E88cc vs 12au7 forum. 12BH7 are way more superior vs a 12AU7.

E88cc vs 12au7 forum Next up Seimens gold pin E88cc that Kevin from Upscale suggested with the same mullard 12au7. They help move you out from that warm wool coat to a more open and extended sound Structo wrote: It appears that the E88 has a gain factor of 33. For the 12au7 type the Mullard seems well received but I can't tell all the differences as it's a bit confusing. Thats why I started with 12AU7, but then found ECC88 that I think is able to deliver output impedance of ~76R vs 12AU7 ~402R (according to Cathode Follower Output Impedance Calculator) Second link is promising as well. If you place an order for a heavy or bulky item over 8 pounds, First 12AU7s were shipped to Collins Radio and Collins reported the tube had too high distortion. The ECC88 takes 6. ECC81 - 12AT7 ; ECC82 - 12AU7; Mullard 12AU7 NOS vs Reissue. cornhulio. ECC82, ECC802, E80CC Lately I've been tube rolling 6922s in the gain stage of my Sonic Frontiers Line 1 preamp, and considering trying the BEL E88CC/6922 from Upscale Audio. AudioKarma Audio Forums. The 12au7 has a wire going to pins 4&5 (together) and to pin 9 Up for sale are the following tubes:All NOS tubesSiemens E88CC Gold Pin: $75RAM Tube Works 6DJ8: $256922 Russian tube, no brand, gold lettering: $25Sylvania (Conn) 12AU7 Long Plate, D Getter (pair): $35Siemens 12AX7, Forums. 6V It is paired with 2 RCA 12AU7 Black long Plates as phase inverters and 2 RCA 12AX7 Black long Plates as drivers of KT120s in a Jadis DA88S integrated. Type #3 - The ribbed plate tubes both had the "getter strut" on pin #2, and both were 12AU7 (they sound FANTASTIC, by the way) Type #4 - the short plate tube was correctly identified by several here as an ECC88/6922 Steve Hoffman Music Forums. E88CC Siemens RED DOT Low noise Vacuum Tube NOS . Nov 3, 2018 #1 Any opinion on sound quality between the 2. If you can elevate the heater supply a bit to cut down on that difference though, it should make the tubes live longer and be less inclined to develop hum. 6V, 300 ma ; Va max=300V ; Wa max =2W ; mu=27 ; 6211 : filament:12. Especially signal tubes. Not equivalent tubes, but sometimes E80CC works better in place of ECC82/12AU7. 3 volt only) CBS/Hytron 12AU7 (chrome plate retainer clips + square getter) CBS/Hytron 5814A (same internal details, equal to above) RCA 12BH7 (grey plate- equal to above in some circuits) Search forums. Also 12au7 vs 12au7a Thanks for any input! vinylkid58 Super Member. 55mA/V, and 600mA of heater current. Perhaps if time permits I should read up on what the specs of the tubes mean first. Its a very nice pre for the money. PSVANE Member. 5. If you can; beg, borrow, cheat or steal to get them. 1ma/V, and a filament current of 435mA. I have a Golden Tube SI50ii and somewhere I read that the 12AU7 tubes can be replaced with 12BH7A tubes for a better sound versus paying more for Telefunken 12AU7s. In a signal level circuit, a poor choice (say a 12AX7 in place of a 12AU7) will probably distort, but not likely burn up anything. Re: 12au7 vs 12ay7 Amplification factor, 12AX7=100 12AT7= 60 12AY7 = 44 12AU7 =17 and 19. It is often used for Hi-Fi applications. Right now in fact I'm listening through my power amp with a 6DJ8 frontend (a Tesla late '70's production PCC88 actually), and the amp sounds superb, really lush and wonderful with excellent depth and stage, but sub in an Electro Harmonix 6922, and the amp turns very ordinary. 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 reliable. A more suitable E88CC UL-cascode will lower THD to maybe 1/10. I think I'd like a PrimaLuna Dialogue some day. c/ zyx airy 3 I have been going through boxes of valves (tubes) which I have had stored away for about 30+ years and discovered 8 No. 12AU7. 6 V - 12AU7, 12BH7, E80CC, (12SN7 with 6SN7 to 6922 adapter). the selected Electro Harmonix gold pins has so similar high end performance but in different style compare with some big brand NOS. Another thing the one-triode stage will have a Zout of maybe 4k while the cascode will have the same Zout as Rl=91k. X seams on top = a Philips family tube - that's a good start. The amplification factor is radically different with the 12ax7 's being 100 and the 12au7 only 19. ianmedium Member. I. Equipment Forums. 3ma and 6. Bass is strong and tight. Also known as an ECC88. Okay, well try asking the experts in this forum, and if you get a string of gasps. 3V. (inflated) prices Can your amp run either or? They serve the same purpose though, both are preamp tubes. For a single ended preamplifier, like the one you started with, this link may be useful: DIY 12AU7 Tube preamp I mentioned in the Fisher forum I would compare the following 12AX7s. Thread starter JMicro; Start date Nov 3, 2018; JMicro New Member. But then I would also say it is hard to make it sound the best in the world as well. Menu Log in Register Mesa Boogie Engineering Products. 12au7 tube identification? Gf2 = second iteration of 12AU7 (ECC82) 65B4 = Eindhoven, Holland made. The bass was noticeably stronger. 12AU7 is the American designation and CV4003 is the British designation. The 6SN7 looks even more linear than the E88CC. I can only recommend 12au7 because that's what I use in both my bottlehead crack and musical paradise mp301 MKIII. 9 pounds usually ship FedEx Ground or USPS Priority Mail. arts Addicted Member. Thread starter BillyB; Start date Feb 23, 2013; B. Audiogon The world's largest high-end audio community. the the idea of the swap came from the Golden Tube Yahoo Group forum. airtime; Feb 26, 2017; Tube Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Vacuum tubes such as 7308 and E188CC are considered some of the very best but are less common. But I think the same would prob occur with a good 12AX7 vs a lousy one. Sep 9, 2009 If you're dying to try some other tubes in place of the 6211's, I looked it up and they have the same pinout as the 12au7, 12ax7, 12at7 but the closest match would be a 12au7. HIFI4ALL. The Siemens 6922 I tried were microphonic, and two lots of Voskhod Rockets mid 70s NOS have gone 6sn7 vs E88cc I agree, many newer components using 6dj8s are poor sounding. I also really like the Tungsram 6922/E88CC tubes. Home Forums > Discussions > Audio Hardware > 6922 Tube Recommendations. My question is how does this seemingly huge difference in gain translate to real world volume. 6ma of heater curren and 6. 12ax7 is high gain low current 1/15 of The point is that the 6DJ8 family (6922, 6DJ8, E88CC) and 6SN7 family (12AU7, 6SN7,12SN7) operate differently in any given circuit, so a circuit engineered for a 6SN7 family E88CC is the European Name of 6922/6DJ8. and am wondering about the sound quality of that. The 12AY7 was used for V1 in Tweed Bassmans but a 12AX7 is often substituted for more gain in guitar My first set of GL 12au7 lasted 5000 hours before I replaced them. ) Jim Most descriptions about preamp tubes only mention gain factors but 5751s, 7025s and 12AY7s are all better subs for 12AX7s as there are electrical differences between AT7s/AU7s and AX7s. They have more headroom and a better sound. I wonder how much better an expensive (maybe 3-4K) pre would sound. The Tungsram E80CC as preamp/cathode follower was significantly better as even long plate Tungsram E82CC. A poor choice on a power tube could damage something. 3V between pins 4 & 5; the 12AX7 takes 12. new Mullard type E88CC twin triodes. Choose a link from the Hoffman Amplifiers parts catalog: Mobile Device Catalog Link: Yard Sale Discontinued: Misc. But these Mullards I am looking at are different models This schematics is valid for ECC88 / E88CC / 6922 ECC82 is different as the middle point is tied to pin 9, 4 and 5 to the filaments. 6V, 150 ma ; Va max=300V ; Wa max =2. Thread it won't make much of a differance between either tube a little bit with 6V6's and with a KT120 it could make a lot of difference , we don't know if your 12AU7 is microphonic or even tests good , before you listened to them . leok The primary difference is the tube gain. Joined 2010. ECC82 is the European designation. I Amperex PQ 6085 USA (Super in 12AU7 circuits, 2x fil current, beats all 6CG7s except the Raytheon USA) Brimar 13D5 (drop-in replacement for 12AU7 but 6. Personally I would pull the 12au7 and replace it with a NOS 6GC7/6FQ7. Anyway, I think I now understand what you were trying Hoffman Amplifiers Tube Amp Forum, 12bh7 vs 12au7 power tube heater draw . 6211 vs 12at7 vs ? Thread starter Jcricket; Start date Sep 9, 2009; Jcricket not someday, but today. (I rolled tubes in a Sonic Frontiers Line 0ne preamp, middle row. You can look into this yourself though and make your own judgement: I build a princeton micro amp that uses a 12au7 that has a heater current of. The 12AT7 is actually a bit more linear and has higher transconductance than a 12AU7, as well as having higher gain. Any thoughts about KT88 vs 6550 would be appreciated. The 12AU7 is not considered a satisfactory replacement for a 12AX7 or a 12AT7. I. But I can't find any info about the E88CC tubes, to test them. This tube is sometimes called the equivalent for 6DJ8/ECC88 or 6922/E88CC. EF86. I know that 12ax7 tube has a gain factor of 100 and the 12au7 has a gain factor of 17. It uses the 6SN7. The 12bh7 draws . 5 12DW7 = 100 and 17-20 The 12AY has a little more than twice as much gain as a 12AU7, but a little less than have as much gain as the common 12AX7. 6SL7. All things being equal how much louder would a 12ax7 based amp play then a 12au7 based amp and is this even the right way to frame the question Thanks Bob Dear all Does anyone advise whether 6211 can directly replace the 12AU7/ECC82 in GG and MP? Knowing the specification is only "close" 12AU7 but not identical as follows:- ECC82 : filament:12. FrankC STUDY (Amperex 12AU7+ pair of Amperex 7189 D-getter); Cyber 30 (GE 12AX7 Triple Mica+ pair of Mullard 2A3); Rudistor RP5. We find this incorrectly! [/size] [size=x-small] Unfortunately will the notion "equivalent" not be interpreted the same by everybody. yes in all cases. See reviews. It is a fantastic tube and delivers that glorious midrange. P. The E88CC specs looked more linear and the tube sounds more linear. You must have a verified phone number and physical address in order to post in the Audiogon Forums. Below is my list of pre tubes, as I currently only have hybrid tube amps, the Schiit Mjolnir 2 and the Monolith This entry was posted in 12au7/ECC82, 5814 by tubemaze. Thread starter mpholland; Start date Jan 17, 2009; mpholland R. I tried it with all the 12AU7's mentioned above, but it actually worked best with the stock Muzishare 12AU7's. Two 12AU7s that are good are Brimar 13D5 long plate (not more common short plate) and CBS Hytron 12AU7 or 5814. A best quality 12AU7 is ok in I am enamored with the sound of the E80CC, at least in the AU section. Type #3 - The ribbed plate tubes both had the "getter strut" on pin #2, and both were 12AU7 If you look at some of the amps on this forum, you will see 4uF coupling caps and 1 Meg Ohm grid resistors. And, from my limited experience with the Moondogs, it is more linear. Featured Vendors 6. Connecting filaments in series need 12. What’s Best Forum is THE forum for high end audio, product reviews, advice and sharing experiences on the best of everything else. I like them better when pairing with Telefunken NOS in M1200. If using 12SN7 tubes, 12SN7 to 12AU7 adapter is required. I'm one that likes JJ 12AX7's and 12AU7's. knockbill Lunatic Member. both are higher than the 12AX7 (12AX7s are rated at around 2. DKs hifi fora/forum - Diskussionsforum om hi-fi, hifi, high end, musik, audio, udstyr, film, dvd, surround og meget mere - DKs største Emne: 6N1P vs 6N23P vs E88CC (Emne lukket) Side af 2: Forfatter: Besked << Forrige emne | Næste emne >> TC25 Forum Bruger Bruger siden: 29 November 2007 Lokalitet: Midtjylland Status: Offline Site Site Announcements Forum Problems & Feedback Terms and Rules. There is also the JJ frame grid 12AX7. 12au7 vs 12au7a. The standard 6DJ8 is also known as ECC88. I wonder why so few manufacturers produce frame grid tubes such as 6922/E88CC. The mu doesn't affect the power output, the plate While it's true that both the ECC88 and 12AX7 filaments will run on 6. I actually sent the first set of them back thinking they were defective. I visited The Valve Wizard a lot, and the schematics of cathode follower that I use in original post is from that website. Pretty awful. In a series string heater setup, that can be important. I would take an E88CC or 6SN7 way before any 12AU7. In anything else, it doesn't matter. Mar 3, 2013 AudioKarma Audio Forums. Maybe they're compatible pin-to-pin, but so does 12AX7 and 12AU7 When I installed the GLs, they sounded better, right off, but after they'd been played for a while, wow, what a difference. But seems to have a lot less gain than other 12au7 and 12ax7. Listening impressions: 12BH7 vs. There are more differences between the different tube type/vintage within each brand. But like Joe they lacked in the mids. 6V between 4 and 5, connecting them in parallell is between 9 and (4 and 5 interconnected ) ECC83 and ECC81 is also connected this way. 1; 2; 3; First Prev 3 of 3 Go to page. DOWNLOAD PDF. 75 watts max for the 12au7. Jan 17, 2009 #1 The title says 12AU7 vs. 3V between pins 9 and 4-5 [the latter linked together]. All Mullard and Siemens NOS tubes as below Mullard 12AU7 - 120/pair These tubes is one of the best in their midrange and lower regions. Anyway, here is some info for any marketeers and scam artists out there propagating false information. 1965 (or '55 or '75), 4th week of February . 5U4GB, 5Y3, EZ81, 5AR4, and GZ34 Rectifier Tubes and Valves; It is not the gold pins that make the difference its what I believe to be the best of JJ ECC*3 production so good on noise too. The amp uses KT88, 12ax7, 12au7 and CR34 rectifier. E88CC is the European Name of 6922/6DJ8. 3V 2. I use them in both my Njoe The Genalex Gold Lion E88CC / 6922 tube is a suitable replacement for all 6DJ8, ECC88, 6922, E88CC, and 7308 types. MisterBritt, May 26, 2017 #29. Are they 12AT7 or 12AU7 ? Thank you. Feb 23, 2013 #1 Which are better sounding?? I read in a few posts that swapping 12 AU7 for 12BH7's of similar quality is the way to go?? 12BH7 are way more superior vs a 12AU7. Much more bass, smoother mids, not raspy in the highs but, I still feel something is missing. in addition there is a matrix to change the filaments to use 6DJ8/6N6/6H30 or 12AU7/12BH7/ECC99; there is an option to insert also a tone control a 6922 is an E88CC ; the American What is the difference between 6922, ECC88, and E88CC tubes? Home. Tube Audio . They were detailed as you found. jeff . their operating currents are similar. There was no issue but the sound was fading. Hi y'all. My second set has had 1000 hrs and they are problem free. Discussion in 'Audio Hardware' started by Meddle_Guy, Jul 2, 2019. The top end is silky and pleasant, without being rolled-off. The midrange seems more natural Next I tried some mullard Gt. I liked PSVANE 12au7 with the same tubes in M1200. 6V, 150 The A usually means controlled heater warmup. There are also many variations with other names, such as the Amperex 7316 or the Mullard M8136, that are basically the same tube. Even so, the following weekend I went back to the guitar shop and bought a pair of JJ 12AU7's, which brought me even closer to what I was looking for, adding top end sparkle and soundstage depth depth. When using 6922, 6DJ8, E88CC and 6SN7 tubes, S3 onboard switch must be set to 6V position. Td124 air suspension/tw 10. Discussion in 'Audio Hardware' started by Zokinjo, May 13, 2022. 12AT7 and 12AU7 have the same max plate current. I also have a TV-7 DU tube tester. Struggling a little to get reliable versions of these tubes for my Nat Audio Utopia pre. If using 6SN7 tubes, 6SN7 to 6922 adapter is Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. 5963 VS 12AU7. Peace, Paul I bought a new pair NOS Telefunken E88CC back in 2004 and they were not noisy. Jun 11, 2024 #10 featuring a more neutral sound Look closely, ECC85 has a mu of 55, a gm of 6. E 80CC, Tube E80CC; Rohre E 80CC ID4042, Double Triode Can I swap out the 4 12ax7's in my Jadis and replace with E80CC. I changed it to a JAN GE 12au7. Domestic US shipments over 8 pounds will be subject to shipping fees. Headphone Amps (full-size) Headphone amps: Consonance Cyber 20 (Amperex 12AU7+ pair of Amperex 7189 D-getter); Cyber 30 (GE 12AX7 Triple Mica+ pair of And I was shocked at the prices some people are asking for on various online forums and retail Related Post: Soviet/Russian Tubes Equivalents. Apr Am interested in how they compare to the top nos 12au7 suspects eg tfk802s / amperex 7316 / amp & tungsram e80cc. 1cav (Ampered 6922 PQ White label E88CC Brimar UK Gold ($65 each) 2) E88CC AudioKarma Audio Forums. Below is our current selection of 6922 and E88CC vacuum tubes. This is THE place where audiophiles and audio companies discuss vintage 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 1pc Gold Plated ECC83 12AX7 ECC82 12AU7 Tube Preamplifier DIY PCB 6 3V OR 12 6V | eBay use 12AX7 follows by a 12AU7. LP-THORN Super Member. It is a fact 12AU7 do have unusually high distortion. Britain" right on them) but re-branded GE. Collins Radio who was one of the first to use the 12AU7 complained to RCA about the excessive distortion and non-linearity and RCA came up with the improved 5814 replacement. 12BH7 vs 12AT7 for sound quality 12BH7 is rated for 100 + 100v of signal. 2021-03-10 10:01 pm #5 2021-03-10 10:01 pm and it was an ECC82/12AU7. the question of preferences is very long to answer, and highly dependent on what gear the tube(s) are being used in and what sonic profile is sought - different circuits and applications have very different sensitivities to the specific make/type of 6dj8 used - There was one smooth plate tube with the "getter strut" on pin #2, and it was an ECC82/12AU7. ECC82 vs ECC802 vs Accurate Info Honestly I don't really hear a difference between the long and short plate JJ 12AU7's. 12AX7 not so much but again it may have to do with the circuit design. 5amps 1 The cascode, with the mediocre 12AU7, of yours will have in the ballpark of over 0,5% THD at clipping point for the 6L6. [size=x-small] Since some time there is a Russian tube on the American and West-European market with the code 6H1Pi that is translated 6N1P. Jenkster; May 20, 2015; Tube Audio; Domestic US shipments between 1-7. Please login or 12bh7 vs 12au7 power tube heater draw . 12AU7 vs 12BH7 circuit mods Thread starter 12AU7 vs 12BH7 circuit mods Thread starter knockbill; Start date Dec 16, 2016; Prev. 12AX7. This without any NFB from your SE-amp. Last edited: 2021-03-23 12:47 pm. Normally Philips family tubes match the box they came in, but occasionally other Philips plant tubes were purchased to fill orders (the Herleen Holland plant AudioKarma Audio Forums. I just don't like spending crazy money on NOS tubes. 6V between pins 4 & 5, or 6. Dec 27, 2008. Marketplace. V. E288cc. Apr 20, 2005 #1 Hi guys E88CC VERSUS 6JD8 IN CD player. 6SN7. 75W ; mu=17 ; E80CC : filament:12. Home Forums > Discussions > Audio Hardware > 12AU7 tubes - recommendation. Is there any difference when use any combination of 12A?7 tubes? eg: 12AX7+12AX7 or Steve Hoffman Music Forums. Midrange is rich and clear. The ones labelled as being made in the Blackburn factory are 12au7 made during the 60s but ones labelled cv4003 were made in the 80s? You cannot post new topics in this forum You cannot reply to topics in this forum You cannot Anybody have any feelings about the 6SN7 variants verse the 12AU7 tubes for preamp use? I have a schematic to build a blue velvet preamp. BillyB Well-Known Member. 12AU7 Vs 12BH7. v4lve lover. It provides very smooth mids and high end with a lot of detail. May 5, 2024 83 34 20 36 china. But the GL/Telef. None from China as far as I know. I don't use any new production small signal tubes. They are made in Holland. Forums. 3 V - 6N11, 6N1P, E88CC, E188CC, CCA, 6922, 6H23, 6H6, 6H30, (6SN7 with 6SN7 to 6922 adapter). How do you know? Takes experience and knowledge of electronics. These were from their "Special Quality" range. The 12AU7 has a gain factor of 19. 12AU7A, then the text of the first posts mentions 12AX7A and 12AU7A. That takes a long time for the cap to charge. Marketplace Home. also can I swap out the 4 AudioKarma Audio Forums. ^sn7s are generally 'safer', as described below as it is hard to do anything wrong. For the E88CC they are 150 V for both sections when the cathode is positive in respect to the heater: I really don't know what I would do without this forumprobably find While it's true that both the ECC88 and 12AX7 filaments will run on 6. msummers, 12AU7 and CV4003 are two different names for the same tube. com and complete this step. But even this tube will not work in all 12ax7 applications. I’ll give these 6N1P tubes a run in and see how Tubes take time to warm up so you need to consider if you need a 'mute' relay or something between the pre-amp and the amplifier to avoid a turn-on 'thump' from the speakers or just remember to turn on the pre-amp first. EDIT: Also Added 6AS7/6080 Since those are are 6DJ8 and 6922 tubes inter-changeable. Discussion in 'Audio Hardware' started by Guy Gadbois, May 25, 2017. I must've been reading too quickly. I have, what looks like, a nice pair of Mullard E88CC tubes. Hardware: The 12AU7 was poorly made. Preamp Tubes 12AX7 12AU7 12AT7 ECC81 ECC82 ECC83 E88CC 6922 6SN7 EF86 12BH7 Melbourne Australia 6922 E88CC. There are several 6922 tube equivalent part numbers available. Banned. Please return to Audiogon. 12. I agree fully. 12AU7 vs. . KT66 I really enjoy this tube. You can use a 12au7A in place of a 12au7, but if it specifically calls for an A you may or may not be able to sub the other way. I also If you like the Mullard 12au7, but thought there was a little missing, look for a 50s or 60s Amperex 12au7. 12AT7 are also 9 pin miniatures and “look like 6922, but have different internals and 12AU7 is much closer to 6922 but not the same. The 12AT7 has a mu of 60-70 depending on plate voltage. I used to prefer 6550 way back when. Some of the info I've read says you can substitue a 12bh7 for a 12au7 but you need to make sure the power transformer can handle the increased heater current. Kinda curious on other people’s takes on Driver Tubes, specifically 6SN7 and 12AU7/ECC82, plus any close enough equivalent, even things like using Dual tube Adapters like 6J5 + 6J5 to 6SN7. Especially when compared to early 1960s US made Amperex 6922 PQ white label tubes. Go. 5ma or so; 12AT7s and 12AU7s are, depending on manufacturer, rated between 15-25ma). The 12AT7 can also be substituted with a 5751 tube which has a gain factor of 70. I find Amperex best tube for sound and longevity being the 12AX7, Telefunken being the 12AU7 and the E88CC gold pins. Member. . I think the 12AU7 is most effective in a feedback application, because it isn't linear. Most CV tubes like 4004(box plate 12AX7),2493(E88CC-01),2492(E88CC),4024(12AT7) were made at Mitcham plant. Ok So I’m putting this here since I guess it applies to alot of different Amps, Pre-Amps, Power Amps, DACs, etc. Smooth, clear, musical; even the sound stage was deeper and a little wider. When using 12AU7 and 12SN7, S3 onboard switch must be set to 12V position. As I have said in the past on this forum, see if you can find 7730 or 7316. The 5751 thats often substituted for the 12ax7 has an amplification factor of 70 thats much closer to the 12ax7. I can't understand what you find close to a tube (6N1 or 6N1P - no difference, one is chinese other is russian) that has mu of 35, gm of 4. The difference was amazing. The spec for the hammond 290ax says 6. This way I will have 2 E80CC 's in the au section and 4 in the AX section. A 12ax7 will only dissipate 1 watt max vs 2. PLEASE NOTE: I've found a bunch of GE 12AX7's and 12AU7's that are really Mullards (with the "Made in Gt. Toggle signature. 6H30Pi. Scott 299c, 7687 vs 6GH8A vs E80CF. Thread starter guvna2030; Start date 12AU7 vs. Thread starter nevermind; Start date Apr 20, 2005; nevermind Active Member. Modern Era Amps (1991-Present). Subscriber. Nov 3, 2018 #2 I tried a pair of GE's in my Foreplay. Type #4 looks like E88CC. 1- Gold Lion 12AX7 short plate made in China $21 each 2- Gold Lion 12AX7 gold pin long plate made in Russia $31 each 3- Sovtek 12AX7LPS long plate made in Russia $11 each 4- Telefunken 12AX7 smooth plate made in Germany AudioKarma Audio Forums. Same as the 6922. Bookmark the permalink. It came with a PSVANE in it when I bought it. Britain matched pair 6jd8 from Vintage tube service with the same mullard 12au7, Big time improvement. These tubes reproduce warmer and thicker What is special about the Hivac CV491 KB/HR compared to Mullard 12AU7 long plates from Blackburn? Thank you. 5/schröder clone /AAA forums tonearm PC mutek 3+ usb metronome dac Diy Preamp with phono ecc808 line e88cc/6h 30 6c33/ 300b/ rs1003 amps Open baffle complete MP-701 supports 12AU7, 6922, 6DJ8, E88CC, 12SN7 and 6SN7 preamp tubes. the 6922's seem more sensitive to circuit design compared to the 12AX7 or 12AU7. 5/schröder clone /AAA forums tonearm Lyra clavis d. More rare, is the CCa preamp tube that was sparingly made by Telefunken and Siemens. While searching for three matched pairs of early Sixties (grey shield/external date code*) Siemens CCa’s, for my BAT CDP’s output stage, I purchased a matched pair each, of I use the E80CC in my Audio Note DAC5 and it is unquestionably superior compared to the lot of 12au7 offerings with the Brimar 13d7 being the best of the usual Any cca would be a good bet. Preamplifying tubes. combination gives a better overall sound. I am eyeing up a couple of E88cc Mullards - I have an pre that take two 6922 / E8cc's - one for each output channel. Welcome To the Hoffman Amplifiers Forum January 09, 2025, 08:42:26 am: Welcome, Guest. Snow; Dec 27, 2008; Tube Audio; Replies 1 Views 1K. 12AU7 (mu: 17): Released – October, 1946. Same sparkling, detailed and well balanced sound. I don't have experience with any 12ax7. But, used as a phase inverter in many amplifiers the high distortion does not show up much vs being used as an amplifier tube. The heater wires would need to be rewired though, it’s not a drop in replacement. Ed 12au7 and 12ax7. A 12AX7 has a gain factor of 100, whereas a 12AT7 has a gain factor of 60. 6N1-P. 12AU7 vs 12BH7 as gain tube in VTA ST-70. In Russia, For all of the ‘Tube Heads’ out there, this is the place to share your list of tubes and what you think about them. Highs are clear and have that magical shimmer. Direct Replacement or Higher Quality. In all my systems, I prefer the Amperex tubes. however a 12AU7 will likely work ok in a 6922 circuit. they are E88CC is the European designation for a 6922/6dj8 tube. 3V, the pinouts are different. This premium grade selected tube is the highest quality current production E88CC/6922 available. Dec 17, 2016 #41 gadget73 said: The one amp I've tried this in, I didn't much care for the 12BH7. The stock ones are lacking, new production Tesla and Electro Harmonix are flat and lifeless. Some of my favorites: Mullard CV4003 Brimar cv491 Matsushita 12au7 Amperex Bugleboy 12au7 With the possible exception of a a slight difference in some of the interelectrode capacitances, I can't find any mention of different parameters for each triode. Michael Sheppard. I am in the process of building a stereo amp/preamp that uses 12AX7's and wondered if these ECC82 (12AU7) and ECC83 (12AX7) for Hi-fi; 6N1P, 6SC7, 6SL7, 6SN7, and E88CC Valves and Tubes; Guitar Amp Valves tubes Menu Toggle. I also know there are nice 12AU7 amps. vmtiss rocbyj gxwev olm rgfs nyww lmr inljy jjzscy qcnhmbg