6sl7 Vs 12ax7

The New York Audio Show 2015 was a more intimate affair than previous, held outside the five boroughs - at the Hilton Westchester in Ryebrook NY - and attended primarily by diehard audio enthusiasts willing to brave the travel outside the City proper. Heard a few folks mention that they find 6922s too "clinical. This is the driver. The new solid plate, triple getter Ruby KT88V-STR has excellent reliability, focused soundstage, and a wide linear frequency response. bjlefebvre AK Subscriber Subscriber. How to use 6N1P and 6N2P Russian tube. To make things easier to find, I've listed all the equivalents from the header, so some files will be duplicated. - tubes included : 3 6SN7, 1 6SL7, 1 12AX7, 1 6X5 - max. Philips are what are mostly seen, if rarely. So 6SL7-5751 is a much better match. These usually have high-mounted cylindrical plates, and brown micanol bases. Gibson Tube Amp Specifications I would like to thank Björn Anger for permission to use the information contained here. The 6SL7 is an octal twin triode with amplification factor (mu) of about 70. I love the rich tone of the octal tubes like the 6SL7 over that of the 9-pin tubes as the 12AX7. The octal preamp tubes I am familar with were used in tweed Fenders and many other vintage tube amps. 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. 83 (2 new offers). The bigger issue is the heaters. Without going into some of the more obscure tube types, I played with the 12xxx series, 6SN7/6SL7 types, 5687 and the 6922/6DJ8. So it's very much the circuit as JGR says. Best regards Thomas. compared to 12AX7's and ECC81's. 6AV6,6SQ7, and 12AX7 triodes. 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. 2-3 Months Lead Time , Your choice of our 9 Factory Colours. Beam power amplifier used in vintage Gretsch and Magnatone amplifiers. d = Diode Unit. The nine-pin 12AX7 has a amplification factor of 100. 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. output voltage = 5V, amplification gain = 10(line stage) - phono EQ : MM, RIAA curve - size :see more. 18watt Technical Discussion. The 6SL7 has a little lower plate resistance and a bit higher Gm; this means you'll get slightly more gain with the 6SL7 than the 5751, when using the same cathode and plate resistors. ECC81 is 12AT7 medium gain pre-amplifying double triode. 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. 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. Full and chimey mids, a tight bottom end and greatly reduced hum and noise characterize this tube. I've got a used chassis already drilled for octals, and that's what got me to look into them. Tung-Sol SINGLE Factory Tested 6SN7 6SN7GTB Tube $ 23. 0 out of 5 stars 1 More Buying Choices $17. Radio tubes are valves. 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. The 6SL7 has a little lower plate resistance and a bit higher Gm; this means you'll get slightly more gain with the 6SL7 than the 5751, when using the same cathode and plate resistors. Tube Depot carries a selection of 6SL7 Pre Amp Vacuum Tubes. Tube Testing Equipment. com 636-939-9190. 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. Get the guaranteed best price on Preamp Tubes like the Groove Tubes Stubti-Tube 1 6SL7 to 12AX7 Octal to 9-Pin Adapter at Musician's Friend. Again the power section is flawed in these amps and uses a similar configuration as the octal models. NOS specs call the 5751 a "special 12AX7" having a high-mu amplification factor of 70. 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. 數量比較少,也缺乏價位便宜的管子可替代。. NOS 12AX7 NOS 12BH7 NOS 6922 / 7308 / 6DJ8 / CV2493 NOS Rectifier NOS EF86 NOS 6SL7 5691 NOS 5842 NOS 6SJ7 5693 NOS 6SN7 5692 NOS 6CG7/6FQ7 NOS 6U8 6HG8 ECF86 NOS Power Tubes-> Amplifier Cryoset Cables. Why We Don't Sell Certain Brands. 12AX7 Williamson First stage alone. Linearity is good but as with other high mu vacuum tubes, large voltage swings aren't possible. 75 Electro-Harmonix QUINTET (FIVE) 12AX7 ECC83 GOLD PIN Preamp Tubes $ 71. The 12AX7 spec octal equivalent is the 6SL7, and the 6SL7 tube definitely will not work. Tube 6SL7 or Röhre 6SL7 ID2112, Double Triode, Octal (Int. More information Saved by Randal Vaughan. High frequency twin triode preamplifier tube used in studio and hi-fi equipment. Though 6SL7 is similar to ECC83, which NOS version is very expensive, and 6SL7 is even older. 6SN7GTB TUNG-SOL. The type 5691 Tube is a "premium" version of the type 6SL7. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. For example, a local audio shop sells 12AX7 to 6SL7, 6CG7 to 6SN7, and 12AU7 to 6SN7 adapters and I bought four of each. Before you make the change, you might consider swapping a 5751 for the 12AX7 to see if you like the sound. 6SL7 / 5691: 70: 44k: Similar to 12ax7; fuller sounding, but noisier: 6SN7 / 5692: 20: 7. 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. Bonne Terre, MO 63628 [email protected] For half a century, they were regarded crap. I think that they sound better. 12AT7 - ECC81 Another popular twin triode. Tung-Sol 6SL7GT. It is the Sovtek 12AX7LPS. It provided a medium gain (20). (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. Very consistently made tube. Title: Unknown Author: Unknown Created Date: 11/16/1997 2:31:22 AM. How to use 6N1P and 6N2P Russian tube. The SRPP is a most enigmatic circuit (fig. The 12AX7 is by far the best known preamp tube among guitar players. 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. Those old guys knew a thing or two about amplifiers. Though 6SL7 is similar to ECC83, which NOS version is very expensive, and 6SL7 is even older. For taming a bright system the RCA 6SL7 are recommended. 6SL7 Tubes Below is our current selection of 6SL7 audio tubes. Model shown : Low Gain Edition (2V Input Sensitivity) with full suit of Hashimoto (Sansui) Transformers, with max of 4. Title: 6SL7GT 12SL7GT Author: General Electric Subject: JA-FP-2000-12-26 Created Date: 12/26/2000 8:39:03 PM. I have not tried any other types. Also included in this comparison are direct substitutes for the 12AX7 including ECC83, ECC803, 7025 and 5751. Home > Pre Tubes > 12AX7 ECC83 ECC803S E83CC 7025 CV4004 CV492 CV4035 M8137 M8214 6057 6681 > Mullard ECC83 - Rare 1950s Long Plate Square or Halo Getters CV492 Label - Blackburn or Mitcham Gt. As well it offered more gain. bjlefebvre AK Subscriber Subscriber. interesting!. 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. The 7C6 triode is also similar. Tube Testing Equipment. The 12AU7 can run on either 12. " As the signal passes through, preamp tubes influence the various EQ stages found in your amp, such as distortion, gain boost, tremolo and reverb. I use the the 6SL7's in a piece of gear and the Sylvania's are my favorite, very similar to the 6SN7. hx = Hexode Unit. It retains all of the definition and detail that the ECC83S short plate and the ECC803S long plate tubes have but it has. Same result , in fact I recently used a 7F7 to drive a small 12B4a SET amp. 6SL7 is an octal 12AX7. 12AX7, 2-6BM8, 5Y3 GA-6: 12AY7, 6SL7, 2-6V6, 5Y3 GA-6 Lancer: 2-12AX7, 2-6V6, 5Y3 (identical to GA-14 Titan except for 12" speaker) GA-5 Skylark: 12AX7, 6V6, 5Y3. 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. Worldwide shipping. This tube performs 4. The ECC83 family. 6SN7 / 5692 Tube List. Heard a few folks mention that they find 6922s too "clinical. The power tube is a cathode biased class A 6V6GT. Again the power section is flawed in these amps and uses a similar configuration as the octal models. A favorite is the 50's "Chrome Dome", black plate w/square getter. Download datasheet for this tubes here. 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. - tubes included : 3 6SN7, 1 6SL7, 1 12AX7, 1 6X5 - max. Don't miss this opportunity to hear one of the best sounding--and hardest to find--12AX7s ever made! Choose from tubes that test as new or good. 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 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. System Design - a professional methodology for crafting a complete guitar amplifier. Tim's 12AU7 Tube Preamplifier Schematic. The SRPP is a most enigmatic circuit (fig. 12AX7 (also known as ECC83) is a vacuum tube that is a miniature dual triode - 6AV6 with high voltage gain. 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. NOS specs call the 5751 a "special 12AX7" having a high-mu amplification factor of 70. This tube was first produced by RCA which called the 5691 one of it's "SPECIAL RED" tubes due to the red colored low. Both have built - in shield. I quess you will only build the fixed RIAA, not all those switchable alternatives ?. The TJ was a much different story, this tube showed an improvement across the board. and several designs were presented using various dual triode tubes. In most applications, but not all, RCA 12AX7 black plate are fantastic. Get a low price and free shipping on thousands of items. 12AX7 Williamson First stage alone. Electronic Schematics Electronic Kits Electronic Engineering Electrical Engineering Dc Circuit Circuit Diagram Valve Amplifier Hobby Electronics Headphone Amp. Radio tubes are valves. Classifieds: FOR SALE - Another 26 Audio Vacuum Tube Lot ECC83 6SN7 6SL7 6CA4 5Y3 12AV7 asking for $225. (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. To start viewing messages, select the forum that you want to visit from the selection below. NOS 12AX7 NOS 12BH7 NOS 6922 / 7308 / 6DJ8 / CV2493 NOS Rectifier NOS EF86 NOS 6SL7 5691 NOS 5842 NOS 6SJ7 5693 NOS 6SN7 5692 NOS 6CG7/6FQ7 NOS 6U8 6HG8 ECF86 NOS Power Tubes-> Amplifier Cryoset Cables. Flying Leads Plug&Play CV4034 - Premium 12AU7 ECC82 E82CC ECC802S 5814 6189 6680 CV491 CV4003 CV4113 CV4122 F6067 B749 M8136 13D5 7316 type. Qty: * Click to read more: T-7581A-TUNG The best current production 6SL7 available. - tubes included : 3 6SN7, 1 6SL7, 1 12AX7, 1 6X5 - max. 6AV6,6SQ7, and 12AX7 triodes. The type 5691 Tube is a "premium" version of the type 6SL7. ****OUT OF PRODUCTION***NLA****. Vintage European and US 12AX7, ECC83, 5751, 7025, CV4004, CV492, and M8137 tubes in stock now, fully tested and guaranteed. And 6 volts is correct. Humble Beginnings. 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. 6K, and you may occasionally see very large value resistors, such as 470K or greater, in. Great tubes with great sound. 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. Download datasheet for this tubes here. It utilizes a medium length ribbed plate design that is much like the old Amperex and Brimar European designs. I recently got a box of NOS tubes, among them several Mullard and Telefunken ECC83. A robustly built stereo Single-Ended amplifier utilizing the KT88 Pentode in either Triode or Ultra-Linear mode producing up to 18 watts per. Pricing & History. anything but guitar amps. bjlefebvre AK Subscriber Subscriber. 12AX7 Williamson First stage alone. Some say they have all the best attributes of the 5691, with better richness and vocal clarity. I actually read that review when it came out and have alway thought the SLP-94 a great preamp. You really can't use a 6SN7's in circuits designed for 12AX7's because the tubes do not have the same electrical characteristics. Some tweaks could be made to compensate for that if the 6SL7 loses too much HF. At $99 per pair for their highest grade, the Shuguang Psvane (Pavane) 12AX7′s are a bargain. JJ Electronic ECC83MG - 12AX7 Factory Data Sheet: ECC83MG Our observations: Another 12AX7 variant from JJ. The type 5691 Tube is a "premium" version of the type 6SL7. 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. Out of curiousity I built an octal to noval converter, and plugged in an ECC83 where the 6SL7 input tube normally goes, as they are very roughly equivalent tubes. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. abt 70% of 12ax7… funky old tube 6SL7 microphonics may add hum/noise but a decidedly more old school edge. 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. GE used/tested 7025 $25. NOS specs call the 5751 a "special 12AX7" having a high-mu amplification factor of 70. 6SL7-GT: Acrobat PDF 133K 12SL7-GT: Acrobat PDF 23K: National Valve Museum: 6SL7GT: html, html2: oldradio. 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. 6922 Gold Pin (also E88CC) Premium gold pin version of 6922. This is rare one. Title: Unknown Author: Unknown Created Date: 11/16/1997 2:31:22 AM. If Ebb = 400 volts then the grid voltage of the inverter and the plate voltage of the amplifier should be about 100 volts. The MK1 B1 Chassis 12AX7 Power Tubes 2, 25L6. If you're looking for great-sounding vacuum tubes, fast shipping and superior customer service, then you have come to the right place. 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. I think a 6SL7 be a good sub for the 12AX7 with the same 300 ma heater current. Ham Call: WB0SND. 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. FWIW: The 6SL7 which has the exact same pinout as the 6SN7 has about the same gain as a 5751. The 12AX7 will have a bit more gain (34 vs. Tube 6SL7 or Röhre 6SL7 ID2112, Double Triode, Octal (Int. 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. These are sweet and rare versions of the 6SL7, and are plug and play compatible with any 6SL7 or 5691 type tube. For guitar amps it can be imagined to be a simulation of a pentode, and indeed the circuit does resemble one. 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 7C6 triode is also similar. The 12AX7 is by far the best known preamp tube among guitar players. That is why the RCA 12AX7 black plate are expensive. It was developed around 1946 by RCA engineers in Camden, New Jersey, under developmental number A-4522. Preamp Tubes 12AX7 12AU7 12AT7 ECC81 ECC82 ECC83 E88CC 6922 6SN7 EF86 12BH7 Melbourne Australia 6SL7. A: 6SN7 or 6SL7,ECC32,ECC33,ECC35,5691,6592,B65. All 12AT7 - ECC81 valves come AMPLITREX AT1000 or MAXIMATCHER tested. Very smooth and warm sound. Tube 6SL7 or Röhre 6SL7 ID2112, Double Triode, Octal (Int. New production & NOS pre amp compatible tubes from Tung-Sol, Sovtek & other various brands!. If Ebb = 400 volts then the grid voltage of the inverter and the plate voltage of the amplifier should be about 100 volts. Telefunken & others such as Raytheon 12ax7 black plate are not even close in performance compared to the RCA 12AX7 black plate. These preamp tubes are getting more expensive and harder to find. PSVANE 12AX7′s are fantastic tubes! February 6, 2011. 1590 West Algonquin Road #111 Hoffman Estates, IL 60192 Voice Phone 847-496-4546, Monday-Friday 8AM to 4PM USA Central Time. They are electrically and sonically quite different. If you can't find any, check for the 12V heater cousin. 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. It was developed around 1946 by RCA engineers in Camden, New Jersey, under developmental number A-4522. The open sound with detailed, but not edgy midrange is to die for. Brand: Mullard Type: NOS Tube. Hand built 12AX7-based vacuum tube stereo preamplifier with tube power supply. Natural Sound 6SL7-T. 2-3 Months Lead Time , Your choice of our 9 Factory Colours. I've done this a hundred times ,I even use 12ax7,12au7. Out of curiousity I built an octal to noval converter, and plugged in an ECC83 where the 6SL7 input tube normally goes, as they are very roughly equivalent tubes. Don't make the mistake of thinking solely in terms of voltage—current is equally important in a buffer's design. I use the the 6SL7's in a piece of gear and the Sylvania's are my favorite, very similar to the 6SN7. They are good quality and found in many Chinese amps and preamps. 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. 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. 13 (46%) Tung Sol 6V6GT Platinum Matched Duet Tubes. Otherwise a bad sample sounds just as clinical as a bad 12AX7. In many cases, these tubes are interchangeable and can easily be swapped. But its plate resistance is ~1/5th of the 5751's, and Gm is about 4x higher. Those old guys knew a thing or two about amplifiers. While not exact, it would give you the opportunity to audition the sonics before changing out the socket. 6SN7GTB TUNG-SOL. 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. All That Jazz ( A Thread for the Seriously Addicted ). Stay well, stay safe. 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. How to use 6N1P and 6N2P Russian tube. Tavish Design's Vintage 6SL7 Phono Stage is a passively-equalized, two-gain-stage design using the 6SL7GT octal dual triode, a vacuum tube first introduced (by RCA) in 1941. This is the legendary Telefunken ECC83 / 12AX7 with smooth gray plates and diamond imprint on the base. Model shown : Low Gain Edition (2V Input Sensitivity) with full suit of Hashimoto (Sansui) Transformers, with max of 4. Harmonically rich, with a detailed low end and a warm high end. 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. htm) says 5751 is an equivalent to 6SL7. Tube Interchangability Reference. 12bh7/ecc99 The 12BH7 is a medium gain dual triode used in hi-fi amplifiers, pro audio equipment and some guitar amplifier circuits. To start viewing messages, select the forum that you want to visit from the selection below. Grading and Matching. Over the past several months, I have been working on a new 2015 Musica Bella LeAnna preamp circuit. 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. System Design - a professional methodology for crafting a complete guitar amplifier. 6SL7/5691/6SU7. So researching some options on a possible new phono stage, one which uses 12ax7s and another that uses 6922s. Some tweaks could be made to compensate for that if the 6SL7 loses too much HF. I love the rich tone of the octal tubes like the 6SL7 over that of the 9-pin tubes as the 12AX7. (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. The nine-pin 12AX7 has a amplification factor of 100. Even more impressive is the fantastic breakup / drive of this tube. 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. Probably a majority of our favorite audio tubes can be tested in one of the pre-configured Dyna-Jet sockets. Grid Resistors - Why Are They Used? General. 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. The Tung Sol 12AX7 is warm and big musically. 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. 6922 vs 12ax7 - "clinical"? Discussion in 'Tube Audio' started by bjlefebvre, Sep 26, 2016. Leak 20 - Mullard style circuit using 3 x 12AX7. t = Triode Unit. Those old guys knew a thing or two about amplifiers. Same result , in fact I recently used a 7F7 to drive a small 12B4a SET amp. 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. Customers who bought this item also bought. Don't use them to swap a 6SN7 into a 12AX7 socket - the gain of the 6SN7 is too low and audio quality will suffer. 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. As well it offered more gain. Reflector 6H9C / 6SL7. any thoughts? Thank you. 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. 6SN7 / 5692 Tube List. While there are many different types of preamp tubes, the most common type is the classic 12AX7. I have also used hi-mu triodes, but 6N2P-EV tubes with practically similar topology and the results are good. 12AX7 Williamson First stage alone. interesting!. 75 Tung-Sol FOUR QUAD Factory Platinum Matched GOLD 6SL7 6SL7GT GOLD 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 "7" in the leading digit. Classifieds: FOR SALE - Another 26 Audio Vacuum Tube Lot ECC83 6SN7 6SL7 6CA4 5Y3 12AV7 asking for $225. These usually have high-mounted cylindrical plates, and brown micanol bases. ? by hilldweller » Sun Nov 24, 2013 7:24 pm Yea, I thought a bigger tube with bigger plate surface would be a better choice and that is what I will probably use. Original 400mA filament current tube. Related pages : 6SL7 6SL7GT 6SL7GTB 6SL7WGT 5691 VT-229 CV1985 CV569… 6SL7GT RCA Coin Base; 6SL7GT General Electric VT229 Silver Plates (Chrome). Some tweaks could be made to compensate for that if the 6SL7 loses too much HF. People also love these ideas. A robustly built stereo Single-Ended amplifier utilizing the KT88 Pentode in either Triode or Ultra-Linear mode producing up to 18 watts per. I am interested in short glass version only please. So that may be a consideration unless you are building from scratch and take that into consideration. 5 out of 5 stars. The above SPICE models for various valves and most of these models are for use with PSpice from Orcad. My Favorite Tubes and Their Substitutes by Robert H. As the title says, I am looking for some advice here. The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications. Low output. Radio tubes are valves. 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. It utilizes a medium length ribbed plate design that is much like the old Amperex and Brimar European designs. 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. Super linearity, low noise, and full performance ratings make this one of the best 6SN7 tubes ever made. The 12ax7 is a a more aggressive sometimes harsh tube that though ubiquitous, isn't a favorite of mine. FWIW: The 6SL7 which has the exact same pinout as the 6SN7 has about the same gain as a 5751. The Tung Sol 12AX7 is warm and big musically. 137: RE: TJ / Sophia 6SN7 & 6SL7 (8. Now we have: µ = 100 R A = 80K ohm. 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. And the 6SN7 should sub for the 12AU7 if I am correct. The bigger issue is the heaters. Hand built 12AX7-based vacuum tube stereo preamplifier with tube power supply. 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 real 6973, not a rebrand of a "close" tube. Im thinking of getting at least one or two Groove Tubes Substitube. 4 Vintage Fisher Telefunken 12AX7 ECC83 Stereo Tubes. Tube Basics and FAQ. 1590 West Algonquin Road #111 Hoffman Estates, IL 60192 Voice Phone 847-496-4546, Monday-Friday 8AM to 4PM USA Central Time. Mullard 12AX7 $19. With the 12AX7 being such a popular tube in vintage as well as current preamplifiers, a great 12AX7 is always in demand. 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. This tube provides a fat and smooth tone, overall more musical than the newer 12AX7 (kinda like the difference between a 6V6 and an EL84, to give some perspective). 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. TJ Music Full Music Vacuum Tubes Treasure From China Swapping the EH 12AX7 for a very expensive Telefunken just muddied up the midrange and switching to a Mullard slowed down the presentation and increased background noise. Don't use them to swap a 6SN7 into a 12AX7 socket - the gain of the 6SN7 is too low and audio quality will suffer. The 6SL7 is very much like a 12AX7, but it's gain rating is 70 compared to 100. #N#Tube Testing Equipment. Chinese Psvane 12AU7-T MKII. Get a low price and free shipping on thousands of items. The basis for this amp started out as a post in a thread on the DIY Audio Projects Forum site. with an adapter with no problem in my socket modified Dyna Pass II. For guitar amps it can be imagined to be a simulation of a pentode, and indeed the circuit does resemble one. Tube Basics and FAQ. The SRPP is a most enigmatic circuit (fig. And 5751s work pretty well in many non-phono applications as a substitute for a 12AX7. I have not tried any other types. A completely hand-wired, true tube preamplifier using full tube rectification, tube regulation and point to point wiring. Very consistently made tube. Those old guys knew a thing or two about amplifiers. Why We Don't Sell Certain Brands. This is rare one. (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. 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. The type 5691 Tube is a "premium" version of the type 6SL7. The ECC83 MG is a "Mid Gain" 12AX7 type tube. Philips are what are mostly seen, if rarely. Low output. 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. 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. The 12AU7 vacuum tube was first marketed back in October 18, 1946. The octal preamp tubes I am familar with were used in tweed Fenders and many other vintage tube amps. Fender went back to a grid leak biased first gain stage giving the amp a gritty sound. 100% hand-made in the USA. Linearity is good but as with other high mu vacuum tubes, large voltage swings aren't possible. 0 out of 5 stars 1 More Buying Choices $17. Brand: Mullard Type: NOS Tube. Good post, Edmond. With the 12AX7 being such a popular tube in vintage as well as current preamplifiers, a great 12AX7 is always in demand. Flying Leads Plug&Play CV4033 - Premium 12AT7 ECC81 E81CC ECC801S 6201 6060 CV455 CV4024 type. Download datasheet for this tubes here. The JJ 5751 is a drop-in replacement for any 12AX7 / ECC83 tube. They were very inexpensive. 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 SRPP is a most enigmatic circuit (fig. The Optimised SRPP Amp (Part 1) By Merlin Blencowe Some deceptively-simple circuits, explained for the audio amateur. 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 specs of the 6SN7 are closer to the 12AU7, not 12AX7. 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. If you can't find any, check for the 12V heater cousin. Original 400mA filament current tube. Guaranteed by Wed, Feb 12. Related pages : 6SL7 6SL7GT 6SL7GTB 6SL7WGT 5691 VT-229 CV1985 CV569… 6SL7GT RCA Coin Base; 6SL7GT General Electric VT229 Silver Plates (Chrome). ru: 6N9S*: html page 6SL7: MK buizen handboek: Frank Philipse (Pocnet mirror - Patrik Schindler). The 12AT7 is another very well known tube among guitar players. The 6SL7 is an octal twin triode with amplification factor (mu) of about 70. With the 12AX7 being such a popular tube in vintage as well as current preamplifiers, a great 12AX7 is always in demand. Title: 6SL7GT 12SL7GT Author: General Electric Subject: JA-FP-2000-12-26 Created Date: 12/26/2000 8:39:03 PM. Re: 6SL7 vs 12AX7 Whats the dif. 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. 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. This tube has a very clear and warm sound that was built to last. Source Legend: DC Dave Cigna / Francesco Piazza DM Me!. K company that was established in the early 1990s' and has become one of Europe's leading suppliers of tested, graded and guaranteed valves and components to the professional music and audio industry. I have not tried any other types. " VT-229 RCA - Black Base, Black Round Plates, graphite coating - If your system sounds a little too analytical, harsh or electronic this may be your favorite tube. Customers who bought this item also bought. Good for phase inverters or reverb drivers. ****OUT OF PRODUCTION***NLA****. 6922 Gold Pin (also E88CC) Premium gold pin version of 6922. People also love these ideas. At zero bias, a 12AX7 may do 4mA Ia, while a 6SN7 will hum along happily at 10mA. These usually have high-mounted cylindrical plates, and brown micanol bases. 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. Once thing interesting about Loktal's. Wholesale & retail trade. The 6SN7 is a 6. The nine-pin 12AX7 has a amplification factor of 100. But the 6SN7GT is arguably the best general-purpose audio triode. Features (2) 12AX7's, (1) 5AR4 rectifier, and (2) OD3 Regulator tubes. 2-3 Months Lead Time , Your choice of our 9 Factory Colours. 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. Vintage European and US 12AX7, ECC83, 5751, 7025, CV4004, CV492, and M8137 tubes in stock now, fully tested and guaranteed. A very rare European type of 6SL7. 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. Same result , in fact I recently used a 7F7 to drive a small 12B4a SET amp. The 12AX7 will have a bit more gain (34 vs. the 12AX7? > >Thanks. Eli Duttman has said that the 6SL7 is very close to 12AX7 except for the mu. 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. 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. The MK1 B1 Chassis 12AX7 Power Tubes 2, 25L6. Beam power amplifier used in vintage Gretsch and Magnatone amplifiers. It utilizes a medium length ribbed plate design that is much like the old Amperex and Brimar European designs. Even more impressive is the fantastic breakup / drive of this tube. The -3 dB HF roll-off is higher for the 12AX7 due to its lower input capacitance. Diode Rectification. It is a single ended class A amplifier and features a Custom All Tube Guitar Amp Cascode 12ax7 Push Pull 6v6. They are all Dual Triodes, meaning there are 2 gain stages in each tube. At $99 per pair for their highest grade, the Shuguang Psvane (Pavane) 12AX7′s are a bargain. The Tung-Sol EL84/6BQ5 is a popular EL84/6BQ5 tube for guitar amplifiers, such as those built by Gibson and Harmony. Out of curiousity I built an octal to noval converter, and plugged in an ECC83 where the 6SL7 input tube normally goes, as they are very roughly equivalent tubes. The TJ was a much different story, this tube showed an improvement across the board. Grading and Matching. For half a century, they were regarded crap. So that may be a consideration unless you are building from scratch and take that into consideration. It's high gain makes it popular in guitar amps, though it's also widely used in HiFi amps, especially in phono stages. The power tube is a cathode biased class A 6V6GT. I know some folks claim 6EU7 sounds better than 12AX7, but given that they're from the same manufacturer and vintage, they're electrically and mechanically identical except for the pinout. This is reality: 6SL7 was a "junk-that-nobody-needs" tube ever from 1950 until the year 2000. Vintage European and US 12AX7, ECC83, 5751, 7025, CV4004, CV492, and M8137 tubes in stock now, fully tested and guaranteed. Tung-Sol 6SL7GT. INTRODUCTION. These usually have high-mounted cylindrical plates, and brown micanol bases. 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. The type 5691 Tube is a "premium" version of the type 6SL7. I know some folks claim 6EU7 sounds better than 12AX7, but given that they're from the same manufacturer and vintage, they're electrically and mechanically identical except for the pinout. com 636-939-9190. I found some recently but they were metal (dont know if there is a difference in tone). They are just as well performing. The 6SN7, is so close to a 12AU7 that I would say any sort of self split 12AU7 design would work identically with a 6SN7. I select a 12AX7 the databook said that µ = 100 and Ra= 80K ohm I made R = RAK = RK = 3. The 6SN7 is basically two 6J5 triodes in one envelope. A low-noise, low-microphony 5751, 12AX7, or 7025 is also usable, though they will have more voltage gain and will change the sound of the amp considerably. Very consistently made tube. 2-3 Months Lead Time , Your choice of our 9 Factory Colours. 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. Are 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. There seem to be a bazillion. 13 (46%) Tung Sol 6V6GT Platinum Matched Duet Tubes. The 12AT7 is another very well known tube among guitar players. 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 messed around with similar high mu valves , in my case I compared 7F7 (loctal 6SL7) to 6GK5 , ECC83 and 5755. ****OUT OF PRODUCTION***NLA****. This is rare one. A 6SL7 has the same gain factor as a 5751. I use the the 6SL7's in a piece of gear and the Sylvania's are my favorite, very similar to the 6SN7. The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. output voltage = 5V, amplification gain = 10(line stage) - phono EQ : MM, RIAA curve - size :see more. The matched quad of the Mullard CV491 Long Plates cost me a small fortune. To start viewing messages, select the forum that you want to visit from the selection below. NOS 6SL7 are quite plentiful and cheaper than a NOS 12AX7. This includes such classics as 6L6, 6V6, 6550, 6CA7, 12AX7, 12AU7, 6SN7, 6SL7, 12BH7, 12AY7, etc. 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. NOS specs call the 5751 a "special 12AX7" having a high-mu amplification factor of 70. 6SL7/5691/6SU7. These were replacing the stock Primaluna silver 12au7's. The chain of 12AX7's start to break up. If you're looking for great-sounding vacuum tubes, fast shipping and superior customer service, then you have come to the right place. Most SPICE model links are to Dave Cigna's stash of SPICE models provided by Francesco Piazza- these are marked DC. Some tweaks could be made to compensate for that if the 6SL7 loses too much HF. Watford Valves is a U. The 6SN7 is a medium gain tube (similar to a 12AU7) while the 12AX7 is high gain. p = Pentode Unit. Any 12AX7 or 7025 is usable here-it need not be low-noise or low-hum, nor does it need to be tested for microphony. If you can't find any, check for the 12V heater cousin. Once thing interesting about Loktal's. A favorite is the 50's "Chrome Dome", black plate w/square getter. And 6 volts is correct. The circuit looks fully OK to me. Radio tubes are valves. Just a preamp and I have it running into Fender PA with 2 5881 and a 12AX7 like a brownface 6G6B. Title: Unknown Author: Unknown Created Date: 11/16/1997 2:31:22 AM. Going on to Loktal tubes we find the 7B4,and 7B6 triodes identical with the 6AV6. The Long-Tail Pair. 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. 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. The 12AU7 vacuum tube was first marketed back in October 18, 1946. The 6SJ7 tested was very close to specifications, despite its age. Thanks to its design it also peforms with very low noise and microphonics. A very rare European type of 6SL7. It provided a medium gain (20). TC Tubes and Audio Repair Repair services include tube and solid state gear, turn table set-up, and tube-testing in Twin Cities Metro Area. That is why the RCA 12AX7 black plate are expensive. These usually have high-mounted cylindrical plates, and brown micanol bases. In most applications, but not all, RCA 12AX7 black plate are fantastic. The MK1 C1 Chassis. So is for instance a 6DJ8 wich is made in the sixties by Philips (in the. Same result , in fact I recently used a 7F7 to drive a small 12B4a SET amp. 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. The SRPP is a most enigmatic circuit (fig. But the 6SN7 has a 600 ma heater current vs. Read More $24. Very consistently made tube. Robin, thank you for the specs. High frequency twin triode preamplifier tube used in studio and hi-fi equipment. 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. It has the same pinout as the 12AX7 but is not electrically compatible and is taller. NOS performance and sound at a fraction. The Optimised SRPP Amp (Part 1) By Merlin Blencowe Some deceptively-simple circuits, explained for the audio amateur. Guaranteed by Wed, Feb 12. Electronic Schematics Electronic Kits Electronic Engineering Electrical Engineering Dc Circuit Circuit Diagram Valve Amplifier Hobby Electronics Headphone Amp. The 7K7 triode is identical to the 6AT6/6Q7/6SL7 triodes. The Tung Sol 12AX7 is warm and big musically. 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. The 7F7 is identical to the 6SL7. Im thinking of getting at least one or two Groove Tubes Substitube. 6SN7GTB TUNG-SOL. The chain of 12AX7's start to break up. We're dedicated to helping you get the absolute best tone and performance out of your bass guitar. The type 5691 Tube is a "premium" version of the type 6SL7. The cathode resistor in a typical triode preamp is bypassed with a large capacitor to eliminate a form of negative. it won't hurt your preamp. DOUBLE TRIODE. 6SN7 is a dual triode vacuum tube with an 8-pin octal base. Octal Tube Socket Numbers. 300 ma for the 12AU7. Then because the microphonics were high they changed to a short plate that is 1/2" and this helped to quiet them down some. ANOS RAYTHEON LONG BLACK PLATE 12AX7 $35. As well it offered more gain. This is a long one folks. Bonne Terre, MO 63628 [email protected] FLUXION BL-2A tube preamplifier with MM phono EQ, upgraded version. Otherwise DC on the heaters gets rid of this (assuming reasonably well filtered DC). Many vacuum tube phono preamplifiers are designed using the 12AX7 and the 6SL7. Just a preamp and I have it running into Fender PA with 2 5881 and a 12AX7 like a brownface 6G6B. New production & NOS pre amp compatible tubes from Tung-Sol, Sovtek & other various brands! Mullard 12AX7 / ECC83 New Production Preamp Vacuum Tube. There are many versions of the 12AX7 tube and many brands. 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 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications. - tubes included : 3 6SN7, 1 6SL7, 1 12AX7, 1 6X5 - max. 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. Tubes in the "Tube" column are directly replaceable with tubes in the "Replacement" column. This is a long plate valve so has a very rich tone. Source Legend: DC Dave Cigna / Francesco Piazza DM Me!. B: ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021. These preamp tubes are getting more expensive and harder to find. 6SN7GTB TUNG-SOL. How to use 6N1P and 6N2P Russian tube. the 12AX7? > >Thanks. Even the 60's gray plate round getter sound great! Many times when you run tubes out of spec 6V vs. 6SN7 is a dual triode vacuum tube with an 8-pin octal base. As a result the El34's in the Laney example get a big final push from the pre-amp stages. These old octals are streets ahead of noval valves , I just don't understand all the fuss surrounding these 'exotic' ECC83 variants. Linearity is good but as with other high mu vacuum tubes, large voltage swings aren't possible. 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. 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. Don't make the mistake of thinking solely in terms of voltage—current is equally important in a buffer's design. This is rare one. Im thinking of getting at least one or two Groove Tubes Substitube. 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. A 6SL7 has the same gain factor as a 5751. Why would you replace the octal 12AU7 (read :6SN7)with a 12AX7(6SL7) BTW, the EL 34 is much easier to drive than any 6l6 type. Title: Unknown Author: Unknown Created Date: 11/16/1997 2:31:22 AM. Electronic Schematics Electronic Kits Electronic Engineering Electrical Engineering Dc Circuit Circuit Diagram Valve Amplifier Hobby Electronics Headphone Amp. Telefunken & others such as Raytheon 12ax7 black plate are not even close in performance compared to the RCA 12AX7 black plate. CV569 Mullard Military designation for ECC35. The 12AU7 can run on either 12. Get a low price and free shipping on thousands of items. Im thinking of getting at least one or two Groove Tubes Substitube. 18watt Technical Discussion. 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. A robustly built stereo Single-Ended amplifier utilizing the KT88 Pentode in either Triode or Ultra-Linear mode producing up to 18 watts per. But its plate resistance is ~1/5th of the 5751's, and Gm is about 4x higher. As a result the El34's in the Laney example get a big final push from the pre-amp stages. 75 Electro-Harmonix QUINTET (FIVE) 12AX7 ECC83 GOLD PIN Preamp Tubes $ 71. 18watt Technical Discussion. The most popular of this family is the ECC83. t = Triode Unit. The MK1 C1 Chassis. >What's your opinion of the 6EU7 vs. Octal, IO) K8A, USA 1935 and Audio Frequency shown. I have also used hi-mu triodes, but 6N2P-EV tubes with practically similar topology and the results are good. 6SL7/5691/6SU7. These usually have high-mounted cylindrical plates, and brown micanol bases. The classic information, on early RCA tubes in particular, is Bro. They are all Dual Triodes, meaning there are 2 gain stages in each tube. Well, seems 'WE replica' has been a theme for tube manufacturers from China. So that may be a consideration unless you are building from scratch and take that into consideration. Get a low price and free shipping on thousands of items. 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. Im thinking of getting at least one or two Groove Tubes Substitube.
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