Kt77 vs el34 El34 > 6L6 (in all and every amps, except SLO-100 maybe?) but. Feb 17, 2022 · - The KT88 is not a drop in replacement for the EL34. Find out which tube is best for your guitar or audio amp. Much more so than for the JJ KT77s, which are about half this price, but people report that they don't sound as good or last Nov 17, 2022 · The EL34 is a much more modern tube than the 6L6, having first been introduced in 1955 by Mullard, owned at the time by Dutch electronics giant Philips. However I have XF2 BVA on a Marshall plexi and I bought those tubes all the way back then. Both are British tubes. Maybe I'll keep a jar of "mad money" from selling off gear to save up for a set. They are tubes that came with the amp when I bought it, so my experience is limited to the KT77's. They also seemed to be much more reliable,stable,and less prone to microphonics and rattles. Click to expand After trying various tubes in my ST70 I settled on the JJ KT-77's also. E34L Tesla/JJ(EL34 Sky Blue)2. Again have read several very positive reviews, for example Jim McShane likes them. 6l6, KT 77 vs. I like them a lot, with the GL being a bit more open than the JJ. Jun 1, 2021 · Caveat, I've never been a big fan of 6L6 based heads - I'm all about EL34/KT77 (=C= EL34, I mean, NEXT level!!!!, GoldLion KT77) and KT88/6550 (GoldLion / =C= respectively). Definitely sparking my interest given how they are being described. Mar 24, 2018 · Personally depending on brand I like the family of EL34 tubes in a SE amplifier best. KT77s are somewhat of a mix but the Tube is overall more compressed with less perceived headroom. This has The EL34, 6CA7 and KT77 also have similar pin outs. The screen wattage ratings are lower on a KT77, 6 watts vs 8 watts on the EL34, but a KT88 is the same 6 watts so again probably not an issue. Save your money. Many of the EL34, 6CA7 and KT77 tubes listed here also have customer tube reviews. EL34: Known for its tight, mid-focused growl, the EL34 tube is a staple in British amplifiers, often used in iconic rock and blues settings. I felt the Mullards were a bit grainy on top, I do like the GL KT77, but the 7581a are more refined overall. The change these tubes made was amazing, it transformed this old amp from sounding ok, to an amp that is maybe the best I have owned, and one of the best I have heard. 0 Members and 1 Guest are viewing this topic. I wanna hear some experience from others on EL34's and KT77. Apr 13, 2013 · Anyway, when I first got this amplifier new, I sold off the Svetlana EL34s and put in Genalex KT77 (Russian reissues). From our review in guitar amps: "The Gold Lion KT77 is a drop in replacement for an EL34 or 6CA7. They are not the same thing as an EL34 with a different number. These are all generally drop-in subs for one another in the same amp, with a few small details about max grid resistor values. Jan 25, 2023 · Just my opinion-if the KT77 sounds like the bigger tubes vs EL34-whats the point? Why not simply go with a KT88 if that's the sound your after? Then you have a amp that was actually designed for that model of power tube. It excels in delivering a smooth overdrive with a pronounced midrange that cuts through a mix, especially when pushed to its limits for that classic rock distortion. In SE you will have much more power with either the 6P3SE Jun 9, 2007 · As for the Randall RM100 (which is a modular "modelling" amp), I am still thinking of a nice EL34 upper midrange roar that you can't get from 6L6's. Right now I am using Gold Lion KT77's in one of my amplifiers and am enjoying the sound. If you drop in the KT77, how would one adjust the bias? Do you still center the bias meter like the other tubes or does the KT77 require a different voltage? Jun 1, 2021 · EL34 players may think 6L6s are stale because they lack the upper mid breakup that EL34s are known for which is a different feel on the strings when playing. Sep 27, 2022 · KT77 produces outstanding sound with better clarity and extended headroom. EL34 is cheaper and durable. I am a bit EL34 fan and find a nice balance in that tube of SET-esque richness and modern linearity. The same pinout does not necessarily make the tubes the same. Are you looking for the very best EL34 power tubes for your vacuum tube amplifier? This is the place to start. If you have a Marshall amp and find EL34’s too compressed and 6550’s too crunchy the JJ KT77 may be just the ticket. Now, I've read the Genalex Gold Lion KT77 are also very good, with extreme top end detail and neutral sound. Mar 28, 2022 · In audio amplifiers, the EL34 tube is renowned for its trademark velvety-smooth mids. Choosing the greatest EL34 tubes ensures that the music’s style is consistent Jun 16, 2019 · If it's midrange you're after, EL 34's are your better bet. The Mesa Boogie EL34 has more of a modern sound to it. Each of these vacuum tubes brings its unique sonic signature and electrical characteristics to guitar amplifiers and hi-fi systems. See the EL34 in Fig 1. Nov 14, 2022 · I have a question. Used to use them in my Dyna 70's,and man did they ever sound good in Hiwatt and Sound City guitar amps! May 18, 2022 · A question about the sound differences between the EL34, 300B and the KT150. Different sonic signature than EL34, less bass but more airy twinkling treble. A little more dynamic, less compression. Rather than the mid-focused tone of EL34, KT77 will provide a punch to go with the mids. Jan 8, 2012 · While the KT77 and EL34 are generally considered to be interchangable, it's wise to keep in mind that the KT77 is actually a beam tetrode while the EL34 is generally considered to be a true pentode. The JJ KT77 and 6CA7 are direct EL34 replacements that won't risk overheating the OT. Mar 31, 2020 · Their main difference is that kt77 tubes have more headroom, detailed highs as well as bigger bottoms than the el34 tubes. Self biasing is common for lower wattage < 30 watt amps, not common for higher wattage. Oct 9, 2024 · EL34 limiting values KT77 KT88 KT120 The KT120 resistor values are lower than any of the others, so if it can safely run one of those I doubt the resistor values are high enough to kill a KT77. Here's the quote from his description of the tube: Gold Lion KT77 Notice: We supply the very finest KT77s that you can get and our testing is the best. Test Amps: 1973 Marshall Super Lead model 1959: This amp is completely stock using NOS pre-amp tubes. Nov 29, 2014 · Yeah, in mt SET amp the GL KT77 was very good, maybe a little clearer and more accurate vs most EL34s. Thread starter georoger1; Start date Aug 22, 2008; G. georoger1 Member. Mar 18, 2017 · I will say I personally very much dislike the 6550 tube from past experiences. You might precisely consider how the quality changes in both KT88 and EL34. The 6CA7 and KT77 are. Kt66's on the other hand will work and what you'll hear is the sweet mids of an EL34 combined with the tight thump of 6L6's. However, el34 tubes are more durable and slightly less expensive. But then I want some more bottom for the other non-EL34 modelled sounds, like the Rectifier and Blackface modules. Looking at the spec sheets, they both have max dissipation of 25 watts I am assuming that this means the KT77's bias at the same levels (the recommended setting for the EL34's, is anywhere from 360 - 440 mv for the Jolida 3502 amp. Simon Says 59% lizard. Yes, Marshall was the first big amp maker that used EL34 tubes in a guitar amp. Learn how EL34, 6CA7, and KT77 tubes sound and differ in design and history. You can find amazing features at a higher price range in KT77. KT77 vs. Same as a 6CA7 is electrically like an EL34, but built like the KT77. Period. Jun 18, 2019 · Ultimately I settled on the JJ KT77's but the Tung Sol is a fine performing tube imo. The present tubes are SED Winged =C= which are no longer in production so prices are higher. The Best EL34 / 6CA7 / KT77 Power Tubes - Reviews and Guide. Sep 14, 2019 · EL34 vs EL34B Difference? Thread starter dwinstonwood Start date (Prologue 4) amp, and tested it with many tubes (also 6L6's, 6550's, KT77's and KT88's), but at Jan 7, 2018 · I’ve not tried KT77. So I've found JJ KT77 isn't a wise choice to use as a stock tube. Sep 27, 2015 · In my SE amps, I find the GL KT77 and JJ KT77 to produce a very clean, open sound with neutral highs and a clean, well-defined but not particularly deep or strong bass. Each tube infuses its unique character into your guitar’s tone, affecting the nuances of your sound quality. Pursuant to the schematic, the JSX comes with EL34 tubes. 6CA7's do not breakup as early as EL34's and 6CA7's usually are fatter sounding. KT77's are more about power and the bottom end. Being manufactured in Europe, they were much more easily available for makers like Marshall, who in 1966 switched over from KT66 tubes (which were effectively a 6L6 clone) to the EL34. Preferred Series when feeling adventurous for powertubes; Preferred Series for high gain low noise preamps, just a great business to work with - done. Jul 20, 2019 · The EL34 tube came first, and it was designed in the 1950s by a European company called Mullard. 40 to 0. What I would like to improve in the sound is a bit more dynamics/vibrancy, more detail, a bit fre Re: JJ KT77 vs E34L (not EL34) Discuss! « Reply #13 on: June 30, 2011, 04:21:42 PM » might be worth trying a 5751 in V1, just to reduce some gain hiss slightly while not actually decreasing the overall preamp gain THAT much. Dec 25, 2018 · AFAIK, Marshall 2204 run at ~400V. They have a bit more headroom and bottom end compared to an EL34. Should be a nice upgrade over EH EL34s. Yes, I tried the new GL KT77, and thought they were the best sounding reissue tube amongst the EL34/KT77/6CA7 group that I have tried. Thats always been the knock on the KT77-beside the shorter life. Re: KT77 vs. Oct 31, 2022 · My VHX and Herbert mk3 both came with 6l6's. I thought why not approach it in a different manner, what are the thumps up. The 6CA7 is the American designation for EL34, and some 6CA7 versions use beam power construction instead of a true pentode. I liked them better than the Svetlana and the Fat Boys in both amps, when I really wanted to like the Fat Boys best. Don't seem to cut thru (mids) as well as EL34's. May 10, 2023 · I am currently running Gold Lion KT77 power tubes in my amp. Sep 27, 2015 · I've always preferred the Sylvania 6CA7 over any EL34. Alternatively, passionate guitar players can also widen their options and take a look at all the features of other models, such as KT 88 vs. I always use JJ E34L's if I can but the Ruby EL34's in my Einstein are pretty happening Feb 11, 2019 · I'm currently leaning toward the KT77's as I understand they sort of split the baby with the lushness of the EL34 and the slam of the KT88's (but who the hell knows until/unless you try them all). I had so many issues with el34 tubes, I had to try the KT77. The real KT77 was closer to the Sylvania 6CA7 than the EL34. I like them better but I like the kt77's way better than those even. You should be able to replace that KT77 with a 6V6 with a simple change of the cathode resistor to bias it properly. I prefer EL34L for clean sound too, because it is glassier sounding. Print. With silky-smooth texture, EL34 excels in recreating horns and female vocals. Aug 9, 2024 · Have quads of the reissue GL KT77 and Tung-Sol EL34 as well as the "house brand" quad of EL34 for my AirTight ATM-1S amp. Thread starter midnightlaundry; Start date Jun 10, 2013; Nope just another flavor of EL34 in a bigger bottle and higher vacuum Nov 23, 2024 · They should ideally compare both models’ qualities, including the KT 66 vs. At first i hated it, i was comparing it to the EL34. Sometimes I miss that amp The lead tone on the ultra channel was SICK EL34's and 6CA7's may work the same,but usually the sonic differences are large. In conclusion, you will not go wrong with either tube but for now, for these ears, the 6l6GC is the clear winner. The new Gold Lion tubes are crap to me. The modern EH version of the 6CA7 is a beam tube as is the KT77. The tube delivers all the mid punch you would expect in an EL34 but also has a top end that is more open and bright. KT 77, and KT 66 vs. Nov 7, 2006 · With JJ KT77 however, the ability to "bring back" the more rich mids is less feasible (than it is to use EL34 and get a more clear midrange sound, or get deeper lows). However, Marshall has also used 6L6 or related tubes for a long time, when EL34 supply was short. I'm not much of an el34 guy though so take that with a grain of salt. Whereas EL34 has more pronounced mid-range sound production. Amplificatore: BurnFX K45Cassa utilizzata: 2x12 con Celestion G12-M 65 CreambackMicrofoni utilizzati: Shure SM57, Sennheiser MD421, Sennheiser e906 Dec 1, 2024 · I'm rebuilding a 1958 Sansui Q-3535 and am getting to the point where I'll want to buy new output tubes. I have 2 EL84 type amplifiers in both SE and PP. The KT77 is more like an EL34 mid with more bass and top. May 31, 2019 · Learn about the history and characteristics of the EL34 and the KT77, two power tubes that are similar but have different designs. EL34 tube was designed by Mullard UK in the 1950s and produces smooth and clean output. I've heard mixed reviews on Feb 16, 2014 · JJ KT77 vs Sovtek EL34G. likewise with KT88's just more so. You will not go wrong with any of the 3. Aug 25, 2014 · The Sophia Electric EL34 tubes to me sound that much better from top to bottom. 10 to 1 I wont buy a XF2 today. The JJ E34L's provide a deeper low end and are more aggressive and punchy than an EL34. The EL34L is an EL34 with a bit more power, the KT77 is a beam power tetrode instead of a pe Jun 10, 2013 · 6CA7 vs KT77 vs EL34L sound clips. Given your choice of music, the EL34 may actually be better for you. A well-balanced EL34 amp is a delight to enjoy all day. EL34 vs. I liked the sound of the KT77's and the NOS Mullards of course but the Sophia's had that magic which just draws me in. Dec 12, 2008 · But anyway, It's an EL34 poweramp (Marshall 9005) so this is why I'm interested in 6CA7 and KT77. As mentioned the genelex KT77 are nice, the Genelex KT88 is really nice as well. Oct 20, 2013 · You can safely get 22 watts from current production KT77 and have some head room left. Set your bias Aug 18, 2008 · KT77's go in place of EL34's, not 5881/6L6's. There's been discussion about EL34s on this board and I don't think anyone is making a real Pentode EL34 at this time. KT77 has more of everything of the EL34 sonic signature. Thanks everyone. Moving toward the front, the black covered amp is an L4 Audio Note Kit amp, which had modern EL34's and now has the NOS RFT EL34's. Can the Willsenton R8 accomodate KT77 tubes? I know they can use the EL34. The KT77 is often described as a pentode because it shares the same pin configuration and bias as the EL34, but that’s inaccurate. 35 to 0. Maybe I need some different EL34s. Nov 11, 2018 · EL34 vs. The kt77's if you're ok with the spend. The EL34s both bias fine. Jan 1, 2017 · A real EL34 is a pentode tube, vs. The results may surprise youor not. 6CA7. Apr 10, 2011 · I've had Mullards, fat-bottle Sylvanias and enjoyed them - but not enough to spend tons of money for NOS anymore. Dec 10, 2014 · Tube vs Solid-State – Why Do Tubes Sound Better? January 14, 2016; The TU-8300R “Red Amp” Tour January 7, 2016; Know Your Bias January 5, 2016; Audiophile Review – EL34 Family Tube Comparison January 1, 2016; Review – Preferred Series EL34 Tube November 19, 2015; Woodland Melody October 28, 2015; Why Vinyl? October 20, 2015 Feb 20, 2011 · el34 kt77 pro Jump to Latest 6. But I had issues with the GL KT77, 3 of the 6 I bought died after 2-5 months, then one of the last 3 was not able to make bias (36 mV. The Mesa Boogie EL34 is a bit of a different animal. Watch the maximum ratings of the tubes. For what you are looking for though, you need to look at the preamp, not the power amp. kt77 tubes also are more dynamic in sound and suffer from less compression. Johan plays his 1987X through a Marshall 4×12 1960A with stock G12M25 75Hz Pulsonic Celestion Greenbacks. It is far more reliable than the JJ KT77, and even more beautiful sonically. For more information on this try searching on The National Valve Museum. The Mullards have good bass but sounded dull in my system and lacked some detail. JJ does make a regular el34 as well by the way and these are different. The speakers in the system with my Fire Bottle SEP amp are RF-7II. The EI 6CA7 vs the KT77 is a tougher call. A nice amplifier but it does offer room for improvement. KT66 Sound Signature. As a result, high-gain output made them very popular for use in guitar amplifiers, and they remain so today. My set consists of the CW4 and a Dynaco ST70 EL34 tube amplifier. My amp came with EL34's, but I swapped them for KT77 JJ's (good and inexpensive) then eventually Gold Lion Kt77's (great and somewhat more expensive). 6550 or KT88 are likely to sound more mushy than KT77 or 6CA7 at that voltage, since they were designed to run at higher voltage. His punches out his bluesy rock riffs on a Gibson SG from the Custom Shop, so quality gear used all round. KT 88? The KT 77 tube will result in a deeper and more open frequency with a clean, high-end. Not including the lower power octals like the 6V6 family which we know to be good - just those with dissipation of 18W or over Feb 15, 2007 · Easy way to look at it- KT77 is in the middle of the EL34 and 6L6. Feb 14, 2007 · They aren't night and day but the e34l is definitely more agressive and has more low end chunk than the regular el34. The thin glass tube handles lots of power, and their small size makes them a popular choice in guitar amps. My experience has not been all that great. They also don't last as long as a regular EL34. All have about 100hr on them (KT77 hours in a different amp). Feb 4, 2017 · Personally I'm not a fan of KT120s or KT150s. Bob gets a lot of questions about tubes for guitar amps, and he knows a lot about the tubes, having tried and tested them out over decades. Find out how they affect your guitar tone and how to choose the best one for your amp. KT88's were my least favorite, something weird, artificialsounding about tone color. " 6CA7 works in the same socket as the EL34, and is a beam power tetrode. 6050 and KT88 tubes. One of those arced prematurely and I got the Ruby tubes. In the same amp, the KT150 always outshines the EL34 in a big way. The sound of the KT77 is usually described as being somewhere in between an EL34 and a 6L6; they sound a little bit more compressed than 6L6s, but not as much as the EL34. I'm not really hearing out of the EL34 what others describe, at least I don't think I am. EL 34 tonal differences. Jul 24, 2024 · The reason for the bigger bottle is because the plates are bigger and shaped like a wing. Therefore, the Eastern European EL34 tubes has come a long way to make something decent when compared to its KT66 line. - EL34s have a warmer midrange, KT88s have better bass and treble. I already purchased Tung Sol 12AX-7 pre amp tubes for it and can't wait to see how those effect the tone of the amp. If I had to pick an order it would be 1-Sophia 2-NOS Mullard 3-KT77 4-KT88. So I decided to go back to EL34 native. KT77 doesn't sound as compressed as EL34 but breaks up nicely when pushed. Feb 6, 2011 · With most EL34 based amps you can run, 6L6GC, KT66, KT77, EL34, yah they all want a specific primary impedance on the output tranny to run as there designer intended but should work just fine in the amp, and some may "prefer" one as well. Produced in Russia by New Sensor. Fig 1 Apr 24, 2019 · 6L6G, 6L6GC, 7581A, EL34, EL37, 6550, KT66, KT77, KT88, KT90, KT120 I'd say I liked the KT88 over the EL34 as it seemed more "in your face", in a good way. Apr 7, 2019 · Please no other recommendations my amps can only accept basic EL34 and 6CA7 tubes due to their fixed bias, they cant accept KT77's either ive checked with the manufacturer. Aug 23, 2008 · kt77 vs. However, the KT77s do not reach the bias level suggested using the installed bias meter on the amp's top plate. Jan 21, 2010 · I have a quad of JJ EL34's in the first one and was thinking about either a quad of Mullard EL34's in the second or possibly going with the EH6CA7's. Apr 19, 2017 · The amps can run EL34, 6L6GC, 5881, 350B, KT66, KT88, 6550, KT90 and more (some tube choices require a 5U4GB rectifier tube)" KT77 vs KT88 Theme . Started by freerange fuzzwah, January 11, 2014, 01:52:36 AM. The 77 is really much closer to a 6CA7. The transconductance of the 6L6, KT66 are not similar to the KT77. The KT66 is a very linear, clear, smooth sounding tube. EL34s have a more balanced, mid-range sound. 50 each): The KT77 is not actually an EL34, but rather a beam tetrode drop-in replacement (like the American 6CA7). I have EH 6ca7 tubes that I roll in my ST70 and they're very 'solid state' sounding compared to el34's. Although KT77 is a drop-in replacement for EL34, the different design makes it a different tube altogether. Sound comparison of JJ EL34, EL34L and KT77 in a marshall jmp50W. The low end is also very tight, making it great for metal. The E34L is tighter with slightly more headroom and power with a more aggressive crunch. Consequently, the KT77 has more bottom-end and top-end sizzle than an EL34. (there are some others outputs to) When exploring the world of tube amplifiers, you’ll quickly encounter two of the most iconic power tubes often compared: the 6L6 vs EL34. Nov 10, 2024 · Which vacuum tube is the best- KT 66 vs. The KT77 has a bit more clarity and bass definition, whereas the EI is a bit warmer. Re: JJ Tesla KT77 vs EL34,E34Ls JJ KT77 has more chunk and saturation, than EL34L, definitely. Highly likely that you would need to re-bias switching from EL34 to KT77. It depends on one's taste, of course. A great tube for rhythm and solo work. Mar 8, 2007 · kt77 has different tone and about the same output as el34 about 50watts a pair. 6CA7 is the US equivilent of the EL34. The old NOS "real" Gold Lions can go for $2000/quad. 40. The Tung Sols sounded the best. KT77 has a 0. Sep 9, 2008 · I also use JJ KT77, found them very good in my Radford STA 25 III. Feb 14, 2014 · I saw older postings of using the Russian made 6P3S-E and other variants of 6L6s. JJ has re-issued this tube using a NOS KT77 to "reverse engineer" is to come as close as possible to the real thing. EL34 KT77's have a harder vacuum on them when produced. I have not tried any of the new "Mullards". Similar and terrific mid-range but the GL’s lower end was definitely tighter & deeper of the two. We agreed that I’d throw a few of my own tubes, including the Tung-Sol EL34B and Shuguang 6CA7-Zs I purchased from thetubestore. Apr 5, 2017 · As I'm new to tubes, I find it strange that for tubes in the EL34/KT77/6CA7 family, there are a big bunch around $20/tube, a few between $20 and $30, and then we go to $50 and up. Unless you're amp can take EL34's you probably can't use KT77's. It is more of a hybrid. May 18, 2022 · Only when the EL34s are in a better amp than my MP-301. ️ QUICK NAV 0:00 - What I messed up last time1:21 - What I'm doing3:08 - KT77 Clean3:50 - KT77 Dirty4:10 - 6L6GC Clean (one of them was bad 🤦🏻‍♂️)4:22 Dec 10, 2014 · The KT77 avoids this. First, I assume [correctly or incorrectly] that the 6CA7 will sound similar to EL34's? I was told long ago that the 6CA7 is like a more rugged EL34. Apr 25, 2014 · But your point still stands and is well taken -- I do also have an MDT, which is also of the EL34/6L6GC/KT77/6CA7 family of tubes, and I already like its sound, so instead of trying to make the Archon sound like the MDT, I should make sure it has a different flavor (and it does), but the goal of the tuberolling shouldn't be to make it sound Feb 11, 2019 · I was referring to hifi excluding professional equipment. The reissues, made in Russia, go for around $160-$180/quad. **Updated video here: https://youtu. In fact, I quite liked it. com over the years Aug 30, 2014 · I was never a fan of 6L6 (but I have never tried those in a Diezel). A nice tube as well. com offered a set of five EL34-type tubes for review (JJ KT77; JJ EL34 II; Svetlana EL34; Genalex Gold Lion KT77 and Mullard EL34) I jumped at the opportunity. Feb 21, 2007 · A typical high quality EL34. I changed out the kt77's in the vh4 I used to own to 6l6's and preferred it: opened up the top end, less congested overall. Completely different construction though, beam tetrode vs pentode. So it seems that Marshall isn't half as hung up on EL34 as some guitarists seem to be. Jul 22, 2018 · Also they don't bias like a EL34 so depending of the amp, it's not a swap: sometimes you need to adjust the bias range in order to get them right. Jul 2, 2015 · The 6CA7 and KT77 are common substitutes for the EL34. Plus any fairly close octal equivalents like KT66, KT77, KT120, KT150 etc. The KT77 thumps up: - more lively sound - full and thick - more top end freq. Mar 5, 2021 · In this Tone Talk / Tube Talk - Bob discusses his findings on comparing the Gold Lion KT77 tube with the JJ KT77 tube. EL34 Review Chart (View our complete selection of EL34 / 6CA7 / KT77 vacuum tubes). I read that the KT77 can be used in place of the EL34 on other amps. ). Jan 25, 2023 · EL34 vs KT77 The KT77 has higher plate impedance (23k) compared to the EL34 (15k). We also indicate top sellers for the EL34 tube type. They sound very different from EL34's as well like an EL34, 6L6 and 6550 had a child. so, if you like power amp saturation, don't go with them. 1; 2; First Prev 2 of 2 Go to page. KT 88. I did not change any settings on the amp (just Biased Power tubes) or microphone position. You can find how to do that over at AX84. Thread starter Dusty Chalk; Start date Nov 1, 2015; Prev. Great mids, smooth, airy highs, incredible bass, wonderful 3D presence, and that natural glory you'd expect in an EL34. Some folks report EL34 is sweeter in the mid range, which appeals to me. Default Jun 16, 2005 · As far as EL34 vs KT66 tube goes for the modern home audio equipment, the modern EL34 has much higher demand and longer history than the modern KT66 due to hard to find NOS EL34 mullards and Telefunkens. Using vintage "un Nov 30, 2008 · I'd also like to add that the whole EL34 == Marshall thing is rather overrated. Less than $100 a quad, bettered the KT77 GL, El34 Mullard and Tung Sol 34b. -Bill Nov 10, 2019 · If money is a concern try the Tung Sol el34's, I've heard good things about them. KT88 VS EL34 hi fi can be considered if you care about the minimal changes. But then it's not necessary good for a "normal" el34 so I had exactly this situation with the Fairchild 255A. The sound however is not typical of an EL34 or 6CA7. The EL34 has traditionally been the power amp tube in tube amplifiers from European manufacturers since the 1950s. I can't speak for modern 6CA& versions but the NOS versions sound quite different. Jan 13, 2019 · JJ KT77 ($21. be/W6Lm2R4o3dAA comparison between amp tubes at clean amp settings -- 6L6GC / 5881, 6v6, KT66, KT77, and EL34 tubes all i Mar 28, 2017 · I found the inexpensive JJ KT77 to be very good tubes. But I wanna try and get a separate EL34 for the hifi unit. Dec 17, 2009 · Totally different tube. The KT88 will demand more from your amp, so please check your owner’s manual to make sure it’s safe. Previous topic - Next topic. Its the best ones I have for guitar amps. However, at least with my setup (TriAxis and VHT2502), the EL34L is more aggressive sounding, and has wider bass. Two tubes went bad after only 300 to 400 hours of use. The KT 88 tubes are often used to make more vacuum tubes due to their great sound reproduction. This tube has been almost extinct for many years, since very few manufacturers made them. EL34 Tubes in Rock and Jazz. el34. Aug 13, 2009 · This is a EL34 amp - Holy Crap! The cleans are very impressive with the 6L6's but channel 2 is tough to use. 6L6GC vs. So that with today's line voltage you have about 430 to 440 volts on the plates (assuming most circuits used these days. I have tried KT77's and they were like a hybrid b/n EL34 and 6L6. They are still russian or Chinese. This is good news for your intended tube swaps as both the KT77 and the 6550 have the same heater current as the EL34. In many apps the difference between a pentode and a beam tetrode is trivial but in some it may not be. EL34 tubes are celebrated for their distinctively smooth midrange and crisp high end, making them a staple in the world of rock music. KT77 has a balanced and smooth texture and is an adequate premium upgrade for an EL34 amp. A swap to KT77 should be straightforward - only a bias adjustment should be needed. KT 77 vs. Two EL34 vacuum tubes are capable of producing 90 watts of power under ideal circumstances. Even though I run the bias at the nominal level of 35mA each, I like to buy rugged tubes which can handle higher if needed. I played with it some more and loved them. Jul 22, 2015 · Genalex Gold Lion KT77. In fact, they should both put out only ~20W at 400V -- same as EL34. 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 labelled EL34/6CA7, and other beam Aug 25, 2017 · I love EL34 winged C to. You're better off getting a NOS set of Mullard or Amperex EL34's. Mar 8, 2006 · The KT77 is a "super EL34" it was made specifically to be a better version of the EL34. EL34 has a lower bias of 0. The SE EL34 tubes are 3x as expensive for their top offering @ $150 a piece. (As you’ll see below, KT77 are one of the few supported output tubes I haven’t tried … tube rolling is a sickness …) However, I have tried EL34, in addition to Gold Lion KT66. Dec 10, 2023 · An EL34 and an original type 6CA7 are both pentodes. Fender Frontman 10G Guitar Amplifier can be quite useful when it comes to making music. and more range in the higher spectrum too. Some amps can have them set even a bit higher. Prefer all of the above to Shuguang EL34-B, although I can't say that they are bad. Personally,I found them to be a tighter,cleaner sounding alternative to the EL34. 50 bias. It’s definitely got a bit of a 6L6 designed into it. Entwickelt und produziert von Philips und Mullard erreicht die EL34 in den 1960er und 1970er Jahren einen Kultstatus durch die Verwendung in Gitarrenverstärkern von Jim Marshall, Hiwatt, Laney, WEM, VOX und viele mehr. com in the Core Projects/Building Blocks. Sep 19, 2019 · KT77. thetubestore. In the front is a Line Magnetic 211iA with KT77's, instead of the usual EL34's. El-34's sound good as well. My prefernce is to stick to either a EL34 or KT77 tubes. The EL34 is a true Pentode, the KT77 is a Kinkless Tetrode. That being said, I prefer the Gold Lion KT77 over my Tesla, Svetlana, RFT, VEB and Psvane (the worst) EL34s. Though the amps transformers etc should allow a bit more power with the more powerful valves the volume difference won't actually be huge. The JJ KT77 is not quite a tight as the E34L but tighter than an EL34. Not so much with EL34's Channel 2 grinds and CH3 kills, Ch4 Crazy Growl! Channel 1 seems to be the sacrafice with EL34's but you wouldn't know it unless you ran 6L6's in it first as I have done for some time. G3 is connected to pin 1 and there are no beam forming plates. Go. Mar 19, 2010 · 最近想把melody sp6的原廠EL34功率管給換掉看了下列幾個款式：1. Jan 26, 2016 · When Jon Esau of www. But, lacking any experience here, I am seeking Mar 13, 2023 · - What are the sonic characteristics of a KT77 vs the EL34/6CA7? I've been playing with different power tubes lately in my Rogue Cronus Magnum integrated and I'm curious about the KT77 types. When comparing EL34 and KT77 tubes in guitar amplifiers, you will find distinct differences in their harmonics, headroom, and frequency responses that shape the sound you produce. Shure SM57 microphone. Presently it has working EL34's of what appear to be 1988 vintage (no idea how much use is on them, but they test decent). No complaints from me, as like Techdeth, I prefer the 6l6's over the kt77's as well. aside from the tonal differences between tube models (and individual tubes, really), you get more clean headroom when using kt88/6550's. Apr 18, 2017 · This will be the 6L6GC, EL34 or KT77, depending on the plate voltage a particular amp is running. I'm forever seeking a balance of a bit of warmth/lushness with good air and detail but without any harshness. Jun 1, 2021 · KT77 should be somewhere in the middle between 6l6 and el34 and are known for a bigger low end. Be sure to check out our EL34 / 6CA7 / KT77 tube reviews page for more information regarding the sound qualities of these tubes. EL 34, KT 66 vs. Their responsive gain structure accentuates the aggressive punch and articulation that rock guitarists crave. Any decent KT88 was way better mids then a GL KT77, or JJ. Please subscribe for more demos of vintage & rare effects pedals!Today folksI've been tube shopping! :P My Hughes & Nov 1, 2020 · That depends on your definition of "auto bias" An amp that bias the el34 with cathode resistors are generally ok to substitute KT77 If it has fixed bias then the grid resistor should be < 500k if low power, < 250k if high powered. kt88/6550 is a different animal, look for a little over 80 watts a pair. It’s got a good midrange presence and highs that were exceptionally articulate. 6CA7 should also work with that amp since they're a drop in replacement for el34 but i would still confirm with KSR beforehand to be safe. Mar 4, 2011 · Owing to its' beam tetrode design the 6l6 has a far flatter plate current vs plate voltage curve than does an EL34. Check out the following tube reviews for guidance in getting the best possible tone out of your tube amp. I haven't done a live KT150 vs 300b comparison yet. Dec 22, 2021 · So the fact that he was this self disclosing about his stash of Gold Lion KT77's seemed revealing. . I added the 6550 in there since the 6CA7 has more bottom end than an EL34. Jan 8, 2023 · I have replaced the 4 EH EL34's with a matched quad of JJ KT77's. Jan 11, 2014 · EL34 vs KT77 vs 6CA7. They seem to be good for low-end and highs. Aug 8, 2023 · KT77=EL34 kinkless filament. I have tube rolled some of my amps to use 6L6, KT66, EL34 (connect pin 1), KT88 and KT77. Which I like best depends upon what mood I'm in. Statistically, they are not as dependable as the Mullard EL34 reissue. Sep 27, 2022 · You can encounter a difference in KT88 vs EL34 sound quality. Philips and Mullard in Europe and others made EL34s and Amperex and Tung Sol in the US and others made 6CA7s that are similar to EL34s. KT77 Genalex (GEC) Gold Lion4. Guitar plugged str Jan 5, 2021 · Welcome to Perky's Analog Gear Demos. Sep 19, 2010 · KT77 is very similar to the EL34 in terms of electrical characteristics. It seems that there are actually quite a bit more EL34/6CA7 brands to choose from today than say 10 years ago. May 5, 2021 · Black Ice F22 - EL34 (55w) but can run 6550/KT88 (65w) and KT120 tubes as well From my research (accepting that these are very broad characterizations) the EL34's strength is the mid-range while the KT88/6550 has more power and a broader range but maybe slightly at the expense of the EL34's excellent mid-range. Jan 30, 2020 · At the far rear, on top of the audio rack, is a Rogue Cronus Magnum (version 1), with KT-120's. The only caveats are to ensure that your power transformer can supply an extra 500ma of heater current per tube and that the range of bias voltage adjustment is correct. i have Sylvania 6L6 GBs and GCs, and Tung Sol 5881s. Low and medium power dissipation tubes are likely to be run in the more linear part of their range whereas the higher powered tubes, KT120’s and especially KT150’s, might not be quite getting the “juice” they need to sound their best. in da JSX, bring in the jj KT77 !! you get the mid grind from El34 and awesome, beefier low-end. Factory spec output tube is 6CA7 so either EL34 or KT77 may be used. The best sounding new production el34 I've tried are the JJ's followed by the new Mullards. The addition of the KT77 is especially nifty. 8K views 7 replies 5 participants last post by Toshiro Feb 21, 2011 Dec 21, 2012 · EL34 vs. Apr 24, 2011 · The EL34's are Mullard reissue with the Groove Tube label. Sounds great!!! I actually got a note back from Peter Diezel saying that with the Diezel Paul EL34's are fine, since it evidently runs at lower plate voltage than other Diezels. Grab yourself a cup of your favourite hot brew and let Johan A/B you some nice vacuum tube tones. This is from experience using both NOS versions in amps I've built. Cannot tell any difference between the JJ KT77 and GEC KT77, both very good, as are my 1960's Mullard EL34's. A modern re-creation of the legendary Genalex KT77. EL34-B (Green Base) Tung-Sol3. Try a 6CA7 in place of an EL34 for more pronounced low-end frequency response with a little more headroom. However, I have also listened to a KT120 vs 300b compa Sep 4, 2024 · I'm looking for some sonic comparisons between these much-used octal outputs wired in triode. Also if you look at the screen current it's less than the EL34 by 5mA for the same operating point which would indicate the grids are aligned unlike a EL34 being a true pentode will have non grid alignment. Particularly for me the Gold Lion KT77 variant has been a tremendous find and is my power tube of choice for my EL34 amp. Jul 17, 2018 · In the past, I have tried EL34 Mullards, EL34 Electro Harmonix and EL34B Tung Sol. Jun 23, 2017 · The transconductance of the 6CA7, EL34, and KT77 are very similar. No NOS recommendations, too much hassle. Oh btw, how does the JJ E34L compare? Mar 6, 2021 · Well, I just put my new JJ KT77's and biased it to 80mA as instructed on the PCB. Joined Dec Jan 8, 2018 · Without knowing the amp or the plate voltage, you can safely assume that a PP design (as most amps using these tubes fall within a known range here) that they expect to see for EL34 = 30 - 35 ma, KT77 = 35 - 40 ma, and KT88 = 35 - 45 ma. Oct 9, 2024 · Utter nonsense, the KT77 are a perfect substitute for EL34s where these are standard power tubes, clearly the problem lies with poor quality KT77s, or a faulty batch, these things do happen, however, carefully matched Genalex Golden Lion KT77s, if indeed these are so, are excellent tubes and obscenely expensive!, I would approach the seller for a replacement set or a refund, that would be my Sep 1, 2014 · El34's are pentodes, and are usually the ones that get credit for having that "glorious tube liquid midrange. If you do a variable cathode bias circuit you can swap out the power tube with whatever suits you 6V6 6L6 5881 KT66 KT77 EL34. Jan 1, 2016 · My experience is that the GL KT77 was the clear winner over Tung-Sol EL34 in my triode wired CJ Classic 60SE. It is possible to set separate bias on each channel though, isn't it? Because if it's not the whole thing is a moot point. I haven't tried the Chinese Treasure /Psvane tubes. Other common substitutes for EL34 vacuum tubes are 6CA7 and KT77 tubes. Nov 8, 2018 · In the power tube sockets, I've used Tungsol EL34, new Mullard EL34, Golden Lion KT88's, Tungsol KT-120/150's Tungsol KT 150's were the best blend of tonal accuracy, speed, and low bass authority. Developed and produced by Philips and Mullard, the EL34 achieved cult status in the 1960s and 1970s through its use in guitar amplifiers by Jim Marshall, Hiwatt, Laney, WEM, VOX and many more. Jan 16, 2010 · 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. Aug 22, 2008 #1 Are Kt77's Gold Lions Nos Just Like El34's Mostly Good Mids And Jan 5, 2009 · このGold Lion KT77も厚めのガラス管にきれいに封入してあります。EL34を使ったギターアンプではマイクロフォニックスが問題になる事があるので、管壁が厚いのは好ましいことなのです。オクタルベースは丈が低めの物ですが、全体の高さとしては普通のEL34と Die EL34 ist traditionell die Endstufenröhren in Röhrenverstärkern europäischer Hersteller seit den 1950er Jahren. It’s not your typical EL34 sound, but that doesn’t mean it’s bad. Nov 16, 2017 · The new RUSSIAN production power tube to beat in my system (LTA ZOTL40 AMP) is the Tung Sol 7581a (6L6 type). KT66. Jul 29, 2020 · The gold lion Kt77 aren't terribly expensive at around $50. aibxr awkyyj xusopw oruuwv elyu govps cvqh wjjs zruzbqb mqax

Kt77 vs el34. A well-balanced EL34 amp is a delight to enjoy all day.