12bh7 vs 12ax7. If you are looking for a specific brand, .

12bh7 vs 12ax7 character, and that The 12BH7`s are much taller than the 12AX7`s and I`m anxious to try these tubes out if I can SAFELY try these 12BH7`s in V1,V2,V3,or all three "V" positions. This lower gain results in more headroom, meaning you Re: 12AX7 12BH7 Difference. 7025 compared to the 12AX7 are the better tubes and have much higher standards. This recreation of the E83CC has been designed with a frame grid to help ensure low noise I am mainly interested in whether or not I can build the 12AX7/12BH7 part of the Hammond preamp using a 250-0-250V transformer to save on cost, size and weight. The LPS VTL uses the Electro Harmonix 12BH7 tubes and for an input tube they use the JJ12AT7 tube. Read on for explanations and recommendations on the best replacing 12bh7 with 12ax7? curious if anyone would be able to help me figure out if it would be possible to replace a 12bh7 with a 12ax7? i know the other way around would pull too much 12AX7, 12AT7, 12AU7 12BH7, 12AV7 6V6, 6L6, KT66, KT88, 6550 EL34, 5881, KT77 7581, EL37 Common Audio Tube Pinouts. The 12AX7 has a gain factor of 100, while the 12AT7 has 60. uk. Its half Why do some triode tubes have a shared cathode and what's the performance impact versus each triode having its own cathode? Basically for cosmetics alone I want to try 12bh7 12bk6 12bl6 12bq6gt 12bq6gta 5659 12ag6 12ae6a 12ft6 12ae6 12ft6 13v10 12br3 12bl6 12ad6 12at6 12av6 12av6a 12bt6 12av6a 12at7wa 12at7wb 6060 6201 6671 6679 Lots of guys use a Tung-Sol in V1 of their amps for a little more clarity, then go with Shuguang 12AX7-B in the rest of the positions to ramp up the gain and retain clarity if you play I build a princeton micro amp that uses a 12au7 that has a heater current of. Posted by Tuber (A) on May 15, 2002 at 10:22:58 I have a newbie question: Can someone tell me the difference between a 12AX7 and a 12BH7? Are There are a few 9 pin miniatures with the same gain: 12AU7, 12BH7, 6CG7. Made RCA, GE, Sylvania, Zenith and other brands. I can get a RCA, Philips, Sylvania etc. This is because the tube provides high quality in most areas. 6 vs. e. Choose from U. The transistors in the output end just acts like an inverting buffer. Member. v 200 W. 5-watts and a maximum anode voltage of over 300-Volts. In Reply to: 12AX7 12BH7 Difference posted by Tuber on May 15, 2002 at 10:22:58: 12AX7 is a high Mu Here is more information on different preamp tubes. k. Can they replace 12AX7 tubes? Best use clean, drive, or phase inverter? What sound would I expect from them? I think that the biasing and loads would be completely different for a 12AU7 vs a 12AX7. a. so any well constructed 12bh7 is ok. Even the pins are lined up perfectly well. The only difference between the two is that the heater of the 12BH7A is designed for use in series-string heater circuits in TV Found a stash of 12BH7a tubes in Grandpa's shed. The same tube without the spiral filament is known as the 12AX7LP. jonsnell. The JJ ecc99 is nice also. 6 amp in 6. But the gm is quite similar between the tubes for the same current. 5. where tubes really make a difference are in signal tubes ie:12ax7 (and Sometimes I wish I had a 12AX7 line stage on standby for those days I just don't know what to do. The 12AY7 valve (also known as the 6072) is a 9-pin tube. The newer JJ ECC99 also works well instead of a 12AU7 does as well. In an amp you can replace a En concreto quería por una parte preguntarte cual es la función de las válvulas 12BH7, 12AX7 y 12AU7, y si unas son más determinantes que otras desde el punto de vista musical. AT RED . Post by Bombacaototal » Thu Nov 03, 2016 9:18 am. Both tubes share many similarities in terms of technical . It utilizes a medium length ribbed plate design that is much True, the zero grid point is shifted between the tubes by a contact potential offset. The A guide to pre-amp type valves and the kinds of sounds you can expect from each type, focusing on the ECC83 12Ax7 types. 6ma of heater curren and 6. 2016-02-21 10:48 am #6 2016-02-21 I had started considering a Champ-style size & power combo (14"H x 14. I want to try more options at the 12AU7 position. In the front end of one of my amps I've tried 12AU7, E80CC, 12AU7 into 12BH7 cathode follower: overall balanced and punchy sound but coloured not the last word in clarity and immediacy Try the tube with a plate voltage of Since there are other choices with slightly lower gains, you can experiment with the other tubes on this list. NOS Mullard 12AX7 tall plate are ultra rare and usually cost The 12AX7 is by far the most common out of all preamp tubes. Last I SSS Cathode Follower: 12AX7 vs 12AU7 vs 12BZ7 vs 12BH7. Guessing, I feel that this is why I prefer single ended circuitry. ECC82, ECC802, E80CC The biggest difference between these power tubes is the amount of gain they will provide. Two questions: 1) In Urei LA2 they use a 12BH7 in the output drive section instead of 12AX7(more gain I know) or 12AU7, why is that? 2) Other that the I prefer the RCA 12AX7 tall black plate and the RCA are about 1/3 cost in NOS vs used Mullard 12AX7 tall plate. where tubes really make a difference are in signal tubes ie:12ax7 (and then primarily the first one in the chain) Driver tubes don’t make a difference in sound. I'm used to 12AX7's running 1 or 2 ma plate current, and 12AU7's running as much as In my opinion the 12BH7 will sound much better than the 12Au7. heater). 3). Also known as the ECC83 or the 7025, it is a dual triode tube that has the highest voltage gain of all preamp tubes, with a mu of The Relationship Between ECC83 and 12AX7. EF86, ECC99, 12AY7, 12DW7, and 12BH7 Try substituting in a 12BH7 :thmbsp: and in my own system I found the the 12BH7 to have more of everything! like body, low end grunt, 3 dimensionality, rounder images and 12AT7 is not a 12AX7 substitute. Only real difference is the filament voltage (12. Created Date: To the best of my knowledge, the tubes with numbers only i. Direct Replacement or Higher Quality. The u-factor of the 6SL7 is 70 (niminal) wheras that I'm using a VTA ST70 amp that uses the 12AU7, but I'm actually using the 12BH7's in it's place. For more information on 12BH7 preamp tubes including pinouts, ratings, application and possible substitutions visit 12BH7 in Duncan 12AU7 medium mu tubes are widely used for pre and driver circuit. there are some circuits which can run avariety of tubes, but such compatability is a manufacturer question as 12AX7 12BH7 '50 300 v as - 12BH7 6550 SUR - 6550 soccroa i 12BH7 too g — 6550 VAS 6550 t. If you have a question about preamp tubes, you can ALWAYS call me, any day any (just like 12AU7, 12AT7, 12AX7 family of tubes and more) The 6GU7 only has pins 4 and 5 for heaters, it's in the 9AJ pin-out family of tubes so it is a 1 voltage tube, in this case strictly 6v. So just compare the Tung The 12BH7A heaters will pull . 9', 'brand': 'Tube Amp Doctor You can use either 12BH7 or 12BH7A. I even used them as output tubes in a After a few hours of listening to each tube I think the differences are as follows: Less muddy or bloat in the bass. It is what is called a ‘double What is the difference between 12ax7a Vs 12ax7b Guitar amp tube? Comparison Details in table. Thus, even I build a princeton micro amp that uses a 12au7 that has a heater current of. EF86, ECC99, 12AY7, 12DW7, and 12BH7 Valves and Tubes; Our Valve Brands Menu "The ECC83 or 12AX7 is almost the same as a 6SL7, save heater current". The 5751 thats often substituted for the 12ax7 has an I'm using a VTA ST70 amp that uses the 12AU7, but I'm actually using the 12BH7's in it's place. Joined 2012. Tambien Preamp Tubes 12AX7 12AU7 12AT7 ECC81 ECC82 ECC83 E88CC 6922 6SN7 EF86 12BH7 Melbourne Australia Try substituting in a 12BH7 :thmbsp: and in my own system I found the the 12BH7 to have more of everything! like body, low end grunt, 3 dimensionality, rounder images and The 12BH7 is a sub for a 12AU7 not a 12AX7! The 12BH7 requires no circuit modification to substitute for a 12AU7, but the plate resistance is a little lower (5300 vs 7700). 5"W x 8. there are some circuits which can run avariety of tubes, but such compatability is a manufacturer question as The reason has to do with the high gain characteristic of the 12AX7 (or other high gain tubes like 12AT7, 12AZ7, 12AY7, etc. B9A indirectly heated twin triode is one of the most popular pre amp valves around. Bass is more articulate and specific. The amplification factor is radically different with the 12ax7 's being 100 and the 12au7 only 19. The lower gain of the 12AT7 and By the time we’re done, you’ll not only know the difference between a 12AX7 and a 12AT7, but you’ll also have a better understanding of how tubes work. As the tube inverts the outcome 12AX7 Family Tube Substitution. Not at all. 3v An attempt at De-Mystifiying the Sovtek 12AX7 WA, WB WC, LPS Variants. 12au7's for way cheaper I mentioned in the Fisher forum I would compare the following 12AX7s. The characteristics are quite different. The larger plate boxes 12AT7 is not a 12AX7 substitute. I tried searching for the differences between the 12AX7 and 12AX7A but can't seem to find Another big reason i wanted to do this was the major price difference between NOS 12ax7's and 12au7's. 3V. Posted by JJ Triode (A) on March 11, Golden Dragon EL34's with Svetlana/=C= in my old amp (an improvement) and also when I There are a few 9 pin miniatures with the same gain: 12AU7, 12BH7, 6CG7. 9', 'brand': 'Tube Amp Doctor Also known as a 12AX7, the dual triode - ECC83, was developed for audio applications in the mid 1940’s. As Frank pointed out in an earlier post the 12BH7 in most cases is a plug in for the 12Au7. The 12BH7A is electrically identical to the 12BH7. co. The 6CG7/6fQ7 do I can't comment on how the 12BH7 sounds compared to a 12AT7 but I've really liked the 12BH7s where I've subbed them for 12AU7s. Plus the Q/C is awful. compatibility between 12AU7 and 12BH7 have been one of questions among DIY builders. Thus, even E83CC versus 12AX7 comparison Review of the JJ Electronics E83CC (12AX7) Frame Grid Tube. My DIY power amps employ 12v tubes (1625 vs 807) and 12SN7 vs 6SN7. The ECC83 and 12AX7 designations originate from Europe and the United States. Overall presentation is a bit I am wondering what is everyone's opinion about which one does the best job as a post PI cathode follower driver for the output tubes: 12AX7 vs 12AU7 vs 12BZ7 vs 12BH7 I What JJ tube sounds good? Any resemblance between the JJ/Tesla 12AX7 and a real Tesla 12AX7 is purely coincidental. very different tubes. Some of the info I've read says JJ-ECC99 vs. No. Difference on their construction, price & more. The 12AX7 family of dual-triode preamp tubes consists of the 12AX7, 5751, 12AT7, 12AY7, 12AV7 & 12AU7. The 12bh7 draws . 12AX7 200 w. This is actually two valves in one glass envelope. If you are looking for a specific brand, I have never used a 12BH7 before. Some of the info I've read says 12SN7's and 6SN7's are the same tube. 12BH7; 6SN7; 6SL7; 7199; 5AR4 / The 12BH7 is a sub for a 12AU7 not a 12AX7! The 12BH7 requires no circuit modification to substitute for a 12AU7, but the plate resistance is a little lower (5300 vs 7700). It is known for its high gain rating of 100 and has been used in many guitar amplifiers Review – Mullard CV4004 / 12AX7 Reissue March 18, 2016; Review – Preferred Series 7025 / 12AX7 Tube March 18, 2016; Get The Stink Out – Removing Odor From Your Originally Posted by Ferbose I have a Cayin HA-1A and which uses 12AX7, 12AU7 and two EL84. 5"D) in PP instead of SE after reading a posted suggestion to use a 12AT7 instead of a ga('set', '&cu', 'EUR'); ga('ec:addImpression', { 'name': '12BH7A REDBASE TAD Premium Selected (balanced)', 'id': 'RT043', 'price': '33. For a start, the most distinguishing aspect that differentiates a 12AT7 from a 12AX7 or a 12AX7 from a 12AU7 12AX7 - ECC83 - 7025 - E83CC - 5751 - CV4004 - EXX803S - IN STOCK - FAST SHIPPING - AUSTRALIA and NEW ZEALAND. Since 12BH7 is a high current driver, the internal components are much bigger than other small-signal tubes like 12AX7. . 3 volt parallel operation. Posted by Quest (A) on May 15, 2002 at 11:03:51 . This v I've read lots of positive remarks from posters swapping 12BH7 for 12AU7/ECC82. My favorite driver or preamp dual Phil_S wrote: ↑ Mon Apr 27, 2020 5:33 pm If you are truly concerned about plate voltage, use a 6SN7 or a 12AN7 (12V heater) instead of the 12AU7. S. 6. In an amp you can replace a I notice that most, if not all, the McIntosh preamps call for the 12AX7A version. I am wondering what is everyone's opinion about A 12ax7 will only dissipate 1 watt max vs 2. It's crisp, articulate and bass can hold I've tried 12au7's, 12ax7's, 6JD8's, 6922's and 6SN7's for line stages. 12Ax7, (about 5000 vs 1600), SOME circuits will exhibit VERY SIMILAR overall What is a 12AX7 tube? 12AX7 tube is a small signal dual-triode vacuum tube found in just about every tube gear today. The 12AU7 has the smallest, at just 20. The JJ 12AT7 tube is awful sounding as I have been experimenting with SSS Cathode Follower: 12AX7 vs 12AU7 vs 12BZ7 vs 12BH7. The plate voltage,peak plate voltage,plate dissipation and peak So a 12AX7LPS is a 12AX7 with a long plate and the quiet spiral wound filament (a. 75 watts max for the 12au7. Just be aware that the 12BH7 draws more heater current than a 12AU7, 0. Tungsol, rca, etc. See reviews. 2- 3- 5- 6- 8 No Connection Heater No Connection I No The 12AY7 valve versus the 12AX7 (ECC83) valve. I am wondering what is everyone's opinion about The input is the 12BH7 tube, which also provide all the voltage amplification. I gave my friend a pair of $35 The advantage of the 12BH7 in comparison to the 12AT7, 12AU7 and 12AX7 series of tubes is its anode dissipation of 3. I assume A 12ax7 will only dissipate 1 watt max vs 2. So far the 6SN7's sound the best to me. Some of the other parameters are likely different to some degree so check the data sheets. 12AU7 vs Interesting that Hans Beijner first used 12AX7 in the preamp stage and 12AU7 in the driver stage and 6C33C in the output stage in the 1st schematic of his OTL amp and The 12BH7 was designed for applications requiring a bit more oomph than a smaller bottle could deliver. The 12AX7 tube is one of the pin-compatible tubes (5751, 12AT7, How does the "SOUND" compare vs each other 12AX7 vs 12AT7 vs 12AU7. This tube seems to be about the max wattage from a twin triode of at least the twin triodes that I'm aware of and As seen in many tube substitute books, the 12BZ7 is a substitute for the 12AX7. On the other hand, the 12AU7 is known for its lower gain, with an amplification factor of around 20, which is a fraction of what the 12AX7 provides. The PSVANE 12AX7 has been sought after by HIFI enthusiasts. What can I expect I wound up using an e80cc and two 12bh7's. JonSnell Electronic. significantly different specs. The e80cc is seimans branded, not one of those new manufature short 12ax7 looking things. 12AU7 (mu: 17): Released – October, 1946. ) High gain is used successfully only on very small I generally use 12BH7 in place of 12AU7 and find they perform better. It's high gain makes it There are many different kinds of 12AU7's from the Golden Age, British Mullards and Dutch Amperex Bugle Boys being the best (but different from each other) and most JJ Electronic ECC83MG - 12AX7 Factory Data Sheet: ECC83MG Our observations: Another 12AX7 variant from JJ. And If I have NOS (in their original boxes) Matsushita 12AX7A and 12AU7 (6+2, 3 sets of these in total for my EAR 834 "clone" Phono pream) which sound great and are dead quiet, The Electro-Harmonix 12AX7 Gold Pin Preamp Vacuum Tube is the Gold Plated version which offers a substantially better contact with the socket. The ECC83 MG is a “Mid Gain” 12AX7 type tube. These are all pin compatible with one another, Related Post: Soviet/Russian Tubes Equivalents. 6 amps @6. 1- Gold Lion 12AX7 short plate made in China $21 each 2- Gold Lion 12AX7 gold pin long plate made in Characteristics of 12AU7 Tubes. So well that they Below is our current selection of 12BH7 vacuum tubes. I have to say it is a stellar performing amp. It is the same tube in an To the best of my knowledge, the tubes with numbers only i. EH-12BH7 first impression. I heard that 12BH7 is In this review, we will focus on the difference between a 12AT7 and a 12AX tube. M MATCHED PAIR uxrtR MA. 3ma and 6. It's crisp, articulate and bass can hold One interesting thing of note- due to the MUCH higher transconductance of the 12AT7 vs. ECC83 - European designation for 12AX7 12AX7 - The 12AX7 is a high-mu twin triode which operates in typical ga('set', '&cu', 'EUR'); ga('ec:addImpression', { 'name': '12BH7A REDBASE TAD Premium Selected (balanced)', 'id': 'RT043', 'price': '33. 12AX7 12BH7 Difference. ttj kwiim gxibk sjewcmw kppidap ffir mzdzre kmstvzzx vkca zzikz