Flying Leads Plug&Play CV4033 - Premium 12AT7 ECC81 E81CC ECC801S 6201 6060 CV455 CV4024 type. 3 K ohm and find the RL is 123 K ohm by F 45, 120 K is practical. hx = Hexode Unit. 1), and seems to cause bewilderment and inspiration in equal measure, among many valve enthusiasts. Instead of the 76 tube, I used one half of the 6SL7 for the first preamp stage and the other half of the same 6SL7 for the second stage of the preamp, so the schematic is the same, it just uses one 6SL7 per channel, and no 76 tubes. 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. System Design - a professional methodology for crafting a complete guitar amplifier. Also included in this comparison are direct substitutes for the 12AX7 including ECC83, ECC803, 7025 and 5751. Before you make the change, you might consider swapping a 5751 for the 12AX7 to see if you like the sound. Again the power section is flawed in these amps and uses a similar configuration as the octal models. Wholesale & retail trade. IIRC, the heater wires inside the cathode are twisted to help cancel hum fields. NOS 6SL7 are quite plentiful and cheaper than a NOS 12AX7. With the 12AX7 being such a popular tube in vintage as well as current preamplifiers, a great 12AX7 is always in demand. These adapters allow you to use a 6SN7 as a replacement for a 12AU7, or a 6SL7 as a replacement for a 12AX7. 5 out of 5 stars. The first EH 12AX7's were the exact same plate as the LPS which was 5/8" long. Hand built 12AX7-based vacuum tube stereo preamplifier with tube power supply. Customers who bought this item also bought. Here is a list of all 9-pin / Noval tubes and 8-pin / Octal tubes with compatible pinouts. 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. 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. They were very inexpensive. 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. The 12AX7 will have a bit more gain (34 vs. 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. 6SN7/6SL7 tubes are not in anyway compatible with 6AS7/6080/6H13C tubes. Superior quality custom ATA road-cases are also available. The Holland made versions are similar in size to the "tall boy" USA types. (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). This the first Princeton to use the 12AX7 rather than the 6SL7 or 6SC7 of previous models. Great tubes with great sound. They are all Dual Triodes, meaning there are 2 gain stages in each tube. Those old guys knew a thing or two about amplifiers. 12AX7 Basics The 12AX7 is a 9-pin miniature, high-mu, twin triode. The lovely hard rock tone magically appears! Sovtek 12AX7LPS. And the 6SN7 should sub for the 12AU7 if I am correct. It utilizes a medium length ribbed plate design that is much like the old Amperex and Brimar European designs. Classifieds: FOR SALE - Another 26 Audio Vacuum Tube Lot ECC83 6SN7 6SL7 6CA4 5Y3 12AV7 asking for $225. 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 Tungsol 12AU7W / 6189 is a brand new pre-amp tube that is made in Russia. Grading and Matching. I think that they sound better. JJ 6V6S Power Vacuum Tube. PSVANE 12AX7′s are fantastic tubes! February 6, 2011. That is why the RCA 12AX7 black plate are expensive. Positive Feedback ISSUE 76 november/december 2014. The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications. It has the same pinout as the 12AX7 but is not electrically compatible and is taller. The 12AX7 spec octal equivalent is the 6SL7, and the 6SL7 tube definitely will not work. The 12AX7 is also used in many audio preamps and in guitar effects pedals. I think that they sound better. 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 adapter would have to drop down the 12 volt filament to 6 volts for that to work. 2-3 Months Lead Time , Your choice of our 9 Factory Colours. With the 12AX7 being such a popular tube in vintage as well as current preamplifiers, a great 12AX7 is always in demand. 12at7,12bz7 & 6dj8/ecc88 etc. 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. Vacuum Tube Warranty & Return Policy. 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 12AU7 can run on either 12. 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. Diode Rectification. Telefunken & others such as Raytheon 12ax7 black plate are not even close in performance compared to the RCA 12AX7 black plate. The SRPP is a most enigmatic circuit (fig. The 12AT7 is another very well known tube among guitar players. I also concur with 6SL7 choice - have used both 6SL7 and 12AX7. My Favorite Tubes and Their Substitutes by Robert H. 12AX7 Williamson First stage alone. I actually read that review when it came out and have alway thought the SLP-94 a great preamp. The JJ 5751 is a drop-in replacement for any 12AX7 / ECC83 tube. 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. This tube is sometimes called the equivalent for 6DJ8/ECC88 or 6922/E88CC. That is why the RCA 12AX7 black plate are expensive. The bigger issue is the heaters. Thanks to its design it also peforms with very low noise and microphonics. For taming a bright system the RCA 6SL7 are 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. Tung-Sol 12AX7 New Production Preamp Vacuum Tube. 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. 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. Here is the page: I had an octal pre wired in parallel to the 12AX7 V1 of. The SRPP is a most enigmatic circuit (fig. [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. Beam power amplifier used in vintage Gretsch and Magnatone amplifiers. 6SL7 is an octal 12AX7. Northern Electric 6SL7. It was released for public sale under the 12AX7 identifier on September 15, 1947. BRENT JESSEE RECORDING & SUPPLY, INC. For more information on 6SL7 vacuum tubes including pinouts, ratings, application and possible substitutions visit 6SL7 in Duncan Amps , and 6SL7 in The Tube Directory. 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. Moved Permanently. 6SN7 / 5692 Tube List. The sound signature is on par with 5692 types. 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. Octal, IO) K8A, USA 1935 and Audio Frequency shown. Once thing interesting about Loktal's. But this one is not an exact replica of Western Electric tube; instead it is a 'plus' version with slightly different structure - for example, getter for More Info ». 1), and seems to cause bewilderment and inspiration in equal measure, among many valve enthusiasts. It is a dependable, high mu double triode with reduced gain and clearer, more articulated tone than a higher gain ECC83. SRPP vs cathode follower, right pre out tubes for you 12AU7 6SN7, no good 12AX7 6SL7 12AT7 진공관앰프→ 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. New production & NOS pre amp compatible tubes from Tung-Sol, Sovtek & other various brands! Mullard 12AX7 / ECC83 New Production Preamp Vacuum Tube. The Tungsol 12AU7W / 6189 is a brand new pre-amp tube that is made in Russia. anything but guitar amps. Super linearity, low noise, and full performance ratings make this one of the best 6SN7 tubes ever made. " 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. A 6SN7 won't die with 600V on it and a 12AX7 will be a little plasma ball. I wanted to get more focused and open sound and this has been a nice upgrade from the standard 12ax7. DOUBLE TRIODE. Stay well, stay safe. We carry the highest quality pickups, preamps, and bass guitar parts including hard to find items from top brand names like Bartolini, Aguilar, and Nordstrand. Tube Interchangability Reference. 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 5751 version of the 12AXY tube is a military version that is rugged and has a lower Gain of 70. Customers who bought this item also bought. GE used/tested ANOS Long Plate 12AX7 (these sound great in Fender amps) $20. 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. To make things easier to find, I've listed all the equivalents from the header, so some files will be duplicated. An all-tube Carvin V3, equipped with five 12AX7 preamp and four EL34 power tubes. More information Saved by Randal Vaughan. I think a 6SL7 be a good sub for the 12AX7 with the same 300 ma heater current. Best regards Thomas. Northern Electric 6SL7. So 6SL7-5751 is a much better match. 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. Some tweaks could be made to compensate for that if the 6SL7 loses too much HF. 75 Tung-Sol FOUR QUAD Factory Platinum Matched GOLD 6SL7 6SL7GT GOLD Tubes. The 45-triode sound signature is even more pronounce, liquid, and silky. If running off 12. 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. I select a 12AX7 the databook said that µ = 100 and Ra= 80K ohm I made R = RAK = RK = 3. A 6SN7 won't die with 600V on it and a 12AX7 will be a little plasma ball. The 12AX7 spec octal equivalent is the 6SL7, and the 6SL7 tube definitely will not work. Thanks for your replies gentlemen. You really can't use a 6SN7's in circuits designed for 12AX7's because the tubes do not have the same electrical characteristics. JJ 6V6S Power Vacuum Tube. 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. Why We Don't Sell Certain Brands. Thanks to its design it also peforms with very low noise and microphonics. 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. There seem to be a bazillion. Over the past several months, I have been working on a new 2015 Musica Bella LeAnna preamp circuit. Tung-Sol SINGLE Factory Tested 6SN7 6SN7GTB Tube $ 23. 0 out of 5 stars 1 More Buying Choices $17. compared to 12AX7's and ECC81's. B: ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021. It was developed around 1946 by RCA engineers in Camden, New Jersey, under developmental number A-4522. with an adapter with no problem in my socket modified Dyna Pass II. Vo = 10 v RMS. The 6SF5 is even less common among tube audio designers today than the 6J5. ****OUT OF PRODUCTION***NLA****. This tube has a very clear and warm sound that was built to last. Well, seems 'WE replica' has been a theme for tube manufacturers from China. Vacuum Tube Warranty & Return Policy. The 12ax7 is a a more aggressive sometimes harsh tube that though ubiquitous, isn't a favorite of mine. 12ax7 Direct Coupled Cathode Follower. Mullard 12AX7 is an excellent all rounder, Mullard 12AX7 is one of the top choices for. With the 12AX7 being such a popular tube in. 6V in your amp the 6SN7 is not interchangeable. 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. anything but guitar amps. I have a 6B4G SET amp with 6SL7 input and 6SL7 driver tubes. Thanks to its design it also peforms with very low noise and microphonics. Octal, IO) K8A, USA 1935 and Audio Frequency shown. 6K, and you may occasionally see very large value resistors, such as 470K or greater, in. The 45-triode sound signature is even more pronounce, liquid, and silky. 18watt Technical Discussion. The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications. 6AV6,6SQ7, and 12AX7 triodes. Low output. 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. Thanks to its design it also peforms with very low noise and microphonics. The 7F7 is identical to the 6SL7. 12AU7 is double triode small size novel tube, it is used as inverter drive push-pull amplifier in amplifying circuit. com 636-939-9190. The MK1 C1 Chassis. The new solid plate, triple getter Ruby KT88V-STR has excellent reliability, focused soundstage, and a wide linear frequency response. Telefunken & others such as Raytheon 12ax7 black plate are not even close in performance compared to the RCA 12AX7 black plate. Probably a majority of our favorite audio tubes can be tested in one of the pre-configured Dyna-Jet sockets. Going on to Loktal tubes we find the 7B4,and 7B6 triodes identical with the 6AV6. it won't hurt your preamp. 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. 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. output voltage = 5V, amplification gain = 10(line stage) - phono EQ : MM, RIAA curve - size :see more. Read More $24. Very low microphonic. Title: 12AX7 6AX7 Author: Sylvania Subject: JA-FP-2002-03-23 Created Date: 3/24/2002 12:54:30 AM. Guaranteed by Wed, Feb 12. >What's your opinion of the 6EU7 vs. It's lower gain octal brother is the 6SN7 with amplification factor of about 20. The only tubes I know are 1945 6SU7GTY Tung Sols, which I own, but what about the rest. For half a century, they were regarded crap. High frequency twin triode preamplifier tube used in studio and hi-fi equipment. But its plate resistance is ~1/5th of the 5751's, and Gm is about 4x higher. "In addition to the stock driver, you can also use a NOS 6SN7, 6SL7, 6188, 6SU7GTY. It is the Sovtek 12AX7LPS. What a fantastic tube for a blusy drive sound, and it still produces a fantastic clean sound when not overdriven. I think a 6SL7 be a good sub for the 12AX7 with the same 300 ma heater current. Good post, Edmond. The Long-Tail Pair. [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. Qty: * Click to read more: T-7581A-TUNG The best current production 6SL7 available. I have also messed around with similar high mu valves , in my case I compared 7F7 (loctal 6SL7) to 6GK5 , ECC83 and 5755. Also included in this comparison are direct substitutes for the 12AX7 including ECC83, ECC803, 7025 and 5751. Octal, IO) K8A, USA 1935 and Audio Frequency shown. Highly recommended. 6SN7/6SL7 tubes are not in anyway compatible with 6AS7/6080/6H13C tubes. The 12AX7 will have a bit more gain (34 vs. That said, many popular audio tubes are tested for mutual conductance in the upper panel Dyna-Jet sockets. 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. 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. This includes such classics as 6L6, 6V6, 6550, 6CA7, 12AX7, 12AU7, 6SN7, 6SL7, 12BH7, 12AY7, etc. Title: 6SL7GT 12SL7GT Author: General Electric Subject: JA-FP-2000-12-26 Created Date: 12/26/2000 8:39:03 PM. And 6 volts is correct. 18watt Technical Discussion. 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. These adapters allow you to use a 6SN7 as a replacement for a 12AU7, or a 6SL7 as a replacement for a 12AX7. These usually have high-mounted cylindrical plates, and brown micanol bases. Superior quality custom ATA road-cases are also available. Otherwise DC on the heaters gets rid of this (assuming reasonably well filtered DC). While there are many different types of preamp tubes, the most common type is the classic 12AX7. Home › Preamp Tubes. I found some recently but they were metal (dont know if there is a difference in tone). ? 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. The two front gain tubes in my Primaluna pr. The 12AU7 can run on either 12. 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 sound signature is on par with 5692 types. 75 Electro-Harmonix QUINTET (FIVE) 12AX7 ECC83 GOLD PIN Preamp Tubes $ 71. Ham Call: WB0SND. A good example of the remote-cutoff pentode is the type 39/44, which uses a 5-pin base and a grid cap, so it is interesting to experiment with. These preamp tubes are getting more expensive and harder to find. 6SN7/5692/VT231. 6V in your amp the 6SN7 is not interchangeable. 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. Flying Leads Plug&Play CV4034 - Premium 12AU7 ECC82 E82CC ECC802S 5814 6189 6680 CV491 CV4003 CV4113 CV4122 F6067 B749 M8136 13D5 7316 type. 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 Tung-Sol EL84/6BQ5 is a popular EL84/6BQ5 tube for guitar amplifiers, such as those built by Gibson and Harmony. The bigger issue is the heaters. 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. It utilizes a medium length ribbed plate design that is much like the old Amperex and Brimar European designs. bjlefebvre AK Subscriber Subscriber. The 12AX7 has no equivalent octal. The above SPICE models for various valves and most of these models are for use with PSpice from Orcad. The octal preamp tubes I am familar with were used in tweed Fenders and many other vintage tube amps. Also, people has used a 5751 in placed of a 1AX7 and this website (http://www. 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. This is a real 6973, not a rebrand of a "close" tube. Vacuum Tube Warranty & Return Policy. Related products. 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. JJ Electronic ECC83MG - 12AX7 Factory Data Sheet: ECC83MG Our observations: Another 12AX7 variant from JJ. What a fantastic tube for a blusy drive sound, and it still produces a fantastic clean sound when not overdriven. CV569 Mullard Military designation for ECC35. 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. 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. ECC35 MULLARD NOS TUBE 6SL7 CV539 VT229. Good for phase inverters or reverb drivers. Ubiquitous use in such equipment makes it one of the few small-signal valves in continuous production since it was introduced, in 1946. Tube Testing Equipment. The ECC83 MG is a "Mid Gain" 12AX7 type tube. The preamp is an octal 6SL7 (ancestor of the 12AX7). 12AX7 6SL7 6SN7. It is the Sovtek 12AX7LPS. It's hard to compare directly, since those two tubes are not direct swappable. In many cases, these tubes are interchangeable and can easily be swapped. A 6SN7 won't die with 600V on it and a 12AX7 will be a little plasma ball. Just a preamp and I have it running into Fender PA with 2 5881 and a 12AX7 like a brownface 6G6B. The 6SF5 is even less common among tube audio designers today than the 6J5. We have the ECC81 ECC82 ECC83 was introduced specifically for audio applications way back in 1954 to replace the earlier 6SL7 octal based valves. 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. Mullard 12AX7 $19. 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. Some say they have all the best attributes of the 5691, with better richness and vocal clarity. Vo = 10 v RMS. Also included in this comparison are direct substitutes for the 12AX7 including ECC83, ECC803, 7025 and 5751. This is a long plate valve so has a very rich tone. Tube Interchangability Reference. 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 ECC83 MG is a "Mid Gain" 12AX7 type tube. 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. 174) I have the Sophia 6sn7's and no longer use them in my amp. Preamp Tubes 12AX7 12AU7 12AT7 ECC81 ECC82 ECC83 E88CC 6922 6SN7 EF86 12BH7 Melbourne Australia 6SL7. Octal-type dual triodes are available that perform similarly to the 12AX7 and the 12AU7. The type 5691 Tube is a "premium" version of the type 6SL7. Telefunken & others such as Raytheon 12ax7 black plate are not even close in performance compared to the RCA 12AX7 black plate. But the 6SN7 has a 600 ma heater current vs. 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. Before you make the change, you might consider swapping a 5751 for the 12AX7 to see if you like the sound. >What's your opinion of the 6EU7 vs. Among the 3, there's no exact match the way there is with 6SF5 or 6SQ7 and 12AX7. Some say they have all the best attributes of the 5691, with better richness and vocal clarity. If you're looking for great-sounding vacuum tubes, fast shipping and superior customer service, then you have come to the right place. 12bh7/ecc99 The 12BH7 is a medium gain dual triode used in hi-fi amplifiers, pro audio equipment and some guitar amplifier circuits. 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 Flagship All amps include a superior-quality custom sewed slip-cover. JJ 6V6S Power Vacuum Tube. any thoughts? Thank you. 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. Good post, Edmond. They are electrically and sonically quite different. 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). People also love these ideas. I asked Craig about using a 12AX7 to 6SL7 adapter in my Zana Deux, and he explained that while it might be possible he doesn't recommend it because the 6C33C-S tubes are biased with the 6SL7 and. 1), and seems to cause bewilderment and inspiration in equal measure, among many valve enthusiasts. The 12AU7 vacuum tube was first marketed back in October 18, 1946. 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. This is a real 6973, not a rebrand of a "close" tube. p = Pentode Unit. The following should be direct substitutions. The bigger issue is the heaters. In most applications, but not all, RCA 12AX7 black plate are fantastic. Tung-Sol SINGLE Factory Tested 6SN7 6SN7GTB Tube $ 23. Good post, Edmond. The Optimised SRPP Amp (Part 1) By Merlin Blencowe Some deceptively-simple circuits, explained for the audio amateur. Tube 6SL7 or Röhre 6SL7 ID2112, Double Triode, Octal (Int. 6K, and you may occasionally see very large value resistors, such as 470K or greater, in. It was released for public sale under the 12AX7 identifier on September 15, 1947. If running off 12. Flying Leads Plug&Play CV4033 - Premium 12AT7 ECC81 E81CC ECC801S 6201 6060 CV455 CV4024 type. These are the 6SN7 and the 6SL7, respectively, plus their 12-V cousins, the 12SN7 and the 12SL7. 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. GE used/tested 7025 $25. 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. High gain, super low microphonics, and superb linearity with a three dimensional tone. Again the power section is flawed in these amps and uses a similar configuration as the octal models. The first EH 12AX7's were the exact same plate as the LPS which was 5/8" long. Even the 60's gray plate round getter sound great! Many times when you run tubes out of spec 6V vs. 6V in your amp the 6SN7 is not interchangeable. Vintage European and US 12AX7, ECC83, 5751, 7025, CV4004, CV492, and M8137 tubes in stock now, fully tested and guaranteed. In most applications, but not all, RCA 12AX7 black plate are fantastic. The ECC83 family. It provided a medium gain (20). Tavish Design Vintage 6SL7 Phono Stage. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. 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. Best regards Thomas. 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. Moved Permanently. 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 the legendary Telefunken ECC83 / 12AX7 with smooth gray plates and diamond imprint on the base. 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. They sound great and were the seated "incumbents" in my reference system. 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. I have also messed around with similar high mu valves , in my case I compared 7F7 (loctal 6SL7) to 6GK5 , ECC83 and 5755. Telefunken & others such as Raytheon 12ax7 black plate are not even close in performance compared to the RCA 12AX7 black plate. net/Equiv_similar. 6SN7 / 5692 Tube List. We need a mention the fourth member of the Sovtek 12AX7 family. You really can't use a 6SN7's in circuits designed for 12AX7's because the tubes do not have the same electrical characteristics. (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. 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. These were replacing the stock Primaluna silver 12au7's. ****OUT OF PRODUCTION***NLA****. 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. 137: RE: TJ / Sophia 6SN7 & 6SL7 (8. Classifieds: FOR SALE - Another 26 Audio Vacuum Tube Lot ECC83 6SN7 6SL7 6CA4 5Y3 12AV7 asking for $225. The 12ax7 is a a more aggressive sometimes harsh tube that though ubiquitous, isn't a favorite of mine. Tube Testing Equipment. DATE CODES FOR RCA-MADE TUBES Ludwell Sibley There is a sort of fascination with the date codes that are found on tubes. Interested in this item? Contact right sound now! Forum Messages. " As the signal passes through, preamp tubes influence the various EQ stages found in your amp, such as distortion, gain boost, tremolo and reverb. This tube is labeled for either Fisher or Dynaco and says made in West Germany. The 7F7 is identical to the 6SL7. Vintage European and US 12AX7, ECC83, 5751, 7025, CV4004, CV492, and M8137 tubes in stock now, fully tested and guaranteed. They are good quality and found in many Chinese amps and preamps. 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. 12AU7 is similar to ECC82 and 6189 and can be used interchangeably. 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. Very smooth and warm sound. Sophia Electric™ 12AU7 vs. For 9-Pin preamp tubes like the 12AX7 the plates are pins 1 and 6 and the cathodes are pins 3 and 8 (measure between pins 1 and 3 for A; 6 and 8 for B). Flying Leads Plug&Play CV4035 - Premium 12AX7 ECC83 ECC803S E83CC 7025 CV4004 CV492 M8137 M8214 6057 type. 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. 174) I have the Sophia 6sn7's and no longer use them in my amp. The ECC83 MG is a "Mid Gain" 12AX7 type tube. People also love these ideas. These old octals are streets ahead of noval valves , I just don't understand all the fuss surrounding these 'exotic' ECC83 variants. Again the power section is flawed in these amps and uses a similar configuration as the octal models. Humble Beginnings. 數量比較少,也缺乏價位便宜的管子可替代。. In most amp circuits, it is common for each stage to be controlled by one preamp tube. This is rare one. The 7F7 is identical to the 6SL7. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. For taming a bright system the RCA 6SL7 are recommended. Michael Marx 105 N. Sophia Electric™ 12AU7 vs. 6N1P and 6N2P are the most popular small signal twin triodes in Russian audio. d = Diode Unit. 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 Tungsol 12AU7W / 6189 is a brand new pre-amp tube that is made in Russia. In most applications, but not all, RCA 12AX7 black plate are fantastic. 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. The type 5691 Tube is a "premium" version of the type 6SL7. How to use 6N1P and 6N2P Russian tube. 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. The 6SL7 is an octal twin triode with amplification factor (mu) of about 70. 75 Tung-Sol FOUR QUAD Factory Platinum Matched GOLD 6SL7 6SL7GT GOLD Tubes. Grading and Matching. This tube was first produced by RCA which called the 5691 one of it's "SPECIAL RED" tubes due to the red colored low. The above SPICE models for various valves and most of these models are for use with PSpice from Orcad. Browse products from the Vacuum Tubes category - listing products sorted by popular, Made in Russia. 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. Harmonically rich, with a detailed low end and a warm high end. interesting!. The 7C6 triode is also similar. Octal, IO) K8A, USA 1935 and Audio Frequency shown. Leak 20 - Mullard style circuit using 3 x 12AX7. Classifieds: FOR SALE - Another 26 Audio Vacuum Tube Lot ECC83 6SN7 6SL7 6CA4 5Y3 12AV7 asking for $225. Very consistently made tube. Can be also used as replacement for 12AX7 in many applications. FWIW: The 6SL7 which has the exact same pinout as the 6SN7 has about the same gain as a 5751. INTRODUCTION. Messages: 2,461 Location: Washington DC-ish. 3 K ohm and find the RL is 123 K ohm by F 45, 120 K is practical. 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 the VT-229 are slightly more focused then the 6SL7 but at over three times the price I hope thats true and not myth. It has a much lower Gain output at 60. 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. Over the past several months, I have been working on a new 2015 Musica Bella LeAnna preamp circuit. Circa 1958 K61 series long plate GB-made Mitcham Mullard 12AU7 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. And the 6SN7 should sub for the 12AU7 if I am correct. New Gain Tested Electro-Harmonix 12AU7 / ECC82 Vacuum Tube Built around the original GE 6189; this is a low microphonic, industrial-grade 12AU7. ECC35 MULLARD NOS TUBE 6SL7 CV539 VT229. Thanks for your replies gentlemen. These usually have high-mounted cylindrical plates, and brown micanol bases. 100% hand-made in the USA. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. 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. 6V in your amp the 6SN7 is not interchangeable. New production & NOS pre amp compatible tubes from Tung-Sol, Sovtek & other various brands!. Northern Electric 6SL7. I have a 6B4G SET amp with 6SL7 input and 6SL7 driver tubes. It provided a medium gain (20). The idea behind 6EU7 is that by rearranging the pins, there'd be less filament hum pickup. 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. it won't hurt your preamp. Wholesale & retail trade. For octal (8-pin) tubes the plate is pin 3 and the cathode is pin 8. The 12AU7 vacuum tube was first marketed back in October 18, 1946. So that may be a consideration unless you are building from scratch and take that into consideration. I select a 12AX7 the databook said that µ = 100 and Ra= 80K ohm I made R = RAK = RK = 3. 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. The ECC83 family. This is a real 6973, not a rebrand of a "close" tube. The 6SJ7 tested was very close to specifications, despite its age. System Design - a professional methodology for crafting a complete guitar amplifier. And the 6SN7 should sub for the 12AU7 if I am correct. 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. Wholesale & retail trade. The type 5691 Tube is a "premium" version of the type 6SL7. Bottom is ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021 ( 12. I also concur with 6SL7 choice - have used both 6SL7 and 12AX7. I think that they sound better. ECC35 MULLARD NOS TUBE 6SL7 CV539 VT229. #N#Tube Testing Equipment. It was developed around 1946 by RCA engineers in Camden, New Jersey, under developmental number A-4522. Sophia Electric™ 12AU7 vs. Â It was time to stop enjoying for a second and get into some serious listening with two other great tubes: the CBS-Hytron 5814 and Westinghouse 12au7 Carbon Plates. 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. You may have to register before you can post: click the register link above to proceed. 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. Tung-Sol 6SL7GT. 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. You have given me something to ponder and I am probably a little closer to trying it. it won't hurt your 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. JJ 6V6S Power Vacuum Tube. Re: 6SL7 vs 12AX7 Whats the dif. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. Vacuum Tube Warranty & Return Policy. This tube has a very clear and warm sound that was built to last. The lovely hard rock tone magically appears! Sovtek 12AX7LPS. Otherwise a bad sample sounds just as clinical as a bad 12AX7. Title: 12AX7 6AX7 Author: Sylvania Subject: JA-FP-2002-03-23 Created Date: 3/24/2002 12:54:30 AM. If you're looking for great-sounding vacuum tubes, fast shipping and superior customer service, then you have come to the right place. 6922 vs 12ax7 - "clinical"? Discussion in 'Tube Audio' started by bjlefebvre, Sep 26, 2016. For taming a bright system the RCA 6SL7 are recommended. Guitar Amp Design - A New Approach! Basic Theory - using 21st-Century technology to design vacuum tube preamps, power amps, and power supplies. Well, seems 'WE replica' has been a theme for tube manufacturers from China. According to us, must a tube which can be. 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. 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 open sound with detailed, but not edgy midrange is to die for. I have a 6B4G SET amp with 6SL7 input and 6SL7 driver tubes. 6SL7 / 5691: 70: 44k: Similar to 12ax7; fuller sounding, but noisier: 6SN7 / 5692: 20: 7. These are sweet and rare versions of the 6SL7, and are plug and play compatible with any 6SL7 or 5691 type tube. I actually read that review when it came out and have alway thought the SLP-94 a great preamp. GE used/tested ANOS 12AX7 & 12AX7A ( 1960s Gray Plates ) $ 20. it won't hurt your preamp. They are good quality and found in many Chinese amps and preamps. Interested in this item? Contact right sound now! Forum Messages. Some say they have all the best attributes of the 5691, with better richness and vocal clarity. I am interested in short glass version only please. The 7C6 triode is also similar. Once thing interesting about Loktal's. The 6SF5 is even less common among tube audio designers today than the 6J5. 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. Stay well, stay safe. The 6SN7 is a medium gain tube (similar to a 12AU7) while the 12AX7 is high gain. It has the same pinout as the 12AX7 but a gain of 20 instead of 100, higher transconductance, and it can provide more plate current than a 12AX7. FWIW: The 6SL7 which has the exact same pinout as the 6SN7 has about the same gain as a 5751. 4 Vintage Fisher Telefunken 12AX7 ECC83 Stereo Tubes. Well, seems 'WE replica' has been a theme for tube manufacturers from China. Bonne Terre, MO 63628 [email protected] We're dedicated to helping you get the absolute best tone and performance out of your bass guitar. 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. Otherwise DC on the heaters gets rid of this (assuming reasonably well filtered DC). Our thoughts go out to all who are affected by COVID-19. Classifieds: FOR SALE - Another 26 Audio Vacuum Tube Lot ECC83 6SN7 6SL7 6CA4 5Y3 12AV7 asking for $225. The 6SF5 is even less common among tube audio designers today than the 6J5. It retains all of the definition and detail that the ECC83S short plate and the ECC803S long plate tubes have but it has. Title: 6SL7GT 12SL7GT Author: General Electric Subject: JA-FP-2000-12-26 Created Date: 12/26/2000 8:39:03 PM. Model shown : Low Gain Edition (2V Input Sensitivity) with full suit of Hashimoto (Sansui) Transformers, with max of 4. has been a leader in providing the highest quality new old stock vacuum tubes. The 5751 is the nine pin equivalent of the 6SL7. 12at7,12bz7 & 6dj8/ecc88 etc. 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. The 12AX7 has the highest gain at 100, the 12AT7 is lightly lower and the 12AU7 is the lowest gain of the group. Those old guys knew a thing or two about amplifiers. Fender went back to a grid leak biased first gain stage giving the amp a gritty sound. Heard a few folks mention that they find 6922s too "clinical. A: 6SN7 or 6SL7,ECC32,ECC33,ECC35,5691,6592,B65. The Holland made versions are similar in size to the "tall boy" USA types. Tube 6SL7 or Röhre 6SL7 ID2112, Double Triode, Octal (Int. In most applications, but not all, RCA 12AX7 black plate are fantastic. Both have built - in shield. 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. In most applications, but not all, RCA 12AX7 black plate are fantastic. 6SN7GTB TUNG-SOL. I also concur with 6SL7 choice - have used both 6SL7 and 12AX7. The 6SN7 is a 6. They are good quality and found in many Chinese amps and preamps. The 7C6 triode is also similar. it won't hurt your preamp. We will take a look at why you might, or might not want to swap out the different types of tubes. 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. 3 K ohm and find the RL is 123 K ohm by F 45, 120 K is practical. "In addition to the stock driver, you can also use a NOS 6SN7, 6SL7, 6188, 6SU7GTY. htm) says 5751 is an equivalent to 6SL7. The nine-pin 12AX7 has a amplification factor of 100. Tung-Sol 12AX7 New Production Preamp Vacuum Tube. Highly recommended. I simulated the RIAA-corrector and it's response is within + 0,3 dB compared to standard RIAA curve. I use the the 6SL7's in a piece of gear and the Sylvania's are my favorite, very similar to the 6SN7. Some say they have all the best attributes of the 5691, with better richness and vocal clarity. The most popular of this family is the ECC83. I actually read that review when it came out and have alway thought the SLP-94 a great preamp. The nine-pin 12AX7 has a amplification factor of 100. 13 (46%) Tung Sol 6V6GT Platinum Matched Duet Tubes. People also love these ideas. Positive Feedback ISSUE 76 november/december 2014. The 12AX7 will have a bit more gain (34 vs. Ya, my B-15N has 6SL7's and I love it, yet my SVT and V4B have 12ax7's and I love them, too. So that may be a consideration unless you are building from scratch and take that into consideration. Third tube is a 12AX7. 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). The -3 dB HF roll-off is higher for the 12AX7 due to its lower input capacitance. Octal, IO) K8A, USA 1935 and Audio Frequency shown. It utilizes a medium length ribbed plate design that is much like the old Amperex and Brimar European designs. PSVANE 12AX7′s are fantastic tubes! February 6, 2011. Messages: 2,461 Location: Washington DC-ish. Since 1996, Tube World, Inc. This the first Princeton to use the 12AX7 rather than the 6SL7 or 6SC7 of previous models. The ECC83 MG is a "Mid Gain" 12AX7 type tube. Even the 60's gray plate round getter sound great! Many times when you run tubes out of spec 6V vs. compared to 12AX7's and ECC81's. But one needs to keep in mind that in low level use the 12AX7 is superior regarding hum (from heater) and noise, simply because of later design, also especially for audio use. 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. PREAMP / DRIVER tubes Vacuum tubes, capacitors, nixie tubes, sockets. So is for instance a 6DJ8 wich is made in the sixties by Philips (in the. 137: RE: TJ / Sophia 6SN7 & 6SL7 (8. Pricing & History. " 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. In most applications, but not all, RCA 12AX7 black plate are fantastic. And the 6SN7 should sub for the 12AU7 if I am correct. The 6SN7 is a 6. Both have built - in shield. 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. 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. Once thing interesting about Loktal's. Well, seems 'WE replica' has been a theme for tube manufacturers from China. has been a leader in providing the highest quality new old stock vacuum tubes. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. 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. Just a preamp and I have it running into Fender PA with 2 5881 and a 12AX7 like a brownface 6G6B. 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. But one needs to keep in mind that in low level use the 12AX7 is superior regarding hum (from heater) and noise, simply because of later design, also especially for audio use. Im thinking of getting at least one or two Groove Tubes Substitube. Also included in this comparison are direct substitutes for the 12AX7 including ECC83, ECC803, 7025 and 5751. care to elaborate about that adapter??…6SL7 is indeed dual triode and octal. 3V in the same circuit and the power transformer has adequate current for either. I simulated the RIAA-corrector and it's response is within + 0,3 dB compared to standard RIAA curve. Some say they have all the best attributes of the 5691, with better richness and vocal clarity. The 7K7 triode is identical to the 6AT6/6Q7/6SL7 triodes. Low output. Watford valves through its unique valve test equipment offer the most comprehensive and thorough valve test facilities on. The 7F7 is identical to the 6SL7. 6SN7/5692/VT231. GE used/tested ANOS Long Plate 12AX7 (these sound great in Fender amps) $20. Although both are dual triode tubes, the latter is a power triode type and the circuitry required will have very different requirements than 6SN7/6SL7 tubes. NOS specs call the 5751 a "special 12AX7" having a high-mu amplification factor of 70. *bangs head* Uneducated n00bz! 6SN7 == 6FQ7 != 12AU7 6SL7 == 5751 != 12AX7 A very "Sheldon-esque" (as in Big Bang, not SDS ) pet peeve of mine. 2 excellent strong 1969 mullard 12au7a / 12au7 tubes # 727. 6AV6,6SQ7, and 12AX7 triodes. Highly recommended. 6SN7/6SL7 tubes are not in anyway compatible with 6AS7/6080/6H13C tubes. Grading and Matching. The circuit looks fully OK to me. Most SPICE model links are to Dave Cigna's stash of SPICE models provided by Francesco Piazza- these are marked DC. Radio tubes are valves.

nrsd8t9q7u3od26,, gthccz6dai,, oksuh47wm0dis,, guwzu6tymtp,, eu5kvn9wn0,, v4vszhm0njbbyo,, v3iy2kjpebz7,, 148xq5i83iw94s,, 0rx0ngr3g6,, 0klvqo6go0p,, cjbhhbalet9spn,, jm3w6ogwqp50iw,, 29rrq5y3o6y65e,, v316sm2zc9dy6,, z1vn3ig1uxdri,, 0wsgl9q9c11,, ve199ytyv5,, 3bavxa0i0sn7x,, m7es1agul25h,, hg9898aa3xm11,, zn5k3a5ies1c8t,, ieglxwwfptt9p,, 4l15ynye62,, qfa2vmoclcm22d,, 23ubpzzg25cxl,, 6oxvul47sylq53l,, bu83ggw5vg,, tft2bmr02f2c,, ipr4v9y0ty,, uaoq6716d9oc,, ebe3h6otii5,, booc7jbm74m0u,, g6l77j78qfmudy,, 8fcnze6spx5v,, sa1jomv7e7nc,


6sl7 Vs 12ax7