7591 vs 6l6

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5. These are a little brighter and more detailed than the smooth plate and work perfectly as the phase inverter in Dumble style amplifiers or when you are needing a little more crisp clarity from a 12ax7. Jun 30, 2020 at 8:46 PM #23. 6l6 - 6lq6. 7199. nl 6L6 (metal envelope) and 6L6-G (shouldered glass envelope) were used in pre-World War II radios and Public Address amplifiers. 7591 Tubes. 6mh6 - 6mj6. 6L6GC / KT66 / 5881 tubes. tubes including 6L6, EL34, 6V6, 7027, 6550 and 7591. Being the previous owner of a McIntosh MC-225 amp, I am very familiar with JJ and EH 7591 tube offerings. The 1614 and 1622 are premium versions of the 6L6 that are rated for maximum output and longer life. 7591, 6L6 2A3, EL34. announces its newest line of products: the Yellow Jacket Converters. 6V6 S is a beam power pentode with octal base and a maximum plate dissipation of 14W. 6L6 / 5881 Tube Catalog Page May 18, 2007 · I am a bit of an amp addict and have 18, most from the mid 60s to the early 70s. WESTY. 5 volts) than the traditional EL34 vacuum tube. Your amp tech, (if you can find one) will check the anode currents of  3 Apr 2018 In 1936, RCA developed the 6L6 beam power tube shown in Photo 1, The 7591 and the 7868 are almost identical power pentodes in that  The impedance of these tubes more closely matches a 6L6GC and is higher This tube will out perform most all original 7591's and is a drop in replacement. 9A vs 0. The 6GM5 and 7868 are essentially the same tube but they do have different pin-outs so they would require an adapter to be ran in place of the 7591. Specifications, pictures, technical information. En montage audio en push-pull, le tube 7591 est capable de délivrer une puissance respectable avec une fidélité remarquable. Most Yellow Jackets® provide a substantial output power reduction and a “self-bias” Class A configuration for the EL84 so that no bias adjustment is required. I don't consider this tube as a 7581A but as a 6L6GC since it dissipates a Pmax of 30W. Yellow Jackets® tube converters allow EL84 power tubes to be used in place of the most common guitar amp power tubes, including 6L6, EL34, 6V6, 7027, 6550, and 7591. Why are there three different types and what are the differences? Also covering the LPS 6l6 / 5881 / kt66 6L6's are beam power tetrodes that can be characterized as having a bold, bigger rounder sound - with crystal highs, warm mids, and bass controlled lows. Yellow Jackets are a type of specialized adapters which permit the use of EL84/6BQ5 power tubes in place of 6V6, 6L6, EL34 and 7591 types. Running a pair of these big bottles in a cathode-bias, Class-A configuration results in the very loud 35 watt power section of the original tube-rectified Supro Thunderbolt. The first Marshall, the JTM45, used a push-pull power stage identical to the Fender Bassman 5F6-A. Most have original box. 3 YJC p. Lastly, is the Jetta capable of running older or NOS 7591’s if I wanted to change them out at some point? Tubes are 6l6's, 2 12 ax7's. How you operate the tubes (push-pull, push-pull parallel, ultra-linear, class, B+, bias, operating points, etc. Il est en outre conçu pour apporter le moins de distorsions possible à l'étage déphaseur qui précède ; non seulement sa Rg1max peut aller, en polarisation automatique, jusqu'à 1MΩ, mais aussi la tension entre le filament et la cathode qui peut aller jusqu'à Further research by Mullard UK for the EL34/6CA7 and EL84/6BQ5, GEC/MOV Valve Co. All we need to do is determine the turns ratio of the transformer, and with that information we can calculate what impedance will be reflected back to the primary with a given load on the secondary. The 6N3C / 6P3S is the Russian equivalent of the 6L6GB and 5881. ★★送料無料★★ 親切な真空管ヘルプデスク 無料相談 0120·194·380 プレミアムクラス 最高グレード 極上の真空管サウンドを求める方にお薦め·全数検査、210日間保証、72時間エージング 商品について ·新品 現行真空管 完動品。 ★★送料無料★★ 親切な真空管ヘルプデスク 無料相談 0120·194·380 プレミアムクラス 最高グレード 極上の真空管サウンドを求める方にお薦め·全数検査、210日間保証、72時間エージング 商品について ·新品 現行真空管 完動品。 ★★送料無料★★ 親切な真空管ヘルプデスク 無料相談 0120·194·380 プレミアムクラス 最高グレード 極上の真空管サウンドを求める方にお薦め·全数検査、210日間保証、72時間エージング 商品について ·新品 現行真空管 完動品。 Equivalent and similar tubes with different bases. 1 NEW PUSH-PULL TUBE AMPLIFIERS MENNO VAN DER VEEN, AES member it. The beam tetrode design of the 6L6 allowed RCA to circumvent Philips' pentode patent. 6L6 Tubes are the Classic American high-power valve. call / email: 7591 Westinghouse Also, not all 6L6 tubes are equal. u. Quick change from 7591 to 6L6-GC or Russian 5881 (Scott and Fisher amplifiers) On these amps the cathodes of the 7591A's are usually tied together. Some tubes require more bias voltage ( 6L6 and 6550 for example), while others require less (6BQ5, 7591). 8 (7591) per tube. V2. Some Refurbished / Restored & tested w/ 90 day warranty. They have the same plate/screen ratings as the 6L6G/GA/GB. I dont know much about the current 7591's but some years ago Sovtek was making them but they were just 6L6's with a repin. Measured Power in audio amplifiers. Most Yellow Jackets ® provide a substantial output power reduction and a "self-bias" Class A configuration for the EL84 so that no bias adjustment is required. The lows are deep, big and round. 5 vdc) bias, which drives a quality NOS 7591 to approx 35-40ma plate current, plate dissipation approx 8 watts. I have a 68 Ampeg The 7581A does not use the familiar plate stamping that you see in the Tungsol 6L6GC, 7581 and Kt66. ) will change optimum plate to plate load impedance. Used in later versions of equipment that used 7591 The 12BH7 is a medium gain dual triode used in hi-fi amplifiers, pro audio equipment and some guitar amplifier circuits. The mids are very harmonically rich and natural while the highs are thick, creamy and very detailed. 99 Store. 5u4 ampeg r-12 2x 6sl7, 2x 6v6, 5y3 ampeg r-12a 2x 6sl7 , 2x 7591, 5y3 ampeg r-12r 6sl7, 2x 6sn7, 6sl7,2x 6v6, 5y3 ampeg r-12rb 6sl7, 2x 6sn7, 6sl7, 2x 7591 ampeg r-15r 6sl7, 6sn7,7025,6sl7 The NOS Telefunken Long Plate 12AX7 (Ribbed Plate) <> Bottom are $224. To view this site, you must enable JavaScript or upgrade to a JavaScript-capable browser. Apr 10, 2016 · Best Tube comparison of tubes EL34 vs 6L6 on a Laney GH100L Basic mixing with no EQ and effects, just guitar power. Sep 29, 2010 · The amp should take 6L6 without problems, heater current is 0. Some amplifiers have a balance control between the cathodes, this must be disconnected. 5881 vs 6L6GC Valve/Tube. About as loud as a Princeton Reverb. A fifth socket tests for shorts. 7591 and 7868 have the same internals, and electrically they are the same. F. Notes: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. ) substitutes vt - tubes _ european tubes european lettered tubes a thru z plus european to american substitutes (including european ISO transformers made by the employees who made the TANGO transformers. The "Help,My Amp has 7027's!" FAQ:What to do, and why you shouldn't panic. any sugges These tubes, like many late-generation power tubes, have comparitively large cathodes (as compared, let us say, to a 6V6, a 6L6, or even a 7027A). If you rather stick to NOS tubes, the 7591's are a lot more easily available and almost identical electrically. If it drops from 6. New old stock, original Box and whitebox. One obvious difference is the 7591 vs 6L6 and I think the rectifiers are different. The prices seem quite extraordinary for the 1950’s, and even today I can’t imagine how long it took a repairman to save that kind of money. $47. Cleveland Guitars 02-27-2010, 06:16 AM #3 Checking An Unknown Output Transformer We can now use this knowledge to determine the impedance of any unknown output transformer. 3-1/8" mounting centers. "It (the 6L6) is a glorified PA tube at best. This allowed a peak transient plate rating of 5000 volts which is helpful when the 6L6 is used as a horizontal sweep tube. It is a high output audio power tube that is flexible and easy to design with. Joined Mar 31, 2008 · 2,071 Posts . Microphone is a Shure SM57 of course! TubeDepot carries a selection of 7591A / 7868 Compatible Power Vacuum Tubes. 12 AXT. We design and manufacture our tubes, engineered for demanding high fidelity, reliability and overall warmth. 14 DCBirdMan 2 years ago Grew up 2 towns away from where Ampegs were made in the 60s. 6L6GC JJ Electronics Power Tubes. 5 : MS-160. I am often asked this question, but usually after the purchase of the wrong tester! I will provide some help with this article and limit the techno-babble as much as I can. com. 25″ x . BEAM PENTODE 6L6GC is a beam power pentode with an octal base and power of 30W for use in 6L6 amplifiers. Maybe a 7591 or a 6L6GC. to the 7591 but is enhanced with large cooling fins, a larger 6L6 size bottle and thick mica's top and   A. Then go to direct biasing instead of cathode biasing - it will give You an even higher potential difference across the tube. Elektronky - vacuum tubes. (The Dareds had more immediacy, but the 6bg6 sounded sweeter). which were made in the Westinghouse Factory. buro Vanderveen, The Netherlands fax: xx3l-38-4533-178, e-mail. Note that the newElectro-Harmonix 7591A is now available,and it does not requireany rewiring to use. Beam power tetrode modeled after the vintage RCA 6L6GC "blackplate". 6K is heavy abuse for 6V6, although some amps do it. . SE 6L6, 5881 Tube Stereo Amplifier Schematic (6SJ7 input) - [8 Watts, SE, class-A, Pentode] - (Project) The 7591 is a great tube with a unique sound and character. If your tube isn't listed then pick one with the same Max Dissipation Rate which is shown to the right in the tube list. Can you elaborate? i. Jun 29, 2018 · Gear Talk - Power Tube Comparison El34 vs El84 vs 6V6 vs 6L6 vs 6550 vs KT88 (Reussenzehn) - Duration: 26:13. I think the 7591 was used because, at the time, it was cheap; things change and I'd re-tube it. The Tung-Sol 7591A is considered by many to be the finest 7591 ever made. Spec said will be get 10W rms with Tolex is the most common covering found on the outside of guitar amplifiers and speaker cabinets. After almost 80 years, more powerful and improved versions are being produced by factories in Slovakia, Russia and China. Title: 6L6GC Author: RCA Subject: FP-2012-01-07 Created Date: 1/8/2012 12:17:39 AM Sep 29, 2010 · The amp should take 6L6 without problems, heater current is 0. d = Diode Unit. 3 YJ20 p. The ad above is from the January 1953 issue of Radio-Electronics. 0 Nov 29, 2007 · If you don't want to mod the amp, EH currently makes a 7868 that's not too pricey. 5% impedance. The 6V6 sound can be described as warm, and bluesy. com Maybe the russion EL84 equivalent which can take 20% mor current than the EL84. The 6CA7 and EL34 tubes sound distinctively different. They are as close as posable to the NOS Tung-sol 7591. I would install 6L6. 400V into 6. パワー管: 2a3: 300b: 6bm8: 6l6/5881/kt66: 6v6: 7027: 7591: el84/6bq5: el34/6ca7/kt77: kt88/6550/kt90: プリ管: 12at7/ecc81: 12au7/ecc82: 12ax7/ecc83 no. Oct 27, 2004 · Re: 6L6GC vs. Sovtek 7591-XYZ's do NOT put out "twice the power of 7591" as BizzyBee advertises (in fact, rewiring for Philips 6L6WGB's, which are a better fit anyway, will . With the very large number of vacuum tubes or thermionic valves that were produced and as a result of the multiple vacuum tube numbering systems that were in use, there are generally equivalents for most types of tube. 187: Sylvania 5881 vs TungSol JAN-CTL 6L6WGB (3. 1. It uses 7591 output tubes in push pull for 33wpc, so similar in power to the 100 you are looking at. hp = Heptode Unit. 7591 除了器材少,老管數量也少,不太好找。 (至於 7581 = KT66,是 6L6 家族,和 7591 無關,請別搞錯) 較常見的老管可分兩種 : Qualified orders over $99 will ship to you without incurring a shipping fee. IOEN. We specialize in New (NOS) & used USA Vintage vacuum tubes. s. This list was expanded from a list here (thanks to Jim Cross!). Consequently, 7591 and its siblings were used in a vast number of home audio equipment in the 1960s. Manufacturing cost, profit margins, market share and sales revenue were each in their own right, powerful design engineering drivers and inhibitors. Our observations: This tube is a work of art! And it sounds as good as it looks. You will know if the heater current on the 34's is too high by measuring the fil voltage. RCA DID NOT Manufacture any 7591's. 2. 2 TOK. 6L6 evolved from its original form from higher powered 6L6GB to bigger higher powered 6L6GC type through many years. now im not really sure if i should go for the JJ 6L6GCs or the TAD 6L6GC-STRs. €13,31 2 – 6L6 2 – 12AX7 2 – 12AT7/6201 (NOS) 1 – 5AR4 rectifier: Pre & Post Volume, Treble, Mid, Bass, Dwell, Mix: Master Volume (“Post” Volume) N/A: Reverb: N/A: Head 1×12 2×10: Ken Fischer designed transformer: 4/8/16 Ohm: JETTA: 30 Watts: 2 – 7591 2 – 12AX7 1 – 5AR4 rectifier: Volume, Tone, Master: Post Phase Inverter Master 3: 7591 vs 7868 (10. €13,31 Mar 23, 2008 · 6l6 6j7 6f6 6l6 12sc7 2c21 12l8 6ac7 6134 6ab7 2051 2050 128a ck1003 5591 9001 9003 5590 53 6aj5 6ak5 ef95 2c51 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 The JJ 7591-S is a high quality option for both guitar and home audio amps. The 7591 and the 7868 are almost identical power pentodes in that they have 550-V maximum plate voltages and 19-W plate dissipation limits. 71a - 99. 4. We also offer high quality and hard to find parts for DIY tube amplifier projects. Each is tested and guaranteed. The most common types of 6L6 tubes and their European equivalents used today include: 6L6GC - The popular 6L6 beam- power  The Ruby 6L6GC-MSTR is from the Shuguang factory. Adapters are available for almost any type of output tube, including 7591, 811 and 885. 50 for a quad. JJ Electronic - Vacuum tubes, Capacitors, Amplifiers. g the “Fender Chime”), while still allowing plenty If your amp comes with one of the common octal power-tube types (6L6, EL34, 6V6, 6550, 7027, or 7591), these converters allow you to plug cathode-biased EL84s in their place without bias adjustment. When in doubt, you can always use a 6l6GC if an amplifier calls for any of the 6L6 types because the GC can handle the highest voltage. 2 YJSHORT p. 184. Z’s new Jetta amp and the story behind the 7591 power tube Welcome to Watford Valves. 6SN7 Preamp Vacuum Tube. It's loaded with warm tone and is physically very similar to NOS 7591 tubes so installation is a breeze. 4 YJUNI p. SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. 3 to 6 or less they are too much Best sounding 6L6 ever made replacing all 6L6/5881 tubes in all applications. Only the triode version will provide a power reduction. " Interesting commentary. 51 - 57tx99. TUBE CROSS REFERENCE BASICS There have been a myriad of tubes types and styles made over the years for industrial, military and commercial use. 6L6, 6L6GC. From $40 Characteristics Svetlana Outline drawing T SVETLANA TECHNICAL DATA EL34/6CA7 High Performance Audio Power Pentode he Svetlana™ EL34 is a glass envelope power pentode having a plate dissipation rating Aug 6, 2019 - Explore Mike Rudinsky's board "Heathkit W-7M" on Pinterest. See more ideas about Valve amplifier, Vacuum tube, Amplifier. Enter values in blue and click any Calculate button. This bottle has a plate very similar to the 7591 but is enhanced with large cooling fins, a larger 6L6 size bottle and thick mica’s top and bottom. What constructional and electrical characteristics of the 6L6 cause it to be suitable for PA service but not for other higher quality audio services as you imply. They can produce same amount of power as the EL34 type. Revisions to the original 6L6, such as glass envelopes and increased power handling, yielded new designations such as 6L6G, 6L6GA, 6L6GB, and finally the 6L6GC (introduced in the late 1950s). 15" Jensen Special Design speaker (220512). 12ax7 ( Type: Vacuum Tube ), ( Brand: SYLVANIA ) Review (mpn: STR387 for sale) STR387 Vacuum Nos SYLVANIA 6L6GC Tested Tube 100% Nib. AWC · Banned. Jul 01, 2020 · New Platinum matched quad (set of four) Tung-Sol 7591A tube. Will work great with 6L6GCs. A power valve with an added screen grid next to the Anode can be described as a Tetrode or Pentode. The JJ 7591-S is a high quality option for both guitar and home audio amps. Why the backstory and what does this have to do with Mesa? The JJ 7591-S is a high quality option for both guitar and home audio amps. You can swap the KT88 output tubes with 6L6, or EL34 / 6CA7. 0: 15: A S/E (triode) 250--20. Most Yellow Jackets® provide a substantial output power reduction and a "self-bias" Class A configuration for the EL84 so that no bias adjustment is required. Hickok tube testers were quite expensive in their day. The 6L6 has plenty of headroom and does not break up nearly as quickly as the EL84 or EL34 tubes. Ge, Sylvania, RCA, Mullard, Zenith, Westinghouse and Emerson. 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. e. It has a lot of headroom and a fat, solid  It is a specialized, current-limiting/voltage-conditioning adapter for use in most 20 to 100 watt amps which use 6L6, EL34, 6550 or 6V6 output tubes. hx = Hexode Unit. 6L6GC. a. Scott in their home audio equipment. Are your four tubes matched? Did you back down the idle current from redline? My RCA tube manuals for 7591A says the grid resistor should be less than 300 K ohms with fixed bias, Fisher 500C and others used a higher value and should be changed, but that can have an effect on the sound, so I've been told. 6L6GC - The standard among 6L6's. 25″ Sep 10, 2014 · Remarks - DIY Single-Ended KT88 / 6L6 / EL34 / 6CA7 Tube Amp. 24) The RCA receiving tube manual RC-30 (1975) lists the same specs for the 7868 as the 7591. KT66? posted by 7591 on October 26, 2004 at 06:04:58: 2-7591 Cath Bias 20W: 1-12", 8 Ohm Jensen C12Q, C12N Jensen EM1201 JBL D-120F: 12A125, 12F125 12A150, 12F150: Ampeg Gemini II 2-6L6 Fixed Bias 30W: 1-15", 8 Ohm 7591 Original Westinghouse. On a sonic scale, the 6CA7 tube is a hybrid between EL34 and 6L6 tube. Many of these use European nomenclature. Lothar's Guitar School 7,757 views. 99 each. Two Yellow Jackets and Two Empty Sockets vs. If you are uncertain that you are experienced enough to work on a live high voltage amp, please take your amp to a professional to get it biased. It was a beautiful sounding 8 wpc in triode. A cross refe It is meant for use in lower power output amps (20W or less) when no power reduction is desired and you would prefer to use the amp's original cathode bias components. Love em all, each has a different Jul 17, 2009 · Before they came back around, I re-biased my Ampeg Gemini guitar amp in order to use the 7591XYZ tube which, I believe, is the same as a 6L6 with the exception of being pinned for a 7591 socket. A free software bundle for high quality audio and video playback. bar1. If the transconductance (measured in micromhos) remains pretty consistent, you should have a good tube. Testing my inventory of USA NOS 7591 / 7591A tubes, a “sensitivity” setting of “42” was an average to get a reading of “100” for the best 7591’s in my inventory (with plate current of 40ma typical. Russian Military grade. Philips later bought Sylvania and made the same tube but called it a 7591 and sold a buttload of them to the military. The $450 Maxi-Matcher contains four tube sockets and can test output tubes, such as the popular 6L6, and 5881, 6V6, 6550, EL34, KT88, EL84 and 7027s. You will need passive (non-amplified) speaker. Aug 29, 2004 (IIRC) a pair of metal-case 6L6 output tubes . We ship world wide. RCA’s first version of this tube was an early ‘octal’ base tube. My Heathkit amp also uses these tubes. Class: Va: Vg2: Vg1: Ia: Ig2: Ra: S: Rk: Zout: Pout: THD: Notes: A S/E: 350: 250-18. Il est en outre conçu pour apporter le moins de distorsions possible à l'étage déphaseur qui précède ; non seulement sa Rg1max peut aller, en polarisation automatique, jusqu'à 1MΩ, mais aussi la tension entre le filament et la cathode qui peut aller jusqu'à Other Jets had, IIRC, 7591 power tubes. Maximum 6L6 / KT-66: Fender Amp Tubes: Tubes We Buy: Links: FAQ: Euro Tube Codes: Telefunken Tube Codes: How to Order: Order Online With PayPal: Ordering Tips: Gift Certificates: Tube Accessories & Books: Tube Shirts: Speaking of Tubes: Free Screensaver: Tube Testers: Our Guarantee: Tube Dampers / Tube Coolers: Radio Station: Old Radios: Two-Year Notes: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. Yes they are true 7591's , they are accompanied with the original Tung-Sol 7591 data sheet for design purposses. In fact, chances are your old Fisher or Scott stereo receiver needs four new 7591A tubes to revive it to its former glorious sound! The Preferred Series 6L6-GC (USD $29. Apr 03, 2018 · The 6L6 is generally associated with the “American Tone,” exemplified by Fender and Mesa Boogie amps. This amp appears to be working amazingly well (as of now) -- click video below to give it a listen . 6L6 Beam Power Tetrode: 6L6: 7AC - RCA (Frank Philipse) 6L6: 7AC - RCA 1947 : 6L6G: 7AC - RFT 1953 (Frank Philipse) 6L6GA: 7AC - RCA : 6L6GB: 7AC - RCA 1957 (Frank 6L6 Vs 6V6 Tubes Combo amps. Related links. The mids are full with a fair amount of harmonic content. 55) Posted by Lee of Omaha on 2012-10-15, 14:25:15 (70. ) All about Tung-Sol Vacuum Tubes. -4010030. 27OK. Currently, I also have this moded Conn 6bg6 amp that needs a repair. 0: 2. €17,28 6L6. This is one of the most popular power tubes on the planet and as such, there are . Yellow Jacket Converters not only rearrange the pin locations of the tubes, but also provide the necessary current limiting on the screens and cathode as well as blocking the Yellow Jackets® tube converters allow EL84 power tubes to be used in place of the most common guitar amp power tubes including 6L6, EL34, 6V6, 7027, 6550 and 7591. 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. Otherwise they are a drop in replacment for the 6L6. In a guitar amp, this makes for a tone that is more substantial. Mar 30, 2018 · I've seen SB-12 that used 7591 (7868 is basically the same tube with a different base). 1612 - 8950. Buy, sell, and trade high end audio and Home Theater equipment. Upscale Audio 2058 Wright Avenue La Verne, California 91750 (909) 931-9686. この回路が、このままで実用になるかは良く分かりませんが、シミュレーション上は、6bq5や6v6のプッシュプル出力段はもちろん、6ca7や6l6-gcでも十分ドライブできそうに見えます。実際の回路では、電源電圧ももっと高くできますし。 2本マッチ 低ゲイン 真空管pg11 jjゴールド 12ax7/ecc83s 2本マッチ 真空管pg11,【在庫目安:お取り寄せ】 epson elplp55 eh-dm30/ dm30s用 交換用ランプ That old favourite, the 6L6, has been upgraded over and over again, even though superior top cap versions (eg 807 and 1614) were available from the outset - albeit at significantly higher cost. This design was used on the power amp stages of the 200, 208, 222C, 296, 299C, and all LK-series kit amps; and the 340(A) receiver. 50 for singles, $79. Greg 6L6 is the designator for a vacuum tube introduced by Radio Corporation of America in July 1936. If you have not been trained to work with high voltage then have an amp technician adjust the amp's bias. Calculate Plate Dissipation In Cathode Biased Output Stage Based On Voltage And Resistance Readings In these calculations, 5% of the cathode current is assumed to be screen current. The EH7591 is close to 4" tall and is approx 1/4 to 3/8" diam larger. Maybe due to the SE operation. But how are the clean and cranked tones? David Lancaster October 9, 2019 at  7591 7591 7199 12AX7 12AX7 606 7 12AX7. Wonder how this amp would stack up to an EL34 once I get it fixed? Checking An Unknown Output Transformer We can now use this knowledge to determine the impedance of any unknown output transformer. 551 - 1000. The JJ 7591 tubes I found on a bit on the bright sound, very romantic and lush sounding, whereas EH tubes had more low frequency impact, but possibly less Sep 09, 2012 · Fisher's 500C use a fixed DC biasing. People often describe 6CA7 sound as heavier and darker than the EL34 tube. Dynamically it smoked the 18 wpc 6L6 Dared monoblocks. Re: Converting 6L6 to 6V6 or 7591 My favorite bands are the Cure, Nirvana, Sonic Youth, Tones on Tail, Siouxsie and the Banshees, and I love new wave, postpunk, and 90s rock. Bias Calculator . My current band recently opened up for Missing Persons, which might be the highest profile gig I'll ever play. Tung-Sol tubes are quite simply the absolute best. Jump to Latest Follow 1 - 9 of 9 Posts. It has fat low end and full mid tones with very good tone separation and a smooth, clean high end. $39. At the time Philips had already developed and patented power pentode designs, which were rapidly replacing power triodes due to their greater efficiency. That means a lot of available cathode coating material to vaporize. Yellow Jackets®Types YJS p. There might be 6V6 or 6L6 versions, I can't remember. Available singly, in matched pairs and quartets. Saturday 9:00 am - 5:00 pm Pacific How to Bias a Tube Amplifier. EL-34 is the same pinout except you have to connect pin 1 and pin 8 for the '34's. 222. However, this is the only similarity between the It is the same as the above TO11C but mounted on its side the short way to prevent transformer coupled hum. New & NOS power tubes from Electro-Harmonix, JJ & other various brands These Reflektor 6L6G / 6N3C / 6P3S are beautiful 6L6 type tubes from the 50’s! They sound awesome and are very sturdy in construction. if EL34 get 8 W ,probably to get 6. Elektronky, lampy, patice a kondenzátory od světoznámeho výrobcu JJ-electronic. Hickok even sold one as an accessory part with it's own part number. パワー管 2a3 300b 6bm8 6l6/5881/kt66 6v6 7027 7591 el84/6bq5 el34/6ca7/kt77 kt88/6550/kt90 プリ管 12at7/ecc81 12au7/ecc82. 6C G7. 4 out of 5 stars 10 $16. The Bold listings are shown as equivalents in a tube manual, and could probably be sustituted without any changes other than rewiring (but check dissipation rating for power tubes!). Vt. In fact, the whole design of the AA-100 turned me off to the project. IOK SW. 7581A refers to an unaviable Sylvania which was a kind of 6L6 dissipating 35W, the only 6L6 that ever delivred such a Pmax. 7591 VS 6L6. 100 - 483. The following should be direct substitutions. 34 - 35. To clarify, I sometimes come across old Fender amps with missing or worn-out 6L6-GC tubes, and was wondering if the old 7027's I have in my parts drawer are a safe substitute (without modification). This nice unit sounded so good, I wanted to listen to it ALL NIGHT! This amp is about 50 years old. How to build Audio Amplifiers From TV Compactrons. Equipment such as Oscilloscopes, Tube Testers / checkers, Audio AF Signal Sine Wave generators, VTVM’s, Triplett 630-PL and Triplett 310 VOM’s, VTM’s, Transistor Testers, Vari-AC’s, Dummy Loads, Power Supplies and more, by B&K Heathkit RCA Eico, Fluke, Micronta, Simpson, Triplett Hickok Manuals Schematics Catalogs. I'm not sure why manufactures today didn't pursue making the KT66 amps these days. 2: 300: 4,200: 11. So, to unravel this, first let’s look at the various types of 6L6 valve. Title: 6L6GC Author: RCA Subject: FP-2012-01-07 Created Date: 1/8/2012 12:17:39 AM The JJ and Tungsol are approx the same size as original Old Stock 7591's, with the TUNG-Sol being about 7/16 or so shorter. Warning: Substitutes are given as a guide only - please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. 20lf6 - 26. Unless bass attenuation is desired, the capacitor needs to be large enough to induce very little signal attenuation at bass frequencies. I had a couple of Gemini's at the time and just modded them to use 6L6. You could run 6L6 self-bias at 24 watt/each dissipation. Very few available at any give time. V ponuce ECC83S, EL34, E34L, EL84, 300B ★★送料無料★★ 親切な真空管ヘルプデスク 無料相談 0120·194·380 プレミアムクラス 最高グレード 極上の真空管サウンドを求める方にお薦め·全数検査、210日間保証、72時間エージング 商品について ·新品 現行真空管 完動品。 Introduction. There are abundant supplies of NOS 6L6 tubes. The REAL only true "STR" tube is a Sylvania 6L6GCSTR, which had a higher voltage and mechanical shock rating than a standard 6L6GC. Electro-Harmonix 7591A - Platinum After having a Bryston 2B with a Hafler 101 preamp and then getting a matching Hafler 100w/ch power amp, the stock ST70 had a sound that blew me away compared to the other components. Thus, they can produce about 40 W when used in a push-pull pair. Pretty easy,just look at the pin-outs on both tubes. I own a B12X which has a 6L6 based power amp (I forget exactly which version of 6L6) and has a single 12" plus a sattelite cabinet with two small speakers for the reverb only signal. The metal 6L6 was the tube of choice for the calibration standard, for many tube tester manufacturers. The 7591 is a power tube with more gain though, so while its power output falls between a traditional 6V6 and a 6L6GC, it has more gain than both so it doesn't need much of a preamp to drive it, and when you do drive it, it tends to be more harmonically rich sounding than either of the other two. Test EL84 6BQ5 EL34 KT88 7591 7591A 6P14 6L6 6CA7 6V6 5881 6550 KT66 KT100 KT120 Vacuum Tube Tester Amplifier Bias mA Version T4 US $39. 6L6 vs EL34 vs 6CA7. Find the wire connecting between the two cathodes and remove it. 6L6 and 25L6 were introduced in 1935 as the first beam tetrodes. Yellow Jackets®are like getting a whole new amp. Tube Data Sheet Locator. Metal 6L6, 6L6G & 6L6GA - Maximum dissipation of 19 watts and are interchangeable. U-305R-(1, 2, 3) -1965 Japanese tube guitar amp. This is tenuous, and I might also get run out of here for saying something so non-specific and unprovable, but I also feel like EL-prefix tubes of Euro manufacture (Mullard, Amperex, Telefunken, Siemens, etc) have a certain aspect to their sound that differs greatly from the American beam-forming tetrodes (6L6, 6V6, 5881, 7591, etc). My comparison of Rated Power vs. I bought a quad of JJ 7591's BEFORE I saw how nasty the output circuit board was in the amp. 7591 Power Vacuum Tube. Nov 07, 2014 · This new Tung-Sol 7591 Vacuum Tube might not sound familiar to today’s audiophile, but if you’re a vintage audio buff you’ll know them well. t = Triode Unit. It was also very powerful sounding too. All Yellow  in place of the most common guitar amp power tubes, including 6L6, EL34, 6V6, 7027, 6550, and 7591. EF86 (also 象印 海外向け炊飯器 5合/220-230V NS-ZLH10,300B JJ 4本マッチ 低パワー 真空管PX21 【送料無料】, 三菱ケミカルメディア DVD−R DHR47JPP10C 100枚 お得な10パックセット | - bungalowmag. 7027/KT66/6L6GCs are the high output tubes in the 6L6 family. A. 3’ down to ‘5’. It is robust and available in a wide variety of textures and colors. Here's how to convert Quicksilver and otheramplifiers from 8417 to 6550/KT88/KT90. * Note that some early model numbers are a guess as Hickok produced many early items that had no model number on unit or produced many variations without changing model numbers. Both types were branded with the L6 ending to signify their (then) uniqueness among audio output tubes. 6L6 Power Vacuum Tube. contact us 4 Pinehurst Lane Minesing, Ontario L0L 1Y2 705-737-6773 (tel) 705-737-6774 (fax) email us here I have used a 6k6 in a champ before and it tends to act more like a 6l6 is terms of sound and distortion but in the same size as a 6v6. 6 Jan 2011 It basically allows me to replace the 7591 tubes with EL84s to get some of that dark Fender Concert II EL84 vs 6L6's THD Yellow Jackets. Screen resistors (470 Ohm) are a good idea also IMO. 3 amps per tube more heater current than a 6L6, so be sure your amp can supply it safely before you plug them in. It's thicker glass envelope and sturdy construction is designed to work in the most demanding  EZG-50, 50 Watt, 2 – 6L6 2 – 12AX7 2 – 12AT7/6201 (NOS) 1 – 5AR4 rectifier JETTA, 30 Watts, 2 – 7591 2 – 12AX7 1 – 5AR4 rectifier, Volume, Tone, Master  They were all badly worn and I guess I should have expected this. With 22 tubes it eats 200 watts just sitting there idling. ampeg j-12d 2x 6bk11, 2x 7591 ampeg j-12r 12ax7, 6u10,12ax7,2x 7591, ampeg m-12 3x 6sl7,2x 6l6 ampeg m-12a 3x 6sl7, 2x 7591, 5y3 ampeg m-1? 3x 6sl7, 2x 6l6. The cheap way out would be replace the tubes with 6V6's (or 6L6's if they fit). I have on hand a pair of 6CA7 and 7591. BTW, a 7591 tubes will take a lot of power, but an Ampeg RRII with two of them is still not a loud amp. be care full to use screen grid voltages. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. Quick fixes for 7591A amps. TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar players, DIY tube audio enthusiasts, and audiophiles. Could be different brand names like Philco, RCA, etc. These are found in Ampeg, McIntosh and Fisher amplifiers (among others). Example companies using 7591’s are Fisher and H. Biasing an amp requires some knowledge of tube amp circuits and experience with high voltage. BEST ANSWER: You can plug you laptop to this Tube amplifier. Early on it was primarily used in radio sets, with a metal envelope to prevent breakage. No they are NOT 6L6 / 5881 spec you can not exchange them/ swap them. May 20, 2010 · 6V6 6L6 7591 KT66 were and are lower power octal based power valves that pre-date the 6CA7, KT88 and 6550. Jan 05, 2010 · A Fender amp with 6L6 tubes is widely considered to be the “gold standard” by which we judge clean guitar tone. You DO need to change the bias significantly. May be shipped in white generic box due to box deterioration. 0: 54. Can also use 6L6 family tubes. Quick change from 7591 to 6L6-GC or Russian 5881 (Scott and Fisher amplifiers). I use (-2. Like the 6L6 and 6550, 6CA7 tube has a more pronounced low end. The new 7591 tube from Tung Sol is the third new production 7591 that I have tested. Mar 25, 2008 · i am going to change the powertubes on my Diezel VH4S and decided to put 6L6s in it (at this time the amp runs with JJ 6L6s - but theyre old and have to be replaced, so i dont know how new ones would sound). VS. Subsequent Marshall designs used EL34 pentodes instead of Fender's 6L6 beam power tetrodes to create an entirely new sound for which these amps have become legendary. This allows you to get more power-tube distortion at lower overall acoustic volumes, as well as give your amp some of that famous British EL84 flavor. WARNING: A tube amplifier chassis contains lethal high voltage--sometimes over 700 volts AC and 500 volts DC. V1: JJ ECC83S, V2: JJ ECC83S, V3-4: Tung Sol 7591 (matched pair), V5: Sovtek 5AR4 Recommended Bias Point: Cathode Biased (no re-biasing necessary) Fuse Value: 2A 250V SLO 1. 5u4 ampeg r-12 2x 6sl7, 2x 6v6, 5y3 ampeg r-12a 2x 6sl7 , 2x 7591, 5y3 ampeg r-12r 6sl7, 2x 6sn7, 6sl7,2x 6v6, 5y3 ampeg r-12rb 6sl7, 2x 6sn7, 6sl7, 2x 7591 ampeg r-15r 6sl7, 6sn7,7025,6sl7 What does this calculator do? The coupling capacitor CG blocks the high DC voltage at the plate of the driving tube while allowing audio signals to pass. Love em all, each has a different Jul 24, 2016 · 6L6, 5881, KT66, 7027 - beam power pentode. Shop a variety of vacuum tubes: preamp, power amp, rectifier tubes. 4 Jul 24, 2016 · 6L6, 5881, KT66, 7027 - beam power pentode. 9-pin magnoval base version of 7591. please see Duncan amp each other. NEW (NOS) Westinghouse was the originator of this tube. Used & Vintage electronic test equipment for sale. You'll end up at about 6. Watford Valves is a U. 6L6 Power Tubes; 6V6 Power Tubes; 7027 Power Tubes; 7581 Power Tubes; 7591 Power Tubes; 7868 Power Tubes; EL34 Power Tubes; EL84 Power Tubes; KT120 Power Tubes; KT150 THD Electronics, Ltd. By Rob Robinette. Vacuum tubes help create a perfect tone. I have EL34, EL84, 6l6, 6550, 7591 powered amps. 5 The Epiphone serial number decoder currently supports 12 serial number formats from 25 factories. Known to be a very powerful 6V6 due to its robust construction. They bought them from Westinghouse and Sylvania (more common). 0: 40 - 44 Jul 30, 2004 · Tube Interchangability Reference. 11 - 12hg7. Power-wise, the 7591 and 7868 are in the middle of the 6V6 and 6L6GC, with a pair of 7591's making 44 watts RMS with 450v plate and 400 screen fixed bias in the RCA manual. This amp sounds sweet ! Check out ampeg j-12d 2x 6bk11, 2x 7591 ampeg j-12r 12ax7, 6u10,12ax7,2x 7591, ampeg m-12 3x 6sl7,2x 6l6 ampeg m-12a 3x 6sl7, 2x 7591, 5y3 ampeg m-1? 3x 6sl7, 2x 6l6. YJ7591 The YJ7591 is for amplifiers that use 7591 power tubes. p = Pentode Unit. Generating less power than other power tubes, 6V6's generally distort earlier. JJ 6L6GC - Platinum Matched Item 7591 JJ PL. 50/pair, or $159. 1,8Kg : Push-Pull output transformers Type 6L6, 6V6, 6B4G VT52 stereo PP. Sox ок. GA-77RVT Vanguard: 4-6EU7, 12AU7, 7199, 2-6L6 GA-30RVT Invader: 4-6EU7, 12AU7, 2-7591, 5AR4 (most likely corresponding to Epiphone EA-12RVT Futura) Tubes are 6l6's, 2 12 ax7's. thetubestore. 5 W without drawing more power from the supply and can reach up up to 9 W with the 6L6. 1 949Norm 3 years ago I've read the JJ 6V6 is not a true 6V6's, it's based on the old 7591 tube which is like a super hot rod 6V6 6L6 Metal Tube Tester Calibration Tube, Various USA brands, military and standard metal types. It is a newer, revised version of the TAD 6L6 GC-STR (I reviewed the WGC, a slightly different tube). 37:38 Tweed Princeton with a choke vs a resistor 44:18 Speaker cable vs guitar cable (and a sad bird tale) 53:46 Skip’s soup tips 56:43 The story behind the TAVA intro music 57:44 Sal Trentino and a Standel 80L15 schematic 1:05:22 Asking boutique makers for their schematics 1:10:37 Dr. for the KT88, GE USA for the 6550, and RCA for the 6973 (6CZ5 hi-fi), 7027A (6L6GC), 7591, 7868 (6L6 family), also recommends 43% turns (or 43% of plate signal voltage), or 18. At that time I paid $35 for the ST70 with all original 7591 EICO's ,a mullard 5AR4 and mullard 12ax7's and 7247's. Came in original box bought 1o years ago from guitar store box was marked Jan 6l6wgb with str 387 hand written box not in photo will come in action tested Hickok 600 and I 177 b testers 100% special guitar tube never used as had no mate. How do they work?They give you simple Class-A operation from any amp. The Preferred Series is intended to improve on the TAD GC. The screen is always kept at a high +V. They also have relatively tight grid spacing, in an attempt to pack a lot of tube into a small bottle. I fully restored it about 10 years ago by re building the power supply and changing out the tired electrolytic capacitors. For enthusiasts, hobbyists, and casual listeners. Given below is the tube amp bias calculator to find the bias in ampere or milliampere (mA or A). Tube Bias Calculator Instructions & Help. The 6L6 variants were used for many guitar and organ amps. EH7591's are not recommended for a small tight chassis. May 18, 2007 · I am a bit of an amp addict and have 18, most from the mid 60s to the early 70s. Select the Tube Type from the scrolling list. Here's instructions for convertingamplifiers using 7591,to 6L6/5881. Bandmaster 5C7, 5D7 tweed 0001 to 0800 - 1953 5000 to 5500 - 1954 Bandmaster 5E7 tweed S00001 to S00350 - 1955 S00350 to S01200 - 1956 … RCA 1941 AN-110 Instantaneous Plate-Voltage Capability of RCA-6L6 - Since late 1939, the metal 6L6 was made with a "glass button" seal (as opposed to the older fernico eyelets). America's Largest FREE Audio/Hifi and Home Theater classifieds site. 5 W rms when use 6L6 family. As an example, for a 6L6 you would hold the ‘Test’ button down with one hand, and with the other hand rotate the filament voltage switch from ‘6. Electro-Harmonix 6L6 - Platinum Matched Item 6L6EHPL. As a result, it is found in many home audio products during the 1960’s. 7591 tube was originally introduced in 1959. Amp Tubes: 6L6 Vs. ★★送料無料★★ 親切な真空管ヘルプデスク 無料相談 0120·194·380 プレミアムクラス 最高グレード 極上の真空管サウンドを求める方にお薦め·全数検査、210日間保証、72時間エージング 商品について ·新品 現行真空管 完動品。 ★★送料無料★★ 親切な真空管ヘルプデスク 無料相談 0120·194·380 ハイエンドクラス クオリティとプライスとのバランスが良くお薦め·全数検査、150日間保証、48時間エージング 商品について ·新品 現行真空管 完動品。 Cheaptubeaudio has had a long history of advocating reasonably priced but excellent tube gears, particularly Singled-Ended Triodes. 7868 Power Vacuum Tube. In general, a very balanced tone. Items 1 - 40 of 147 Shop our large selection of 6L6 & equivalent vacuum tubes. It is the same physical size as my TO22 transformer The Matcher II is a compact precision measurement station for the test bench or sales counter. 6SN7 Gold Pin Preamp Vacuum Tube. 4 inputs normal and bright for each channel, each channel has volume and tone and there are speed and intensity controls for the tremolo. Discussion Starter • #1 • Sep 17, 2008. 60/EACH. 6L6 This is the metal jacketed version of the 6L6 tube. The heater current difference, bah. SE 6L6, 5881 Tube Stereo Amplifier Schematic (6SJ7 input) - [8 Watts, SE, class-A, Pentode] - (Project) 6L6 Cathode-Bias Class-A Power. But how are the clean and cranked tones? David Lancaster October 9, 2019 at 2:28 pm - Reply Svetlana 6L6: This is now another sovtek tube that falls short of the original Svetlana in all respects. 6L6GB, 6L6WGB, 5881 - Maximum dissipation of 23/26 watts and are interchangeable. ANOS Genelex/GEC KT66 Yellow Jackets ® tube converters allow EL84 power tubes to be used in place of the most common guitar amp power tubes, including 6L6, EL34, 6V6, 7027, 6550, and 7591. 94x83x85. mennovdv@noord. How is the KT66 or 7591 more suitable for these other services than the 6L6. 320V-280V-0-70V-280V-320V/0,16A AC (160mA This tube is a hit! Do be aware they draw about . Genalex Gold Lion KT-77 reissues! The 208 Basic Stereo Power Amp is typical of the HHS 1st-generation "Split-loaders," with 6U8 phase inverters and 7591 push-pull outputs. Yellow Jacket Converters are a type of specialized adapter which permit the use of EL84/6BQ5 power tubes in place of 6V6, 6L6, EL34, and 7591 types. Modeled after the Phillips STR power tube of the 50s and 60s. My second page is called Other Topics Concerning High Fidelity. 6L6 tubes tend to put out a much brighter tone with more top-end sparkle (e. The station tests power tubes for short circuits, heater operation and the electrical characteristics of Plate Current (Ip) and Transconductance (Gm). 26:13. V. Oct 14, 2019 · One obvious difference is the 7591 vs 6L6 and I think the rectifiers are different. 90 / piece Free Shipping | 5 Yellow Jackets® tube converters allow EL84 power tubes to be used in place of the most common guitar amp power tubes, including 6L6, EL34, 6V6, 7027, 6550, and 7591. $46. ★★送料無料★★ 親切な真空管ヘルプデスク 無料相談 0120·194·380 プレミアムクラス 最高グレード 極上の真空管サウンドを求める方にお薦め·全数検査、210日間保証、72時間エージング 商品について ·新品 現行真空管 完動品。 decided to restore it. Excellent choice for a 6L6 or EL34 single-ended amp using either a 4 or an 8 ohm speaker load. KT66? Posted by Willie The Squid (A ) on October 27, 2004 at 15:49:33 In Reply to: 6L6GC vs. Winged C 6L6: This is a very nice tube with nice low end, not real deep but much better than any of the sovtek tubes including the now sovtek labeled Svetlana's. Bias is an alternating current of high frequency which is applied to the tape recorder to reduce distortion. Contact Us. The EH is a taller bottle than vintage while the JJ is the correct size as vintage 7591's. 08/EACH. Page 2. This Blog however covers a lot more than SET, and is not exclusively tube-related. 6l6 tubes have a prounounced midrange hump that 7591s don't have. The following guidelines should be taken into account: The free shipping option allows TubeDepot to choose the most appropriate carrier and service. Vintage numbers from 1932 to 1970 are now supported. Cathode bias with those voltages is around 30 watts. ★★送料無料★★ 親切な真空管ヘルプデスク 無料相談 0120·194·380 プレミアムクラス 最高グレード 極上の真空管サウンドを求める方にお薦め·全数検査、210日間保証、72時間エージング 商品について ·新品 現行真空管 完動品。 ★★送料無料★★ 親切な真空管ヘルプデスク 無料相談 0120·194·380 プレミアムクラス 最高グレード 極上の真空管サウンドを求める方にお薦め·全数検査、210日間保証、72時間エージング 商品について ·新品 現行真空管 完動品。 In my office I'm running a Fisher 800C receiver from 1964. There are several in the sequence as manufacturers gradually improved it over the years and discovered new ways to push the tube to higher powers. 1. You're thinking of the 7591A power tubes in some of the Ampegs. Exhibit B,C: tubes included: (4) tested, matched Scott branded 7591, (4) matched RCA 12AX7A / 7025 and a NEW JJ 5AR4, (just installed). The 6L6 was introduced in the 1930s and made in the United States. Our website features secure payment options and fast, convenient shipping around the world. 0 The original 7591 valve was introduced in 1959 and is a high power valve that is a designers’s dream as it is so easy to work with. However, the good news was that I did get bunch of nice 6V6 's , some metal jacketed 6L6's  High quality, sturdy Russian construction and great tone from the NessTone Premium 6L6GC. 5: 33,000: 5. On these amps the cathodes of the 7591A's  I needed to replace some 7591A vacuum tubes in two Eico amplifiers: the ST-70a and While the new manufacture brands of power tubes such as the 6L6GC have as its output was only 82% of ideal versus the 97% average of the others. 66) /**/ Ver. 6L6 Cathode-Bias Class-A Power. An attempt at De-Mystifiying the Sovtek 12AX7 WA, WB WC Variants. if using as single ended amplifier as EL34 ,can be use 6L6 . 95 each) is an in-house design from www. lettered tubes a245 - y2057 _ vt - military ( u. Monday-Friday 8:30 am - 5:30 pm Pacific. 6V6GT Power Vacuum Tube. 6v6gt - 6z10. Tubes with part numbers beginning with 7591 Tube are in stock and ready to ship! Javascript is disabled on your browser. 7591 vs 7868 Tubes. You desktop speaker are most likely powered. 50 watt (17dBW) amplifier from RCA Receiving Tube Manual, 2 7027A schematic parts list. Nobsound Vacuum Tube Amp Amplifier Plate Bias Current Probe Tester 8 Pin Socket for EL34, KT88, 6L6, 6V6, 5881, 6550, KT66, KT100, KT120, 7027 (CT1-C, Cathode Current) 4. bobyoung53 Supporting Member. It has the same pinout as the 12AX7 but is not electrically compatible and is taller. Cheaptubeaudio prioritizes coverage of unusual and rare gears, particularly vintage ones, on which little info can be found on the internet. 43 - 47. 7591 Power Tubes; 7868 Power Tubes; EL84 Power Tubes; KT120 Power Tubes; 6L6 Power Tubes 7 Products Found Sort. I rewired the sockets on an old Ampeg that used 7591's to accept 6L6's. BustedGear. Check out reviews and ratings of our 6L6 and 5881 tubes. It can be used also in some 6L6 amplifiers. It will now be the standard OT for the 10W Chihuahua. 6n3c - 6q11. The 7591 doesn't seem too far off the mark from the SF Champs I've played previously, main thing is the additional head room & I think a slightly more grindy breakup character when you exhaust it (kinda similar to comparing a 6L6 to a 6V6). Screen grid Another fine helix (spiral) wire is added and placed between the Grid and Anode. The tube complement is a 12AX7 for the pre-amp, a 12AU7 for the phase inverter, a 12BH7 for the voltage amp, a 12AX7 for the driver, a pair of 6L6 GC/1614 for the outputs, and a 5U4-GA for the rectifier in each MC30 mono amp. After I finished wiring the stereo SE tube amplifier, I fired it up and what a glorious sound! It has better sound than my Push-Pull KT88 commercial amp. Note : 6L6 family is almost same as EL34 ,,6L6 is just similar of 807 , looks very different but same tube. Title: 7591 Author: Sylvania Subject: FP-2010-02-12 Created Date: 2/12/2010 10:27:21 PM 6L6 was originally developed in USA in mid 1930s. 12 AT. I am using a DIYTube ST-70 driver board to drive the 7591's and the Heathkit power and output transformers and rectifier. Take a look at the Stereo Tube Headphone Amp with 24-bit/96kHz USB DAC, Bluetooth, and Preamp Out. Good question. For full power output to be developed, the drive signal must overcome this bias voltage to drive the tube to a saturated level. 7591 vs 6l6

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