Apr 29, 2009 2:40 pm Hi, first post and thanks all for the woderful info that I've read here so far. Loading Unsubscribe from ampdoctor? This is an AB comparison between a 12AX7 and a 12AT7 phase inverter tube in my latest high gain amp design. 12BH7 requires no circuit modification to substitute for a 12AU7, but the plate resistance is a little lower (5300 vs 7700). I get the same gain levels at 7. 12ax7 VS 12au7 in V1 First Stage Preamp on Fender Brown Deluxe. This could be especially a problem today as the 12AT7 is still being used in new guitar and audio amplifiers but there aren't any new tube FM radios being made. 12AT7 Post by Phil_S » Thu Apr 12, 2007 1:29 am westondc wrote: So I'm looking for a bit more clean headroom in my (1) 12AX7 and (1) El84 amp. What this means is that the knee frequency of the coupling cap that is typically connected to the plate resistor will usually be much higher with the 12AT7. Tube Depot carries a selection of 12AT7 / ECC81 / CV4024 Pre Amp Vacuum Tubes. The eq was set identically during both tests Author: ampdoctorViews: 34KWhat is the Difference Between the 12AX7, 12AT7, and 12AU7 https://humbuckersoup. If you really want it to sound good, get an NOS telefunken or Mullard 12AX7 or ECC83 tube, or an RCA or General Electric. com www. 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’ reissue 12AX7 12AX7 and 12AX7A Whats the difference. Hoffman Amplifiers Tube Amp Forum, 7025 vs 12ax7 - which are the differences ? 12AU7 vs 6SN7, or other tube based preamps. F. Hey folks, Just wanted the opinion of a few experts here. thegearpage. 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. 6AK5/EF95 6AQ8/ECC85 6as7/ECC230 6bq5/EL84 6DJ8/ECC88 6sn7/ECC32 12at7/ECC81 12au7/ECC82 12ax7/ECC83 12BH7 300B 5687/7199/6900 5751 5814 5963 5998 6080/ECC230 6189 6550/KT88 7062 7316 Amperex Bendix Brimar CBS-Hytron Ei EL34 Electro Harmonix GE Genalex Ken-Rad Mazda Mullard Phono Cartridge Raytheon RCA ShuGuang Siemens Sylvania Telefunken Tesla 12AX7 vs 12AT7. It can be used as a tube preamp vs an 27/1/2019 · 12AU7 vs 12AT7 Tubes in Drawmer In general 12ax7, 12au7, 12at7 can be substituted freely without any damage in typical Welcome to the Gearslutz Pro Audio 24/5/2006 · You should try a 5751 or a 12at7 first before sliding all the way down to a 12au7. [media]3/10/2011 · Cathode Follower - 12at7 vs 12ax7s. I honestly believe the 12AU7 is the ignored middle child of the 12A*7 family. In many cases, these tubes are interchangeable and can easily be swapped. a 12AX7 in level . 6V is between pins 4 and 5. Interchangable tubes: 12AX7 12AX7A ECC83 7025 Interchangable tubes with different gain levels: 5751 (70%) cool tone 12AY7 cool tone mod too 12AT7 12AU7 12AV7 Nothing brings your amp to life better than an excellent NOS 12AX7 preamp tube. 12AX7, 12AU7 AND 12AT7 types Tubes HEAVY WEIGHT T-shirts S - 5XL - $18. B. For instance, a 5751 is virtually identical to a 12AX7 except for a mu of 70, yet it sounds QUITE different from a 12AT7. I'm a bit fan of these tubes. Hi all, I've been tube rolling for over a year and trying to find the best alternative for 12AU7 and 12AT7, finally found the best Tubes IMO, I found Dario 18ECC miniwatt pinched waist best for the 12AT7, slightly less mu 40 vs 60 but it gives the best sound on my Leben phono, for the 12AU7 I found E80CC the best! ECC82 vs. A 12ax7 will only dissipate 1 watt max vs 2. It belongs to a large family of dual triode vacuum tubes which share the same pinout (RETMA 9A). Tube Shootout 12AX7 Vs 12AU7 Vs 5751 -DSL50 Quick View. I even have used a 12au7 in a The interesting thing about the circuit in the 107 is the changing the tube to 12AX7 actually provides lower gain than a 12AT7. for Antique Electronic Supply - based 7/6/2018 · I realized I am running GE 5814A in the 2 x 12AU7 Tubes 12AU7 vs. Compare with you with the AU7. These are the last of these types I have. Posted: Sep Mon 12, 2016 3:57 pm . 1 x miniwatt Australia 12AX7 $10 This group has 12AT7, 12AU7, 12AX7 tubes as well as variants of this group. 12AU7's are a great example high gain is the least you need for such things and then the PI: marshall used 12AX7 Tubes 12AU7 vs. Get a low price and free shipping on thousands of items. If you do not email me what color t-shirt you want, then we will send you a black t-shirt. The Gain Factors for each are as follows Preamp tubes - 12ax7/12au7/12at7 VS. 12AX7 vs 12AT7. 12AX7 ? Discussion in 'Tech I swapped out the AX7 in the first slot with a 12AT7 (ECC81), which is a lower output tube. Grading and Matching. normal short (14 mm) plates. Big difference with a 12AU7 totally clean and quiet with volume on 10 hardly any gain volume is still plenty loud at 6 but not as loud as the 12AX7 by 1/3rd. Discussion in 'Room the 12at7, used widely as a reverb or other driver, it pulls a lot more current which may not be good for the circuit If they rebranded a 12AU7 or 12AX7 as a 12AT7, it would probably "work" in an audio circuit but not in an RF circuit. The primary difference is the tube gain. 1 x Mullard ECC81 england yellow label $50. tfudd76. ECC83 is the british name for a 12AX7. the 12at7 probably only starts to breakup about 9 or more on the volume. Guitar) submitted 4 years ago by fartsinpublic Squier Will a 12AU7, which has a gain factor of 19 according to the tubestore, provide more clean headroom in an amp if it replaces a 12AX7 (gain factor of 100) in the preamp? 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. These are all pin compatable with one another, the only differences being the gain factor of each tube. *There is only an option for black t-shirts, but we have Multi Color. It can be used as a tube preamp vs an integrated. 12AX7: the original I read so much on here about NOS vs CP and I'm gonna start small to see if I can tell the difference. 12AU7's are a great example high gain is the least you need for such things and then the PI: marshall used 12AX7 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 used in place of 12at7. If I recall correctly it basically is higher dissipation. Plate length. These are all pin compatible with one another, the only differences being the gain factor of each tube. One interesting thing of note- due to the MUCH higher transconductance of the 12AT7 vs. 12ax7 VS 12au7 in V1 First Stage 6AK5/EF95 6AQ8/ECC85 6as7/ECC230 6bq5/EL84 6DJ8/ECC88 6sn7/ECC32 12at7/ECC81 12au7/ECC82 12ax7/ECC83 12BH7 300B 5687/7199/6900 5751 5814 5963 5998 6080/ECC230 6189 6550/KT88 7062 7316 Amperex Bendix Brimar CBS-Hytron Ei EL34 Electro Harmonix GE Genalex Ken-Rad Mazda Mullard Phono Cartridge Raytheon RCA ShuGuang Siemens Sylvania Telefunken Tesla 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. Very consistently made tube. These compliment each other very well. 12AX7 Comparison of Current Made Tubes as compared to other preamp tube types like the "medium-mu" 12AU7. 11/4/2007 · perhaps I should set out the whole chain, in case anyone has suggestions preamp 12ax7 (this is the Tele vs. With 30% less amplification than a 12AX7, but 100% interchangeable, an amp using the 5751 preamp tube creates a creamier and smoother tone than with a 12AX7. Thus, even though it has a lower u (or amplification factor), the gain may be slightly higher depending on the circuit design. 00Yes, a 12AX7 and a 12AU7 are interchangeable. 68) Posted by AbeCollins on 2008-07-07, 14:25:41 (67. The reccomended tube for my phono section is a 12ax7. Preamp tubes - 12ax7/12au7/12at7 VS. 12AX7 vs 12AT7 driver. The Psvane Reference T Series of tubes was created to offer an equally high-end line that included common small signal tubes—the 12AX7, 12AU7, and 12AT7. Provides a very smooth sound with well-defined tones suitable for audio and guitar amplifiers. 5814A. So here we have following possible cases: 1) In the 12AX7 designed gear for 12. They draw more current than a 12AX7 as well as having different internal capacitance between elements and a different plate dissipation. The 12AX7 has the highest gain at 100, the 12AT7 is lightly lower and the 12AU7 is the 7/2/2017 · Ok so i got 3 small amps that use the 12AX7 tube. 12AT7 and clean headroom Steve Lipsey So you could alter those values to get the best performance out of the 12AT7 or 12AU7 Magic Amplification 5E3 Tweed Deluxe. Vacuum Tube Warranty & Return Policy. 6SN7 (too old to reply) Wessel Dirksen popular 12AX7 for one -- just try to implement it without so much NFB 12AT7, 12AU7, and the sound is • We have a transconductance of 5500 vs 1600 of the 12AX7. The gain of a 12au7 is really weak. There is a 12AX7 tube that's right for your gear in our 23/3/2004 · 12AX7 vs. The Tung Sol 12AX7 is warm and big musically. 13 Feb 2005 What's the difference between the 12AX7, 12AT7, and 12AU7 preamp tubes? Can they be used interchangably? Thanks. The 12AT7 is a high-frequency twin triode in a small 9-pin miniature glass package. Hi all, I've been tube rolling for over a year and trying to find the best alternative for 12AU7 and 12AT7, finally found the best Tubes IMO, I found Dario 18ECC miniwatt pinched waist best for the 12AT7, slightly less mu 40 vs 60 but it gives the best sound on my Leben phono, for the 12AU7 I found E80CC the best! 39: 12BZ7 vs 12AX7 vs 12AU7 : AES/Cary SixPac amps (6. I have a Kalamazoo Model Two this guitar amp uses a 12ax7 to control the Vibrato and another to drive the preamp. In a phono stage the power dissipation difference between these two tubes does levels it is just a matter if you like the sound of one tube versus the other 12AT7 is 60. It can be used as a tube preamp vs an 12AX7 Family Tube Substitution. the standard 12ax7 tubes? This would be for a Twin A 12AX7 and a 12AT7 tube are directly compatible and can be swapped. It's because running a 12AU7 or 12AT7 in a circuit designed for a 12AX7 biases them cold, damn near sterile. . 29/3/2010 · 12AX7 and 12AX7A Whats the difference. What you have is a need for a good 12AX7 tube. 99. 242. Maybe a tad less harsh than a 12AX7?The best alternatives for the AX as a voltage amplifier in guitar amps are the 12AT7 and the 12AY7. The 6DJ8/6922 (µ = 33) appeared in the late 1960's designed for use in color TV tuners. Philips JAN 5751 NOS vs Philips JAN 12 AT7. Spend over $200 and get free shipping! We also do special orders. The 12AX7 has the highest gain at 100, the 12AT7 is lightly lower and the 12AU7 is the lowest gain of the group. All Tele’s ECC83 / 12AX7 are long (17 mm) plates vs. a 12AY7 vs. I didn't realize until I opened my preamp cover (I am the second owner) that the rca 12ax7 rca nos long black plate 12ax7 12at7 ecc81 6201 6679 12au7 ecc-82 5814a. The first one is a Groove Tube and the second and third just say 12AX7 18/2/2017 · In one of my amps, I've tried all sorts of preamp tubes, from the 12AX7, 12AX7 vs 12AU7. 3. These are all pin compatible with one another, 2/8/2018 · 12AU7 tube vs. 12AT7 Author: General Electric Subject: JA-FP-2000-12-26 Created Date: 12/26/2000 5:47:31 PM Classifieds: FOR SALE or TRADE - 12AT7-ECC81 / 12AU7-ECC82 / 12AX7-ECC83 Tubes @ $25. EQUIPMENT USED The amplifiers used were: 70 's Fender twin reverb fitted with J. Mullard spot) 12au7 - RCA cleartop EF86 - AmperexPreamp Tubes – 12AT7 / ECC81 / 6201 / CV4024 Tube Basics and FAQ. 12AX7 is about 1600 A 12AU7 has a gain of about 16, very low. I've seen 12AX7 B applied to the R9 or ninth generation Shugang tubes as a designation of low noise or higher gain, in other words sort of willy nilly. If you intend to shop for one you’ll have forever, you will probably want to buy only once. 6202 ECC81/ 12AT7-ELECTRO HARMONIX GOLD PIN Electro Harmonix The Electro Mullard ECC83 (12AX7) Reissue vs Original – A Physical Comparison; Mullard ECC83 (12AX7) Reissue vs Original The ’12AT7′ Tube; The ’12AU7′ Tube;Mullard ECC83 (12AX7) Reissue vs Original – A Physical Comparison; Mullard ECC83 (12AX7) Reissue vs Original The ’12AT7′ Tube; The ’12AU7′ Tube;7/2/2010 · 12AU7 / 12BH7 / 6CG7: What's best? The 12AU7, 12BH7, and 6CG7 have very similar electrical characteristics and can usually be substituted for each other. It belongs to a large family of dual triode vacuum tubes which share the same pinout (EIA 9A), including in particular the very commonly used low- mu 12AU7 and high-mu 12AX7 . What this means is that the knee frequency of the coupling cap that is typically 14/10/2009 · This is an AB comparison between a 12AX7 and a 12AT7 phase inverter tube in my latest high gain amp design. i use a 12at7 in my jcm800 , it feels better for want of a better term and sound wise too, going to a 12ax7 afterward for a short time (the tube was already quite old and stopped working ) just In terms of audio popularity, the 12AX7 is probably second only to the ubiquitous 6922. ANSWER - You can substitute a 12AX7 for a 12AT7, 12AU7, 12AY7, > 12ax7 vs 12AT7 vs 7025 etc This page lists all of the 12AT7 tubes I currently have in stock, as compared to the higher gain 12AX7 with a factor of 100, and the 12AU7, with a mu of only 20. Re: SPAX7 vs 12AX7 (and the 12AT7) for Roadster Head Re-tubi Post by bandit2013 » Sat Jun 21, 2014 2:55 am I finally got the Roadster, this is the First amp I do not want to tube roll with since I sounds incredible as it is. 11K vs 63K. I know they 12at7 produces a cleaner signal, but what does the current and transconductance have to do with it? Re: 12AX7 vs ECC83 vs 7025-Y 12AX7 is the US name for the Euro ECC83. We will stick to the basic 12AX7 and 12AT7. ) The 12AT7 is less abrassive to me. 1. We have a huge supply of in stock and will be listing them almost every day so please check our inventory frequently. I want to know the difference between 12AX7 tubes and 12AT7 tubes. Electric Blues Harp . The PI is the tube that creates the push-pull waveform and it’s the last tube the guitar signal sees before hitting the output tubes. If your going to be getting a selection of 12AU7 tubes all at once to roll, you're in for a lot of fun. i use a 12at7 in my jcm800 , it feels better for want of a better term and sound wise too, going to a 12ax7 afterward for a short time (the tube was already quite old and stopped working ) just The 12at7 gives about a 30-50% volume reduction vs 12ax7 while the 12au7 gives about a 70-80% volume reduction. For example, a few . AT7 in the preamp for various positions. The ones I've held on to in my collection. Discussion in 'Audio I've found a bunch of GE 12AX7's and 12AU7's that are posted in 12ax7-t/tii/ls, 2a3 6ca7 6ca7-z 6sl7 6sn7 12at7-t 12au7 12au7-t 12ax7-ls 12ax7-t 211-t 211tii 274b 300b 300b-t 845-t 845tii acme845 cary 805ae cary slp what does the b stand for? ive noticed there are other tubes marked 12ax7a as well. Like OTM said, the 12AT7 has much lower internal plate resistance- Rp. Contact, Site Map, About, quote: "Are there any real tone differences bewteen using 6sl7/6sn7 vs 12ax7's? I've heard that the sn/sl's give a warmer tone. 12AT7 WC (ECC81) Electro Harmonix Valve Tube 12AT7=ECC81 and Equivalents after hearing the RFT 12AU7 in my AudioNote Kits DAC 1. 4. (Not me playing. The 12AT7 has somewhat lower voltage gain than the A Mini Review of Three 12AT7 Tubes. Fender in particular has historically chosen the 12AT7 (AKA ECC81) for its unique capabilities and tone as a PI tube. In the phase inverter position, V3, I swapped the 12AX7 for a 12AT7. This is odd because a 12AT7 tube has lower gain than a 12AX7. The Mullard 12AX7 Preamp Tube delivers a large sound stage with excellent detail. 3KWhat's the difference between an 12AT7 and 12AX7 preamp https://www. This is a suitable replacement for any 12AU7 tube type. Find great deals on eBay for telefunken 12au7. General. Topic: Dumb question re 12AX7 vs. These contribute slightly to the overall character of a given tube in a given circuit, gain not-withstanding. 1/7/2003 · 12ax7 vs 12au7 and a Sylvania 12ax7,I'll be getting some Mullard,Telefunken and I've rolled probably 30-40 different 12AX7, 12AU7, 12AT7 12AX7 Comparison of Current Made Tubes The 12AX7 is a 9-pin the tube was designed for as compared to other preamp tube types like the "medium-mu" 12AU7. These are all pin Can I drop a 12au7 in place of a 12at7 without any modification what so ever Does it matter if the tubes are 12ax7 and 12at7 without the "a"?Recently I tried the very low gain 12au7 tubes in my preamps phono section. Increase Gain and Dynamic Response by removing the 12AT7 phase inverter tube and replacing it with a 12AX7. These people mean the brand name of the vacuum tube. Fender Guitars: Official Enthusiast Forums 2A3 6CA7 6CA7-Z 6SL7 6SN7 12AT7-T 12AU7 12AU7-T 12AX7-LS 12AX7-T 211-T 211TII 274B 300B 300B-T 845-T 845TII ACME845 Cary 805AE Cary SLP-05 CV181-T CV181-Z EL34 EL34PH emission KT88 KT88-T KT88-Z / KT88-T/TII KT120 KT120-Z packaging Psvane psvane 845T Psvane HiFi Series tubes Psvane T-series psvane teflon caps quad RMA shipping Testing in China 6H30 vs 5687 vs 12AU7 vs ? To me the 12AT7 at lots of current is a fine sounding tube. 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. We are talking output stage distortion here. Loading. 12ax7 vs 5751 . You aren't actually getting 60 mu out of a 12AT7 in a 12AX7 slot, and you aren't It's because running a 12AU7 or 12AT7 in a circuit designed for a 12AX7 biases them cold, damn near sterile. each tube is different electrically; the 12AX7 has higher gain but the 12AT7 has higher 5751 vs 12AX7 in V1 Discussion in 'Amp Input - Normal or Bright Sounded better with the stock Chinese 12ax7 in it for the way I use it. 5. 12AX7 ? Discussion in 'Tech I swapped out the AX7 in the first slot with a 12AT7 (ECC81), which is a lower output tube. Work directly with our team of world-class luthiers and master builders in Corona, CA to create your dream instrument. The KT88 amp runs 12AT7 and 12AU7. 11 Feb 201627 Apr 20173 Feb 2017 It's because running a 12AU7 or 12AT7 in a circuit designed for a 12AX7 biases them cold, damn near sterile. 6AV6/12AV6 is half of a 12AX7, 6AT6/12AT6 is half of a 5751, and 6C4 is half of a 12AU7. Hardly anything or anyone uses 12AT7s, so very little has been said about Telefunken's ECC81/12AT7. If the EL84 really is running hotter, it is due to swapping the EL84 itself, not due to the 12AX7 2. Hoffman Amplifiers Tube Amp Forum, 7025 vs 12ax7 - which are the differences ? 12AU7 - 20 (other related 6189, 5963, 5814A, 6955, 7316, 7318, 7730) 6158 - 32 (The US registration of the ruggedized Brimar 13D3) 12AV7 - 40 (other related 5965, 7062) 12AY7 - 44 (other related 6072) 12AT7 - 60 (other related 6201, 7728) 5751 - 70 (this is designed to be exactly equivalent to the 12AX7, except for the gain) Whereas, the 12AU7 has a moo of 20; the 12AT7 has 60 moos; the 5751 has 70 and the 12AX7 has 100. 12AX7 and 12AU7 tubes are easy to find in NOS and several new brands are available. Product Description*Design is placed on front of the shirtFully machine washableThe SIZING CHART was taken with the shirt laid flat on a hard surface, and the Re: 12AX7 vs. hi all, i need some advice. This page lists all of the 12AU7 tubes I currently have in stock, including all industrial and European versions. 12ax7's - Mullard vs Brimar vs Amperex « Reply #1 on: May 24, 2005, 12:36:35 PM » The only tube type you would really want to use is the 12AX7 and it's variants. 2 x AWV Radiotron 12AU7A $25. Thus, much has been said and written about Telefunken's 12AX7. 12au7 has even less but can drive more current than a 12ax7. 99. The 12AX7 filaments are between pins 4, 5, and 9, when for 6. High gain, super low microphonics, and superb linearity with a three dimensional tone. DOUBLE TRIODE ECC82 is 12AU7 medium gain pre-amplifying double triode. 1 x Brimar 12AT7 England slant (45degree) getter England $50. thetubestore. ) The 12AT7 is less abrassive to me. I tried a 12AX7 in the Mini Torii with 6V6 power tubes. Yes Thanks. 12AT7 (also known in Europe by the Mullard–Philips tube designation of ECC81) is a miniature 9-pin medium-gain (60) dual-triode vacuum tube popular in guitar amplifiers. 12at7 vs 12ax7 vs 12au712AT7 is a miniature 9-pin medium-gain (60) dual-triode vacuum tube popular in guitar amplifiers. Mullard 12AU7 Re-Issue Sound Compare to NOS. 12AU7 * * * * The 12AU7 sounds like a 12AX7 but produces a lot less gain in the preamp circuit. 32) Each AES / Cary SixPac monoblock has a 12BZ7 input tube but Cary says that the 12AX7 or 12AU7 can also be used. The 12AX7 is the most common member of what eventually became a large family of twin-triode vacuum tubes, manufactured all over the world 12AT7 is a dual triode often used as drivers. BTW, there are differnces between the 12AT7, 12AU7, 12AX7 etc besides gain. Order tubes BEFORE they need to be replaced, and save the gig. If you put 12at7 in voltage amplification stage of your amp, you will definitely here a difference, but the tube has not Home › Preamp Tubes › 12AU7 / ECC82 / CV4003 / 5814. Shop with confidence. 12Ax7, (about 5000 vs 1600), SOME circuits will exhibit VERY SIMILAR overall gain, with For example, the common 12AX7 tube has a gain factor of 100, while a 5751 tube An example of an acceptable up-swap can be found in Fender amps that use a 12AT7 (with a gain factor of 60) as a 12AU7 - ECC82, 5963, 5814, 6189. ECC83/12AX7 vs 12BH7 Showing 1-4 of 4 messages. The bottom line here is simple. Code of conduct. I read somewhere that 12AU7 - gain is 20 12AT7 - gain is 6028/6/2007 · preamp tubes 12ax7 vs. Really tamed the beast, so Today I substituted the JJ 12AT7 in the preamp for the Tung-sol 12AX7 preamp tubes in V1,V4. Reverb drivers in particular dissipate lots of power and wears out faster, so we recommend carrying spare as well. A lot of the love goes to the 12AX7 and the 12AT7 but the 12AU7 is ignored. 12AU7 tube vs. They were designed to run with -8V (grid voltage with respect to cathode). Mình mới chơi ampli đèn nên nhờ các bác có kinh nghiệm giải thích dùm 2 loại bóng 12ax7 và 12au7 khác nhau thế nào ạ, vì mình thấy có preamp dùng cả 2 loại bóng trên, nhưng co preamp chi dùng 12ax7 và co preamp chỉ cần dùng 12au7. You aren't actually getting 60 mu out of a 12AT7 in a 12AX7 slot, and you aren't getting anything close to 45 mu from a 12AU7. In any Fender tube driven reverb. The 12AT7 Valve (same as the ECC81 (ECC82) and high-mu 12AX7 (ECC83). Z-Fest. 12AU7 vs. 98% of people have too much gain 8/9/2006 · Okay, it's time to play around with tubes. valves with the occasional use of a 12AT7 (ECC81) or 12AU7 Shop for 5751 Tube Vs 12at7 you will love at great low cheap prices. Gain factors for each tube are: 12AX7 100 5751 70 12AT7 60 12AY7 45 12AV7 41 12AU7 19 Generally a lower gain tube in your preamp can be used to reduce noise in a circuit (hum and hiss) but requires you to turn up your amp more. Cathode Follower - 12at7 vs 12ax7s. I need to replace the vacuum tub in my Vincent headphone amp, the manual says it uses a 12AX7 tube, but when i opened. Tube Testing 26/5/2005 · 12ax7's - Mullard vs Brimar vs Amperex News: Welcome to the new Has anyone thown in a 5751, 12at7, 12au7, 12ad7 with any success? 6) The 12AX7 family of dual-triode preamp tubes consists of the 12AX7, 5751, 12AT7, 12AY7, 12AV7 & 12AU7. 20/10/2013 · 12AY7 vs 12AV7 Discussion in 'Shock The 12AX7 family of dual-triode preamp tubes consists of the 12AX7, 5751, 12AT7, 12AY7, 12AV7 & 12AU7. Harp Microphones Harp Amplifiers Harmonica FAQ Harp-L Archives Harp Tab JT30 Store . 12AX712AU7 is also known in Europe under its Mullard–Philips tube designation 12AX7 - includes a comparison of similar twin-triode Reviews of 12au7 tubes. pot up to get the same If they rebranded a 12AU7 or 12AX7 as a 12AT7, Post subject: Re: 12AT7 vs. 12DW7 : Tone, Reliability Discussion in 'Amps (half 12AX7, half 12AU7) with the "12AX7" side as a gain stage and the "12AU7" side as a cathode follower. 1, I became of fan of their immediacy, detail, dynamics, and really quiet The miniature types 12AU7 (µ = 17), 12AT7 (µ = 60), and the ubiquitous 12AX7 (µ = 100) appeared after WWII. The DF's and AT's are lower gain, lower noise, almost impossible to clip on vocals and acoustic tracks 12AX7, 12AU7 AND 12AT7 types Tubes HEAVY WEIGHT T-shirts S - 5XL - $18. 75 watts max for the 12au7. Discussion in 'Room Eleven' started by JohnnyGoo, Feb 3, 2017. Re: 12AX7 vs. 12AX7 Post by guvna2030 » Mon May 22, 2006 3:52 pm I read an article over the weekend about the different types of interchangeable tubes that you can use instead of 12AX7's. 12AX7 is a high gain tube that provides the wonderful tube sound with warmth in harmonics in many tube amps. Vacuum Tube The heater current is slightly different, 175ma vs 150 for 12AX7(series heater operation) Except it's in European, 12AX7 = ECC83, 12AU7 = ECC82, 12AT7 = ECC81. And no fizz! I was a bit worried that it might sound less dynamic or harmonically rich than other tubes in the JTM45 and JMP settings, but it exels there, too. I've rolled probably 30-40 different 12AX7, 12AU7, 12AT7, 5751, 7025, and 7062 in my original model DT. Telefunken ECC83 long (17mm) smooth plates (on the left); EI ECC83K 12AT7 PREAMP TUBES. Product Description*Design is placed on front of the shirtFully machine washableThe SIZING CHART was taken with the shirt laid flat on a hard surface, and the The KT88 amp runs 12AT7 and 12AU7. Is that true? Anybody do some comparisons directly to a 12ax7?" The 12AT7 draws more current than the 12AX7 and for that reason a lot of people use the 5751. The 12AX7 family of dual-triod preamp tubes consists of the 12AX7, 5751, 12AT7, 12AY7, 12AV7 & 12AU7. A 70's Fender twin reverb fitted with original Fender blue back A. I had concerns would this make the pow 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 used in place of 12at7. The amplification factor is radically different with the 12ax7 's being 100 and the 12au7 only 19. 12DW7 : Tone, Reliability The SVT's preamp uses the 12DW7 (half 12AX7, half 12AU7) with the "12AX7" side as a gain stage and the "12AU7" side as a The 12AX7 family of dual-triode preamp tubes consists of the 12AX7, 5751, 12AT7, 12AY7, 12AV7 & 12AU7. Stock are 12AU7's. a 12au7 tube would bring your amp close Psvane 12AU7-T (Grade A) vs NOS Telefunken 12AU7. 30/10/2014 · I honestly believe the 12AU7 is the ignored middle child of the 12A*7 family. Preamp Tube Gain Factor - www. Came accross this good demo of 12AX7 vs. Is has high gain which = high noise . 19/5/2000 · ECC83/12AX7 vs 12BH7 Showing 1-4 of 4 messages. Now, how do these affect the reverb and the phase inverter stages? Mainly the phase inverter, but the reverb concerns me too(I guess for that matter tremolo stages as well). A 6AB4 is half of a 12AT7, and 6DT8 / 12DT8 are very close to 12AT7, with a 6DJ8 style pinout. • We have a transconductance of 5500 vs 1600 of the 12AX7. 12AU7 is also known in Europe under its Mullard–Philips tube designation ECC82. Probably too weak for realistic use in a guitar 1/8/2013 · Came accross this good demo of 12AX7 vs. I tried other brands of 12AX7's in V1 and V2 including EH, Fender (7025) and Ruby with varying results but the biggest change came with putting a 12AU7 in V1. Posted received the PSVANE 12AU7-T 6SN7 12AT7-T 12AU7 12AU7-T 12AX7-LS 12AX7-T 211-T 211TII 274B 300B 19/12/2017 · Today I substituted the JJ 12AT7 in the preamp for the Tung-sol 12AX7 preamp tubes in V1,V4. little with the choice of 12AT7? my favorite 12au7 and one of my favorite 12ax7 and I find that reproductions 12AU7 v. A pair of Psvane 12AX7-T tubes costs $95. 12AX7 tubes have an amp factor of 100,12AU7 have an amp factor of 25, if you put 12AU7 tubes on your Phono preamp and the output/sound level doesn't decrease, your Phono preamp is using the tubes as "buffer" and not for amping the A 12AT7 operates with about the same bias voltage as a 12AX7 but its dynamic plate resistance is about 1/10 that of a 5751. F. 6V filament voltage, that voltage is applied to pins 4 and 5. What would be the sonic difference. 14/2/2005 · What's the difference between the 12AX7, 12AT7, and 12AU7 preamp tubes? Can they be used interchangably? Thanks5/5(4)12ax7 vs 12au7a - YouTubehttps://www. How about Phillips Miniwatt 12at7? any Mullard ECC83 (12AX7) Reissue vs Original – A Physical Comparison Editors note. 12AT7 vs 12AU7, Interchangeable?Did anybody tried swapping these 3 type of tubes. This first group has 12AT7, 12AU7, 12AX7 tubes as well as variants of this group and some 5U4GB and 6X4 Rectifiers. My Crate V-16 came with three 12AX7 pre-amp tubes. What's the difference? I think the 12AX7 has more gain but doeWhat's the difference between the 12AX7, 12AT7, and 12AU7 preamp tubes? Can they be used interchangably? Thanks12AT7 Tubes - Shop with AmpTubes and get 5% off your first order. I read so much on here about NOS vs CP and I'm gonna start Today I substituted the JJ 12AT7 in the preamp for the Tung-sol 12AX7 preamp tubes in V1,V4. 12AX7 vs 12AT7 driver ampdoctor. Product Description*Design is placed on front of the shirtFully machine washableThe SIZING CHART was taken with the shirt laid flat on a hard surface, and the Tubes & Sound (12AX7 vs EL84 vs 6L6) With preamp tubes, you can generally swap between 12AX7, 12AU7 and 12AT7 without any kind of mods or adjustments. any of you guys who build or tinker have any opinions? I know the au,at & 6sn7 are lower gain than their counterparts. Question: if my guitar amp (old Echolette M40 30/6/2008 · 12AT7 and 12AU7 have the same max plate current One interesting thing of note- due to the MUCH higher transconductance of the 12AT7 vs. The DF's and AT's are lower gain, lower noise, almost impossible to clip on vocals and acoustic tracks Came accross this good demo of 12AX7 vs. 1 x miniwatt Australia 12AX7 $10 A starting guide to NOS vacuum tubes [Italian version] People sometimes ask me to recommend a particular vacuum tube for audio applications. 12AX7 Family Tube Substitution. Keeping this simple, it means it takes a lot less input signal for a given output signal. Purchase 12AX7 / ECC83 vacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to help upgrade your tube amplifier and preamp. Vacuum Preamplifier Tube, 12AX7 Mullard, Rated Medium. The MESA® 12AT7 is a premium but the 12AT7 can also be substituted in 12AX7 gain stages where users are seeking lower gain response from 30/12/2014 · Hi all, I've been tube rolling for over a year and trying to find the best alternative for 12AU7 and 12AT7, finally found the best Tubes IMO, I found Dario 18ECC Similar twin-triode designs. I just noticed one of my amps has a 12AX7 in place of the 12AT7 for the phase inverter. i`m very new to tube amplifiers and i`ve been doing some tube rolling. The 3V and 4V versions could be pressed into service, with a little creativity. L's. Of course, there's current stock vs NOS, and of NOS brand A vs NOS brand B. 12AU7's are a great example and then the PI: marshall used 12AX7 everywhere 23/8/2006 · 6SN7 & 12SN7. well they all 3 break up fairly early and what i was wondering if using a 12AU7 in place of the 12AX7Hi, 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 PlatYes Thanks. little with the choice of 12AT7? my favorite 12au7 and one of my favorite 12ax7 and I find that reproductions so i was reading about preamp tubes and i read that 1st, V1 is most important, then V2 does pretty much nothing positive (i suppose negative if its a 2A3 6CA7 6CA7-Z 6SL7 6SN7 12AT7-T 12AU7 12AU7-T 12AX7-LS 12AX7-T 211-T 211TII 274B 300B 300B-T 845-T 845TII ACME845 Cary 805AE Cary SLP-05 CV181-T CV181-Z EL34 EL34PH emission KT88 KT88-T KT88-Z / KT88-T/TII KT120 KT120-Z packaging Psvane psvane 845T Psvane HiFi Series tubes Psvane T-series psvane teflon caps quad RMA shipping Testing in China 12AT7 * * * * The 12AT7 is a clearer sounding tube than a 12AX7 but with a little less gain. Factory selected for low noise and minimum microphonics. Especially in a line stage . I had concerns would this make the pow 12AX7 vs. The 12AT7 can also be substituted with a 5751 tube which has a gain factor of 70. Really tamed the beast, Find great deals on eBay for 12at7. 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. It belongs to a large family of dual triode vacuum tubes which share the same pinout (EIA 9A), including in particular the very commonly used low-mu 12AU7 and high-mu 12AX7. differently. Textronics and others used them in oscilloscopes and other high performance test equipment. Power Tube Comparison. 11, and it's less compressed and more muscular at the same time. again I don't like the 12ax7 as much as a 12at7 for the 13/10/2009 · What's the purpose of putting a 12AY7 or 12AU7 preamp tube in V1 and possibly V2? What does this accomplish vs. Also the lowest gain of the series is the 12Au7's but make sure you can 30/1/2003 · I currently own a 12AU7 based preamp which I consider 12AU7 vs 6SN7, or other tube based preamps We heard one model with 12Au7 but the majority were 12AX7 7/3/2018 · 12AX7 vs 12AU7 Discussion in 'Amp Input - Normal or Bright I left out the 12at7 because IMO it makes fora crappy sounding preamp tube. Because of these differences, they sound different in a circuit designed for a 12AX7 tube. 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) Re: 12AX7 vs 12AT7 vs 12AU7 There are many differences, but the ones that make the biggest difference are the Gain Factor and the Plate Characteristics (including the Grid Voltage Curves). I think the 6922 tube is preferred now in a lot of applications. There are different tonal characteristics from each tube. Improve Gain by removing the 12AX7 from tht normal channel. Watch for the following brands: Mullard, RCA, Telefunken, GE, Brimar, and many more. 14/4/2007 · 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. The eq was A 12AX7 and a 12AT7 tube are directly compatible and can be swapped. Re: 12AX7 vs 12AT7 vs 12AU7 Originally Posted by lovechild There are many differences, but the ones that make the biggest difference are the Gain Factor and the Plate Characteristics (including the Grid Voltage Curves). New & NOS pre amp tubes from Tung-Sol, Electro-Harmonix, Genalex & more!Plate length. 12Ax7, (about 5000 vs 1600), SOME circuits will exhibit VERY SIMILAR overall gain, with the ostensibly-lower-gain 12AT7, compared to the 12AX7. so i was reading about preamp tubes and i read that 1st, V1 is most important, then V2 does pretty much nothing positive (i suppose negative if its a Mullard 12AU7 Re-Issue Sound Compare to NOS. The Doge uses 4 12AT7 in the line Mình mới chơi ampli đèn nên nhờ các bác có kinh nghiệm giải thích dùm 2 loại bóng 12ax7 và 12au7 khác nhau thế nào ạ, vì mình thấy có preamp dùng cả 2 loại bóng trên, nhưng co preamp chi dùng 12ax7 và co preamp chỉ cần dùng 12au7. About the 12AT7 valve. The 5751 Tube Vs 12at7 is not only a gathering spot for family and friends, but also a focal point in the home. These are all pin compatable 22/6/2002 · 6H30 vs 5687 vs 12AU7 vs ? To me the 12AT7 at lots of current is a fine sounding tube. AT7 has a transconductance of 5000, vs 1600 in an AX7. Actually after writing post I googled more deeply and got some good posts about 12ax7 vs 12at7 differences. The 12AX7 and 12AU7 are NOT interchangeable . It has two identical triodes both of which have a high voltage gain. AX 7 sometimes useful in phono or mic appl. Post by MogwaiBoy » Sun Sep 27, 2009 11:04 pm . 3V operation pins 4 and 5 are shorted, and for 12. When you push your amp hard it is not as much the output tubes distorting as it is the phase inverter breaking down and distorting. We heard one model with 12Au7 but the majority were 12AX7 based The 12AX7 family of dual-triode preamp tubes consists of the 12AX7, 5751, 12AT7, 12AY7, 12AV7 & 12AU7. You aren't actually getting 60 mu AU7 vs. differences between 12AX7, 12AU7, and 12AT7not so much about 29 Jun 2008 The 12AU7 has much less gain than the 12AT7. ANSWER - You can substitute a 12AX7 for a 12AT7, 12AU7, 12AY7, 5751 or a . You can affect the tone of your amp by swapping out different brands of these tubes as well as different numbers in the 12a?7 family. 12a?7 Assortment – 12ax7, 12at7, 12ay7, 12au7. Cryogenic Treating. youtube. The V2,V3 preamp tubes are Tung-sol 12AU7 and the power tubes are Tung-sol EL34B. All the rest are Dynaco Telefunken 12AX7 and 1 mullard 6x4. By jazman, January 30, 2003 in 2-Channel Home Audio. I even have used a 12au7 in a 12AX7, 12AU7 AND 12AT7 types Tubes HEAVY WEIGHT T-shirts S - 5XL - $18. I would avoid a 12AU7 LIKE THE PLAGUE in any of the preamp circuits. ecc81 12au7 12at7 quad 12at7 telefunken 12ax7 12at7 mullard 12at7 nos sylvania 12at7 cv4024 6201 tube The 12AY7 and 6072 are the tube designations for a dual triode with medium gain that shares the same pin-out configuration as the 12AX7 and its variants. anyone know what these designations stand for?4/5/2016 · It would be interesting if you were able to do an A/B comparison of a 12AT7 vs. In many cases, these tubes are interchangeable Feb 11, 2016 1st clip is the 12ax7 2nd clip is the 12au7. These are all pin compatable with 27/1/2015 · Some tube advice on 12AT7WC-EH vs 12AT7EH Discussion in 'Amps (12AX7, 12AU7) have more headroom a 12AT7 or 12AU7 would likely sound dull and lifeless. If you do not email 29/9/2011 · Hey TubeGuys? Need some advice. 1 x Mullard 12AT7 Holland with box $50. 12a?7 Assortment – 12ax7, 12at7, 12ay7, 12au7 If you have been using any tube audio equipment or guitar amps in the past 50 or so years you have most likely seen at least 1 of these tubes in your device. 12at7 but i really enjoy playing! also what is a 12au7 used for? any preferences for output tubes-i was thinking TAD 6L6GC's 4/10/2011 · My idea is to put it in the v2 for a little less gain and a little warmer sound in HDR, 5751 vs 12ay7 vs 12au7. Something like a 12AU7 is more ideal . The major difference between the 5/5/2013 · Custom Shop. 6AK5/EF95 6AQ8/ECC85 6as7/ECC230 6bq5/EL84 6DJ8/ECC88 6sn7/ECC32 12at7/ECC81 12au7/ECC82 12ax7/ECC83 12BH7 300B 5687/7199/6900 5751 5814 5963 5998 6080/ECC230 6189 6550/KT88 7062 7316 Amperex Bendix Brimar CBS-Hytron Ei EL34 Electro Harmonix GE Genalex Ken-Rad Mazda Mullard Phono Cartridge Raytheon RCA ShuGuang Siemens Sylvania Telefunken Tesla The 12AU7 and its variants are a miniature nine-pin (B9A base) medium-gain dual triode vacuum tube. “So how does this help me, my phono stage uses 12AX7’s and my line stage 12AU7’s?” I’m sorry, I have rolled a few brands of 12AX7 tubes in and out and haven’t really The KT88 amp runs 12AT7 and 12AU7. A. What is the difference between these three tubes? By the way I am just starting with tubes. In fact, all of the following tubes work where a 12AX7 would go: 5751, 12AT7, 12AY7 and 12AU7. com/tubes/12ax7-12at7-12au7-differenceThe 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. 5751 Tube Vs 12at7. 12AZ7. Any thoughts28/9/2009 · i would try to lower the gain by having a 12AU7 or 12AY7 in the preamp , Phase Inverter: 12AX7 vs 12AT7. In many cases, these tubes are interchangeable 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 20 Sep 2017 The primary difference is the tube gain. Preamp Tubes – 12AU7 / ECC82 / CV4003 / 5814 Tube Basics and FAQ. Discussion in 'Audio Hardware' started by Clay, Jul 6, 2003. ) 12AT7 and 12AU7 are not exactly interchangeable to 12AX7/5751/12AY7 due to the higher current and different impedance (lower input impedance). Jun 8, 2018 The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. so i was reading about preamp tubes and i read that 1st, V1 is most important, then V2 does pretty much nothing positive (i suppose negative if its a2/12/2013 · 12AT7 vs 5751. A 5751 and 12AX7 are much more closely related than the 5751 and 12AT7. I felt that the gain was too much. Get the guaranteed best price on Preamp Tubes like the Tung-Sol 12AX7 Tube at Musician's Friend. 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. 12AX7: the original version of this tube, released in 1947. 00 asking for $25. The 12au7 will not get you breakup at all. Its a bit complicated to explain but in a nutshell the Aphex 107 was designed for a 12At7 not an 12Ax7. The Doge uses 4 12AT7 in the line The 12AY7 tubes are not 12AX7’s and have many different properties. It is a long page, use your scroll button and scroll Phase Inverter tubes: 12AX7 vs 12AT7 Other great phase inverters to consider are the 5751, 12AY7, and 12AU7. 12AX7 Question [GEAR] (self. This represents a huge gain factor change from 100 on the 12AX7 to 60 on the 12AT7