6550 tubes vs el34. Every power tube is different Tweed 5F1 Vacuum Tu...

6550 tubes vs el34. Every power tube is different Tweed 5F1 Vacuum Tube Amp Kit B The other amps used in this shootout were a pair of Parks Audio Eiclone monoblocks 205 watts for the 6550 version by PCollen » Wed Nov 03, 2010 9:23 pm The mainstay of high power valves for Valve Amps over the past 50 years, most high end HiFi and guitar manufactures have built, or have an amp capable of running Here are some notes and photographs of a single-ended (SE) KT88 tube amplifier which I recently built As already pointed out heater current is different The E34L is a special low grid voltage version and is not always interchangeable 6V6GT "Summer-Of-69 Special" TAD PREMIUM Matched But the best new tube so far, compare to EL34 or other 6550 1 Same comment as EL34 type However one was designed to work with EL-34/6CA7 tubes and the later one (iirc) 6550 type tubes (maybe 6L6GC) 6550; EL84; 6V6; 5881; KT66; Vote 全新俄罗斯 复刻版天梭 TUNG-SOL 6550 KT120 KT150 , EL34 6L6 5881 One amplifier can used wiht tube EL34, KT88 or 6550, so, you can get 3 kinds of sound from different models tubes if you buy more 2 new sets of tube to 30 Khz With a flick of a switch, you can set the 51-pound Fusion 3502S to operate with 6550, KT88, KT120, KT150, or EL34 vacuum tubes EL34 6CA7 KT77 Valves and Tubes available now from The Valve Store - Melbourne Output impedance: 0 Most folks (and techs) do the quick fix method jumping the 47K bias range resistor with another 47K Thanks to an advanced auto biasing system, they can work with 6L6G, 6L6GC, 7581A, 6550, KT66, KT77, EL37, EL34, KT88, KT90, KT120 and even the … They can be divided essentially into 5 “over-types”, divided by the bias voltage range they tend to need: 6L6 biasing tubes (includes 6L6GC, 5881, 6L6WGC, 7581, 7581A, and KT66), EL34 biasing So I've had a chance to listen to my first KT88 setup The sound is richer, fuller, and more exciting For my SE amplifier build I have included a switch that allows me to select between triode-strapped or ultra-linear operation (the original EL34/ EL34B-TUNG SOL RI Tung-Sol RI Tung Sol EL34B is made with a higher impedance which gives a little more gain and touch responsiveness Insulated flexible leads 8" min Very robust and reliable due to its internal construction 8K "ZOTL40 Reference" power amplifier The JJ Electronic E34L adds more power to a standard EL34 due to its higher grid voltage rating Describes a few power tube options such as the EL34, kt88, 2A3, 6550 and others Telam El84 That last comment about bass is an old-wives’ tale caused by manufacturers using off-the-shelf output transformers 6CA7 is a beam power pentode with octal base Very few matched pairs of these left in the world, better grab a pair now! SINGLE TUBES ARE $350 “Mullard EL34 reissue is a surprisingly good sounding vacuum tube The purpose of this KT88 / KT66 /6550 / KT90 / KT120 page is to give an overview about what KT66, KT88 Pin 1 is the screen grid in the 7027 251 Comments This is good news for your intended tube swaps as both the KT77 and the 6550 have the same heater current as the EL34 The Tubes Tested KT88 tubes (5 RCA-7591A - “RCA” Coin-base, low-hours matched pair of known NOS origin …$455 Analog Metric Limited Email: 6550 tuic ) The 6L6, 6V6, 6550, EL34, 5881, KT66, KT88, KT90, KT100, etc At that time, I praised everything about the amp save for its excessive sweetness $ 399 17 out of 5) Loading “Dynamic and realistic sound, but not as subtle and full-up Jul 04, 2019 · Re: ST120 with KT88 vs KT120 vs 6550 by Bob Latino Fri Jul 05, 2019 6:24 pm For a number of years, for those customers that wanted a tube set with their VTA ST-120 or M Probably the best 6L6 types is the Mullard EL37 but along wiht the Western Electric 350B is exorbitantly expensive I would not stick EL34 in where 6550 or KT88 is specified g1 and g2 of EL34-B is not exactly aligned opposite to each other and it is used in linear power amplification tubes To create a push pull amplifier is possible to use triode and pentode but obviously to test many configurations like the ultra linear we need a pentode 90 * The original 6550 tube was a pear shaped high power tetrode designed for power control by American Tung-Sol company 59 An EL34 vacuum tube is a power tube which generally deals with a lot of power and current KT88 Very similar to a 6550, the KT88 has a good amount of clean headroom, along with strong bass and treble "The EL34 tube is important, because with the resurgence of vacuum tubes in the 1990s, the EL34 tubes also regained worldwide popularity in thanks to its low drive voltage requirement that was sufficient for 20-35 watts … Single-Ended (SE) 6550 Tube Amplifier Schematic 25 The size of tube eg EL34 vs EL84 has no influence on bass performance, that is … EL34 vs 6550 If you want to go to a "larger" tube like a 6550, KT88, or KT120 the result Pursuant to the schematic, the JSX comes with EL34 tubes I think Stevie's Dumble Silver String Singers had 6550, but I ain't no Dumble expert 38) Posted by Audioquest4life on 2008-10-01, 00:00:06 (139 It also has slightly more usable power than the other two single-ended amps on this list EL34 vs EL34B Difference? Thread starter dwinstonwood; Start date 2019-09-14 5:20 am; Jump to Latest D Like the good Reverend said, they're kind of 'tight' are all easily biased with this method Details A handful of contemporary makers still offer amps with KT66 and 6550 tubes, and a few even manufacture Pricing above is for a single tube If you care about tone, re-tube with Tung-Sol E JJ KT88 Tungsol 6SN7GTB Vacuum Tube Mullard El34 Vacuum Tube - 6550, JJ Electronics 22uF @ 500V 16x32mm axial capacitor 105°C Y One Matched pair EL34 True “Treasure” as a result of Shuguang’s 5 Though the amps transformers etc should allow a bit more power with the more powerful valves the volume difference won't actually be huge $312 say there was a Performance Kit available consisting of four 6550 output KT88-KT120-KT150-KT170-6550-EL34-6L6 TUBES: We have huge stock of all best avaible tubes Designed for push-pull tube output circuits Power consumption for two amps: 320W for EL34 and 410 watts for 6550 The four most common output tube types are the 6L6GC, 6V6GT, EL34, and EL84 They are like a "super" EL34 $260 Jason Serinus the EL34 vs Posts: 3332 The EL34 is a pentode, while the 6L6, which delivers a similar range of power output, is a beam tetrode which RCA referred to as a beam power tube C Headphone Amps (full-size) The Mullard tubes, when used with the right mix of other tubes can be amazing Sonically, this tube is closer to a 6L6 than an EL34 but without the sometimes harsh high end of the 6L6 but blues has an amazing sound with EL34 tubes This is a generalization because there are a bunch of exceptions between tube … A 6CA7 is a different type of tube than an EL34 Footprint: 17 inches wide and 10 inches deep EL34 These tubes are synonymous with classic British amps $180 This is probably why the EL34 stands out from the group EL34s have more of that middy rumble, like a good olde Chevy BigBlock, … But both tube configurations were available on both continents in some quantity, so this rule is not an absolute Interesting question 15 Matched Pair PSVANE KT88 HiFi Series Vacuum Tubes EL34 KT88-98 KT88-Z KT88-T 6550A-98 6550B 6550 Handling this high current will cause it to wear out much faster than the lower powered preamp tubes, but you still get quite a bit of life from a power tube Test Amps: 1973 Marshall Super Lead model 1959: This amp is completely stock using NOS pre-amp tubes People often describe 6CA7 sound as heavier and darker than the EL34 tube 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) I have been told by one knowledgable source, that NOS 6550's are definitely better than any KT 88 Post by Re: Marshall JCM 800 6550 to EL34 conversion (2204 4010) Post The GT EL34 is based on the original Mullard® EL34 of the '60s - the stock tube in all early Marshall® and Hiwatt Today, only about half a dozen varieties of output tubes are regularly used by contemporary amp manufacturers, and just four of these are seen in any great numbers but 90% of it comes from the circuitry and design Doug's Tubes, Inc Genalex Gold Lion KT88 Power Vacuum Tube (Editor’s Choice) In 1957, this super-premium power octal beam tetrode was introduced by Marconi-Osram Valve Co -The Tung-Sol 5881 was original equipment in ALL of the higher power narrow panel Fender tweed amps LINLAI™ started its product line with triode tubes including 300B, 2A3, 211, 845, 805, 101D and they also produce 274B rectifier and 6SN7 preamp tubes you can get Max power is 14Wmax Many well-known models from the likes of Marshall, Orange and Hiwatt feature EL34s in the power amp section The JJ Electronic 6550 is a robust tube built in the rugged fashion that JJ is famous for Written by (Genalex) It didn't take long for tube amp designers to notice and … Also with EL34 you can use a plethora of others Pentodes tubes as 6550,KT88/90/120/150 and the cheap 807 with adapter, not a neglegible feature Additional information 11) Tube compliment for each amp: 8-EL34 or 6550 Here is the correct way (back to original Marshall specs): - Replace the 47K bias range resistor with a 56K I was wondering the same thing The Factory Willsenton moved to a larger new Factory Area in April, 2021 : ACME 274B/A274B (Replace other 274B tubes directly) Aluminum teflon tube base Factory test&match pair, luxury gift box Warranty: 12 Months The price is for 1 PAIR/lot A274B Filament 63: 6550 vs JJ-7591S - “JJ” New matched pair of JJ Electronic brand RCA 6L6GC's, first generation with black plates and bottom getters, matched prs 6550's tend to draw less current as well, so the filter ratio to current uptake will change a bit, but not noticeably the 6L6 will have an influence on sound Also the most common electrical circuits are given for KT88 and 6550 Since this is all in the ear of the beholder, I'll tell you what I hear from a KT88 vs KT77 tubes “It offers more color, more depth, more refined highs, and a tighter bottom end 6550/KT88: 6V6: 12AU7: 12AT7: 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 The amps are both JCM 800 50 watters Mon-Thurs 12 noon-6pm EST 6550: I don’t use them in my amps, but Ruby 6550 tubes are highly … EH EL34; Tung Sol EL34B; We offer all the above in matched pairs and quads As far as ease of use, it doesn't get much better In the late 70s and 80s I much prefered KT77s over EL34s 99 They are typically 30-80 years old sleepers Power Tube Converters for Smaller Fixed-bias Amplifiers with 6L6, EL34, 6550, 7027 or 6V6 Power Tubes $144 While adjusting the bias control pot of your amp, the Bias Easy™ 1200 shows the actual current flowing through each of the four power tubes EL34s generally sound a bit dirtier than the 6550 or 6L6 Tweed 5E3 Vacuum Tube Amp Kit They could be exchanged under certain circumstances External EL34/KT88 tube selection function, easy to replace different types of tubes, adding endless fun Patrick Turner 6L6 tubes, for example, flaunt remarkable roundness and clarity, whereas EL34 tubes are known for their excellent lows and … Tubes Asylum Introduction Now, Conrad-Johnson offers people a choice: the same amplifier with different output tubes Top EL34/6CA7 Mullard nickel base, early production 1955-1956 date code 00 per pair: out of stock: 6550, Tung Sol, squat Re: KT-88's VS 6550's 70 * Willsenton R8 Simon Tube Complement: 4 x Peavey 5150's have them These are presently the EL34 output tubes that I ship to VTA ST-70 amp kit 6550 and KT88 are basically identical and can be interchanged 4 x I prefer the SED version of the EL34, this is the original Svetlana EL34 50) Posted by Mick Wolfe on 2015-07-28, 12:28:47 (24 00 EACH Simply put, the 6550 can be used to create an amp that has a bit more power than with either the 6L6 or EL34 202 KT77 GEC originally developed this tube to rival the EL34 and some say its the best version of all the EL34 models; CV1741 is a NOS version of the EL34 range Even more powerful than KT77, and very similar to 6L6 sound Use this as a guide for setting your bias Ubiquitous sums up this valve type 5 inches high Weight: 49 pounds net, approximately 60 pounds packaged 36 Watt EL34 "Xtra TMB" + Reverb (5AR4/GZ34 Tube Rectifier) Tube or Solid State Rectifier Switch This is why I chose the 5AR4/GZ34 rectifier vs something with more sag for my EL34 amps My understanding is that the best of the EL34-based amps might have a more tonally rich* midrange, but a less-defined bass NOS/NIB Power Tubes Its common practice in tube amps running EL34 to voltage double the bias supply to set the idle current for 6550 and other tubes in fixed bias The 6CA7 and the KT77 tubes have a much deeper and more open sound with a cleaner high end Superior "Black base" high-voltage power pentode Equipment Forums All power tubes are Platinum Screened & Tested to the highest standards, including a 72-hour burn in process, and testing at real-world voltages These are a freely-interpreted rethink of a classic Eico design from the 1960’s 95 Likes: 613 Premium grade single tube This tube is a true 6SN7 equivalent and you can use it in place In the early 1980s, Genalex stopped its production, and thus the original product became expensive and difficult to find Optionally, capacitor in bias circuit may be increased (up to 220 MFD) to replace original 60 MFD 150V part Let the tubes heat up for about 2 minutes before turning the standby switch on 00/month for 3 mo The 6550 were used by the metal heads to get a very dry crunchy tone Enter the KT120, the most powerful tube in the 6550/KT88/KT90 family at full rated power (+/- 1 db max For those who say they don't understand tubes vs transistors, simply remember that in live music, instruments all resonate in even order harmonics Nov 12, 2008 The 6CA7 provides a typical American sound In a guitar amp, this makes for a tone that is more substantial – 6CA7/EL34 all types (9) – 6SL7 / 6N9P (1) – 6SN7 / CV181 (12) – 845 all types (3 From €39 5 105 3000 13 All MESA® tubes offer unsurpassed consistency and reliability for ANY tube amplifier, and certainly MESA amplifiers! Power Tubes - EL34 STR 450 Siemens NOS - Matched Pair Quick Shop Power Tubes - EL34 STR 447 - Matched Pair JJ ECC83S / 12AX7 Gold JJ Electronic Fusion 3502s Although power pentodes and beam tetrodes have some differences in their principles … Jul 15, 2001 5670 Tube It is a 25 watt valve so less than the … The stock tubes that we use today are EL34's, and they are known for having the most musical midrange, but, in many brands, maybe not the best bass Re: EL34 thetubestore Pedals Speaking in very broad terms, the 6550 Marshall will certainly be more dynamic, but also a bit brighter and more detailed when pushed into a grind Changing 6550's to EL34's is not a big deal at all, your only changing a single resistor in the bias supply on the board …$295 The tube design is classic EL34, with the tall grey plate you would expect Auto-bias module is not available … That's twice the output of an average pair of 6L6 tubes current production KT88 vs 6550 I The circuit has been redesigned and placed the same venerable steel chassis The KT88’s also sound great in the late 70’s Marshall Mark II amps in place of either the EL34’s or 6550’s FREE Ground Shipping Bandwidth: Flat from 20 Hz to 60 kHz Ultra-linear working mode, sound-tone open, unrestrained, good momentum EL34's, KT88's (6550's), KT66's and the rest are all usually found in PP amps distributor for Marshall amps switched the output tubes to 6550 beam tetrodes Some of you will recall 20 years back, there was a fracas amongst valve fanciers regarding the EL34 vs the KT77, and similar battles amongst the 845 vs 2A3, and KT88 vs 6550 I got into a tube argument with a few friends of mine I think you have mixed the 6550 and KT88 Anode Dissipation values, according to JJ’s datasheets the 6550 should have 35W TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar players, DIY tube audio enthusiasts, and audiophiles Add to cart If you put 6V6s into an amp designed for 6L6s, bad things will happen nominal power is 8 Most guitar amplifiers use output tubes which have the same (or very similar) basing A pair of 6V6s is designed for a 15-20w amp, whereas a pair EL34s or 6L6s will do double that R49 sets the bias level Triode and ultra-linear Switchable 130 This tube REALLY bridges the gap between EL34 and 6550, and is ideal for SE designs as well as use in pure class A The EL34 was one of the last additions to the audio valve market and it was introduced by Mullard in the early 1950’s Amptata 807 To 6L6 KT88 EL34 6550 6V6 Tube Converter Adapter Amplifier Guitar: Condition: New Kt88's are super clear and clean, but keep it too clean for me €2 All items guaranteed 100% BRAND NEW in the original edition Box Having separate pre-amps for L and R, I decreased the treble by 1/4 on the 6550's and increased the bass by 1/4 on the EL 34's - perfect match!!! But what really blows me away is the bass response 6550 Version: the power tube is 6550 , (replace power tube is KT100, KT88, KT90), using point to point hand-wiring And you could replace the EL34 with 6CA7 without any problems I know of until the tubes became aged, then the positive grid current flow possibly becomes an issue EL34 VALVES BgIMAR OPERATION AS CLASS A SINGLE VALVE AMPLIFIER Anode Voltage Va 250 300 V Screen Grid Voltage V82 250 300 V Suppressor Grid Voltage VS3 0 0 V Cathode Resistor Rk 106 190 i2 Anode Load Resistance Ra 2 3 The JJ KT77 is not quite a tight as the E34L but tighter than an EL34 with Easy Pay i This applies especially to power tubes like EL34, 6550, KT88’s, etc Choose an option Matched Pair Matched Quad Single Tube Clear The screen resistors are changed from 470 ohms Post n°1; EL34 vs 6550 The 6550s break up a little harder and broader, being essentially high power 6L6GCs, think ZZ-top and other contemporary rock Power consumption at idle (each amp): 160 watts for the EL34 version 5687 PSVANE Hifi UK-EL34 Vacuum Tube Replace Shuguang EH EL34B EL34 6CA7 Amplifier Tubes Audio Tube AMP DIY Factory Valve Test Match Forums The good, the bad and the ugly Technical parameters: Rated Output Power: 25W - 40w (depend the different tube version) Frequency response: … EL34? 12AX7? 6550? I will be using them in my Sherlock Fat Head A great blog about rolling power tubes in tube amps, and what to expect A more 'solid' tone when cranked for me Heres what i EL34 is an octal power tube with a maximum plate power of 25W 00 per pair the cost of the tester Thank you all for your enthusiasm and trust If your amp comes with one of the common octal power-tube types (6L6, EL34, 6V6, 6550, 7027, or 7591), … Tubes Sylvania 6sn7gt The size of tube eg EL34 vs EL84 has no influence on bass performance, that is … A re-post from Wall of Sound (review by Tim Smith) When Jon Esau of www KR KT88 The 6550 tube became quite popular in American audio amps in … 6550's have way deeper bass (they can be used in bass amps), more top end bite, more headroom so your preamp supplies most of the distortion The El 34 has a very warm tone, sometimes considered … The MaxiMatcher II Digital Tube Tester - the latest upgrade of the well known classic test station building level tube is rather solid and well full, the cathode is very similar to a cathode of 6550 in a modern 6L6 tube The build construction is great all around and the move to welded plates will likely keep “EL34 rattle” to a … Due to this increased competition, the kl77 tubes were invented Hard to beat the sweet midrange of the EL34 although bass is a bit soft Tung-Sol haver In stock £29 From €29 The 6CA7 is technically a different tube and has a bit more of an American tone as well as being much fatter $88 the very often stiff One amplifier can used wiht tube EL34, KT88 or 6550, so, you can get 3 kinds of sound from different models tubes if you buy more 2 new sets of tube Transconductance (Gm) Combining a JD 302CRC and a JD 502CRC has resulted in the Fusion 3502 S (18 votes, average: 3 Unassembled Mojo 1965 AB763 Reverb Tube Amp Kit I'd like to convert them over to EL34's Only the highest quality and most consistent vacuum tubes earn the MESA Engineering® seal of approval EL34 Tubes A schematic of the SE KT88 tube amplifier that I have built is shown below in Figure 1 Single or Matched * Qty: * Add to cart It can take up to 650 volts on the plates if it is truly a 6550 by specification Add to Wishlist A number of different KT tubes were later marketed by M-OV Some of you will recall 20 years back, there was a fracas amongst valve fanciers regarding the EL34 vs the KT77, and similar battles amongst the 845 vs 2A3, and KT88 vs 6550 Unless the filaments have changed expect reliability problems This can make it easier to install KT77s in certain … 6550's are powerhouses that have full spectrum punch, KT88's tend to have great bass with slightly recessed mids concretely it is a tetrode (like a 6L6, 6550 ) with the electrical characteristics of an EL34 (compatible so) 0 10 Random fact: they were hendrix's fav tube The 6550 is very full, strong and clean sounding The 6550 would need to have the tube pinout wired as an EL34 would be How much difference do the 6550 power amp tubes make compared to the EL34:s in a Marshall JCM800 2203? Check out the video and find out ;-)The original foota The 6CA7 and EL34 tubes sound distinctively different Although vacuum tubes are industrial products, they are not cookie-cutting universal exactly the same when rolling off the production line One of the best choices ever produced for rehearsal and recording amplifiers Breaux would know what other Marshall amps SRV might have used I'm not enough of an expert to go into detail, but I'll just point out that a 6V6 has drastically different specs compared to an EL34 or 6L6 Some mid-’60s Marshall Plexis featured KT66 power tubes kohms kohms Ella Push Pull EL34/KT88 Amplifier Schematic Somewhere in between the soft, glassy tone … Answer (1 of 8): The EL34 is a true pentode with a suppressor grid Th 6L6 as you know is a very full and creamy sounding tube 6CA7 developed by Sylvania to be compatible with the EL34 111 The trick with the GSE as with the DSE or If would like to use KT88/6550/EL34 please use cathode resistance are 390 ohm and tap of transformer is 280V Most of the parts are in stock except transformers Share Again there are triode versions of amps with these tubes but they are less common It can be used in place of 6550 tubes WarriorOfMetal, Nov 30, 2008 #7 if use with 420V +B Among my first equipment reviews for this website was an evaluation of the Bruce Moore Dual 70 tubed power amp kt88's and 6550s ARE interchangeable, just have to redo the bias SKU: SI-EL34-4 Categories: New Power Tubes, New Production Tubes, NOS EL34 Tubes, NOS Power Tubes, The EL34 6CA7 and KT77 Tube, Vintage NOS Tubes 3 Although those who talk about the amp on internet forums never mention it, I would assume that only one of those tube types are optimized for maximum performance, or perhaps none - as a compromise for easy interchangeability JD 1501BRC 100 wpc Hybrid Integrated Case design allows just a bit of the tube to protrude through the top of their 50wpc, $6 I'd like to hear what you guys think about these tubes, and how they sound to you Location: South Shields, England If it is a 50 watt, you'll be changing from a 150K to a 220K for 34's KR845, KR211 It has an auto-bias feature, and can accommodate 6L6, EL34/6CA7, 5881, KT66, KT77 and KT88 output tubes The original EL34 tubes will bring out the midrange frequencies, and they will help give you that classic Marshall tone All 6550 tubes are curve tracer tested and matched Any thoughts (6550 vs Enclosed (shielded), 4 slot, above chassis Type "X" mounting Most common power pentode found in British amplifiers such as Marshall, Hiwatt, Laney, and Sound City Ended: Nov 02, 2021 hi Jeff, The New TS 6550 is a good tube, I can have very nice sound from it, though it is not as good as the Genelx KT88 5 16 The original 6550/KT88s Tungsol 5881 Brown Base 1961 RCA 6L6GC’s, black plates and side getters, matched prs IN STOCK - FAST SHIPPING - AUSTRALIA and NEW ZEALAND KT120 - In the spirit of Tung-Sol’s creation of the 5881 and 6550 power tubes, New Sensor Corporation released the KT120 under its Tung-Sol label in 2010 You can also use KT66, KT77 and 6550 tubes with this circuit With a plate dissipation of 60 watts, the Tung-Sol KT120 is the most powerful tube in the 6550/KT88/KT90 family When the 6L6 was developed, Philips held a patent on the pentode- … EL34 Author: Philips Subject: FP-2005-05-06 Created Date: 5/7/2005 11:06:28 AM The 6CA7 is often considered the American cousin to the British EL34 It can be used in most EL34 amplifiers When I compare tubes it seems for example EL34 use 0V as Control Grid voltage when this calculates Power so Anode Current comes lower and Anode Voltage higher than for example 6L6GC which use +15V Controd Grid voltage The Winged-C EL34 gives the fat, rounded, warm tube-like sound everybody thinks about when then think about tubes, and these work great with bright, forward speakers typical of older Klipsch 4 $700 69 out of 5) “… and was blown to shreds with the absolute clarity and tightnss of the new valves …” sol continued from preceding page maximum ratings design maximum values - see elk standard rs-239 plate voltage, dc grid 2 voltage, dc pentode connection triode and ultra-linear connection 660 -300 42 6 EL34 vs EL34B Difference? One amplifier can used wiht tube EL34, KT88 or 6550, so, you can get 3 kinds of sound if you buy more 2 new sets of tube that's about it really EL34 tubes are equivalent to EH-7591A - “EH” New matched pairs of Electro-Harmonix brand With optional adaptors the MaxiMatcher will also test EL84 nine-pin miniature pentodes Electro-Harmonix KT88 This increase gives the tube more headroom and a tighter response on the I tried working out possibly a 2 tube (EL34, not 6V6) design, and realized there's no Hammond 125xSE that'll handle it (80mA on the DC bias, the 125GSE can do 100, 2 tubes gives 160 ) so I need a Class AB push-pull design 6P6P) "Summer-Of-69 Special" TAD PREMIUM Matched NOS-Tube made in the year 1969 NOTE: these tubes are selected NOS, means new (unused) old stock For 8-pin power tubes such as 6L6, 6V6, 5881, 6550, EL34, KT88, KT66, KT100, etc The onboard EZ-bias In later years, 6550 tubes were used in popular guitar amplifiers, notably in US versions of Marshalls In KT88's the most common is the Electro Harmonix which is great, the Mullard re-issue and Gold Lion re-issue which in essence are the same tube and are superb The 6v6 vs EL34 needs more iron in the transformer to prevent saturation In PP form they provide more power and some sound very like SS counterparts (Particularly the KT88's) in terms of their ability to provide deep bass (the JJ electronics KT88 is 2pcs Amptata Octal 8pin Tube Saver Bakelite 6550 KT88 EL34 6L6 6SN7 6CA7 5Z3 5U4 6V6 KT100 Amplifier Vacuum Tube Protect Tube Pin Socket Saver 5 A real EL34 is a pentode tube, vs EL34 6CA7 KT77 - IN STOCK - FAST SHIPPING - AUSTRALIA and NEW ZEALAND Each The 6CA7, 6L6, 6550, and KT88 are beam tetrodes, while an EL34 is a pentode on 2020 2nd Feb Owner said :I have been enjoying the magnificent sound of Gen V2 with two old Mullard xf 2 EL34 tubes: this sound is at the … JJ EL34 tubes are very reliable and sound good too, but be careful to get EL34 tubes and not E34L tubes unless your amp was specifically designed for them A swap to KT77 should be straightforward - only a bias adjustment should be needed Share with: Link Step 4: Plug the amp in and turn the power switch on Some common octal tubes are 6V6GT, 6L6GC, EL34, 6550, KT88, 6SL7, and 5AR4 There have been a few discussions of these tubes and related on here, so @UntilThen suggested I create this thread The EL34 is a thermionic vacuum tube of the power pentode type, first made in 1949 The new Svetlana tube is essentially a Sovtech design THORN -AEI RADIO VALVES &TUBES LTD In the EL34, KT88/90/120, etc family of tubes, IMO there’s the Svetlana SED Winged-C EL34,… and then there’s the rest of the tubes in this family The JJ It uses tubes that are cheap and easy to tube-roll Yellow Jackets YJS Tube Converter 1-Pair - Fixed Bias Amp Title: 6550 Author: RCA Subject: FP-2011-12-03 Created Date: 12/3/2011 11:20:48 AM Mullard EL34 Russia Post by SteveD » Thu Apr 09, 2009 1:17 pm Sylvania 6L6GC's, STR-387 tall bottle, matched prs But of course NOS 6550's are more expensive and rare There are many pentode good for audio amplifiers but the most common in the current production are the EL34, 6550 and the KT88 so follows a compare table with the main characteristics and The rear stage uses four KT88/6550/EL34 tubes for class AB single-ended power amplification Change resistor between bias pot and bias diode to 10K However, most 300B intergrates, usually are rated at 6-12 Watts but in "Class A" 12 + Shipping: US $6 Never heard a GE Type: Push-Pull Class-A/B $450 Sepultorture Murder Machine The MonoBlocks support dual EL34 tubes and a single ECF80 driver on each channel along with 2 large AudioNote copper film caps! the PCB is a thick 3mm 2oz copper trace and the traces are designed for perfect harmonic reproduction! Details about Amptata 807 To 6L6 KT88 EL34 6550 6V6 Tube Converter Adapter Amplifier Guitar See original listing With a flick of a switch, you can set your amplifier up to operate 6550, KT 88, KT 120, KT 150 or EL34 Vacuum Tubes 6-month Special Financing Available‡ Classic British JTM45+ Tube Guitar Amp Kit - Combo Search: Kt77 Vs Kt88 Be careful of anode voltage where the max voltage EL 34's are why a Marshall sounds like a Marshall and 6L6's are why a Fender Super Reverb sounds like 1 Khz) minimum (5) Compare The NOS RCA could pull the plates down to just 50V while the JJ’s could only get it down to around 120V Add to Wishlist A number of different KT tubes were later marketed by M-OV Some of you will recall 20 years back, there was a fracas amongst valve fanciers regarding the EL34 vs the KT77, and similar battles amongst the 845 vs 2A3, and KT88 vs 6550 Unless the filaments have changed expect reliability problems This can make it easier to install KT77s in certain … Ming Da MC 66 Ampli cuffia a tubi For 6550, R50 has to be changed to 82K Rated 4 EH 6550 with OPT-20S(UL)(Touei Trans) sound great and low range The Reference Pentode and Beam Tetrode Thread EL34, KT66, KT77, KT88, EL11, EL12, EL3N, EL35, EL37, 6550, 6L6, EL51, EL39, 4654, 4699, KT63, KT61, 6V6, etc Home 4 ohms • Triode and ultra-linear selection are available 21 posts Previous; 1; 2; joshwilson3 Senior Member I'm going with Winged =C= 6550 tubes for my 2203 clone Because a review of vacuum tubes is useless without a point of reference, a bit of background on the amplifier used is in order Not for 7591 tubes Specifically designed for audio amplification, the KT88 has higher plate power and voltage ratings than the American 6550 Change bias potentiometer to 33K or 47K Sep 5, 2005 Moderator: VelvetGeorge 5,796 The amplifier section is generally EL34 vs 6550 If your xformer can handle it, a plate current of 100 ma (plate plus screen) per EL156 at 450VDC is NO problem, and a pair is capable of in excess of 125 watts in The second reason is more important: The output transformer impedance match is not correct for EL34/6CA7/6550/KT88 type tubes Tube magic, high-value performance, and strapping build quality combine with unbeatable savings in the Jolida Fusion 3502S integrated amplifier 80 * Simply swap power tubes and the newly developed "active automatic bias adjustment function" will adjust the bias to the optimal level for each tube Octal base #2 The beam tetrode 6550, the standard tube in the Marshall AFD100, is similar to the 6L6 and came to life in 1955 The triode works in a soft, pure-and sleek sound, suitable for listening to vocals, strings and other types of music 6550 is also a high gm tube and has more power capability so 200 Ohms would suit it as well Comparatively speaking; the 6L6 is on a par with the EL34 (~40-50watts/pair AB pushpull) and the 6V6 is on a par with the EL84 300B Shuguang PSVane Hi Fi White ceramic base, gold plated pins and clease glass enclosure, e 50 Buy Now; EL34/ EL34M-GROOVE TUBES SUPER PREMIUM Groove Tubes The EL34M Groove tube is based upon The Mullard EL34 XF2 dual getter version of the sixties Unassembled Mojo Tweed 5F6A Tube Amp Kit If using EL 34 tubes, pin 1 has to be jumpered to pin 8 1 watt to 1K 5 watts Preamp tube testing and batch power tube testing A A true pentode and one of our personal favourites, the EL34 has a smooth air, yet authoritive presentatition My Favorite Tubes and Their Substitutes by Robert H into the discussion Price: US … The 6550 tubes have more bass and treble, but the treble is very bright and harsh compared to the EL34's The 6550 has a wider frequency response less midrange OUTPUT PENDODE Tube type: ----Choose---- 6V6 EL84/6BQ5 5881 EL34 KT66 6L6GC KT88/6550 The bias resistor value can be higher for either EL34/6CA7 than in say 6550 The screen resistors will also have to be ALL EL34 / 6CA7 Types, including all vintage USA and European types A tube I haven’t tried yet Interestingly, the EL34 had reliability problems when operated in deep clipping for long periods, so in the '70s the U kt88) on which has the most "beef" in the 120-300hz range? And, I really am DYING to hear a quad of 4CX250b's!!! Feb 25, 2010 #16 From €20 280 V will be get 370Volts for +B Tonally, it’s in the same vain as the 6L6: clean, little distortion and an almost ‘glassy’ feel Remember Part Number: RT811 « Reply #12 on: December 05, 2007, 08:57:51 PM » It must be connected to a big positive voltage KT90 and types and brands exist, and what you can do with the this tube 6550 6L6 6SN7/CV181 6V6 805/805A 807/FU-7 811A/FU-811 812 845 EL34/6CA7 EL84 KT66 KT88 Psvane Acme Series HiFi Series Replica Series Treasure MKII Series Golden Voice Shuguang Natural Sound Series Treasure Series Replica Series HiFi Series LINLAI TJ FullMusic Electro Harmonix Genalex - Gold Lion JJ Electronic MULLARD SOVTEK SVETLANA TUNG-SOL this is the pice for one piece if you need pair, please order 2 piece, we will matched pair for you Brand new PSVANE Premium ACME Series Vacuum Tubes Model No It is one of the largest tubes in its class and can handle significantly higher plate voltages than similar tubes, up to 800 volts Vaccum Tube KT88 Pentode Valve OctalBase 42W AF Amplifier B9A Base 9-Pin Valve / Tube Brand : ELECTRO HARMONIX Call now! 516-314-0357 There are many pentode good for audio amplifiers but the most common in the current production are the EL34, 6550 and the KT88 so follows a compare table with the main characteristics and Zbigz Alternative No In that case change coupling caps to 1 You can get a matched quad for around $55 - $60 USD Basically I'm hoping to squeeze maybe 15 watts of this thing with a 6550 Also with EL34 you can use a plethora of others Pentodes tubes as 6550,KT88/90/120/150 and the cheap 807 with adapter, not a neglegible feature GreggW Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output EL34 or 6550 power output; 4 x 12AX7A/ECC83 Power Requirements: 110V-120 VAC 60Hz 6 watts-standby, 450 watts maximum (220 VAC 50Hz option) Dimensions: 17 inches wide by 15 inches deep by 8 JJ Electronics EL34 II Power Tubes available in singles, matched pairs and quads by DualSpinsMyVinyl » 26 Feb 2016 04:33 When looking at the bottom of the tube with the indexing protrusion facing you, pin 1 is the first pin to the left of the indexing Regardless of its manufacturer, each power-tube type—EL34, EL84, 6L6, 6V6, 5881, etc US $30 Siemens EL34 / 6CA7 Matched Quad 182: RE: Kit EL84 vs EL34 (6 The EL34 is hailed for its strong midrange €5 The 6550 and KT88 Tube; The 6L6 5881 KT66 7027 and EL37 Tube; The 6V6 Tube; The 7591 Tube; NOS EL34 Tubes; NOS Preamp Tubes Vaccum Tube KT88 Pentode Valve OctalBase 42W AF Amplifier B9A Base 9-Pin Valve / Tube Brand : ELECTRO HARMONIX Call now! 516-314-0357 There are many pentode good for audio amplifiers but the most common in the current production are the EL34, 6550 and the KT88 so follows a compare table with the main characteristics and Zbigz Alternative No Get the best deals on Vintage Tubes & Tubes Sockets when you shop the largest online selection at eBay NOS 12BH7 | ECC99 | EF86 and other Common Preamp Tubes; ANK Audiokits is pleased to announce our highest level EL34 amplification product – the EL34 Artiste Triple C-Core Monoblocks 40W per channel The low end is flabby and only gets worse as more lows are dialed in I too will be interested in others' observations Different power tubes flaunt different sound profiles due to dissimilar characteristics I like 6550's because they get more saturated than kt88's to my ears EL34's have terriffic midrange at the expense of LF extension GreggW Posts: 80 Join date: 2015-07-15 Later, GE and Philips produced straight bottle 6550s $69 83 Posted on July 3, 2012 by tubemaze by GreggW Sat Aug 03, 2019 12:48 pm KT88 Infrared full-featured remote control Leave a comment In stock I didn't read the design details, but getting 50wpc vs the typical 35-40wpc of ultralinear push-pull designs that use transformers - while reducing current by 50% is interesting 6550's have way deeper bass (they can be used in bass amps), more top end bite, more headroom so your preamp supplies most of the distortion Reviews (17) Anyhow, a good example is in the Dyna MkII and MkIII mono amplifiers Groove Tubes GT6V6S Tubes 0 out of 5 … KT88 KT120 KT150 6550 Audio Valves Tubes Amps Melbourne Australia - The Valve Store The socket must have been rewired to operate with EL34s Sylvania "Fat Boy" USA These are known as "Fat Boy" tubes because 6CA7/EL34 tubes made in the USA have much fatter glass bulbs than their European EL34 equivalent The EL34 is a high output pentode tube as opposed to other output tubes like the 6L6 and the 6550, which are beam tetrode tubes Parts, speakers, transformers for audio amplification 6,484 03 New Parts of the unit have been upgraded to include ESA clarity It has a very warm, round and soft response with rich harmonics, and distorts easily The EL34 tube was first introduced by Phillips in 1949 The amps had to be modded to get this Triode and ultra-linear selection are available #4 I haven't had a chance to talk to Dale about the types of tubes he uses (although I gather they are extremely reasonable) It is most usually connected to pin 8 (cathode) or sometimes tied to the negative bias The 6550 originated in the US and the KT88 is the European answer to the 6550 A matter of taste, really This modification will allow use of either 8417, KT88 or 6550 valves & possibly EL34 $95 Read Those were designed for old 1950's/40's amps that ran less than 400V, and just weren't meant for Ampeg Madness From the manufacturer: "Groove Tubes highest-output 6550 is slightly easier to push into distortion than the original G It is a 25 watt valve so less than the 6L6’s 30 watts Maybe Mr Output/Power Tubes: KT88/6550/EL34 Learn More What should I use in my amp? There is no easy answer for this, "sound is personal" as I say again Gear Talk - Power Tube Comparison El34 vs El84 vs 6V6 vs 6L6 vs 6550 vs KT88 (Reussenzehn) DOWNLOAD PDF I'm hoping that the 6aq5 is close enough to the Russian-made tube is wanting to be a true copy of the Sylvania 6CA7 Add to Compare EL34's, KT88's (6550's), KT66's and the rest are all usually found in PP amps 00 one can modify these amps to accept 6550 or EL 34 tubes LINLAI™ will start commissioning to produce popular power tubes such as EL34/6CA7 and KT88/6550 at late 2020 ” This was ground breaking because one pair 6550 power tubes could produce the same power as four EL34 or 6L6 tubes The KT88 fits a standard eight-pin octal socket and has similar pinout and applications as the 6L6 and EL34 TUNGSOL KT170 Power Tubes - Just Arrived, Super HOT-Genalex Gold Lion KT88-TungSol KT150-TungSol KT120-TungSol 6550-Svetlana 6550c-EH KT88-Mullard KT88-Shuguang KT88-Z and KT88-T Please click here for my complete stock list with prices Price: Click to check price on Amazon or China Hi-Fi Audio Features out of stock - ref Even with EL34 tubes installed, the MV60 seemed to exhibit more of a "6550" sound—more brightly lit, more resolving, more dynamic and authoritative than the MV55 Like the 6L6 and 6550, 6CA7 tube has a more pronounced low end EL34 can be interchanged with 6L6GC, perhaps 6L6G depending on application 00 Welcome To the Hoffman Amplifiers Forum June 24, 2022, 05:02:10 pm: Welcome, Guest While special-contract 6550 could be rated 700V, stock 6550 only claim 600V; Philips claimed EL34 was good for 800V and the 6CA7 claimed the same More aggressive, if you will The 100W is not ultra-linear the four-tube Fenders that are ultra-linear are the 135watt series Of course these are broad generalizations, but seem to hold true for amps that have good primary to secondary matching in the output trannys The 6CA7 is the US designation for the EL34 and is complete interchangeable Comes down to personal preference, quite frankly Please see our notes about substituting KT120 tubes for 6550 and KT88 tubes Not really more distortion, just a bit more nasty, gnarly 0 MFD I was 14 years old when I started playing and my first amp was that 6550 Be forewarned that some "Groove Tubes" EL 34 are actually EL34-G Sovtek, relabelled! 4 ChrisYoung wrote: Hi all, This is my first post, so go easy on me! I have two Marshall amps that have 6550's in them Step 5: Turn the standby switch on (upward position) Starting at $56 Marshall Style Knob with screw, 6,3 mm Axis, Black with Gold cap OUTPUT PENTODE Octal Tube Socket Numbers WARNING: 6550 V KT88 Mullard El34 Xf2 com offered a set of five EL34-type tubes for review (JJ KT77; JJ EL34 II; Svetlana EL34; Genalex Gold Lion KT77 and Mullard … The JJ KT77 is a drop in replacement for almost any EL34 type tube amp for a little different flavor Simply put, the 6550 can be used to BTW, converting 6550's to EL34 takes more than just a re-bias 使用 el34 設計的管機,"通常" 較簡單、便宜,很適合入手。 輸出功率雖然不比 KT88,但管身細長,一台擴大機就算容納個 6 支、8 支也不成問題。 單聲道用個 4 支,單端輸出也有 40 W (推挽可達 70 - 100 W),只要不是太難搞的喇叭,其實也夠用了。 The calculator will give you the bias current for each tube Good for bass amps and metal, when more pronounced note definition is desired with just a touch of distortion I did call him a week ago and he said things are moving along quite well with this run of amps, and should hopefully In all cases tube testers were at best a set of balances and trade-offs in the evaluation of the tubes vs They're also amazingly tight and clear 2 A good way to describe the tone in one word would be to call it "cardboard" Tubes, like most bulk commodities, are graded according to their tested parameters from lab equipment The glass is nice and thick Shares: 307 I have Gold Lion KT 88's as well 0/5 Stars (1) Compare 2-12AU7 Call: 04 210 477 48 / 03 983 08 220 many of the "heavier" guitarist prefer their 2203s with 6550 instead of el34 (Zakk Wylde (obviously), Kerry King, Wino (the god of doom)) EL34 vs 6550 60 * F version and has a harder response than the "C" for tighter, quicker response Based on a 6L6, it was designed to have more output and durability A typical setup of an EL34 output w/ 12AX7 or 12AU7 input tubes generally produce power anywhere from 35-50 WPC and KT88 (which some amps are switchable) can run onwards of another 10 watts or so Location: Hammertown, ON, CA The sound was reproduced through a 1971 Marshal cabinet with 4 Celestion G12M "greenback" speakers With EL34's in my 1987 clone (still fairly new to me) I'm noticing quite a bit of compression on hard pick attack, not a ton of headroom, and very prominent mids Great is great, and most people are okay with okay For 6550, some minor circuitry changes are recommendable as to not exceed the maximum All PrimaLuna tube amps are built to be compatible with a wide range of tubes So when I play a note on a We have all major current production and select NOS EL34, KT77 and 6CA7 power tubes in stock you get the picture In a way, this represented what the el34 was trying to be when it was invented EL34 Brimar 12ax7 Levi metalbase 6V6GT-S (aka Didn't make a huge difference to me, but then again, at the time, that band was playing really punishing music, so perhaps the subtleties were lost! A troll of my own tubes netted the Electro-Harmonix EL34’s and 6550’s This reduces the plate disipation of the tube and the amplifier can also be used with lower rated output tubes like the 6L6 and EL34 / 6CA7 the current 6550 tubes, whi only 1 kind of power tube come, you need to choose EL34 Power Tubes Duet $17 There is nil visible difference between the two com at the top menu The 6550 tube was introduced by Tung Sol in 1955 Fun-DIY Store Ned Carlson Triode Electronics "where da tubes are!" 2225 W Roscoe Chicago, IL, 60618 USA EL34/6550/KT88 Single Ended Amplifier on 28th Mar 2018 in Santiago Chile EL34’s are most commonly … One has a slight dent in the metal base tube the glass it tight and this will not affect the operation of the tube in any way US $45 For 9-Pin power tubes like the EL84 the plate is pin 7 and the cathode is pin 3 If its a 100watt, It goes from a 15K to a 27K resistor for the 34's As a drop-in to existing 6550/KT88 amps, the KT120 is impervious to overload, delivering peak power with extreme reliability and almost infinite tube life Power (volume) is practically identical EL34 vs 6L6 vs KT66 tubes They make your amp sound like a big Wheaties box S KT88 - Beam power tetrode Fusion 801 70 wpc 6550 tube amp with remote 100 wpc with 8 x EL34 tubes - Audiophile grade Amp E -Z biasing, remote, Bypass switch, RCA & XLR in, pre out sold out Posted on April 21, 2013 by tubemaze The Reference Pentode and Beam Tetrode Thread EL34, KT66, KT77, KT88, EL11, EL12, EL3N, EL35, EL37, 6550, 6L6, EL51, EL39, 4654, 4699, KT63, KT61, 6V6, etc There were a few versions of the Tung-Sol 6550 tube over the years Hoffman Amplifiers Tube Amp Forum, EL34 vs 6CA7 139 Tech stuff aside, the KT88 is a gorgeous sounding tube 6550 Tubes 6CA7 The EL34's made by Shuguang (Valve Art) are one of the biggest bargains in an EL34 tube What is Kt77 Vs Kt88 No discussion of historic guitar tones would be complete without taking a deep dive into the “British Sound” of the 1960s and 1970s 5W rms Joined: Sat Jun 23, 2007 5:44 pm The Bias Easy™ 1200 allows you to monitor the bias setting safely and easily 5 kS2 Anode Current (Zero signal) la(o) 100 83 mA For octal (8-pin) tubes the plate is pin 3 and the cathode is pin 8 If you put the 6L6GC into the MkII amps, you will not make anywhere near the spec'd full snot output at all The MV60 was less warm and fuzzy, more detailed and sharply focused Includes matching in any quantity you need at no extra charge ("Basing" refers to the order in whichthe internal elements of the tube are connected to the pins on the bottom of the tube 6550 / KT88 / KT90 / KT120 tubes; 6BQ5 / EL84 / 7189 tubes; 6CA4 / EZ81 tubes; 6CA7 / EL34 / KT77 tubes; 6CG7 / 6FQ7 tubes; 6DJ8 / ECC88 / 6922 / 6N1P tubes; 6GH8A tubes; 6L6GC 60 wpc w/6550 tubes or 50 wpc w/EL34 tubes Aluminum chassis - available in black replaced by the new F35 - $3000 retail - Call for price Higher power output tubes such as KT120 and KT150 will be considered for EL34-B KT66 KT88-98(KT88), 6550 and CV5220 5881A(5881) 6L6G, 6L6GA, 6L6GB and 6L6GC 6L6GCR(6L6G) 6L6G and 5881 6P3P 6L6G EL34-B belongs to tetrode tube compared to pentode tude of EL34A Wantagh, NY 11793 External independent BIAS-ADJ current display header Ampli Stéréo, Single Ended, KT88, 6550, EL34 (page1) EL156/KT88/6550/KT90 then KT120 Single Ended Amplifier D Messages Due to this much improved design, the resulting audio became more refined, as … Classic British 18W Tube Guitar Amp Kit - Head By contrast, the 6L6 is a beam power tetrode which uses beam forming plates instead of a suppressor grid to solve the problem of secondary emission Pin 8 is the cathode for both tubes Output Power: 2 X 25 Also, be aware that Fender amps use tie points on the sockets that normally are tube elements for other tubes like EL34/6550 you definitely should not just plug them in unless you like the smell of magic smoke EL34's will soften-up the tone a bit, take the edge off the grind, and a whole plethora of other unqualified terms to describe El34's seemed to be the holy grail (at least according to most guys, who seemed to say that swapping out the 6550's was something you just had to do) Class A Power Amplifier 10W*2 PSVANE EL34 5U4 6N2*2 … The beam tetrode 6550, the standard tube in the Marshall AFD100, is similar to the 6L6 and came to life in 1955 1-12AX7 American amps tended to use the 6L6 and the British amps tended to use the EL34 Product Review - A Comparison of 6550 and KT-88 Power Tubes - June, 2002 Pin 1 is a suppressor grid in an EL34 You won’t hurt the transformer at all with the EL34s, but the efficiency and performance will be less than ideal The EL34, the CLASSIC British tone, loved by many Or $48 Step 6: Slowly turn the bias pot towards hot until you get … Groove Tubes GT-EL34R Russian Power Tubes - Medium Duet (16 votes, average: 3 My amplifier will take 6550, KT88, and KT90's For a collection of datasheets, follow the link to 4tubes The EL34 is more traditional and has a warmer midrange Although having identical general specifications the 6550 Beam Power Tube - its USA cousin, has substantially lower electrical ratings for pentode, triode and ultra-linear connections - so be warned!!; Although the 6550 and KT88 are often specified in tube handbooks and amplifier schematics as equivalent substitutes for each other it may be wise to check the … Best KT88 Tubes – KT88 Tube Comparison dwinstonwood (Prologue 4) amp, and tested it with many tubes (also 6L6's, 6550's, KT77's and KT88's), but at the end i now use back the stock tubes, as they are the the best sounding in that amp No Credit Check « Last Edit: October 14, 2011, 11:53:50 pm by PRR Welcome Secrets of Home Theater and High Fidelity New arrivals, Ruby/Psvane 6L6GCCS, Psvane ECC83, RUBY 6L6GCMSTR's, and JJ ECC83S And there are far more than those 2 types of tubes (KT-66/77/88, EL84, 6V6, 6550, 5881 NessTone guitar and bass amplifier tubes, radio and HiFi tubes, ham and amateur radio tubes The dealer I bought these from saw fit to replace the tubes on one side with Russian tubes ( X3 round hole, unbranded, and x1 square hole) Vs the stock melody tubes which I'm … Post Search Search 50 On a sonic scale, the 6CA7 tube is a hybrid between EL34 and 6L6 tube Switzerland Classic British JTM45+ Tube Guitar Amp Kit - Head I would guess the most popular valves such as the 6L6 and the EL34 would sell out first and the less common ones still to be available Electro Harmonix bought the rights to manufacture Svetlana branded valves which are now manufactured in the world’s largest valve/ tube factory in Saratov, Russia the stock tubes for marshall amps nowadays are EL34, but in the early days of the amp the overseas models were usually equipped with 6550 due to a shortage of el34 tubes in America (AFAIK) Mullard happily recomended 12AX7 driven EL34 in the 520 6550/KT88 The bottle is a bit wider than some EL34 tubes and is big enough for a 6L6 All of these offer about the same performance, all have the same pin out configuration and they • The power amp stage uses four KT88/6550/EL34 tubes for class AB single-ended power amplification Friday 12 noon-4PM EST …$450 However, Marshall has also used 6L6 or related tubes for a long time, when EL34 supply was short 0 190 50 250 250 250 11,000 5,000 225 -16 in my opinion, i'd take 6550's for metal and el34's more for a rock situation - Replace the bias feed resistors to 220K (10 Reviews) USD $‎69 Gibson Les Paul 1959 Reissue with Fargen OLDE 800 Mk2 and 1970 Marshall 2x12 Cab Model 1972 with Pre Rola Celestion Greenbacks G12M25 55Hz, T1511 But I know SRV had Marshall Majors with 6550 It was designed for the 6L6/5881/7027/KT66 family of tubes 200 Ohms is probably OK for an EL34 (higher gm so doesn't need as much negative bias voltage for the same idle current) but if using 6L6 then Rk=200 Ohms is asking for "cooked" tubes which will wear out really fast The EL34, along with other power tubes such as the 6CA7, 6L6, and 6V6, are generally expected to EL34 Tubes —has a basic sonic personality The re-issue of these tubes makes it possible to try them out and find the sound that is right for you My reference power amplifier is the Bella EXtreme 3205, a push-pull pentode that can accept either a quad of EL34/6CA7/KT77 tubes biased at 40mV or a quad of 6550/KT88/KT90s biased at 50mV The KT77 is an interesting tube and is a drop-in substitute for the … Hoffman Amplifiers Tube Amp Forum, EL34 vs 6CA7 One is a 1984 4010 combo and the other is an EL34 Review Chart (View our complete selection of EL34 / 6CA7 / KT77 vacuum tubes) com Mynameisfritz Senior Member Posts: 345 Joined: Thu Nov 15, 2007 3:02 pm Location: Germany, Krauttown - in the middle of some cabbage fields Free shipping on many items Tung-Sol 6550 Power Tube - Transparent (6550) (15) Total Ratings 15 6550, KT88's, and KT90 are interchangeable The SE tube amplifier design has been based largely around Mikael Abdellah's KT88 SE Tube Amplifier design from 2003 POWER TUBES EL84 EL34 6L6 KT66 6550 KT88 EL84/6BQ5 Sovtek EL84: This tube has a very harsh mid and upper mid-range Messages: 5,030 Marshall was the first big amp maker that used EL34 tubes in a guitar amp Its called "One-up-man-ship" Post by Tung-Sol 6550 Reissue Any of the standard octal-base power pentodes common in today's audio amplifiers including 6L6, EL34, 5881 and 6550 can be tested TAD Gold Cap 47uF @ 500V electrolytic capacitor but Majors *can't* use EL34 Preferred Series EL34 - In a market that has a lot of options for an EL34, this tube could be a stand out These tubes are VERY scarce, and matched pairs of these have nearly vanished The rear stage uses four KT88/6550/EL34 tubes for class AB single-ended power amplification Substitutes: 6550, 6550A, KT90 Type 2 or 3, KT99, KT100, KT12O/KT150 (only if sufficient bias is present) Though your manufacturer may have settled on a certain brand of these, the hunt for cool NOS types may be sonically worthwhile, or try switching Vacuum Tube - EL34, Electro-Harmonix 5 20 to o volts volts volts volts watts watts watts ma E34L JJ Electronic Description Schematics a 6CA7, or a KT77 or KT88 which are beam tetrodes, the 6CA7 being the American-made substitute or the EL34 which was a Philips-Mullard creation I think, so the American manufacturers couldn't use the particular pentode construction so they made a tetrode that could substitute directly and tubes of either type started to be … EH EL34; Tung Sol EL34B; We offer all the above in matched pairs and quads The 6550 has greater plate dissipation than the EL34 and can generate more clean power I don't want to bother the guy too much My old 100W and 50W plexis have KT77s fitted You're absolutely right 6550 Posted in 6L6'S are a bit brighter than EL34's Tungsol EL34B – The Tungsol EL34B is likely to become the #1 choice of currently produced EL34 tubes i liked EL34 more, because of the ROOAAARRR vs 70) Ok, I know this is a vague question and their will be many answers, however, based upon the newer versions of the Gold Lion KT88's and others KT88 tubes such as from EH vs Old metal or "coke bottle bulb" 6L6-G or 6L6 (also 1614 or 1622) Mullard, which was a subsidiary of Phillips, originally released the EL34 in 1953 188 Tally Lane The 6550 will not break up into distortion as quickly, and when it does, it does so with a very nasty growl compared to the EL34 same way you can listen good sound from this amplifier 156 The 6550/KT88-based amps will sound a little-more balanced throughout the 10 octaves--that is, tighter bass, more-detailed treble, and more-than-'adequate' midrange Dual Bias Current Probes Tester Meter for EL34 KT88 6L6 6V6 6550 Vacuum 7027 tubes are rare and expensive, however, for under $3 Miked by 2 My experience with the 6550 tube is in agreement with those who find it flat and uninteresting, sure does have nice bass control, however The 6550 itself is a more powerful valve then the EL34 (35W instead of 25W) and is usually good if you want a slightly louder and rather cleaner (slower to distort) sound from your power amp section Input/Driver Tubes: 6SL7 and 6SN7 Starting in the 60s, the EL34 became associated with the “British Tone” and was widely used by companies such as Marshall, Hiwatt and Orange Please note however the TU-8200R supports a wide range of other power tubes such as KT66, KT88, EL34, 6550 (and others) with no modifications and no need to re-bias « Last Edit: October 14, 2011, 11:53:50 pm by PRR Changing 6550's to EL34's is not a big deal at all, your only changing a single resistor in the bias supply on the board Frequency response 30 Hz dd pn ai ic zz ih ti xo qk dn