6sl7 Vs 12ax7

For example, don't expect a 12AX7 based Cathode Follower to drive a 600 ohm load to 10 volt peaks just because it has a 600 ohm output impedance. 13 (46%) Tung Sol 6V6GT Platinum Matched Duet Tubes. compared to 12AX7's and ECC81's. Tung-Sol SINGLE Factory Tested 6SN7 6SN7GTB Tube $ 23. With the 12AX7 being such a popular tube in. The key point I hope that I have made is that the SRPP holds two sub-circuits and that one of the two, the impedance-multiplier circuit, is quite interesting, if for no other reason that so few knew it was there in the first place. 12ax7 Direct Coupled Cathode Follower. Now we have: µ = 100 R A = 80K ohm. While many lovers of vacuum tubes enjoy the hunt for NOS (new old stock) tubes, great deals on NOS tubes are few and far inbetween. Can I solicit some opinions from anyone who has tried any octal preamp tubes? The 6SL7 is listed in the RCA tube manual as high Mu, so that's what I was going on. The 6SJ7 tested was very close to specifications, despite its age. Title: Unknown Author: Unknown Created Date: 11/16/1997 2:31:22 AM. These were replacing the stock Primaluna silver 12au7's. and several designs were presented using various dual triode tubes. ONE Mullard ECC82 / 12AU7, K61, B8J, Goal Post, 1958, TV-7 Tested: 81% 66%. Thanks for your replies gentlemen. Harmonically rich, with a detailed low end and a warm high end. 6922 Gold Pin (also E88CC) Premium gold pin version of 6922. ****OUT OF PRODUCTION***NLA****. The ECC83 MG is a "Mid Gain" 12AX7 type tube. p = Pentode Unit. The 5751 is the nine pin equivalent of the 6SL7. Let's examine how the distortion of a 12AX7 changes with the value of its plate voltage. it won't hurt your preamp. The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for. Tube Testing Equipment. The Holland made versions are similar in size to the "tall boy" USA types. Radio tubes are valves. Linearity is good but as with other high mu vacuum tubes, large voltage swings aren't possible. While many lovers of vacuum tubes enjoy the hunt for NOS (new old stock) tubes, great deals on NOS tubes are few and far inbetween. Read More $24. While many lovers of vacuum tubes enjoy the hunt for NOS (new old stock) tubes, great deals on NOS tubes are few and far inbetween. Again a surprise since apparently it is a tube very well suited for audio use. interesting!. Its large octal format is more rugged and less prone to intermittent pin connections than miniature type. This tube was first produced by RCA which called the 5691 one of it's "SPECIAL RED" tubes due to the red colored low. B: ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021. Gear Talk - Power Tube Comparison El34 vs El84 vs 6V6 vs 6L6 vs 6550 vs KT88 (Reussenzehn) Lothar's Guitar School - Gear Talk - Reussenzehn El34 In this episode I show you my Reussenzehn El34. The Tung Sol 12AX7 is warm and big musically. I select a 12AX7 the databook said that µ = 100 and Ra= 80K ohm I made R = RAK = RK = 3. 12AU7 is double triode small size novel tube, it is used as inverter drive push-pull amplifier in amplifying circuit. Northern Electric 6SL7. ECC35 has 0,4 Amps filament current, whereas 6SL7 has 0. GE used/tested ANOS 12AX7 & 12AX7A ( 1960s Gray Plates ) $ 20. 6SN7 is a dual triode vacuum tube with an 8-pin octal base. It is frequently confused with other, vaguely similar-looking circuits,. The Holland made versions are similar in size to the "tall boy" USA types. The 6DJ8 has to cathodes, two grids, two plates, one heater and one internal shield, for a total of eight elements. Philips are what are mostly seen, if rarely. 2013 22:15:07. The 12AU7 can run on either 12. This should be the last installment on the SRPP and SRPP+ circuits—for a few months at least. ECC35 has another operating point, but it will fit in normal 6SL7 circuits, since this is a high gain tube and auto bias is functioning very nice with high gain tubes. I think that they sound better. Can be also used as replacement for 12AX7 in many applications. Get a low price and free shipping on thousands of items. And since the 6SL7 is also a 6 volt tube, it works flawlessly. Richie Mike: The RFT 12AX7 removes the harshness that I was experiencing from the amp (Dr Z Maz Jr). The octal preamp tubes I am familar with were used in tweed Fenders and many other vintage tube amps. 174) I have the Sophia 6sn7's and no longer use them in my amp. The 12AU7 can run on either 12. The Long-Tail Pair. This tube is sometimes called the equivalent for 6DJ8/ECC88 or 6922/E88CC. For those 6sl7/6sn7 users,don't be afraid to swap 6sl7/ 6sn7 or vise versa,or even 6sl7 on one channel and 12ax7/ 6dj8 12au7 on the other channel. I have also used hi-mu triodes, but 6N2P-EV tubes with practically similar topology and the results are good. Source Legend: DC Dave Cigna / Francesco Piazza DM Me!. Watford valves through its unique valve test equipment offer the most comprehensive and thorough valve test facilities on. ECC83S is 12AX7 high gain pre-amplifying double triode. As a popular choice for guitar tube amplifiers, its ongoing use in such equipment makes it one of the few small-signal vacuum tubes in continuous production since it was introduced. care to elaborate about that adapter??…6SL7 is indeed dual triode and octal. 2 excellent strong 1969 mullard 12au7a / 12au7 tubes # 727. It is frequently confused with other, vaguely similar-looking circuits,. The 6SL7 is identical to the miniature 5751. Diode Rectification. Tung-Sol 6SL7GT. If you're looking for great-sounding vacuum tubes, fast shipping and superior customer service, then you have come to the right place. Third tube is a 12AX7. Robin, thank you for the specs. These old octals are streets ahead of noval valves , I just don't understand all the fuss surrounding these 'exotic' ECC83 variants. A little better gain and on average a little better performing tube. Read More $24. Model shown : Low Gain Edition (2V Input Sensitivity) with full suit of Hashimoto (Sansui) Transformers, with max of 4. Tube 6SL7 or Röhre 6SL7 ID2112, Double Triode, Octal (Int. 3 K ohm and find the RL is 123 K ohm by F 45, 120 K is practical. I have also messed around with similar high mu valves , in my case I compared 7F7 (loctal 6SL7) to 6GK5 , ECC83 and 5755. The -3 dB HF roll-off is higher for the 12AX7 due to its lower input capacitance. Interested in this item? Contact right sound now! Forum Messages. 75 Electro-Harmonix QUINTET (FIVE) 12AX7 ECC83 GOLD PIN Preamp Tubes $ 71. And 6 volts is correct. A 12AU7 would have worked better in the long tail phase inverter position, but then the amp would not have enough sensitivity for the matching Troughline preamp which essentially has no line stage and just a 2 stage EF86 phono preamp. The 5751 is the nine pin equivalent of the 6SL7. It has the same pinout as the 12AX7 but is not electrically compatible and is taller. GE used/tested ANOS Long Plate 12AX7 (these sound great in Fender amps) $20. The Optimised SRPP Amp (Part 1) By Merlin Blencowe Some deceptively-simple circuits, explained for the audio amateur. To make things easier to find, I've listed all the equivalents from the header, so some files will be duplicated. Tung-Sol 6SL7GT. It has high gain, high ra and very low input capacitance just like a pentode, but without the inherent. The type 5691 Tube is a "premium" version of the type 6SL7. Today, a look at almost any guitar tube amp, be it Fender, Marshall, Vox, or any other, will prove the 12AX7 / ECC83 / 7025 tubes are here to stay. GE used/tested ANOS 12AX7 & 12AX7A ( 1960s Gray Plates ) $ 20. Thanks to its design it also peforms with very low noise and microphonics. The octal preamp tubes I am familar with were used in tweed Fenders and many other vintage tube amps. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. (I believe 6N2P requires 40ma or so of additional current over a 12ax7) Some have said 6N2P-EV to be more closely related to a 6SL7. Octal-type dual triodes are available that perform similarly to the 12AX7 and the 12AU7. Superior quality custom ATA road-cases are also available. The Tung Sol 12AX7 is warm and big musically. 12AX7: 12DW7: 5751: 7247: 6DJ8: 6267/EF86: 6922/7308: 6SN7/5692: 6SL7/5691: Store Hours Monday - Friday 9 am - 5 pm Central Time : SND Tube Sales. Tim's 12AU7 Tube Preamplifier Schematic. With the 12AX7 being such a popular tube in. NOS specs call the 5751 a "special 12AX7" having a high-mu amplification factor of 70. I think that they sound better. Tube Depot carries a selection of 6SL7 Pre Amp Vacuum Tubes. The Flagship All amps include a superior-quality custom sewed slip-cover. NEW SHUGUANG CHINESE 6N9P 6SL7 6H9C Vacuum Tube 2PCS - $19. These are rough estimates as each tube will have its own electrical characteristics and just swapping one (new) 12AX7 for another (new) 12AX7 could result in slight higher or lower gain from the circuit. The first EH 12AX7's were the exact same plate as the LPS which was 5/8" long. Vacuum Tube Warranty & Return Policy. We have the ECC81 ECC82 ECC83 was introduced specifically for audio applications way back in 1954 to replace the earlier 6SL7 octal based valves. The key point I hope that I have made is that the SRPP holds two sub-circuits and that one of the two, the impedance-multiplier circuit, is quite interesting, if for no other reason that so few knew it was there in the first place. Tubes: 5 (12AX7, 6SL7, 2x6V6, 5Y3 or Pre (1x7025, 1x6SL7), Pow (1x6L6 PAIR + 5Y3)) Extension Seaker Jack: No Monitor Jack: No Watts Output: 14 Shipping Totals: 1955: 110, 1956: 57, 1958: 8 Harmony Central Review GA15 Harmony Central Review GA15 110 Combo Schematic with 1x12AX7, 1x6SL7GT, 2x6V6GT, 1x5Y3GT This amp was introduced in 1955. Re: 6SL7 vs 12AX7 Whats the dif. With the 12AX7 being such a popular tube in vintage as well as current preamplifiers, a great 12AX7 is always in demand. A 6SL7 has the same gain factor as a 5751. I found some recently but they were metal (dont know if there is a difference in tone). Grading and Matching. So that may be a consideration unless you are building from scratch and take that into consideration. 12AX7 Basics The 12AX7 is a 9-pin miniature, high-mu, twin triode. Bottom is ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021 ( 12. There are many versions of the 12AX7 tube and many brands. Qty: * Click to read more: T-7581A-TUNG The best current production 6SL7 available. In most applications, but not all, RCA 12AX7 black plate are fantastic. Moved Permanently. So, if you have something to share, would appreciate very much. The 12AX7 is also used in many audio preamps and in guitar effects pedals. Richie Mike: The RFT 12AX7 removes the harshness that I was experiencing from the amp (Dr Z Maz Jr). Although they've been going up in the last couple of years. 75 Electro-Harmonix QUINTET (FIVE) 12AX7 ECC83 GOLD PIN Preamp Tubes $ 71. Very low microphonic. If you are looking for a high mu tube and want to use something else as the 6SL7 tube or if you look for an Octal based alternative to a 12AX7, the 6SC7 might be the choice for you. Otherwise a bad sample sounds just as clinical as a bad 12AX7. This the first Princeton to use the 12AX7 rather than the 6SL7 or 6SC7 of previous models. I think a 6SL7 be a good sub for the 12AX7 with the same 300 ma heater current. This includes such classics as 6L6, 6V6, 6550, 6CA7, 12AX7, 12AU7, 6SN7, 6SL7, 12BH7, 12AY7, etc. Natural Sound 6SL7-T. it won't hurt your preamp. The open sound with detailed, but not edgy midrange is to die for. There may be similar for the 12AU7 12AT7 and maybe the 6SN7. Circa 1958 K61 series long plate GB-made Mitcham Mullard 12AU7 TUBE. com will in no way be held responsible (financially or otherwise) for equipment that is damaged from the use of tubes or parts purchased from us. The 7F7 is identical to the 6SL7. The "7" in the leading digit. t = Triode Unit. A completely hand-wired, true tube preamplifier using full tube rectification, tube regulation and point to point wiring. bjlefebvre AK Subscriber Subscriber. 6SL7 5678 5672 6SN7 5692 5691 6SN7 ECC33 6SJ7 6AJ5 6AK5 6AS6 6AL5 6663 EB91 EAA91 2D21 EN91 955 6BA6 6660 EF93 PM04 6BE6 EK90 HM04 12AX7 6681 ECC83 12DT7 7025 12AU7 6189 6680 ECC82 25A6 25B6 25C6 25L6 6L6GC 7581 7581A 5932 EL37: 5910 5915 5930 5931 5932 5933. So, if you have something to share, would appreciate very much. 2013 22:15:07. They are electrically and sonically quite different. If you want to get an idea of the gain level of the 6SL7, try a 12AY7 or 12AT7 in there but again, I don't know if anything was done to your circuit to tame the 12AX7 (if anything) either way, it won't hurt the amp to try a lower gain, nine pin tube. The -3 dB HF roll-off is higher for the 12AX7 due to its lower input capacitance. The most popular of this family is the ECC83. 0 out of 5 stars 1 More Buying Choices $17. ONE Mullard ECC82 / 12AU7, K61, B8J, Goal Post, 1958, TV-7 Tested: 81% 66%. Also, people has used a 5751 in placed of a 1AX7 and this website (http://www. Diode Rectification. This is a long plate valve so has a very rich tone. It is the responsibility of the customer to consult with the equipment manufacturer with regards to proper tube and parts replacement and recommended / proper biasing procedures. I have tried using a 6sl7 pushing 1/2 of a 6Sl7 to a 1 meg volume and back to the second 1/2 6SL7 and I really like the initial tone. The TJ was a much different story, this tube showed an improvement across the board. However, a complicating factor in all this, too, is in a B-15, new 6SL7's sound not as ballsy and a little on the meh side compared to old ones, and I only use NOS in my B-15N for that reason, and I'm sure that's why the Heritage B-15 came with NOS 6SL7's. TWIN TRIODE, 12AX7 datasheet, 12AX7 circuit, 12AX7 data sheet : GEC, alldatasheet, datasheet, Datasheet search site for Electronic Components and Semiconductors. High gain, super low microphonics, and superb linearity with a three dimensional tone. Hi-end phono preamplifier (soon available in kit or assembled)Nov 27 st, 2008. It was released for public sale under the 12AX7 identifier on September 15, 1947. The 12AX7 will have a bit more gain (34 vs. 12V they don't sound as intended because you are out of the optimal operating. The Optimised SRPP Amp (Part 1) By Merlin Blencowe Some deceptively-simple circuits, explained for the audio amateur. Thanks for your replies gentlemen. Without going into some of the more obscure tube types, I played with the 12xxx series, 6SN7/6SL7 types, 5687 and the 6922/6DJ8. The "7" in the leading digit. When you look into the 6SL7, the high mu sister of the 6SL7, you will discover it has two sets of curves, low current for RIAA pre-amp use, high current for power tube use. Title: Unknown Author: Unknown Created Date: 11/16/1997 2:31:22 AM. 6AV6,6SQ7, and 12AX7 triodes. In most applications, but not all, RCA 12AX7 black plate are fantastic. This the first Princeton to use the 12AX7 rather than the 6SL7 or 6SC7 of previous models. The first section of the table lists 4 digit and European types sorted in numerical and alphabetical order with USA type designations in the second column. Ya, my B-15N has 6SL7's and I love it, yet my SVT and V4B have 12ax7's and I love them, too. Vacuum Tube Warranty & Return Policy. I have always wanted an amp that used 6SL7's in the gain stage. Known in Europe under its Mullard-Philips vacuum tube designation ECC82, in fact, the 12AT7, 12AU7 and 12AX7 or the ECC81, ECC82 and ECC83 are all exactly the same vacuum tube but with varying electrode spacing and grid pitch to achieve the different characteristics. Octal Tube Socket Numbers. I have been using a 50s Bogen head with 2 6v6, 1 6SL7, 1 6SC7, and one 6SJ7. I've decided to relaunch my most popular seller with many upgrades while still keeping the price under $1K. I actually read that review when it came out and have alway thought the SLP-94 a great preamp. ECC35 MULLARD NOS TUBE 6SL7 CV539 VT229. The 6SL7 is identical to the miniature 5751. Octal, IO) K8A, USA 1935 and Audio Frequency shown. hp = Heptode Unit. The open sound with detailed, but not edgy midrange is to die for. That is why the RCA 12AX7 black plate are expensive. 300 ma for the 12AU7. Shuguang 6N8P (6SN7) $18. And 6 volts is correct. Positive Feedback ISSUE 76 november/december 2014. You really can't use a 6SN7's in circuits designed for 12AX7's because the tubes do not have the same electrical characteristics. The 7C6 triode is also similar. This Chinese 6SL7 tube type is commonly called a 6N9P tube in China. The Little Dot heater supply voltage is 6 volts, so we wire the 9-pin socket (by using pin 9) to run the 12AX7 on 6 volts. It's lower gain octal brother is the 6SN7 with amplification factor of about 20. similar to 5751 gain. I have also messed around with similar high mu valves , in my case I compared 7F7 (loctal 6SL7) to 6GK5 , ECC83 and 5755. A 6SN7 won't die with 600V on it and a 12AX7 will be a little plasma ball. Best regards Thomas. I recently got a box of NOS tubes, among them several Mullard and Telefunken ECC83. An all-tube Carvin V3, equipped with five 12AX7 preamp and four EL34 power tubes. Title: 6SL7GT 12SL7GT Author: General Electric Subject: JA-FP-2000-12-26 Created Date: 12/26/2000 8:39:03 PM. Watford valves through its unique valve test equipment offer the most comprehensive and thorough valve test facilities on. 12AT7 - ECC81 Another popular twin triode. Flying Leads Plug&Play CV4035 - Premium 12AX7 ECC83 ECC803S E83CC 7025 CV4004 CV492 M8137 M8214 6057 type. Preamp Tubes - 12AX7 / ECC83 / CV4004 / 5751 Tube Basics and FAQ. It provided a medium gain (20). If you want to get an idea of the gain level of the 6SL7, try a 12AY7 or 12AT7 in there but again, I don't know if anything was done to your circuit to tame the 12AX7 (if anything) either way, it won't hurt the amp to try a lower gain, nine pin tube. While many lovers of vacuum tubes enjoy the hunt for NOS (new old stock) tubes, great deals on NOS tubes are few and far inbetween. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. Otherwise a bad sample sounds just as clinical as a bad 12AX7. d = Diode Unit. This 13-page brochure goes into (necessarily) exhaustive detail on prewar product. It's hard to compare directly, since those two tubes are not direct swappable. A 6SL7 has the same gain factor as a 5751. It was released for public sale under the 12AX7 identifier on September 15, 1947. They was thought as 9 pin replacements for octal 6H8C (6SN7 GT) and 6H9C (6SL7 GT) respectively. Original 400mA filament current tube. Moved Permanently. As well it offered more gain. Fortunately, the 12AX7 can be used with either 12 volt or 6 volt heaters. Some tweaks could be made to compensate for that if the 6SL7 loses too much HF. Just as I had hoped. 12at7,12bz7 & 6dj8/ecc88 etc. I think a 6SL7 be a good sub for the 12AX7 with the same 300 ma heater current. I have also messed around with similar high mu valves , in my case I compared 7F7 (loctal 6SL7) to 6GK5 , ECC83 and 5755. The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. 6SN7/6SL7 tubes are not in anyway compatible with 6AS7/6080/6H13C tubes. p = Pentode Unit. it won't hurt your preamp. Heard a few folks mention that they find 6922s too "clinical. Best Bass Gear is a dedicated bass guitar only website for the bass enthusiast. NEW Shuguang Chinese 6N9P 6SL7 6H9C Vacuum Tube 2PCS - Direct Replacement of 6SL7 FREE SHIPPING WORLDWIDE DESCRIPTIONThe Shuguang Chinese 6N9P is direct replacement of 6SL7. This tube was first produced by RCA which called the 5691 one of it's "SPECIAL RED" tubes due to the red colored low. 12at7,12bz7 & 6dj8/ecc88 etc. " As the signal passes through, preamp tubes influence the various EQ stages found in your amp, such as distortion, gain boost, tremolo and reverb. We will take a look at why you might, or might not want to swap out the different types of tubes. Octal Tube Socket Numbers. Watford valves through its unique valve test equipment offer the most comprehensive and thorough valve test facilities on. 6SL7 Tubes Below is our current selection of 6SL7 audio tubes. These are generally much smaller than power amp tubes and serve the main function of shaping the overall character and tonal characteristics of your guitar sound. The octal preamp tubes I am familar with were used in tweed Fenders and many other vintage tube amps. All 12AT7 / ECC81 / 6201 / CV4024 12AU7 / ECC82 / CV4003 / 5814 12AX7 / ECC83 / CV4004 / 5751 6922 / 6DJ8 / 7308 / PCC88 6SL7 / 5691 / CV1985 / 6N9 6SN7 / 5692 / CV1988 / 6N8 Hide. Feedback received via email: “Hi Rachel, I received the 12AX7LS super tubes and their performance is super! Put the new tubes in and turn on, first 10 mins, comparing to Psvane 12AX7-TII…the new super tube has lower noise floor, sound is more dense and transparent, bass is deeper and better bass layering. ECC81 is 12AT7 medium gain pre-amplifying double triode. Some say the VT-229 are slightly more focused then the 6SL7 but at over three times the price I hope thats true and not myth. For example, don't expect a 12AX7 based Cathode Follower to drive a 600 ohm load to 10 volt peaks just because it has a 600 ohm output impedance. Grid Resistors - Why Are They Used? General. The 12AU7 vacuum tube was first marketed back in October 18, 1946. The 6SJ7 tested was very close to specifications, despite its age. 3 K ohm and find the RL is 123 K ohm by F 45, 120 K is practical. Tube Interchangability Reference. Can you substitute a 12bh7 vacuum tube for a 12ax7 or 12au7 or 12at7 or 12ay7? Examples: 3A5, 6J6, 6SN7/6SL7, 12AU7/12AX7, ECC32, ECC82. The 6EU7 is a low-hum, nine-pin, high-μ (100) dual triode with a different pinout than that of the 12AX7. For 9-Pin power tubes like the EL84 the plate is pin 7 and the cathode is pin 3. hp = Heptode Unit. Works well with solid state and tube amplifiers alike. I use the the 6SL7's in a piece of gear and the Sylvania's are my favorite, very similar to the 6SN7. Can someone speak to similarities and differences between 6N2P-EV and 12ax7, given that: Both are wired for their correct pin out @6. The 6SL7 is an octal twin triode with amplification factor (mu) of about 70. Going on to Loktal tubes we find the 7B4,and 7B6 triodes identical with the 6AV6. Customers who bought this item also bought. As well it offered more gain. care to elaborate about that adapter??…6SL7 is indeed dual triode and octal. 32 dB at midrange), and the LF roll-off is nearly identical. 6N1P and 6N2P are the most popular small signal twin triodes in Russian audio. Preamp Tubes 12AX7 12AU7 12AT7 ECC81 ECC82 ECC83 E88CC 6922 6SN7 EF86 12BH7 Melbourne Australia 6SL7. Some say the VT-229 are slightly more focused then the 6SL7 but at over three times the price I hope thats true and not myth. Original 400mA filament current tube. NEW Shuguang Chinese 6N9P 6SL7 6H9C Vacuum Tube 2PCS - Direct Replacement of 6SL7 FREE SHIPPING WORLDWIDE DESCRIPTIONThe Shuguang Chinese 6N9P is direct replacement of 6SL7. " As the signal passes through, preamp tubes influence the various EQ stages found in your amp, such as distortion, gain boost, tremolo and reverb. 6AV6,6SQ7, and 12AX7 triodes. It is the responsibility of the customer to consult with the equipment manufacturer with regards to proper tube and parts replacement and recommended / proper biasing procedures. High frequency twin triode preamplifier tube used in studio and hi-fi equipment. This is a long one folks. Low output. 2013 22:15:07. They was thought as 9 pin replacements for octal 6H8C (6SN7 GT) and 6H9C (6SL7 GT) respectively. The 12AX7 is by far the best known preamp tube among guitar players. Ham Call: WB0SND. More information Saved by Randal Vaughan. In many cases, these tubes are interchangeable and can easily be swapped. Due to its rugged construction and conservative ratings, it is the most reliable current production EL84 type available for use in Vox AC-30 type amplifiers. 6SN7GT US BRANDS TECHNICAL INFORMATION (6SN7GT and VT-231 have a 300VDC Max Plate Voltage rating, most are 1940's) (6SN7GTA is improved, uprated to 7. For guitar amps it can be imagined to be a simulation of a pentode, and indeed the circuit does resemble one. The 12AX7 will have a bit more gain (34 vs. Once thing interesting about Loktal's. The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. The idea behind 6EU7 is that by rearranging the pins, there'd be less filament hum pickup. The preamp is an octal 6SL7 (ancestor of the 12AX7). Download, Listen and View free SRPP vs cathode follower, right pre out tubes for you 12AU7 6SN7, no good 12AX7 6SL7 12AT7 진공관앰프 MP3, Video and Lyrics. Heard a few folks mention that they find 6922s too "clinical. I also concur with 6SL7 choice - have used both 6SL7 and 12AX7. They sound great and were the seated "incumbents" in my reference system. Tube Interchangability Reference. New Gain Tested Electro-Harmonix 12AU7 / ECC82 Vacuum Tube Built around the original GE 6189; this is a low microphonic, industrial-grade 12AU7. Flying Leads Plug&Play CV4034 - Premium 12AU7 ECC82 E82CC ECC802S 5814 6189 6680 CV491 CV4003 CV4113 CV4122 F6067 B749 M8136 13D5 7316 type. Tim's 12AU7 Tube Preamplifier Schematic. I love the rich tone of the octal tubes like the 6SL7 over that of the 9-pin tubes as the 12AX7. Many vacuum tube phono preamplifiers are designed using the 12AX7 and the 6SL7. Tung-Sol 12AX7 New Production Preamp Vacuum Tube. DOUBLE TRIODE. Can I solicit some opinions from anyone who has tried any octal preamp tubes? The 6SJ7 is a pentode preamp tube that was used in the first Fender Champ. It is a premium quality 12AU7 tube built to match the performance of the military/industrial original GE 6189 tube. I will build a 6SL7 or 12AX7 SRPP voltage amp to drive a UX-245 triode base on the above calculation on my single end stereo platform. NEW Shuguang Chinese 6N9P 6SL7 6H9C Vacuum Tube 2PCS - Direct Replacement of 6SL7 FREE SHIPPING WORLDWIDE DESCRIPTIONThe Shuguang Chinese 6N9P is direct replacement of 6SL7. 12AX7 6SL7 6SN7. These are sweet and rare versions of the 6SL7, and are plug and play compatible with any 6SL7 or 5691 type tube. The 7K7 triode is identical to the 6AT6/6Q7/6SL7 triodes. The great thing about the 6SL7 is that NOS tubes are readily available at affordable prices. Beam power amplifier used in vintage Gretsch and Magnatone amplifiers. 7k: Musical and sweet with extended bandwith. I actually read that review when it came out and have alway thought the SLP-94 a great preamp. The circuit looks fully OK to me. Good for phase inverters or reverb drivers. Worldwide shipping. So researching some options on a possible new phono stage, one which uses 12ax7s and another that uses 6922s. I've been living with a set of PSVANE 12AX7′s for a few weeks now and so far, these are great sounding tubes. As the title says, I am looking for some advice here. Tavish Design Vintage 6SL7 Phono Stage. The 7C6 triode is also similar. I quess you will only build the fixed RIAA, not all those switchable alternatives ?. Octal Tube Socket Numbers. And since the 6SL7 is also a 6 volt tube, it works flawlessly. The first EH 12AX7's were the exact same plate as the LPS which was 5/8" long. That said, many popular audio tubes are tested for mutual conductance in the upper panel Dyna-Jet sockets. These adapters allow you to use a 6SN7 as a replacement for a 12AU7, or a 6SL7 as a replacement for a 12AX7. Hand built 12AX7-based vacuum tube stereo preamplifier with tube power supply. Good post, Edmond. One of the members had suggested building a Super Simple Single Stage Preamp ("4S" Preamp for short) and there was much discussion concerning various tubes, gain, noise, etc. The 12AX7 is also used in many audio preamps and in guitar effects pedals. These are high gain tubes but high internal resistance so it is necessary to have 3 tubes on the signal path to reduce output impedance or use circuit topologies like SRPP (totem pole). You could also use a type 78 with a six-pin socket and grid cap, or the identical 6K7 with an octal base, or the later 6SK7. B: ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021. Watford Valves is a U. Ending Friday at 6:00PM PST. Source Legend: DC Dave Cigna / Francesco Piazza DM Me!. The MK1 C1 Chassis. Brand: Mullard Type: NOS Tube. Tube Depot carries a selection of 6SL7 Pre Amp Vacuum Tubes. Although miniature vacuum tubes (like the 12AX7) later became more popular in consumer equipment because of their smaller physical size, the 6SL7GT remained a favorite of. The Flagship All amps include a superior-quality custom sewed slip-cover. The 6SL7 is identical to the miniature 5751. Asked in MP3 Players Audio and Sound Systems. hp = Heptode Unit. You guys rock. At $99 per pair for their highest grade, the Shuguang Psvane (Pavane) 12AX7′s are a bargain. Higher lifetime is produced by the higher filament current. According to us, must a tube which can be used as equivalent, be at least for 95% have the same parameters as the tube he must replace. The only tubes I know are 1945 6SU7GTY Tung Sols, which I own, but what about the rest. For octal (8-pin) tubes the plate is pin 3 and the cathode is pin 8. The specs of the 6SN7 are closer to the 12AU7, not 12AX7. any thoughts? Thank you. Shuguang 6N8P (6SN7) $18. The sound signature is on par with 5692 types. For octal (8-pin) tubes the plate is pin 3 and the cathode is pin 8. This is a long plate valve so has a very rich tone. 5 watts plate dissipation, 450VDC Plate Voltage rating, electrically similar to 6CG7) (6SN7GTB is a controlled warm-up version of 6SN7GTA; 11 second heater warmup, 450VDC Plate Voltage rating. I've been living with a set of PSVANE 12AX7′s for a few weeks now and so far, these are great sounding tubes. Since 1996, Tube World, Inc. The 12AX7 has the highest gain at 100, the 12AT7 is lightly lower and the 12AU7 is the lowest gain of the group. This is reality: 6SL7 was a "junk-that-nobody-needs" tube ever from 1950 until the year 2000. Model shown : Low Gain Edition (2V Input Sensitivity) with full suit of Hashimoto (Sansui) Transformers, with max of 4. 174) I have the Sophia 6sn7's and no longer use them in my amp. Works well with solid state and tube amplifiers alike. 32 dB at midrange), and the LF roll-off is nearly identical. If Ebb = 400 volts then the grid voltage of the inverter and the plate voltage of the amplifier should be about 100 volts. (The 12AX7 has all the same less the shield, except the Chinese put in a shield without connecting it to anything, so you decide if that makes it a 12AX8. The first section of the table lists 4 digit and European types sorted in numerical and alphabetical order with USA type designations in the second column. The ECC83 family. A 12AU7 would have worked better in the long tail phase inverter position, but then the amp would not have enough sensitivity for the matching Troughline preamp which essentially has no line stage and just a 2 stage EF86 phono preamp. Superior quality custom ATA road-cases are also available. So each time I can find some NOS 6SN7, the same story repeats: I hope for 9mA or above, and what I get is 8mA or below, and. I found some recently but they were metal (dont know if there is a difference in tone). any thoughts? Thank you. Philips are what are mostly seen, if rarely. The 12AX7 is by far the best known preamp tube among guitar players. Electro-Harmonix has released a low noise, low microphonic version of the 12AX7 that meets all specifications required for the tube to be designated 7025. Tube 6SL7 or Röhre 6SL7 ID2112, Double Triode, Octal (Int. Very low microphonic. Preamp Tubes - 12AX7 / ECC83 / CV4004 / 5751 Tube Basics and FAQ. But the 6SN7 has a 600 ma heater current vs. ru: 6N9S*: html page 6SL7: MK buizen handboek: Frank Philipse (Pocnet mirror - Patrik Schindler). Source Legend: DC Dave Cigna / Francesco Piazza DM Me!. d = Diode Unit. 300 ma for the 12AU7. I think that they sound better. The only tubes I know are 1945 6SU7GTY Tung Sols, which I own, but what about the rest. Here is a list of all 9-pin / Noval tubes and 8-pin / Octal tubes with compatible pinouts. Even more impressive is the fantastic breakup / drive of this tube. Octal, IO) K8A, USA 1935 and Audio Frequency shown. We have the ECC81 ECC82 ECC83 was introduced specifically for audio applications way back in 1954 to replace the earlier 6SL7 octal based valves. 12AU7 is similar to ECC82 and 6189 and can be used interchangeably. Title: 6SL7GT 12SL7GT Author: General Electric Subject: JA-FP-2000-12-26 Created Date: 12/26/2000 8:39:03 PM. The great thing about the 6SL7 is that NOS tubes are readily available at affordable prices. Radio tubes are valves. So, if you have something to share, would appreciate very much. Well, seems 'WE replica' has been a theme for tube manufacturers from China. The Marshall/Fender phase inverter is commonly known as a "long-tail pair", or "Schmitt" type phase inverter, or phase splitter (actually, the original Schmitt inverter was a differential pair with a large "tail" resistor; the "standard" guitar amplifier phase inverter is a self-biased version of this circuit that works better with positive-only power supplies and. I found some recently but they were metal (dont know if there is a difference in tone). The original 7025 tube was a 12AX7 that was tested and selected for the lowest noise and microphonics for use in the critical first preamp stages of amplifiers where noise and microphonics. d = Diode Unit. It was developed around 1946 by RCA engineers in Camden, New Jersey, under developmental number A-4522. 32 dB at midrange), and the LF roll-off is nearly identical. Some say the VT-229 are slightly more focused then the 6SL7 but at over three times the price I hope thats true and not myth. The preamp is an octal 6SL7 (ancestor of the 12AX7). Tung-Sol 12AX7 New Production Preamp Vacuum Tube. Now we have: µ = 100 R A = 80K ohm. If running off 12. The 12AU7 can run on either 12. DATE CODES FOR RCA-MADE TUBES Ludwell Sibley There is a sort of fascination with the date codes that are found on tubes. Due to its rugged construction and conservative ratings, it is the most reliable current production EL84 type available for use in Vox AC-30 type amplifiers. 1), and seems to cause bewilderment and inspiration in equal measure, among many valve enthusiasts. So it's very much the circuit as JGR says. As a popular choice for guitar tube amplifiers, its ongoing use in such equipment makes it one of the few small-signal vacuum tubes in continuous production since it was introduced. Probably a majority of our favorite audio tubes can be tested in one of the pre-configured Dyna-Jet sockets. It was developed around 1946 by RCA engineers in Camden, New Jersey, under developmental number A-4522. The first section of the table lists 4 digit and European types sorted in numerical and alphabetical order with USA type designations in the second column. My amp offers many a tuberolling options as quoted below. anything but guitar amps. Beam power amplifier used in vintage Gretsch and Magnatone amplifiers. I actually read that review when it came out and have alway thought the SLP-94 a great preamp. (Same problem is with USA made 12AX7 NOS, many are below average nowadays, and they don't get better from storage, and burn in won't do the magic trick). The Best 6SL7-type tubes ever made? An Update If this is your first visit, be sure to check out the FAQ by clicking the link above. 雖然有人認為 6sl7 / 6sn7 的聲音,足以勝過當紅的 12ax7 / 12au7, 而且大腳、有底座的管子比較堅固耐用,較大的管身亮起來也比較美麗, 但除了 diy,目前單純使用 6sl7 / 6sn7 設計的前級並不多。 為什麼 ?! 1. However, a complicating factor in all this, too, is in a B-15, new 6SL7's sound not as ballsy and a little on the meh side compared to old ones, and I only use NOS in my B-15N for that reason, and I'm sure that's why the Heritage B-15 came with NOS 6SL7's. and several designs were presented using various dual triode tubes. Flying Leads Plug&Play CV4034 - Premium 12AU7 ECC82 E82CC ECC802S 5814 6189 6680 CV491 CV4003 CV4113 CV4122 F6067 B749 M8136 13D5 7316 type. 12bh7/ecc99 The 12BH7 is a medium gain dual triode used in hi-fi amplifiers, pro audio equipment and some guitar amplifier circuits. The 7F7 is identical to the 6SL7. ECC81 is 12AT7 medium gain pre-amplifying double triode. But the 6SN7 has a 600 ma heater current vs. And 5751s work pretty well in many non-phono applications as a substitute for a 12AX7. It's hard to compare directly, since those two tubes are not direct swappable. It's lower gain octal brother is the 6SN7 with amplification factor of about 20. It is a premium quality 12AU7 tube built to match the performance of the military/industrial original GE 6189 tube. The Holland made versions are similar in size to the "tall boy" USA types. Lower gain, with more drive than a 12AX7, these feature in many HiFi pre amps, power amps and guitar amps. 6SL7 / 5691: 70: 44k: Similar to 12ax7; fuller sounding, but noisier: 6SN7 / 5692: 20: 7. It provided a medium gain (20). I select a 12AX7 the databook said that µ = 100 and Ra= 80K ohm I made R = RAK = RK = 3. hp = Heptode Unit. If Ebb = 400 volts then the grid voltage of the inverter and the plate voltage of the amplifier should be about 100 volts. Let's examine how the distortion of a 12AX7 changes with the value of its plate voltage. ****OUT OF PRODUCTION***NLA****. GE used/tested ANOS 12AX7 & 12AX7A ( 1960s Gray Plates ) $ 20. The Tung-Sol EL84/6BQ5 is a popular EL84/6BQ5 tube for guitar amplifiers, such as those built by Gibson and Harmony. Philips are what are mostly seen, if rarely. I use the the 6SL7's in a piece of gear and the Sylvania's are my favorite, very similar to the 6SN7. 75 Tung-Sol FOUR QUAD Factory Platinum Matched GOLD 6SL7 6SL7GT GOLD Tubes. Ya, my B-15N has 6SL7's and I love it, yet my SVT and V4B have 12ax7's and I love them, too. I have also used hi-mu triodes, but 6N2P-EV tubes with practically similar topology and the results are good. The two front gain tubes in my Primaluna pr. Known in Europe under its Mullard-Philips vacuum tube designation ECC82, in fact, the 12AT7, 12AU7 and 12AX7 or the ECC81, ECC82 and ECC83 are all exactly the same vacuum tube but with varying electrode spacing and grid pitch to achieve the different characteristics. 6SL7/ECC35 7025 EL156 810 KT77 102D 12AT7/ECC81 12AU7/ECC82 12AX7/ECC83 12BH7 211 274B/5U4G/5Z3P 2A3 300B 350C 50CA10 572B 5881 6550 6L6 6SN7/CV181 6V6 805/805A 807/FU-7 811A/FU-811 812 845 EL34/6CA7 EL84 KT66 KT88 Psvane HiFi Series Replica Series Treasure MKII Series Treasure Series Golden Voice Shuguang Natural Sound Series Treasure Series. Very consistently made tube. The SRPP is a most enigmatic circuit (fig. TWIN TRIODE, 12AX7 datasheet, 12AX7 circuit, 12AX7 data sheet : GEC, alldatasheet, datasheet, Datasheet search site for Electronic Components and Semiconductors. Bottom is ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021 ( 12. Since 1996, Tube World, Inc. The bigger issue is the heaters. Ending Friday at 6:00PM PST. The 6SL7 is an octal twin triode with amplification factor (mu) of about 70. ****OUT OF PRODUCTION***NLA****. High frequency twin triode preamplifier tube used in studio and hi-fi equipment. An all-tube Carvin V3, equipped with five 12AX7 preamp and four EL34 power tubes. Preamp tubes take the small signal from your pickup and amplify it to "line level. The open sound with detailed, but not edgy midrange is to die for. At zero bias, a 12AX7 may do 4mA Ia, while a 6SN7 will hum along happily at 10mA. B: ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021. 6SN7GT US BRANDS TECHNICAL INFORMATION (6SN7GT and VT-231 have a 300VDC Max Plate Voltage rating, most are 1940's) (6SN7GTA is improved, uprated to 7. care to elaborate about that adapter??…6SL7 is indeed dual triode and octal. Gibson Tube Amp Specifications I would like to thank Björn Anger for permission to use the information contained here. It's hard to compare directly, since those two tubes are not direct swappable. Our thoughts go out to all who are affected by COVID-19. And the 6SN7 should sub for the 12AU7 if I am correct. So researching some options on a possible new phono stage, one which uses 12ax7s and another that uses 6922s. High gain, super low microphonics, and superb linearity with a three dimensional tone. Guitar Amp Design - A New Approach! Basic Theory - using 21st-Century technology to design vacuum tube preamps, power amps, and power supplies. Originally, the 12AX7 / ECC83 vacuum tube was introduced to be a superior option for lower noise and microphonics over the 6SL7 tube that was commonly used in the 1940s. NOS specs call the 5751 a "special 12AX7" having a high-mu amplification factor of 70. Today, a look at almost any guitar tube amp, be it Fender, Marshall, Vox, or any other, will prove the 12AX7 / ECC83 / 7025 tubes are here to stay. My siding with the 6SN7 tube over the 12Au7 is actually based on the air and ambiance, and complete lack of noise I have received from good octal tube preamps. Tube Depot carries a selection of 6SL7 Pre Amp Vacuum Tubes. A 6SL7 has the same gain factor as a 5751. These are sweet and rare versions of the 6SL7, and are plug and play compatible with any 6SL7 or 5691 type tube. Originally released in 1939 it was officially registered in 1941 by RCA and Sylvania as the glass-cased 6SN7GT, originally listed on page 235 of RCA's 1940 RC-14 Receiving Tube Manual, in the. The 6SN7 is a 6. Let's examine how the distortion of a 12AX7 changes with the value of its plate voltage. >What's your opinion of the 6EU7 vs. If you want to get an idea of the gain level of the 6SL7, try a 12AY7 or 12AT7 in there but again, I don't know if anything was done to your circuit to tame the 12AX7 (if anything) either way, it won't hurt the amp to try a lower gain, nine. Tube 6SL7 or Röhre 6SL7 ID2112, Double Triode, Octal (Int. Telefunken & others such as Raytheon 12ax7 black plate are not even close in performance compared to the RCA 12AX7 black plate. The MK1 C1 Chassis. 75 Electro-Harmonix QUINTET (FIVE) 12AX7 ECC83 GOLD PIN Preamp Tubes $ 71. You guys rock. Reflector 6H9C / 6SL7. So that may be a consideration unless you are building from scratch and take that into consideration. We're dedicated to helping you get the absolute best tone and performance out of your bass guitar. The Optimised SRPP Amp (Part 1) By Merlin Blencowe Some deceptively-simple circuits, explained for the audio amateur. I have always wanted an amp that used 6SL7's in the gain stage. I think that they sound better. 12AU7 is similar to ECC82 and 6189 and can be used interchangeably. This tube was first produced by RCA which called the 5691 one of it's "SPECIAL RED" tubes due to the red colored low. To make things easier to find, I've listed all the equivalents from the header, so some files will be duplicated. Known in Europe under its Mullard-Philips vacuum tube designation ECC82, in fact, the 12AT7, 12AU7 and 12AX7 or the ECC81, ECC82 and ECC83 are all exactly the same vacuum tube but with varying electrode spacing and grid pitch to achieve the different characteristics. The only tubes I know are 1945 6SU7GTY Tung Sols, which I own, but what about the rest. These usually have high-mounted cylindrical plates, and brown micanol bases. 12AX7 (also known as ECC83) is a vacuum tube that is a miniature dual triode - 6AV6 with high voltage gain. Otherwise DC on the heaters gets rid of this (assuming reasonably well filtered DC). A 6SN7 won't die with 600V on it and a 12AX7 will be a little plasma ball. For taming a bright system the RCA 6SL7 are recommended. Great tubes with great sound. interesting!. The first EH 12AX7's were the exact same plate as the LPS which was 5/8" long. I've got a used chassis already drilled for octals, and that's what got me to look into them. 12AU7 is double triode small size novel tube, it is used as inverter drive push-pull amplifier in amplifying circuit. Most SPICE model links are to Dave Cigna's stash of SPICE models provided by Francesco Piazza- these are marked DC. The octal preamp tubes I am familar with were used in tweed Fenders and many other vintage tube amps. Watford Valves is a U. 6K, and you may occasionally see very large value resistors, such as 470K or greater, in. The 12AX7 has no equivalent octal. Feedback received via email: "Hi Rachel, I received the 12AX7LS super tubes and their performance is super! Put the new tubes in and turn on, first 10 mins, comparing to Psvane 12AX7-TII…the new super tube has lower noise floor, sound is more dense and transparent, bass is deeper and better bass layering. This is a long plate valve so has a very rich tone. The 6SL7 would be used in similar applications to the 12AX7 - or to those in the EU, the ECC83 - as phase splitters, low-level preamp stages, etc. The 5751 version of the 12AXY tube is a military version that is rugged and has a lower Gain of 70. 12ax7 Direct Coupled Cathode Follower. For half a century, they were regarded crap. The "7" in the leading digit. At $99 per pair for their highest grade, the Shuguang Psvane (Pavane) 12AX7′s are a bargain. More information Saved by Randal Vaughan. The first EH 12AX7's were the exact same plate as the LPS which was 5/8" long. One of the members had suggested building a Super Simple Single Stage Preamp ("4S" Preamp for short) and there was much discussion concerning various tubes, gain, noise, etc. Moved Permanently. Highly recommended. Known in Europe under its Mullard-Philips vacuum tube designation ECC82, in fact, the 12AT7, 12AU7 and 12AX7 or the ECC81, ECC82 and ECC83 are all exactly the same vacuum tube but with varying electrode spacing and grid pitch to achieve the different characteristics. 6SL7 / 5691: 70: 44k: Similar to 12ax7; fuller sounding, but noisier: 6SN7 / 5692: 20: 7. I recently got a box of NOS tubes, among them several Mullard and Telefunken ECC83. It is frequently confused with other, vaguely similar-looking circuits,. Before you make the change, you might consider swapping a 5751 for the 12AX7 to see if you like the sound. hp = Heptode Unit. Tung-Sol 6V6GTs are the holy grail for players who crave the sound of a Fender Princeton, Deluxe or Champ, or those who revere the tone of the earliest Ampeg Jet and Rocket. com will in no way be held responsible (financially or otherwise) for equipment that is damaged from the use of tubes or parts purchased from us. This is reality: 6SL7 was a "junk-that-nobody-needs" tube ever from 1950 until the year 2000. Title: Unknown Author: Unknown Created Date: 11/16/1997 2:31:22 AM. The 12AT7 is another very well known tube among guitar players. Watford valves through its unique valve test equipment offer the most comprehensive and thorough valve test facilities on. Same result , in fact I recently used a 7F7 to drive a small 12B4a SET amp. Here is a list of all 9-pin / Noval tubes and 8-pin / Octal tubes with compatible pinouts. The type 5691 Tube is a "premium" version of the type 6SL7. The power tube is a cathode biased class A 6V6GT. Feedback received via email: “Hi Rachel, I received the 12AX7LS super tubes and their performance is super! Put the new tubes in and turn on, first 10 mins, comparing to Psvane 12AX7-TII…the new super tube has lower noise floor, sound is more dense and transparent, bass is deeper and better bass layering. 12AU7 is double triode small size novel tube, it is used as inverter drive push-pull amplifier in amplifying circuit. The open sound with detailed, but not edgy midrange is to die for. To make things easier to find, I've listed all the equivalents from the header, so some files will be duplicated. These are sweet and rare versions of the 6SL7, and are plug and play compatible with any 6SL7 or 5691 type tube. It was released for public sale under the 12AX7 identifier on September 15, 1947. The document has moved here. This is the legendary Telefunken ECC83 / 12AX7 with smooth gray plates and diamond imprint on the base. NOS performance and sound at a fraction. My siding with the 6SN7 tube over the 12Au7 is actually based on the air and ambiance, and complete lack of noise I have received from good octal tube preamps. I also concur with 6SL7 choice - have used both 6SL7 and 12AX7. The "premium" qualities of the 5692 include a long-life cathode rated at 10,000 hours along with extra support rods and mica spacers to eliminate microphonics. Shuguang 6N8P (6SN7) $18. Fortunately, the 12AX7 can be used with either 12 volt or 6 volt heaters. #N#Tube Testing Equipment. This the first Princeton to use the 12AX7 rather than the 6SL7 or 6SC7 of previous models. Wholesale & retail trade. Can someone speak to similarities and differences between 6N2P-EV and 12ax7, given that: Both are wired for their correct pin out @6. Cryo 12AX7 / ECC83 Cryo 12AY7 Cryo 12BH7 / 6350 Cryo 12DW7 / ECC832 Cryo 5751 Cryo 6922 / 6DJ8 / E88CC / 6N1P Cryo 6C45PI Cryo 6CG7 / 6FQ7 Cryo 6H6P / ECC99 / E182CC Cryo 6N23P-EV Cryo 6N30P Cryo 6SL7GT / 5691 Cryo 6SN7 / 5692 / 6H8C Cryo EF86 Super Cryo Preamp Tubes Cryo Power Tubes-> Cryo Rectifier Tubes-> NOS 12AT7 NOS 12AU7 NOS 12AX7 NOS 12BH7. Octal Tube Socket Numbers. TWIN TRIODE, 12AX7 datasheet, 12AX7 circuit, 12AX7 data sheet : GEC, alldatasheet, datasheet, Datasheet search site for Electronic Components and Semiconductors. This tube is sometimes called the equivalent for 6DJ8/ECC88 or 6922/E88CC. Philips are what are mostly seen, if rarely. Model shown : Low Gain Edition (2V Input Sensitivity) with full suit of Hashimoto (Sansui) Transformers, with max of 4. Best regards Thomas. Can I solicit some opinions from anyone who has tried any octal preamp tubes? The 6SL7 is listed in the RCA tube manual as high Mu, so that's what I was going on. [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. We're dedicated to helping you get the absolute best tone and performance out of your bass guitar. ECC35 has another operating point, but it will fit in normal 6SL7 circuits, since this is a high gain tube and auto bias is functioning very nice with high gain tubes. Some say they have all the best attributes of the 5691, with better richness and vocal clarity. Designed to compliment to Aqua 274B and Classic 300B tubes, the new 6SN7 is a great choice to replace vintage 6SN7 tubes in all tube pre-amplifiers and tube amplifiers. Home › Preamp Tubes. 6SN7/6SL7 tubes are not in anyway compatible with 6AS7/6080/6H13C tubes. Primaluna silver 12AU7 Wow! Just received a matched pair of the grade A Sophia 12au7's and they sound detailed with plenty of air around intruments with a slight warm tone and controlled bass. Diode Rectification. This is the driver. Tung-Sol 12AX7 New Production Preamp Vacuum Tube. 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. p = Pentode Unit. com will in no way be held responsible (financially or otherwise) for equipment that is damaged from the use of tubes or parts purchased from us. How to use 6N1P and 6N2P Russian tube.