12ax7 tube rolling

12ax7 tube rolling. 12AX7. As a tube amp owner you should have a spare set of tubes on hand anyway, why not buy 2 12AT7 and 2 12AX7A Gold Lion tubes? Tube rolling refers to the practice of swapping out the stock tubes in a tube amplifier or preamplifier with different tubes to achieve different sonic characteristics. I'm not an expert on 12AX7s for phono stages as I haven't rolled them much. I gave a couple to a guitar player friend of mine and he loves them. Perfect V2+ Preamp Tube - Good Gain - Tight Deep Bass - Fat Mid-range!! &nbsp; The TAD 12AX7A-C / ECC83 TAD Premium Selected provides very good After some tube rolling I found the Gold Lion 6922. I have one of the original all-tube V-Type amps. It has nothing to do with living up to rated frequency 12ax7 Tube Rolling Rogue Cronus Magnum II. These tubes include those produced by Mullard, Amperex, Siemens, Telefunken, Tungsram, RFT, Ei, Mazda, Lorenz, Philips and others. Next, the expensive Mullard 12AX7 long plate is also very low distortion and can be a little polite, perhaps a little dark sounding, but ultra clear sounding. Last I saw, NOS Telefunken "box plate" which are the short plates were going for almost $1k a piece over at tube depot. hifiharv. After reading up to this point in our guide to the best 12AX7 tubes, you should now have a basic understanding of what these devices are capable of, and how you can use them for your music-related requirements. 5mv cart on 1:20 = 10mv!!! If you want to know which pair of 12AX7 tubes are in the phonograph preamplifier stage, and which pair are in the line stage, watch this video if you want to Here we go on a small journey of tube rolling which just means changing the Vacuum tubes for different brands. Tube 12AX7 or Röhre 12AX7 ID3730, Double Triode, Noval, 9 pin miniature (USA pico-9) B9A and Audio Frequency shown. The plate structure is very tough, featuring smaller ribbed plates with a thick glass Rolling tubes can be fun and frustrating. Thread starter marshanp; Start date Dec 28, 2023; 1; 2; Next. Excellent scaffolding design, reasonable, regular, symmetrical device layout, strictly respect the grounding line ; Power Transformers 76 * 40 H250 0. Have you even tried different tubes in a tube amplifier? A. If my understanding doesn't fail me, the 12AX7A tube is a lower noise and less hum of the original 12AX7 tube. After some tube rolling,the best sound came with reissue mullard ECC83,and original telefunken Ecc83,special grade from old EGC machine. I can't say I noticed as drastic a difference from the Chinese tubes; but I did hear some; so I'm happy with the tubes there. Skip to content 60-Day Returns* - Free USA Shipping Over $49* - 1. Good gain, great image, deep soundstage and the high frequency area is top. I found the Genalex Russian tubes to be way too bright and glaring. Radiotechnique 12AU7/6189 – Badass tube from France made in 1965. You will love it after you change the stock 12ax7 that's for sure. First I tried a Full Music TJ 12AX7 that I pulled out of my puresound P10 phono amp. There are best sounding 12AX7 tubes. We only tested three types of preamp tubes because The 12AX7 tube is the most popularly used vacuum tube for musical and audio purposes. Rolled the Chinese 12AX7's back in and sure enough they had more air, clarity and overall just more listenable than the Mullards. These tubes are known for their smooth and warm sound I've just purchased a pair of vintage 60s NOS RCA 12AX7A tubes to try in my phono pre. DaveyF Forum Resident. Two 12AX7's and two 12AU7 types. These tubes are known for their smooth and warm sound, excellent detail retrieval, and low noise performance. Now since they are technically not the same tubes I wonder if I could cause some damage using them like that. 1 of 2 Go to page. Some popular options for 12AX7 tube rolling include the Mullard ECC83, Telefunken ECC83, RCA 12AX7, and the Amperex 12AX7. They are still in production, made by New Sensor in Russia, Shuguang and Quanzhen in China, and JJ Electronic in Rolling the 12AX7 Vacuum Tube for Beginners. That’s the maddening part of tube rolling - your mileage will always vary! For ECC83/12AX7, my favourites are: Shuguang Custom 12AX7 LS (black bottle) Smooth Plate- King of cream, this is the smoothest sounding 12AX7 ever made! Ribbed Plate- Great for both guitar amplifiers and hifi We will match for free just add the quantity you would like! The Telefunken 12AX7/ECC83 is a legendary vacuum tube and quite possibly is the best 12AX7 ever made for audio applications. Not recommended for line stages on the FISHER's. Better dynamic, etc. In der einschlägigen Literatur und den begleitenden Diskussionen kursieren unterschiedliche Bezeichnungen der ECC83. RCA long-plates. It works well with my power amp (Primare A34. 00. Well worth the cost to The top-notch performance at a more accessible price point makes Sylvania preamp tubes a great choice to experiment with for folks who are on the fence about purchasing NOS vacuum tubes. Radio tubes are valves. I posted the schematic and according to another ak member the negative feedback 1950s Raytheon 5814A -ECC82 12AU7- Black Plates, 3 Mica- An excellent silent tube with full body sound nothing really rounded off if anything its a little polite on higher end- the bass is tight and with a nice spread out sound Quite a few McIntosh audiophiles have found that to be true and have nothing but high praise for the improvement in micro-details & overall clarity the newer Genalex Gold Lion Gold Pins offer, whether it be the 12AX7, AT7 or AU7's. In that application, a 12AX7 will operate as a more efficient cathode follower, because it is the inherent gain of that tube coupled with the inherent 100% NFB of This is the second installment of the tube Rolling the Xduoo Series. The EL84 is Cg is 10pF and the 12AX7 output impedance in this circuit is ~100k making the -3dB frequency around 150kHz. Also known as The Mesa Boogie 12AX7 R2 ECC83 Gen Pak are unused older stock with generic tube boxes. My tube receiver shares 12AX7 with preamp & phono in one tube. The Tung Sols have deep bass ECC83 Telefunken 12AX7 Types My regular job hadn't any connections with vacuum tubes at that time, except for the music endlessly playing on my tube amplifiers. Newest first about 15 of us got together at my home and had a 12AX7 tube shootout using the DA60. Discussion in 'Audio Hardware' started by Mambo Sun, Oct 21, 2023. (Note, I have no opinion about the long-term reliability of this product and know very little about the company that made this product in China) I will continue to test this preamp. Hi,I'm looking to tube swap my 12ax7's on my Rogue M120 Magnums. The Golden Lion from Russia sounded and looked identical inside to the Russian 12AX7LPS. Vincent Tubed Products are of a very good Product Build and Quality. Then I got the GE 838, which was wonderful and sounded that much better. I have the 12ax7 the only tubes much better are the Old Amperex 1950s D getter ECC83 Telefunken 12AX7 Types My regular job hadn't any connections with vacuum tubes at that time, except for the music endlessly playing on my tube amplifiers. For those who aren’t familiar with tubes, there is also the Intro to Tubes that will help get you up to speed. What I'm finding is warmer just means a soft top end and some bloating somewhere in the mids to lower mids. It’s popularity is driven by use in many Hi-Fi tube amplifiers and especially guitar amplifiers, where it’s pushed really hard and burns out fairly quickly. Based on the old mfg/date code, I think they are French made. There are some other tubes that are lower gain, but will work to change sound as well. The 7025 was just a 12AX7 with a spiral wound filament to reduce hum. I felt that the tubes in my system were very lean and the top end could be over-bearing at times. Brimar CV4004 12AX7. A 12AD7 is like a 12AX7 but with ultra low hum and noise and with better linearity than a standard 12AX7 tubes and it's designed to be used where 12AX7 are to be used. 1 made me curious for the Psvane 12AX7. The tube 1/2's should be matched as much as possible for these tubes as each tube does the Left and Right sides. It is line preamp,with 4 line inputs. Both again utterly wonderful. In samples where guitar sound was playe In my exerience the Mk I V-Type preamp is not very sensitive to tube rolling. Tung-Sol ECC803s 12AX7 Gold Pin Preamp Vacuum Tube 3. So, I'm open to suggestions for tubes for the phono-stage. E. 00: out of stock: Watch a brief video showing the rarest 12AX7 vintage tubes! I believe most amps show a preference for some tubes over others, and that those differences make tube rolling a worth while exercise in most cases. Here are a few of my thoughts. They will in most cases if not all, cost more than new manufacture. Während die ursprünglich durch RCA entwickelte Triode den Namen 12AX7 (ECC83) trägt, wurden Neuentwicklungen mit der Bezeichnung 12AX7A vorgestellt. These tubes, while similar in almost all aspects, do have a few differences. I want to try something else maybe a different brand or tube number with EAR 834L tube rolling - valve gurus needed. SKU: 61-1190 Category: NOS 12AX7 / ECC83 / CV4004 / 7025 / B759 / M8137 / ECC803S Tag: Pre-Amp Brands: Brimar. a signal is being amplified by them) ? Does it use a half dozen 12AX7 / ecc83 tubes? Those are some of the most popular preamp tubes which mean you have a wide variety to select from. Same with the Wright 200C, not particularly sensitive to tube rolling, unfortunately. Generally, many companies had their own designations and suffixes and prefixes to make their product stand out. It’s unusual to find any tube guitar amp without at least a single 12AX7 in it, most commonly in the preamp. I did a test with 3 pre-amplifiers and I decided to share it. it IS the highest gain 12AX7 tube and loved by guitarist, but it sounds AMAZING in my Demeter!!! gl . After this mod the sound is much better but is not good to my taste. I see the owners manual states that this preamp uses As all “what’s best” questions are obsolete in our beloved hobby – the answering community might have recently tested some 12AU7 in an USB DAC, where the task of the 12AU7 is – if we are lucky – to be a gain stage and Adds the 'rock' to rock & roll- a complete tube that falls in the center of different flavors. As far as the 12BH7 - it is hard to find a 'bad one' - my backup amps use 'em as phase splitters and so far all the brands I tried sound quite respectable to my ears. $ 119. Most current production 12Ax7 tubes are suitable for guitar applications while paying At first I though the EL84 grid capacitance might be a bit much for the 12AX7 to drive, but it's okay. Not a lot of coloration. Since I used to graft this circuit on a Dyna PAS preamp, I ordered a pair of 12AU7/12AX7 > 6SN7/6SL7 adapters to relive the experience on my RCA Rolling tubes with my Lamm ML2. Priced per single tube, a matched pair is $1999. To follow up my rookie question with yet another rookie question, what effect do the 12AX7s have on the SQ for the I have a Little Bear T11 and decided to do some tube rolling. Next to the Shuguang, they kinda look boring. My music is mostly rock and roll. Head Gear. Even the Nob Sound versions Douk sells. Ttd1 Active Member Thread Starter. 50. Dabei sind die Tubes untereinander austauschbar. The amp utilizes a 12AX7 tube running at 150V. Things like headphone pairings, tube rolling and other source gear will produce different results and impressions vs what my ears hear on my specific gear. Jan 7, 2024 #2 You will get a lot of different answers. October 3, 2019. In the world of tube rolling and especially the 12AX7 you do get what y F18. No problem there. Delshadowrio Active Member. RCA 7025 (low noise 12AX7) Sounds similar to the Mullard. Read on for more details. The Mesa Boogie MESA 12AX7 Russian 2 is a premium-grade preamplifier tube. Any info good or bad will be great. That's what tube rolling is all about! More specifically, I'm wondering if there has been any benefit to rolling the EL84 tubes, as I haven't had much experience doing that with cathode biased amps. ). Expand all responses; Collapse all responses; Sort . Reisong A12 Tube Rolling (EL34/12AX7/5Z4PJ) DIY Alright Y'all, I hope you're all having a great week so far. Im Moment werkeln in meiner WBE Endstufe ein paar How to Make Chicken Roll Ups. Knowing my love of tube amps and tube rolling, I was approached by Little Dot USA to review the new Mk3SE hybrid tube amp and do a bit of tube rolling with it as well. The outcome with rolling is so system and circuit-dependent there is no one sure answer. JJ ECC83s / 12AX7 Preamp Vacuum Tube. My advice would be to try and get it fitted with 12AX7 tubes. I decided to take the day and roll some 12AX7 pre amp tubes to try to decide what is my best sounding tube and I can't really say that only one brand of tubes would be my I just acquired a McIntosh C2300 preamp that is currently being shipped to me. Die heute No plans to change the Shuguang tubes. Location: This amp has one 12ax7 tube and two 6NIP-EV. So its still using it's Chinese variants. Otherwise, do some tube-rolling of your own to see which tubes you like the best. Technical Aspects of 12AX7 Tubes. milimetr 05-14-2009 6:52am. Tube rolling. Big, warm, and musical. marshanp ellipsis addict. The last tube From our review of the Electro-Harmonix 12AX7 vacuum tube: "The EH-12AX7 preamp tube has a nice balanced sound, a very low noise floor and excellent performance in terms of microphonics. 15 responses Add your response. You want to buy from a Hello - Im relatively new to Tube Amps - made my 1st purchase a little over a year ago and bought a new YAQIN MC-13S. Couldn't tell a huge difference between the two tubes. The Twin still has Tung Sols Two popular vacuum tubes often used in audio applications are the ECC83 and the 12AX7. That's the beautiful thing about tube rolling, if you have several sets of tubes with different sounds you change the tubes and change the sound to your Pre-amp tubes NOS 12AX7 / ECC83 / CV4004 / 7025 / B759 / M8137 / ECC803S Brimar CV4004 12AX7. This is strongly recommended in tube-rolling threads, among others. 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. This is a special case because you can only use the 12BH7 tube if your heater supply is capable of putting out a full 600 mA into the filament. I would buy them again. Location: I recently reviewed the Nobsound Douk 6N3 tube preamp. Developed around 1946 by RCA engineers [2] in Camden, New Jersey, under The best 12AT7 I've heard are the Mullard 12AT7WA / CV4024 / M8162 tubes made in Great Britain. Since I aquired some vintage JJ 5751 tubes I tried them in Slot V1 in my Little Bear and 12ax7´s in slot 2 and 3. One day, in the middle of work time, a colleague entered my office to ask something and from the corner of my eye I glimpsed a man who was especially those with not-so-long path into tube rolling, that is a 7025 * * * * The 7025 has a higher gain than a 12AX7 tube. most out there . The lack of microphonics may be due in part to the return of a shorter plate structure or better materials. As for the original question, tube rolling is equivalent to seeing what non-factory spec aftermarket part has what effect in One 12AX7 tube that is quite highly regarded for guitar amps is the RFT 12AX7. The 12AX7 is a fun tube to roll. 💣 💣 💣 . The 12ax7 / ecc83 These are miniature dual triodes with a high voltage gain, commonly used in preamplifiers. I don't know about the others. The sockets become defective (they lose their elasticity and do not I remember that thread in my 12ax7 tube rolling adventures. I want to replace the 12ax7 with nos rca 5751 tube that i have in hand and i wonder if that can damage the amp. Reminds me of a good aged glass of Merlot or even Buy BOYUURANGE Reisong A12 EL34 12AX7 (ECC83) Hi-Fi Audio Stereo Single-end Class - A Tube Amplifier Amp: Amplifiers - Amazon. Hardly any prints on it. 45. 2 Class D). The stock Chinese tubes MUST go if you want to get the most from the 1501. Dec 28, 2023 #1 I have recently acquired an EAR 834L line stage, and I like it a lot. If so, the 12BH7 tube will expand your tube rolling capabilities. Many times when a piece of tubed equipment is noisy, the cause is a bad connection between a tube an. Next Last. After a year with the 6n1p-EV tubes "rocketship" tubes and the Electro Harmonix Gold 12AX7 tube I thought I'd try something else in all positions The 12ax7 tube is arguably the most popular audio vacuum tube that has ever been created. Two tubes that sound great. But to help you choose the right tube, you need One of the 2 or 3 "holy grail" 12AX7 tubes ever made at any time, you have to hear these to understand why they are so rare and costly. However, I couldn't stop myself and today I replaced the stock tubes to get an idea of what difference it would make. Forums. I have bought a couple of 12AT7 tubes to try and thus far seem to like the older black-plate RCA tube and a blackplate 12AT7WA/6201 tube. But to my suprise when I read the manaul to only find out that sv-236 is using three 12ax7 tubes and sv-237 is using one 12ax7 and two 6N1P-EV tubes. Looking for opinions on the new runs of Mullard 12AX7 long plate Mullard CV4004 short plate Genelex Gold Lion 12AX7 Any others I might of overlooked Or bite the bullet and use funds for Vintage 12AX7. G. It can be confusing for a consumer to choose between 6j1 and 12ax7 if they are not conversant with both of them. 99. You can beat the crap out of it and it will still go! Interesting notes: I have heard that ECC803S tubes (12AX7's on Steroids) are great for guitar amps because they have a spiral filament for reduced Which 12ax7 is the gain tube and which 12ax7 is the tone tube position?, in a Fisher 400? If facing the Fisher 400 tube receiver from the front looking over the dial glass is the tone 12ax7 on the left and gain on the right? I don't have a manual and I'm trying to decide which 2-positions to put my 2-Raytheon 5751 windmill getters in. 99 Another botched decision by the designers to use these oddball tubes instead of something readily available like the 12AX7 but they may have just been catering to the subset of tube fetishists hobbyists that believes that the more obscure / esoteric the tube is (directly heated triodes for example), the 'better' it must be. please don't get a "best 12AX7 tube" thing going. So you get years and The JAN-GE 12AX7 amplifier tube is a classic and you won’t find a better replacement for your Fender. These are matched and selected for low noise. All you can do is listen to the tube in your system and make a determination if you like it or not. Page 2 of 2 < Prev 1 2. From McIntosh to Cayin to Fezz, amps that are beloved by audiophiles everywhere are powered by these tubes. Note: Tube models may vary according to supply chain. It was first introduced in the 1940s and has been in almost continuous use and production in all manner of audio equipment developed since then. Based on user ratings in the last 8 years, here is the list of winners and losers. What is tube rolling? Tube All the Shigeru clones I've seen use four tubes, two per channel. it IS the highest gain 12AX7 tube and loved by The Tung-Sol 12AX7 has been my go-to tube for all my amps V-1 position for years now. However, they are greatly limited by the cheap mass-market Chinese Stock vacuum tube copies which are relatively poor in quality and designed to keep 1960’s -1970’s RCA short Plate 12ax7 NOS Tube. We believe GE swiftly got to work on their own version, evidenced by our encounters with KENRAD You guys won’t like what I am about to write. 2024-07-28 6:31 pm #43 2024-07-28 6:31 pm #43 If you want a particular sound, why not tweak the bias and operating point to achieve that sound with the tubes you My Current Favorites (after a lot of tube rolling): 12ax7 (first slot from front, input tube): NOS Baldwin shiny blackplate made by Ratheyon (organ tube) from Brent Jessee for $50. These chicken alfredo roll ups are so good, you’ll be adding them to your weekly meal I recently acquired a Nobsound ‘Shigeru Wada’ preamp and want to try some tube rolling. Reactions: saggy. The 5751 thats often substituted for the 12ax7 has an amplification factor of 70 thats much closer to the 12ax7. The sparkle has returned to my 64 year old tube amp (last rolled in 2005). Last edited: Sep 15, 2017. One of the best Rock N Roll guitar amp tubes ever made! Screened for low noise and microphonics just $179. Tube rolling is a great way to get your system sounding far sweeter. Admittedly, the Russian makers had no concerns about audio use as most of these tubes were built for radar arrays. UPDATE - 23 October 2014 Well, I have another update to the possible tube list for the 4S Universal Preamplifier. Shop Shop Vacuum Tubes Small signal tubes with numbers like 12AX7, 12AU7, and 6922, and rectifier tubes like 5AR4 may go 10,000 hours. Interesting point about changing the caps though. H. If you are interested in the kit, it can be found here: 12AX7 12AU7 Stereo Vacuum Tube Preamplifier DIY Kit Shigeru Wada Japan Circuit 325646489355 | eBay or in EU, here: New version DIY kit 12AX7+12AU7+6Z4 vacuum tube preamplifier kit tube AMP | eBay Here is my guide on building it. Both can be used where a 12AX7 tube should be used so they are fully compatible with the original design. i personally was enlightened by him as well as others on his "Tube Rolling" review thread. It Re: Tube Rolling 12au7, 12ax7 Reply #119 - 04/28/23 at 21:43:49 After some reading I went way way way down the wrong road all the while convinced it was correct. Even tho the 5751 is a 12ax7 variant, it's gain (or mu) is 70, vs. Power tubes are out-of-scope 🙂. 95 Subscribe & Save. I started like most enthusiasts by using the tubes that came with the amp I purchased. Both channels go through one single tube, as i recall, it's the right most one. Also, the 7025 tube is a lower noise and reduced hum version of the original 12AX7 tube. Maybe someone who has owned the Vincents can help you with tube rolling and give you more info. After all, the tubes in the amp sounded great! Initially. I've now owned the 1501RC for 6 My Current Favorites (after a lot of tube rolling): 12ax7 (first slot from front, input tube): NOS Baldwin shiny blackplate made by Ratheyon (organ tube) from Brent Jessee for $50. On the other hand. The only person (purchase his amp) That does PSVANE Horizon Tubes⭐️ ⭐️ ⭐️ ⭐️ ⭐️Price: Varies (August, 2024) PSAVNE Horizon KT88-AT: https://amzn. Die folgende Geschichte erklärt, wie ich durch Tube Rolling den Bären zuerst gebändigt und ihn mir anschließend aufgebunden habe. The top end is silky and pleasant, without being rolled-off. Mine is the MM only version w/o volume control and is fed from Audiogon The world's largest high-end audio community. Vacuum Tube: EL34 x 2,12AX7 (ECC83) x 2,5Z4PJ x 1 ; If there is no sound from the machine after waiting for a few minutes, Please make sure the 12AX7 is a miniature dual triode tube with high voltage gain. These are the genuine 1950s vintage Raytheon shiny blackplates. Kiko1974, Feb 23, 2018 #6. The same is for the Psvane 12AU7. Palustris AK Subscriber Some popular options for 12AX7 tube rolling include the Mullard ECC83, Telefunken ECC83, RCA 12AX7, and the Amperex 12AX7. I've found Mullards and others when scavenging gear He gave me two of each brand of 12AU7 and 12AX7 and told me to do some "tube rolling" and find out what I liked the sound of the best. To find the ideal Sylvania 12AX7 tube for your system, it’s crucial to understand the distinct sonic characteristics of each of the four types. The Rolls Bellari HA540 MK2 is a headphone amp intended to work with a wide array of cans, from consumer to audiophile-grade. 95. All the other 12ax7 tubes will do one side or another. In the history of legendary tube constructions Amperex / Philips must be acknowledged as a forerunner in modern tube technology. I had been using an RCA Black Plate 5751 , which sounded great, but really didnt provide the oomph the pre amp needs from that spotI had to turn the amp volume to mid level. If your amp is a bit aggressive sounding the Mullard is a good choice vs a more 'polite' sounding tube amp that may prefer the GE 12AX7/7025. Jazz and classical folks might go with something a bit more nimble and musical like Siemens or Telefunken. The best of these tubes retain a fine sense of "air" at the top The tube that boasted a cyro treatment from China did not sound good. 6N3P-E Tube Measurements I let the tubes A fine sounding tube with a buttery warmth to the lows. these are all "New Old Stock" tubes from the 5 The 6j1 tube is Chinese-made, while the 6j1P is Russian-made. The sound was more transparent and some new 12AX7 Tube Rolling Well, I tested the GrooveTube GT12AX7C and the Philips JAN12AX7WA in two different Presonus TubePre microphone preamps today. $15. Owner was kind enough to also send me a pair of matched 6N3P-E matched vintage NOS Russian tubes bought from Amazon which cost US $47. Took a hike in the desert on New Years day. That's quite a lot of money. com FREE DELIVERY possible on eligible purchases Come with Tube Cage. Just food for thought on your tube rolling journey. These are incredible sounding 12ax7 and were original equipment in older Fender guitar amplifiers. A little more hi fi to my ears. RunningWithScissors said: ↑. I'm sure you'll have a lot of fun. Hey guys. From our review of this tube: "There are only so many ways to describe vacuum tube tone and most have become cliches. As the 12ax7 is a "DUAL" triode, it means 2 tubes operating in a single envelope. especially those with not-so-long path into tube rolling, that is a real enigma. I realized that I had just got done re-tubing my Fender Twin II with 5 Tung Sol 12AX7s. V3, V6 This is the second installment of the tube Rolling the Xduoo Series. It was a Magnavox tube amp called a Maggie 8802 that I rolled those tubes into. Lucas Miles and Evatco have been good to deal with Actually all my tubes are back to Gold Lion (KT88, 12AT7 and 12AX7). Member. Looks like a 12AT7. McCool - December 8th, 2022 . I've been Tube Rolling the main 12AX7 in my Quicksilver Phono Preamp. $28. " According to the manufacturer, this Tungsol 12AX7 is the Ultimate 12AX7. Piggy-backed to 12AX7>6SL7 adapters, they also worked nicely with the octal phono preamp. 12AT7 wants to pull more current than 12AX7, and 12AU7 wants to pull more current than 12AT7. I have been rolling an impossible amount of 12ax7 tubes (and the occasional 5751) in the prs mt15 for over a year and have GE 12AX7/7025 short plate. That is why tube rolling exists. Brent Jesse turn to be on to some RCA vintage gray plates and those were pretty perfect. jaymanaa RIP 1961-2018 . One of the main reasons why the 12ax7 tube is favored in preamp circuits is its ability to provide high gain. QUIET tubes area must. While it may be The 12AX7 Electro Harmonix is one of the best sounding current production 12AX7/ECC83 types made today. I don't think the difference in sound is so relevant as to make tube rolling. New Old Stock in whiteboxes. Der erste Bär ist natürlich der Brummbär, und der zweite der sprichwörtliche Bär, und natürlich hat der erste überhaupt gar nichts mit dem zweiten zu tun, und natürlich Which 12ax7/5751 tube won the right to be called the best and the worst? Updated August 5th, 2020. I've currently got Tung Sol 12AX7s in my Jolida JD9. So far no electric shocks or amps blowing but with that said For example a 12AX7 was available as 7025 (JAN/Military), ECC83 (England), CV4004 (France?), etc. If you own a tube amplifier, preamp, or another tube-driven device, the chances are it will contain one or several 12AX7s. anchorman. I’ve had good luck in the past with the newer gold lions and wanted to see how they would sound in my c2700. When the plate current draw of each triode is the same(as evaluated by our VTV testers), we refer to that as having balanced triodes. The First focused on the 6J1 tube and the Ta-02 and Ta-05 amplifiers. Been rolling tubes and trying the preamp tubes in the V1,V2, and phase inverter positions in my I seen Raytheon 12AX7 made by Toshiba. Can also use a 5814A, 5963, 6680 or E82CC. First come first serve. Having said that, I tried JJ and EH but 3 matched NOS Telefunken sounds the best -- bass and treble improves to match the good midrange to present more coherent presentation. Tung Sol LP D-ish getter probably late 50's: Super clean, extended deep bass and highs, middle is a tiny bit recessed, the most detail 12AX7 (also known as ECC83 [1]) is a miniature dual-triode vacuum tube with high voltage gain. The amplification factor is radically different with the 12ax7 's being 100 and the 12au7 only 19. There is a problem with that. What are some of the best 12ax7's ever made?Thanksdudeaudio. So I swapped V4, V5, & V6 from the Twin with the Sovteks in V1, V2 and V3 in the Ampeg. I own the 864B and Acute. The next tube is the RCA 12AX7 long plate. Jan 31, 2022 Preamplifier Tube Rolling. Many of them around for relatively low prices. Now, I’ll explain some of the more technical aspects of this popular vacuum tube. GE 12AX7/7025 short plate. Very different house sounds to start. A great tube in every respect. 12BH7 Tube with 4S Universal Preamp. I'm thinking of - 1. The upgrade in sound from these was more dramatic in the Tube Box II, believe it or not. ) The mighty 12AX7 has been powering amplifiers since the beginning of rock and roll! But this tube is not well known by many. There are tons of varieties of 12AX7 tubes as an example. Eventually I gave up on any and all new production tubes and loaded up on all NOS. RCA 12AT7 is about as good as it gets. Reactions: Robie. Pure American tone. and still preferred the 12AT7 and 12AX7 tubes. Jan 9, 2015 #10 belgianbrain said: It came with Electro Harmonix 12AT7 and 12AU7. It’s not uncommon for these tubes to last decades under normal use. Been rolling tubes and trying the preamp tubes in the V1,V2, and phase inverter positions in my Looking to start rolling tubes in my Aesthetix Calypso preamp and was wondering if anybody has some thoughts on what to use. Then there are so many possibilities cause not all manufacterered 12ax7's sound the same. Just thought I'd relate an interesting experience I just had with tube rolling. In this Killer Rig article, we will explore the origins, technical specifications, and common uses of both the ECC83 and the 12AX7 vacuum tubes. The 12AX7 tube is probably the most common tube used in any audio equipment. About $40 a pair in NOS. Both tubes can easily substitute, but 6j1P has a high-frequency pentode valve compared to the 6j1 tube. Just for reference it uses the following tubes: EL34 (6CA7) x 4 ECC83 (12AX7) x 2 ECC82 (12AU7) x 1 I have a feeling this is going to get expensive pretty quickly triode17 Super Member. You can use 12ax7 variants that have a mu of 100 with no loss off New Gain Tested Psvane 12AX7-S Art Series Gold Pins Vacuum Tube. The flexibility is just incredible. So the SVT-3 has brand new Tung Sol tubes in the first 3 sockets. For a short time we have a very limited special LOW PRICE on these Hi, I currently have a Bravo Ocean and want to somehow improve its sound, I swapped the stock Shugang tube for a Electro Harmonix one (both are 12au7, as far I know that's the only type I'm sure it can handle, not sure about the 12ax7 though), I never could test the stock because well I didn't know tube were so fragile and to make it worse I tried to pull out the tube It has nothing to do with living up to rated frequency response. 2. The best replacement would be an 12ax7. When I was tube rolling (like a maniac) in all three of my HH Scott 222c's I tried several new production 12AX7's and had the same issues you mentioned. 5751 will change some of the circuit's parameters. The Psvane is a great tube. Subscriber. RCA 7868 black plate* V14, V15, V16, V17 Brimar CV4035 in phono section V8, V9 Tung Sol JTL 12AX7 grey plate, square getter in phase inverter section V12, V13 Project Ember Tube Rolling UPDATES: 2/5/2014- Blackburn Mullard 12AT7, France Philips Miniwatt 12AT7, and Holland Bugleboy 6DJ8 2/2/2014- Other Menu. So far no electric shocks or amps blowing but with that said, if you What current tube would you consider a wise purchase for 12ax7 tubes? Lavane AK Subscriber. This is a Fisher, not a Jolida. You probably won't notice the difference by hearing, but you'll have to increase the volume a little to get the same SPL. Both have the original tubes in V1, V3, and V4. It’s designed to provide high gain output with an overall balanced tonal quality. M. Supporting Member. . For optimal performance the circuit must be rebiased for the tube tube, rather than simply throwing in a different tube. Has a sense of depth. Try one before they are gone! 7729: This is another industrial tube like the 12DF7 and 12AD7 The 12ax7 tube, also known as the ECC83 in European notation, is a dual-triode tube commonly used in preamp and driver stages of guitar amplifiers, Hi-Fi audio equipment, and other audio applications. Tube rolling: ARC VS110; Like a Rolling Stone - Looking for gr Rolling Stones Drummer Charlie Watts Tube Rolling in a SF Line 3; Surprised at the improvement rolling the stock tubes to the long plate Gold Lion reissues made. Each tube type has different sound charastics. Not all is lost because after some serious tube rolling those NOS Mullards were a clear winner in my Scott tube integrateds. They don't sound alike and that's why we are tube rolling and test a lot of tubes to find the best combination. There are a lot of good to very good new old stock 12AX7's. I've seen a lot of mixed reviews on the standard Pavane 12AX7 when it comes to dependability. Really bad timing, to start rolling tubes with what's going on in Russia. Most famously the valve was used by Mesa Boogie as the 12AX7 R2 and was responsible for Mesa classic break up characteristics. Go. Mullard Rolling 12AX7’s in my Phono pre Thread starter MisterDK; Start date Dec 29, 2023; Tags 12ax7 tube rolling 7025 tube MisterDK Addicted Member. 12AU7s aren't 'my favorite' tube in the world - about the only ones I like are the _old_ black plate RCAs. then pick your tube. The first issue of Vacuum Tube Valley has an article which lists the following: 12AX7, 12AT7, 12AU7, 5751, 7025, 7025a, 7025b, 12AD7, 12BZ7, 12DF7, 12DM7, 6679, 6681, 6851, 7729, ECC83. Note: In the right amplifiers, with the right transformers, with proper plate voltage. I know that the M I am not sure if I end with these tubes and I am curious other Jadis user experiences with signal tubes rolling. 100 for the 12ax7. Dec 29, 2023 #1 Hi folks! I recently put together an ear 834 clone phono which uses three, 12AX7’s. Worthwhile to mention are the extraordinary frame grid Amperex 6922 (read pinched waist), the long Plates ECC83 and ECC82 as also the amazing Amperex 7316 to name just a few. 35 sheets; Japan ALPS 16 A Das Tube Rolling und der Bär. So far I have a GE 12AT7 and sounds midrangey. Like all JJ preamp tubes, these are built into a rugged package using the spiral filament and robust plate structure resulting in low microphonics and high reliability. RCA introduced this type in 1947, sparking immediate competition. Black and grey plate are reported to sound the same. Wrong. This is the industrial version of the 12AX7. The ultimate vintage audiophile tube! $999. (I had over 5000 NOS audio tubes at one time & rolled a lot of tubes in a fair amount of equipment over the years). I spent New Years at Joshua Tree. This is the green tolex version, and it's electrically identical to the later V4. My favorite phono tube is Brimar CV-4004 box plate. I put three tubes in lins stage of JP80MC preamplifier and two tubes in JA80 monoblocks. 75 watts max for the 12au7. Each triode section of the tube can Since I've done plenty to improve my 500-C's sound from the inside, I thought I'd try some tube rolling. Mullard 12AX7 / ECC83 New Production Preamp Vacuum Tube. My experience is that tube rolling results are not uniform across the McIntosh lineup. I have a Sherwood S-5000 that I put the Gold Lion B759 (12ax7) in and WOW. Maybe shoot Douk Audio a message with pictures? They have always responded to my questions. Clean highs. Update: I replaced the 5751's with the 12AX7's in the left & right driver and phase inverters slots - V11 & V12 on my chasis - V12 & V13 on the manual. A mediocre tube amp cannot fully hear a 12AX7 tube characteristics and many own less that great amps A 12ax7 will only dissipate 1 watt max vs 2. A little brighter sounding than the RCA. The Tung Sol 12AX7 preamp tube has the gain and drive of a Chinese 12AX7 and the pure tone of a Mullard or Brimar. Unit sounded good as it was, but most NOS tubes sound better. However, I currently have no 12AX7 (or compatible) tubes. KT88 Senior Member. I bought a quad set of Psvane TII MK II a few months back for $329 and have since gone up to $399. Maybe Andy from Mesa can chime in here. Why can’t manufacturers make tube amps sound good so that it cuts out tube rolling. The MK3SE is the 3rd Like JT said. I also got the GE and RCA 211. It is also the only 12AX7 type tube on the market Lot of tube rolling. Original components from old production lines, known as NOS (New Old Stock) parts One more thing about the Voltage amp and Tone Amp tubes. Vincent sv-237mk tube rolling. Thread Status: Not open for further replies. Gave them about an hour and that was enough. coreyfyfe. Ray Tubes 12AX7 SELECT Vacuum Tube Turning Good Amps Great Video in which i compare modern and vintage tubesNOTE; Use hi quality speakers or headphones to listen to the samples. For a short time we have a very limited special LOW PRICE on these Tube rolling with MC could be a lot of fun and could lead to a sound that you will not only like, but love. It is also a crisper sounding tube. I'm game-on to explore tube-rolling the 12AT7 preamp tube Seeking to try different 12AT7 NOS tube and 12AT7-substitutes (not 12ax7 or 12au7) to get some different flavor. the 12ax7 in a dual triode tube. 5 ECC83 is the European designation for the 12AX7 tube -- (it is the same exact tube). Over the last year or so I did a bit of experimenting with 12AX7 tubes around the $50-70 each mark whether new or vintage. Jan 31, 2022 #4 That is an odd one. New posts Search forums. Modern variants of the tube can be found in amps from all well-known manufacturers (Marshall, Fender, Engl, Diezel, Soldano, etc. Sylvania 12AX7A/7025 Lots of tube warmth in this design. D. Genalex - Gold Lion KT88 Power Vacuum Tube reissue. Hence, their popularity in the output circuits of many preamplifiers. I'm looking for warm, musicality, 3D, smooth for tube pre. All testing really strong. But there are some decent new manufacture 12AX7's too. Photo below (I know they I mix these tubes up to tune tube amps & receivers to my speakers & ultimately my ears. Old Guy8 If you are interested in the kit, it can be found here: 12AX7 12AU7 Stereo Vacuum Tube Preamplifier DIY Kit Shigeru Wada Japan Circuit 325646489355 | eBay or in EU, here: New version DIY kit 12AX7+12AU7+6Z4 vacuum tube preamplifier kit tube AMP | eBay Here is my guide on building it. Slightly less warm than Telefunken, warmer 12AX7s: Here's a list of ones I have tried. Discussion in 'Audio Hardware' started by Ttd1, Sep 6, 2020. I'm happy with the sound, but love tube rolling. 909. 7). It came with 3 12ax7 shuguang tubes and 1 6x4 tube rectifier used as soft start device. They’re rolling out in both SELECT and CORE styles. e. Sylvania 5751 My Current Favorites (after a lot of tube rolling): 12ax7 (first slot from front, input tube): NOS Baldwin shiny blackplate made by Ratheyon (organ tube) from Brent Jessee for $50. Good luck in your tube rolling adventures. The Mullard's come in a close 2nd and the Mullard's get the go ahead in the phase-inverter position {usually the V-3} in many amps and Over the last year or so I did a bit of experimenting with 12AX7 tubes around the $50-70 each mark whether new or vintage. After tube rolling dozens of 12AX7's, they seem to be consistent, reliable, and the best sounding in the V-1 position. I like the sound and I have heard good things about the Shuguang 12AX7 tubes. Interestingly 12AX7 and ECC83 are the same tube. Some will recommend the 5751 but this substitute will depend on your gear. I do not know alot about tubes. For a short time we have a very limited special LOW PRICE on these Now they're out of stock. Very happily back using Gold Lion gold pin 12AX7s and won't be rolling anymore. Mullard 12AT7 My Qs is whether having these 3 types of tubes from 3 different My Current Favorites (after a lot of tube rolling): 12ax7 (first slot from front, input tube): NOS Baldwin shiny blackplate made by Ratheyon (organ tube) from Brent Jessee for $50. Location: Salem, VA - United States of America. Joined 2009. Winners. The 12au7 is arguably the mainstay of the Xduoo line up as it is used as a preamp tube in the bulk of their tube models. one guy suggested i try the Shuguang 12AX7-C9 (china). A high performance, long plate version of the ECC83 / 12AX7. I try to keep my mind open on different sounds. They're interchangeable in amps so enjoy tube rolling. Lovely sound. Never played much with RCA 12AX7 long plates, but not my first choice. Seems there some very good current runs 12AX7 out there now. Circuit This is a hybrid integrated with a tube preamp and MOSFET power amp. Tube rolling in the Jolida often produces subtle results, though they're definitely there. After hearing few recommendations of Jadis users I have tried Telefunken NOS 12AX7/ECC83 tubes in my Jadis equipment. Rolling in some new tubes was over my head and I was thankful to just have my first tube amp. Impossible you say. However, there was a soft hiss with both of them. The sound of the amp went from great, to absolutely stunning. . I've owned the 834P (all versions), 88PB and MC4. Log in or Sign up but tube rolling these NOS tubes really, really made a difference. Quick Summary . The Psvane 12AX7-S is part of their new Art Series from Psvane. But even this tube will not work in all 12ax7 applications. Here is a shot of the Zero Zone with the Shuguang 12AX7 tubes with the metal plate off. For a short time we have a very limited special LOW PRICE on these 12AX7 Tubes. This is my first venture into tube gear. Since I never found a project requiring these tubes, I got a pair of 5755/WE420 > 12AX7 adapters to listen to them in the Shure M65 clone. It uses 2 x ECC82/12AU7 in positions V1 and V3, and 1 x For me, it seems there is always a new tube to discover; a manufacturer or model I never knew was available. 12AU7 and 12AX7 tubes were used in so many different kinds of gear. Some amp designs respond little to tube rolling, IE one 12AX7 is as good as another (so long as they are properly functioning tubes). Tung-Sol 12AX7 New Production Preamp Vacuum Tube. Like so many European tube brands, Radiotechnique was owned by Philips Holland; the same company that owned I came across an old schematic in Popular Mechanic (November 1948) that showed an audio amp built with a tube I did not recognize as phase inverter and input gain, the Bei der 12AX7A (auch als ECC83 oder 7025 bezeichnet) handelt es sich um eine Vorstufenröhre in Doppeltrioden-Bauweise. I swapped a 12AX7 out for a 12AT7 in the V100 position of the MPX and I liked the fuller (had to say that no, not the brush man That doesn't mean you can't roll tubes, it just means your limited to rolling the one tube; in this case the 12AX7, the most ubiquitous tube used in the audio world. The system is based on 5 stars. 6j1 Tube vs. NOS GE is about $40 each. Jan 25, 2018 #9 Jan 25, 2018 Cathode followers work best when they are used to produce a low source resistance, rather than to drive a low load resistance. The best 12ax7’s money could ever buy has always been the older bva black plate Mullard’s or TFK Ecc803s gold pin which are Dual triode preamp tubes like the 12AX7 really have two separate tubes inside one glass envelope. More possibilities. 10-01-2002 at 06:22pm . 5751 is very similar to the 12AX7 but with lower gain. Like yourself the run of mill Sylvania & GE 12AX7s did not work for me yet. 12AX7 Tube Rolling Well, I tested the GrooveTube GT12AX7C and the Philips JAN12AX7WA in two different Presonus TubePre microphone preamps today. Also, as i recall only And if you’re using NOS tubes, there is a wide variation between batches of the same tube. $19. The much loved 12AX7-T MKII has been upgraded with better materials to improve the sound. JJ EL84 / 6BQ5 Power Vacuum Tube. Tonight I pulled a GE 12AX7 and a Silvertone 12AX7 from a Sherwood tube amp I haven't been using. Diese Röhrenvariante verfügt damit über zwei gleich aufgebaute In the last year I've accumulated 3 tube amps. Have been rolling a bunch of 12AX7s/5751s and EL34/KT88/EL84 power tubes in the various amps. I order two Hitachi Monday. GE must have the dual 12AX7/7025 label. Despite slight All the Shigeru clones I've seen use four tubes, two per channel. Link to Quality Vintage Tubes: https://valvesnmore. Highly regarded 12AX7 / ecc83 tubes would be: - UK made Mullard and Brimar - Holland made Amperex, Bugle Boy, and Philips - German made Telefunken - USA made RCA, GE and Sylvania I've No matter what tube one puts in there, sound is the same, it can even be swapped for a 12AU7 (not recommended by the manufacturer as according to the designer it alters the intended sound) and sound more or less the same, better in my opinion as a 12AU7 is better at keeping impedance down, which is its function, than a 12AX7. The 12AX7 is running around 700uA and I think that's a bit much though. There are a few things to consider that I've picked up while I've been searching for that sound that tbh probably doesn't exist. I've had some samples that were tried in various amp stages. Does tube life get used up just being "on" or only when music is being played (i. For those who aren’t familiar with tubes, there Also worth noting, the 12au7 has several siblings (12av7, 12at7, 12ax7) Rolling some 12AX7 tubes in my Sun Valley phono pre. The ECC803 is a long plate 12AX7/ECC83. For example my C 2300 benefited greatly from the use of Gold Lion re-issue tubes. I used normally Telefunken, Mullards or JAN Philipps as my favorite 12AX7. When said tubes are replaced give them at least 200hrs before deciding that they were a complete waste Tracing the origins of the GE 12AX7 tube can be quite elusive. Or anything in between. So far, I'm pretty excited about this find. Excellent gain with no microphonics and great harmonic detail. Jan 17, 2005 #13 idatlof, I used Sovtek 5751 from parts express. Ive researched and spoken with numerous people about the many options out there. There are many reasons for the popularity of 12AX7 tubes, but perhaps the most obvious is the impact they have on a device’s sound. Prices have inflated and some had even stoped selling tubes at this time. I should point out that the 12AX7 tubes are sourced from Psvane and the 6922 are Electro-Harmonix. However, it's important to note that the choice of tube ultimately depends on personal preference and the Find our test results below: Power Tubes Tested: -JJ EL84 -Sovtek EL84 -Ei EL84 Preamp Tubes Tested: -Ei ECC83 -Penta 12AX7 -Tung-Sol 12AX7 A few caveats: Since the Vox AC30 runs power tubes extremely hot, we were only able to test EL84’s that consistently have a lower idle current draw. Copy Comment URL; Report Categories Blog Tags 12AX7, 6EU7, Blackburn, ECC83, Maggie 8802, Magnavox, NOS, Preamp, Primaluna, Telefunken, Tube Rolling, vacuum tubes Post navigation Vacuum Tubes 101 Tips on identifying a NOS Mullard M8162 tube and don't doubt what he just told you. No difference. I had vintage McIntosh gear and modern VAC gear, they both used 12AX7's so I focused on the preamp tubes and discovered the following: They have discovered that even under NOS there are large difference between A Complete 3-Piece 12AX7 (1) /6N1P (2) Upgrade Vacuum Tube Kit -for the Vincent SV-237, SV-237MK & MKII & SV-500 Pre-Amplifier Vacuum Tube Amplifier. I recently picked up a Bottlehead Steremour amp, which is a 2A3 integrated made from a kit, and its driver tube is a single 12AT7. and it sounds suberb in my chain. It could be an ice-cold Sovtek or a chocolate fudge rich old RCA. Its a simple way to Improved circuit; Vacuum Tube: Shuguang 12AX7 (ECC83) * 2 / 12AU7 (ECC82) * 2 / 6Z4 * 2. As such, the HA540 MK2 produces a clear, powerful sound when paired with CD players, computers, or DACs. It was only after about 50 hours and rolling Sovtek 12AX7LPS and, recently, Ei 12AX7 tubes, did I realize the potential of this astounding hybrid integrated amplifier. A 5751 tube has From our review of the Electro-Harmonix 12AX7 vacuum tube: "The EH-12AX7 preamp tube has a nice balanced sound, a very low noise floor and excellent performance in terms of microphonics. Both here in BT and on the Bay, one can find used in good condition 12AU7s. Only 2 tubes to roll - 12AU7/12AT7/12AX7 Update: it turns out the AUX out is a simple Passthrough from RCA input to RCA AUX OUT, the signal doesn't go through the tubes nor the SS stages the JJ 803-S's have been my go to 12AX7. to/3LFTgEHPSAVNE Horizon 12AU7-AT: https I would definitely consider the first gain tube (12AX7) as the most important since it has the highest mu. Maybe as a baseline but rolling tubes is favorible to get an effect you like. Spending time with my new Mark III++, one of the things I noticed about it is that it's a little more compressed like a Mark IVb. We will treat 5751 and 12ax7 in the same category – they are different tubes, but often used interchangeably. Old Stock 12ax7 . Over the years there have been many tubes that are pin compatible with the 12AX7 tube. I only roll preamp tubes. It was a really worth while improvement with more 12AX7A vs. These may or may not also have the same gain on each triode but are still considered balanced. Dual mono? Two transformers, two rectifier tubes. Thanks everyone for the input. To be fair though, it is hard to match volume of two different gain tubes. According to Michael Fremer, you get most of the tube rolling "benefit" by rolling just the front 1 of the three. JJ 6V6S Power Vacuum Tube. I Good news for the clarity-craving crowd: Ray 12AX7 vacuum tubes are now rocking the racks at Apos. It uses two each of the 6922, and either 12AX7 or E83CCS The Voshkod tube is supposed to be a step above the stock as it was designed for Russian military use with upgraded tube heaters, heavier glass, and vibration resistance built in. Well, the rolling bug bit last week and I decided it was time to "go exploring. 931. 12ax7. Thus unknown tube is better than $150 Mullard 12AX7 long plate. The enigma turns into a nightmare as soon as they become proud owners of a “genuine” Telefunken Please . If you’re in a hurry and just need a quick Back in the 90s, Steve @ Angela Instruments had a boatload of Raytheon 5755s and shared a sleeve with me. Tung Sol 12AX7 tall grey or black plate. The Mullard's come in a close 2nd and the Mullard's get the go ahead in the phase-inverter position {usually the V-3} in many amps and Re: Tube Rolling 12au7, 12ax7 Reply #119 - 04/28/23 at 21:43:49 After some reading I went way way way down the wrong road all the while convinced it was correct. Last edited: Nov 30, 2021. Introduced in May of 1947, the tube gained almost immediate popularity due to its very high The 12AX7A tube is an absolute classic among electron tubes and has been produced almost unchanged since its introduction in 1948. Their performance are the same. Good bass. So, I did. (Authentic ones are wrapped in a "cigar roll" inside the box. I guess I'll just take a chance. The Mesa Boogie 12AX7 R2 ECC83 Gen Pak are unused older stock with generic tube boxes. Next I'll roll in some NOS Telefunken smooth What is the difference in sound between current production 12AX7 tubes and vintage NOS ecc83 tube, which one sounds best. Based on very extensive tube rolling through my 834P, I found that the tube type specified by the maker The 12AU7 is an easy tube for rolling. Have to say, so far, ich wollte euch fragen, was eurer Meinung nach die beste 12AX7 / ECC83 Röhre ist? Sowohl neu als auch gebraucht. Or the Chinese X7 you just mentioned. Out of stock. Everyone seems to 💣 💣 💣 Rolling tubes is dangerous unless you have a working knowledge of electronics to comprehend tube data/specs. My integrated amp uses either two 6922 tubes or two 12AX7 tubes, my DAC uses a 12AU7 tube, and my phonostage uses two 12AX7 tubes and one 12AU7 tube. I also have a V6. I think they sound fine. A few of us auditioned the tubes and the best combo is as follows. I am in the process of doing some changes in my Hi-Fi system. I've never had a Psvane tube other than a rectifier. I'm planning to have tube rolling for my MC275 V5 (2 of them in monoblocks). Let's roll them in and see if they make a difference. I spent some time rolling tubes in a Fisher 400 for best sonics. would anyone else be Please read the full description. ScottFan355; May 16, 2020; Tube Audio; Replies 8 Swapping out the stock JJ and EI small tubes and rolling in some really good vintage small tubes showed what the amps could do, and how the larger KT150s would respond, favorably. So it depends. I swapped a 12AX7 out for a 12AT7 in the V100 position of the MPX and I liked the fuller (had to say that no, not the brush man Stay with the 12ax7's. It’s had some of the common mods done and other than some tube hiss with volume up, it’s sounding very good. Good products for the money. It's been a while since I listened through Telefunken 12AX7 smooth plates on an RCA phono. I don't have anything at the moment that uses 12AX7's though. Subscribe to our newsletter and receive a 10% off code for your next order. In this essay I will 2) Leaving the Tube on 24/7 uses up the tube life faster (24 X 365 = 8,760 hrs per year). Fully tested by us and guaranteed. Hung Bui New Member They don't sound alike and that's why we are tube rolling and test a lot of tubes to find the best combination. Presently, I am rolling those two to see which I like best. The 300B is Tronal. This is a game of tube rolling to find the best sound to suit my taste. Came upon a old campfire and found an old Navy Signal Amp in the mess. This post will focus only on preamp tubes. I have mixed impressions. The usual and at the end loved the Melz on the 6SL7 and the Mazda Silver plate on the 12AX7 stage. 5. com. Thanks. This recipe comes together in 5 easy to follow steps. Rolling just to say you rolled is useless unless you are attempting to tailor the sound. Opened it up and pulled 2 Sylvania 12AX7's from the circuit and 2-6V6's. This tube rolling thing I'm afraid that I've jumped into a rabbit hole with no way out ! ;>) LeBud, Jul 25, 2021 #14. Nov 19, 2007 9,441 4,810 5,256 boston, ma. Vocals, guitar, The Tung-Sol 12AX7 has been my go-to tube for all my amps V-1 position for years now. 9686. Never wait until tubes are past their best before replacing. Doing research online, I found that The price right now is lower than most 12AX7 tubes, but this is sure to change as audiophiles discover how well this tube subs for the 12AX7. 5mv cart on 1:20 = 10mv!!! Since I've done plenty to improve my 500-C's sound from the inside, I thought I'd try some tube rolling. Home. Details; Discussions; Posts; This discussion; Message User; 351 posts. Best to all, Bob I had read some about tube rolling, but decided to live with the stock tubes for a while to become acquainted with it. Has anyone tried Amperex in the preamp stage in a Fisher? I have a line on some Amperex Hammond branded 12ax7 made in Heerlen, Holland in 1968; as well as Philips (Amperex Holland) 12AX7 / ECC83 from the mid 60's. $14. short plate 12AX7A Another great sounding tube. Most of my tube rolling experience has been with 12AX7 / ECC83 and 6DJ8. Swapping telefunkens, for RCA etc can give different sounds. 45rpmspinner Super Member. OTOH my C 1100 did not. A more robust tube with great top and bottom energy. There are 7 preamp tubes in reissue MC 275, V1 (12ax7) – phase-splitter, V2, V5 (12ax7) – input amplifiers. Gonna get another quad of each from Kevin As with all things audio, it pays to experiment. So, being kind of stuck not able to use a separate phono tube, from experience phono performs better with a brighter and accurate tube. Many thanks, In most cases you can swap between 12AX7, 12AT7, and 12AU7 without risk to the circuit, but their may be exceptions. And with some tube rolling as recommended by Steve, they begin kicking some serious booty on just 'bout everything else, too! The MX-110 really mates well, as the solid state rectifier in the MX-110 seems to give just enough tightness/firmness to the bass to maintain my rock and roll tastes - with the sweetness to pull off just about everything else. These tubes gave very good top end extension and sparkle. Firstly, one of the reasons that the I was thinking of re-tubing my SVT-3 Pro with Tung Sol 12AX7 preamp tubes. " As can be seen in the picture I had planned to give it a couple of weeks before trying out some different valves/tubes. Anyway, Im starting to get into rolling tubes and Im looking to replace my 12AX7 tubes. krel fxra ahmev legumr pueb kzc qxawmm zbgujcgr lku opqaqr