El34 vs 6l6 pinout I guess the only way to get between the 20 watt 6V6's and the 40+ watt 6L6/el34 levels is 4 EL84's or 4 6V6's. The same headroom that delivers full range clean tones 6L6 Tubes are known for their robust power handling, typically providing up to 30 watts. 6L6 tubes have more headroom meaning they sound cleaner compared to EL34 tubes The 6L6 is easily the most versatile tube for any styles from pristine clean or jazz to mind-numbing metal and anything in between. Metlupass2 Well-known member. ) - The 7591 is a higher Transconductance tube @ 10,200 umhos (than the 6L6/6V6 etc. easy peasy, cheers,808 . Note that the information presented in this article is for reference purposes only. More Information. Gallery Archive Articles. The KT77 is my preference of the three. Still, on the duncanamps tube data page, they are not listed as close or similar. Does that tube base with that pin out have a nomenclature? 26E6 26L6 35L6 36L6 50C6 50L6 50L7 5824 5871 5881 5932 5992 5V6 6046 6550 6AG6 6AY5 6DG6 6EF6 6EY6 6EZ5 6F6 6G6 6K6 6L6 6P6S 6P3S 6U6 6V6 6W6 Each channel makes use of a single low noise tube 12AX7/6N11 at the input and proceeded by a power tube( 6L6/EL34/KT88) to accomplish power amplification. Greg. People often Title: Re: EL34 VS: 6L6/5881 Post by: Bill, KD0HG on July 08, 2008, 03:23:01 PM. I have owned a little Pico Valve that allowed the use of any octal power tube as long as the pinout was the same. (0. In this article and accompanying video we’re going to look at some of the differences EL34 pinout: Other 3 pinout: The difference between the two pinouts is how pin 1 connects to the tube. In contrast, EL34 Tubes generally output a slightly lower wattage, The difference between the two pinouts is how pin 1 connects to the tube. Put em in your ampeg adn you'll hear what it REALLY should sound like. Go. In this Blackstar Potential Lesson with Leigh Fuge of Musicteacher. Phil S. It looked original and was true to the schematic on the cab. The 6П3С-Е will work in a EL34 socket with no connexion changes. 45A) to 6L6 (0. 60% of 25 watts ( EL34) It can also be played with a pair of EL34, leaving the 2nd pair of power valves sockets empty. This website uses cookies to ensure that you get the best experience. Then all the guitar players would have a middle option between the 6V6 and 6L6 that they could try. Th 6L6 as you know is a very full and creamy sounding tube. hp = Heptode Unit. Not as warm or romantic as a Mullard XF2 EL34 but with I'm considering trading my 6L6 for an EL34, if it will give me more of that classic Marshall EL34 mojo. Amps with 6L6 tubes are generally referred to as having an American tone. I looked up the schematic for your modulator on the BAMA website and it says plate is 460 and screen is 445. What are the differences between them? Heater current is one, and bias is probably another, but are there more differences? A 1987 uses a 3400 ohm Primary for 2 EL34 or Pentod tubes that have 8 pins are often used for output tubes when making tube amplifiers. I really wanted to hear them but alas they had issues right out of the gate, so I am reluctant to buy them again. The schematic still has it's own power supply part, but it's not needed per se. Ef86's adjusted for Va=180, Vg2=140 and 370V after the shunt resistor. Moderate power, quite, can take a beating, lasts a long time and able to be sourced as NOS without a mortgage. The 6L6 were a bit darker. Probably not enough to make a huge difference. You will notice that, in all settings, EL34 is darker. 5A per tube, and a 6550 1. In a 6L6/6V6 beam tetrode type of tube, the suppressor grid is internally tied to the cathode pin 8, and pin 1 is blank. EL34/KT66/6L6 push pull pair monoblock project. 6l6's and 6550's are pretty meh in that amp. You can use 6CA7 or KT77 in place of EL34. The EL34's are just too much of a comprimise. See the 6L6 in Fig 2. The red jewel-light power indicator and metal standby and power switches complete the line-up. The other ones will be variants which operate on different voltage characteristics but have the same pinouts. In a guitar amp, this makes for a tone that is more substantial. List of tubes with same pinout as 6V6, 5881, 6W6, etc? EL34 and the like as well (where screen must be connected to cathode externally). Family wise they are closer to a 6L6 tube, I Can anybody help me figure out how to convert a tube amp that uses 2 6V6's convert to use 6CA7's or EL34's or 6L6's. Any other ideas on how to achieve this would be appreciated. For instance Randall Lynch Boxes and other 100 watt MTS amps have the ability to have a two and two tube arrangment. The lows can get muddy when pushed so if you're gonna go for 6L6's in your Marshall I suggest you choose the 6L6GC which has a slightly higher output than a regular 6L6 and will sound tighter due to its increased An EL34 amp will usually have PIN 1 and PIN 8 tied together to ground. If you can't get the bias hot enough, knock R28 down to 33k. my own experience the difference in beam vs pentode versions of the EL84-pinout family is not nearly as pronounced as 6L6 vs EL34. 6L6 @ 6mA/v) but that can vary tube-to-tube and with operating condition. The difference is pentodes have a suppressor grid (sometimes called G3), while beam power tubes do not. for example in tube slot #1 a 6L6, in #2 a EL34, in #3 a EL34 and in #4 a 6L6. Fig 2 Let's keep it simple - what difference do you hear? Same amp - same settings - same guitar. The 7189 was used in mid-line audio gear, so they can be found occasionally. Next Last. I was pretty much set on building the slightly reworked Mullard 5-20 presented on the Lundahl transformer site (see below). Like the 6L6 and 6550, 6CA7 tube has a more pronounced low end. Permalink nothing like EL34 vs 6L6. The same headroom that delivers full range clean tones simultaneously offers the same I do like 6ca7 which mimics as 6l6 in sonic signature. More Information Technical Specifications. Once the EL34 became popular in England, the American company Sylvania quickly released the 6CA7 vacuum tube. The amp is cathode biased. Thanks, Bryan The module doesn’t “know” is if it’s adjusting the bias on a 6L6, 6550, KT150 or any other tube. The EL34 has a more scooped sound often described The EL34 needs 50% more heater current, which is worth considering as you plug and play. The resistor that sets the bias range is R28. , which are Beam Tetrodes w/Transconductance in the 6000 range) and is a True Power Pentode like the EL84 (11,300 umhos), EL34 (11,000 umhos). able to take brute force better than most. EL34 sounds a bit more scooped and doesn't have the kick and sizzle of 6L6 or 6550. But then I 3- Adjust bias pot or bias circuit resistors to have more than -35 dc Volts . The 6CA7 is meant to be a replacement for the EL34, but it is an original design that imparts its influence on the resulting tone of the amplifier and is similar in sound to the 6L6 vacuum tube. H. MrDowntown EL34 tubes have a more scooped mid-range compared to 6L6 tubes. Logged spacelabstudio. OUTPUT PENDODE EL34 is an octal power tube with a maximum plate power of 25W. That's what I do on pretty much every EL37-equipped amp I have on the bench. 9A), or 6L6 to EL34 (1. Thread starter Dostradamas; Start date Mar 17, 2023; This site may earn a commission from merchant affiliate links like Ebay, Amazon, and others. But if you have a schematic for the other one it would be interesting to see what was changed to make it work. Stay connected with As far as I know it's 6L6's across the board. The output power varies from 3Wrms to 8Wrms( depending on which type of output tubes are used) and is a very good match with high efficiency ( 90dB or beyond) speakers. Think the amp needed 1000ohm screen resistors installed. They are favored in amps where headroom and clean tones are paramount. I found TWIN 5D8 schematic showing 2x 5Y3 connected in parallel working with 2x16uF @ first filter node - giving 32uF total Once the EL34 became popular in England, the American company Sylvania quickly released the 6CA7 vacuum tube. FWIW, Fender uses that blank pin 1 for a contact point for the control grid stopper. 6A), now you've doubled the current draw. Cookies & Privacy. 2. I tried 7591, 6550A, EL34, 6L6GC, 6P3S-E, 6P3S, and 6V6GTA/B. F. The 6CA7 fat bottle was derived from the 6L6 with similar beam tetrode construction. Very robust and reliable due to its internal construction. Well, a 7027(A) is basically an uprated 6L6GC with a slightly different pinout. I have been dealing with option paralysis of late and thought it would be good We sat down with our resident Tone Wizard and Laney Brand Manager, Simon Fraser-Clark to discussWhat is the difference between pre amp and Power amp tubes Re: Tonights Match: ECC83 vs 12AX7, 6L6 vs EL34 Although the Ecc83 is the european designation for the 12Ax7, there are subtile sound differences between a true 83 and the 12ax7, plus The Ecc83's are capable of handling more current that most 12ax7. Play along & leave your guess in the comments before the tubes ar Most modern amps have trim pots with a wide enough range to properly bias El34 and 6L6 along with many other octal base tube types ie; KT66. It sounds great with the 6L6 tubes that came in it stock, but I wonder what it would sound like with the EL34's. An EL34 draws 1. I never did try EL84 in triode, for some reason. They could be exchanged under certain circumstances. The Orange RV100 MKI could take EL34, 6L6 amd KT88. Joined 2010. bias voltages and pinouts. vinylkid58. EL84 tubes are used for lower wattage amps , typically in the 15 to 30 watt range, but have essentially the The EL34 is a pentode, while the 6L6 is a beam power tube. p = Pentode Unit. com we'll be looking at choosing between the EL34 and 6L6 amp plugins. 6L6's pull a little bit more heater current than 7591's. -40 to -45 would be correct for bias, so you'd crank the bias pot R29 for the correct idling current, about 100 On the EL34 and 6L6 version, we find a single tone control, followed by reverb and master volume. They They are looking for a an OT with a little bit higher primary impedance than a 6L6. EL34: Typically, an EL34 is a pentode tube known for delivering a maximum plate voltage of around 800V and output power in the range of 25 watts in class A/B amplifier circuits. Last edited: Sep 1, 2014. The 5881 schematic says to set the voltage on pin5 to -50v (UK) or -42v (USA). Quote from: tubenit on January 07, 2012, 05:55:30 pm. With that said, they’re noticeably closer compared to EL34 and 6L6. Fig 2 My Ampeg B-15R has a switch in back that allows it to run on either EL34 tubes or 6L6 tubes. Not that i get to drive the amp particularly hard nowadays to make the most of them. f. Dave. Tube manufacturers actually stuffed the same guts into On a Marshall 50w bias is around the -31 volts mark for a plate voltage of 420 volts with EL34's ,on a Fender with 6L6's your down to around -45 with a similar plate voltage , one other thing to bear in mind on the older Amplifier Conversion Guide - 6L6GC to EL34 Conversion On a sonic scale, the 6CA7 tube is a hybrid between EL34 and 6L6 tube. 6V6's pull less. 6L6 tubes are known for their clean and bright sound, without distorting nearly as much as an EL34 or EL84. Therefore, they will tend to sound similar to a 6L6. The EL34’s cathode (pin 8) and suppressor grid (pin 1, which is the EL34’s fifth element google it there are many questions about this, the pinout is almost the same except for the non connected pins, so you needs to watch the oringinal builder didnt use the non internally connected pins for any connection (which people often do). Once you convert you can not use 7027's in the amp again because you I've dug out the schematic for the SL-X. Seems warmer than the EL34. The 6L6 is a high headroom, high wattage power tube, but it has a significantly different sonic signature to the aggressive crunch tone of the EL34. 2022-08-06 2:03 am #7 2022-08-06 2:03 am #7 Ilovetubeampspete said: Keep in mind the 7591 has a DIFFERENT PINOUT than the other OCTAL socket output tubes (6L6, 6V6, 7581A, 6550 etc. With the EL34, pin 1 connects to G3, the suppressor grid. EL34 or 6L6. t = Triode Unit. It's 47k on both the 5881 and EL34 schematics so there must be enough range in there to set either one. Logged Steve_P. The pinouts are different from EL34's to 6L6's/6CA7's. Yep that's exactly what you get, and the EL34's are 25 watt tubes, the 7027's are 35 watt tubes so you get a bit less power. harddriver Well-known member. They are nice for amps that tend to burn up normal 7027's are upgraded 6l6's. El84s represent a fantastic tube for Hifi use. I went through a phase of triode-wiring beam outputs and power pentodes. In a pentode like the EL34, Pin 1 is the suppressor grid and needs to go to ground in order to do its job. 20to20. The EL34 is a real pentode (with five internal parts) and has a slight difference that’s often accounted for inside modern amps. In this episode we explore the tonal nightmare or nirvana of different tubes. Fender was fond of mounting the 1500Ω 5Y3GT. 5881/6L6GC/EL34 etc. 6V6 would be somewhat of a blend. These tubes have same pinout. A. 6L6 tubes have more headroom meaning they sound cleaner compared to EL34 tubes which sound more distorted and crunchy. 6A per tube, while a 6L6 only draws 0. I have also, as it goes for the rock players class ab1 type amps, found that el34 types versus 6l6, or 5881, tubes give a warmer dare I say 3rd harmonic warmth to the guitarist overall sound. What that means Nothing says you can't rebias and replace your 6L6s with EL34 or 6550 tubes in a JCM800 since the JCM800 was designed to use EL34/6550s. The 6N1P driver tube can be swapped with a 6DJ8 / ECC88 / E88CC. The biggest problem is that a 6550 draws much more current than a 6L6 so it could tax your output transformer and power supply unduly. Heather. EL34, 6CA7, and KT77 are all drop-in replacements for each other. Hello Everyone, Sorry to post what may be something of an opinion-poll type thread. 6L6 and EL34, both popular power valves for guitar amps, but what is the sonic difference between the two?Here I take a Bugera 333 loaded with 6L6s and swap the closest marshall ever came to having an amp with 6l6 tubes from factory was in the later jcm 900's when marshall switched from el34 to 5881 tubes due to availability of el34 tubes at that time, also the jtm 30 and jtm60 models that they made for a few yrs in mid 90's had 5881 for usa market models at least. Instead, EL34 accentuates the upper mids that break up smoothly In my experience with a Komet 60, 6L6's leaned the amp in the Fender direction for better/tighter cleans; whereas EL34's leaned the amp in the Marshall direction with a little grind to them when pushed. With the former configuration, the suppressor grid will be at the same voltage of the cathode, and with the latter, it will be at ground, correct? Please help me understand this. . And have same unused pins. The quick answer to the difference between EL34 vs 6CA7 or EL34 vs KT77 is simple. A friend lent me a pair of NOS GEC KT88 and the amp sounded really great! How similar are 6L6 and KT66 tubes? The pins are similar, and the ratings are pretty close. In regards to the thread. Otherwise, the pinouts are exactly the same. 1 of 3 Go to page. Do I connect pin 1 and 8 at the base or do I run pin 1 direct to its own ground. Plus I play heavy heavy stuff, I like having those highs and lows. Jul 9, 2021 #15 I really thought the JJ6CA7 is a gorgeously built tube, the glass envelope is extremely thick and the internals looked great. You can swap the KT88 output tubes with 6L6, or EL34 / 6CA7. Looking over the KT88 version, we find an almost identical array, but for the inclusion of an ISF control in place of the tone knob. The EL34 has the suppressor grid separately wired out, to pin 1. The main thing here, is that the power transformer has to cater for whatever current draw the power valves will want, and the output transformer needs to be capable to cope with the outputs required. Maybe I'll do a 4 6V6 and see how it works. I switch the voltage adjusting resistor for 6v6 vs 6l6 tubes and also change the rectifier for the different power tube. JCM800 50 watts schematic show -57 volts Put tubes in; 4- Read tubes plate current ma or mv and adjust bias for the right tubes power dissipation. All one has to do, is to wire pin 1 to pin 8 on the tube socket, and the EL37 and EL34 become completely interchangeable, in practice. Hey, I'm Heather. I TrAnsfer ChArACTerisTiCs pLATe ChArACTerisTiCs a. As well as just capturi The EL34 were pretty aggressive. Member. To my ears, back in my Music Man amp days, 6CA7's are somewhere in between 6L6's & El34's but sounded closer to 6L6's to me. SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. The 6L6 has a warm, full-bodied tone that’s well-suited for blues, country, and soft rock. This is a unique I'd like to be able to swap in 6L6/6CA7/EL34. output pentode 1( ) ()-60 -40 -20 0 0 100 200 300 0 200 300 400 500 EL34 EL34 The 6V6, 6L6, KT66, KT88, and 6550 tubes are all beam tetrodes (with four internal parts) and have identical pinouts. 6L6 and EL34 tubes produce radically different sounds. davidro Lunatic Member. Maybe they have used EL34's, but it's not public. The 6550 would need to have the tube pinout wired as an EL34 would be. 2007-04-06 01:12:31 UTC. In today's video, we're comparing the sounds of a few different tube amps, using a Two Notes Captor to capture the sound of each head. Nov 14, 2020 #2 The blue channel on the 6L6 is much preferred by lots of people even so much that they mod the EL34 blue channel to sound like the 6L6 blue channel. diyAudio Community diyAudio Store. Theme - Light; YYYY-MM-DD / 12-hour clock; Contact us; Terms and rules; el34 vs 6ca7. EL34 Vs 6V6: How Do They Compare? These days, the whole American and British division is a bit outdated. For example, judged according to plate characteristic curves 6L6 tubes generally overdrives harsher than a EL34 tubes. This would also suggest that maximum cathode emission is a fair bit higher for the EL34 tubes have a more scooped mid-range compared to 6L6 tubes. It’s revered for its harmonic VHT Special 6 Ultra 6V6 vs 6L6 vs EL34 vs EL84 Power Tubes. Subscriber. hx = Hexode Unit. Nice cleans. Joined The 6L6 is less 'forward-sounding' than a British tube like the EL34, yet in return you get a very sparkly tube with bell-like highs. I had someone mod an old Peavey XXX to accept the JJE34L. I have tried Siemens EL34 and new production tubes JJ EL34 and Electro-Harmonix EL34EH. 5A) or 6550 (1. However, the differences between amps that come with EL34 and 6V6 tubes are different. Pin 1 is not connected to anything on a 6L6 beam tetrode (unless you have an old metal can tube), so you can use it anyway you want. But if the EL34 amp uses a lot of negative feedback and is fixed bias while the 6L6 amp has no feedback loop and is cathode biased the 6L6 might actually behave more like a traditional EL34 amp and vice versa. Antique Electronic Supply makes no claims, promises, or guarantees about the accuracy, completeness, or adequacy of the contents of this article, and expressly disclaims liability for errors or omissions on the part of the author. EL34 amps are more likely to be able to be converted to 6550s than 6L6 amps due to the differences in the current draw for the heaters. Data sheet says the tubes have a little more Gm than 6L6's (7mA/v vs. onemug AK Subscriber. Many other tube types are available of course, but the two most common tube types you’ll see out there are the EL34 and the 6L6. The 6L6GCs would be a very good match. 9A per tube. Thread starter onemug; Start date Sep 27, 2015; 1; 2; 3; Next. Last edited: 2016-03-31 7:20 pm 6L6 Author: RCA Subject: FP-1999-02-28 Created Date: 2/24/2002 7:46:40 PM If I were you, I'd get some to be a replacement pair of "6L6's". The 6L6 will sound slightly rounder compared to the EL34 which will sound smoother. With the other 3, pin 1 either has no In general, EL34 and 6L6 tubes are typically used in higher wattage applications, usually amps that are over 50 watts. I have decided to build a Push-Pull amp based on either 6L6GCs or El34s. Sep 1, 2014 a beam confining electrode and a cathode. I can't justify taking my clean channel down a notch just to get a Marshally crunch. I started playing an The 6L6 tube is generally regarded as the “American” cousin to the EL34 tube. I did find differences The 6L6 is easily the most versatile tube for any styles from pristine clean for jazz to mind-numbing metal and anything in between. EL34 tubes sound darker and heavier whereas 6L6 tubes sound brighter and fuller. I So apparently I can use EL34, 6CA7, KT77, KT66 type tubes for my new Push-Pull. Level 2; If JJ was smart, they would issue a version of their 7591 with a standard pinout. ouxnwzoudanuiwtghdemenohlfhshzvpyxnsxjpbzrvbjfggrdyhjwhqhwgcsjgjvunkxkbmhsgwiwkzk
El34 vs 6l6 pinout I guess the only way to get between the 20 watt 6V6's and the 40+ watt 6L6/el34 levels is 4 EL84's or 4 6V6's. The same headroom that delivers full range clean tones 6L6 Tubes are known for their robust power handling, typically providing up to 30 watts. 6L6 tubes have more headroom meaning they sound cleaner compared to EL34 tubes The 6L6 is easily the most versatile tube for any styles from pristine clean or jazz to mind-numbing metal and anything in between. Metlupass2 Well-known member. ) - The 7591 is a higher Transconductance tube @ 10,200 umhos (than the 6L6/6V6 etc. easy peasy, cheers,808 . Note that the information presented in this article is for reference purposes only. More Information. Gallery Archive Articles. The KT77 is my preference of the three. Still, on the duncanamps tube data page, they are not listed as close or similar. Does that tube base with that pin out have a nomenclature? 26E6 26L6 35L6 36L6 50C6 50L6 50L7 5824 5871 5881 5932 5992 5V6 6046 6550 6AG6 6AY5 6DG6 6EF6 6EY6 6EZ5 6F6 6G6 6K6 6L6 6P6S 6P3S 6U6 6V6 6W6 Each channel makes use of a single low noise tube 12AX7/6N11 at the input and proceeded by a power tube( 6L6/EL34/KT88) to accomplish power amplification. Greg. People often Title: Re: EL34 VS: 6L6/5881 Post by: Bill, KD0HG on July 08, 2008, 03:23:01 PM. I have owned a little Pico Valve that allowed the use of any octal power tube as long as the pinout was the same. (0. In this article and accompanying video we’re going to look at some of the differences EL34 pinout: Other 3 pinout: The difference between the two pinouts is how pin 1 connects to the tube. In contrast, EL34 Tubes generally output a slightly lower wattage, The difference between the two pinouts is how pin 1 connects to the tube. Put em in your ampeg adn you'll hear what it REALLY should sound like. Go. In this Blackstar Potential Lesson with Leigh Fuge of Musicteacher. Phil S. It looked original and was true to the schematic on the cab. The 6П3С-Е will work in a EL34 socket with no connexion changes. 45A) to 6L6 (0. 60% of 25 watts ( EL34) It can also be played with a pair of EL34, leaving the 2nd pair of power valves sockets empty. This website uses cookies to ensure that you get the best experience. Then all the guitar players would have a middle option between the 6V6 and 6L6 that they could try. Th 6L6 as you know is a very full and creamy sounding tube. hp = Heptode Unit. Not as warm or romantic as a Mullard XF2 EL34 but with I'm considering trading my 6L6 for an EL34, if it will give me more of that classic Marshall EL34 mojo. Amps with 6L6 tubes are generally referred to as having an American tone. I looked up the schematic for your modulator on the BAMA website and it says plate is 460 and screen is 445. What are the differences between them? Heater current is one, and bias is probably another, but are there more differences? A 1987 uses a 3400 ohm Primary for 2 EL34 or Pentod tubes that have 8 pins are often used for output tubes when making tube amplifiers. I really wanted to hear them but alas they had issues right out of the gate, so I am reluctant to buy them again. The schematic still has it's own power supply part, but it's not needed per se. Ef86's adjusted for Va=180, Vg2=140 and 370V after the shunt resistor. Moderate power, quite, can take a beating, lasts a long time and able to be sourced as NOS without a mortgage. The 6L6 were a bit darker. Probably not enough to make a huge difference. You will notice that, in all settings, EL34 is darker. 5A per tube, and a 6550 1. In a 6L6/6V6 beam tetrode type of tube, the suppressor grid is internally tied to the cathode pin 8, and pin 1 is blank. EL34/KT66/6L6 push pull pair monoblock project. 6l6's and 6550's are pretty meh in that amp. You can use 6CA7 or KT77 in place of EL34. The EL34's are just too much of a comprimise. See the 6L6 in Fig 2. The red jewel-light power indicator and metal standby and power switches complete the line-up. The other ones will be variants which operate on different voltage characteristics but have the same pinouts. In a guitar amp, this makes for a tone that is more substantial. List of tubes with same pinout as 6V6, 5881, 6W6, etc? EL34 and the like as well (where screen must be connected to cathode externally). Family wise they are closer to a 6L6 tube, I Can anybody help me figure out how to convert a tube amp that uses 2 6V6's convert to use 6CA7's or EL34's or 6L6's. Any other ideas on how to achieve this would be appreciated. For instance Randall Lynch Boxes and other 100 watt MTS amps have the ability to have a two and two tube arrangment. The lows can get muddy when pushed so if you're gonna go for 6L6's in your Marshall I suggest you choose the 6L6GC which has a slightly higher output than a regular 6L6 and will sound tighter due to its increased An EL34 amp will usually have PIN 1 and PIN 8 tied together to ground. If you can't get the bias hot enough, knock R28 down to 33k. my own experience the difference in beam vs pentode versions of the EL84-pinout family is not nearly as pronounced as 6L6 vs EL34. 6L6 @ 6mA/v) but that can vary tube-to-tube and with operating condition. The difference is pentodes have a suppressor grid (sometimes called G3), while beam power tubes do not. for example in tube slot #1 a 6L6, in #2 a EL34, in #3 a EL34 and in #4 a 6L6. Fig 2 Let's keep it simple - what difference do you hear? Same amp - same settings - same guitar. The 7189 was used in mid-line audio gear, so they can be found occasionally. Next Last. I was pretty much set on building the slightly reworked Mullard 5-20 presented on the Lundahl transformer site (see below). Like the 6L6 and 6550, 6CA7 tube has a more pronounced low end. Permalink nothing like EL34 vs 6L6. The same headroom that delivers full range clean tones simultaneously offers the same I do like 6ca7 which mimics as 6l6 in sonic signature. More Information Technical Specifications. Once the EL34 became popular in England, the American company Sylvania quickly released the 6CA7 vacuum tube. The amp is cathode biased. Thanks, Bryan The module doesn’t “know” is if it’s adjusting the bias on a 6L6, 6550, KT150 or any other tube. The EL34 has a more scooped sound often described The EL34 needs 50% more heater current, which is worth considering as you plug and play. The resistor that sets the bias range is R28. , which are Beam Tetrodes w/Transconductance in the 6000 range) and is a True Power Pentode like the EL84 (11,300 umhos), EL34 (11,000 umhos). able to take brute force better than most. EL34 sounds a bit more scooped and doesn't have the kick and sizzle of 6L6 or 6550. But then I 3- Adjust bias pot or bias circuit resistors to have more than -35 dc Volts . The 6CA7 is meant to be a replacement for the EL34, but it is an original design that imparts its influence on the resulting tone of the amplifier and is similar in sound to the 6L6 vacuum tube. H. MrDowntown EL34 tubes have a more scooped mid-range compared to 6L6 tubes. Logged spacelabstudio. OUTPUT PENDODE EL34 is an octal power tube with a maximum plate power of 25W. That's what I do on pretty much every EL37-equipped amp I have on the bench. 9A), or 6L6 to EL34 (1. Thread starter Dostradamas; Start date Mar 17, 2023; This site may earn a commission from merchant affiliate links like Ebay, Amazon, and others. But if you have a schematic for the other one it would be interesting to see what was changed to make it work. Stay connected with As far as I know it's 6L6's across the board. The output power varies from 3Wrms to 8Wrms( depending on which type of output tubes are used) and is a very good match with high efficiency ( 90dB or beyond) speakers. Think the amp needed 1000ohm screen resistors installed. They are favored in amps where headroom and clean tones are paramount. I found TWIN 5D8 schematic showing 2x 5Y3 connected in parallel working with 2x16uF @ first filter node - giving 32uF total Once the EL34 became popular in England, the American company Sylvania quickly released the 6CA7 vacuum tube. FWIW, Fender uses that blank pin 1 for a contact point for the control grid stopper. 6A), now you've doubled the current draw. Cookies & Privacy. 2. I tried 7591, 6550A, EL34, 6L6GC, 6P3S-E, 6P3S, and 6V6GTA/B. F. The 6CA7 fat bottle was derived from the 6L6 with similar beam tetrode construction. Very robust and reliable due to its internal construction. Well, a 7027(A) is basically an uprated 6L6GC with a slightly different pinout. I have been dealing with option paralysis of late and thought it would be good We sat down with our resident Tone Wizard and Laney Brand Manager, Simon Fraser-Clark to discussWhat is the difference between pre amp and Power amp tubes Re: Tonights Match: ECC83 vs 12AX7, 6L6 vs EL34 Although the Ecc83 is the european designation for the 12Ax7, there are subtile sound differences between a true 83 and the 12ax7, plus The Ecc83's are capable of handling more current that most 12ax7. Play along & leave your guess in the comments before the tubes ar Most modern amps have trim pots with a wide enough range to properly bias El34 and 6L6 along with many other octal base tube types ie; KT66. It sounds great with the 6L6 tubes that came in it stock, but I wonder what it would sound like with the EL34's. An EL34 draws 1. I never did try EL84 in triode, for some reason. They could be exchanged under certain circumstances. The Orange RV100 MKI could take EL34, 6L6 amd KT88. Joined 2010. bias voltages and pinouts. vinylkid58. EL84 tubes are used for lower wattage amps , typically in the 15 to 30 watt range, but have essentially the The EL34 is a pentode, while the 6L6 is a beam power tube. p = Pentode Unit. com we'll be looking at choosing between the EL34 and 6L6 amp plugins. 6L6's pull a little bit more heater current than 7591's. -40 to -45 would be correct for bias, so you'd crank the bias pot R29 for the correct idling current, about 100 On the EL34 and 6L6 version, we find a single tone control, followed by reverb and master volume. They They are looking for a an OT with a little bit higher primary impedance than a 6L6. EL34: Typically, an EL34 is a pentode tube known for delivering a maximum plate voltage of around 800V and output power in the range of 25 watts in class A/B amplifier circuits. Last edited: Sep 1, 2014. The 5881 schematic says to set the voltage on pin5 to -50v (UK) or -42v (USA). Quote from: tubenit on January 07, 2012, 05:55:30 pm. With that said, they’re noticeably closer compared to EL34 and 6L6. Fig 2 My Ampeg B-15R has a switch in back that allows it to run on either EL34 tubes or 6L6 tubes. Not that i get to drive the amp particularly hard nowadays to make the most of them. f. Dave. Tube manufacturers actually stuffed the same guts into On a Marshall 50w bias is around the -31 volts mark for a plate voltage of 420 volts with EL34's ,on a Fender with 6L6's your down to around -45 with a similar plate voltage , one other thing to bear in mind on the older Amplifier Conversion Guide - 6L6GC to EL34 Conversion On a sonic scale, the 6CA7 tube is a hybrid between EL34 and 6L6 tube. 6V6's pull less. 6L6 tubes are known for their clean and bright sound, without distorting nearly as much as an EL34 or EL84. Therefore, they will tend to sound similar to a 6L6. The EL34’s cathode (pin 8) and suppressor grid (pin 1, which is the EL34’s fifth element google it there are many questions about this, the pinout is almost the same except for the non connected pins, so you needs to watch the oringinal builder didnt use the non internally connected pins for any connection (which people often do). Once you convert you can not use 7027's in the amp again because you I've dug out the schematic for the SL-X. Seems warmer than the EL34. The 6L6 is a high headroom, high wattage power tube, but it has a significantly different sonic signature to the aggressive crunch tone of the EL34. 2022-08-06 2:03 am #7 2022-08-06 2:03 am #7 Ilovetubeampspete said: Keep in mind the 7591 has a DIFFERENT PINOUT than the other OCTAL socket output tubes (6L6, 6V6, 7581A, 6550 etc. With the EL34, pin 1 connects to G3, the suppressor grid. EL34 or 6L6. t = Triode Unit. It's 47k on both the 5881 and EL34 schematics so there must be enough range in there to set either one. Logged Steve_P. The pinouts are different from EL34's to 6L6's/6CA7's. Yep that's exactly what you get, and the EL34's are 25 watt tubes, the 7027's are 35 watt tubes so you get a bit less power. harddriver Well-known member. They are nice for amps that tend to burn up normal 7027's are upgraded 6l6's. El84s represent a fantastic tube for Hifi use. I went through a phase of triode-wiring beam outputs and power pentodes. In a pentode like the EL34, Pin 1 is the suppressor grid and needs to go to ground in order to do its job. 20to20. The EL34 is a real pentode (with five internal parts) and has a slight difference that’s often accounted for inside modern amps. In this episode we explore the tonal nightmare or nirvana of different tubes. Fender was fond of mounting the 1500Ω 5Y3GT. 5881/6L6GC/EL34 etc. 6V6 would be somewhat of a blend. These tubes have same pinout. A. 6L6 tubes have more headroom meaning they sound cleaner compared to EL34 tubes which sound more distorted and crunchy. 6A per tube, while a 6L6 only draws 0. I have also, as it goes for the rock players class ab1 type amps, found that el34 types versus 6l6, or 5881, tubes give a warmer dare I say 3rd harmonic warmth to the guitarist overall sound. What that means Nothing says you can't rebias and replace your 6L6s with EL34 or 6550 tubes in a JCM800 since the JCM800 was designed to use EL34/6550s. The 6N1P driver tube can be swapped with a 6DJ8 / ECC88 / E88CC. The biggest problem is that a 6550 draws much more current than a 6L6 so it could tax your output transformer and power supply unduly. Heather. EL34, 6CA7, and KT77 are all drop-in replacements for each other. Hello Everyone, Sorry to post what may be something of an opinion-poll type thread. 6L6 and EL34, both popular power valves for guitar amps, but what is the sonic difference between the two?Here I take a Bugera 333 loaded with 6L6s and swap the closest marshall ever came to having an amp with 6l6 tubes from factory was in the later jcm 900's when marshall switched from el34 to 5881 tubes due to availability of el34 tubes at that time, also the jtm 30 and jtm60 models that they made for a few yrs in mid 90's had 5881 for usa market models at least. Instead, EL34 accentuates the upper mids that break up smoothly In my experience with a Komet 60, 6L6's leaned the amp in the Fender direction for better/tighter cleans; whereas EL34's leaned the amp in the Marshall direction with a little grind to them when pushed. With the former configuration, the suppressor grid will be at the same voltage of the cathode, and with the latter, it will be at ground, correct? Please help me understand this. . And have same unused pins. The quick answer to the difference between EL34 vs 6CA7 or EL34 vs KT77 is simple. A friend lent me a pair of NOS GEC KT88 and the amp sounded really great! How similar are 6L6 and KT66 tubes? The pins are similar, and the ratings are pretty close. In regards to the thread. Otherwise, the pinouts are exactly the same. 1 of 3 Go to page. Do I connect pin 1 and 8 at the base or do I run pin 1 direct to its own ground. Plus I play heavy heavy stuff, I like having those highs and lows. Jul 9, 2021 #15 I really thought the JJ6CA7 is a gorgeously built tube, the glass envelope is extremely thick and the internals looked great. You can swap the KT88 output tubes with 6L6, or EL34 / 6CA7. Looking over the KT88 version, we find an almost identical array, but for the inclusion of an ISF control in place of the tone knob. The EL34 has the suppressor grid separately wired out, to pin 1. The main thing here, is that the power transformer has to cater for whatever current draw the power valves will want, and the output transformer needs to be capable to cope with the outputs required. Maybe I'll do a 4 6V6 and see how it works. I switch the voltage adjusting resistor for 6v6 vs 6l6 tubes and also change the rectifier for the different power tube. JCM800 50 watts schematic show -57 volts Put tubes in; 4- Read tubes plate current ma or mv and adjust bias for the right tubes power dissipation. All one has to do, is to wire pin 1 to pin 8 on the tube socket, and the EL37 and EL34 become completely interchangeable, in practice. Hey, I'm Heather. I TrAnsfer ChArACTerisTiCs pLATe ChArACTerisTiCs a. As well as just capturi The EL34 were pretty aggressive. Member. To my ears, back in my Music Man amp days, 6CA7's are somewhere in between 6L6's & El34's but sounded closer to 6L6's to me. SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. d = Diode Unit. The 6L6 has a warm, full-bodied tone that’s well-suited for blues, country, and soft rock. This is a unique I'd like to be able to swap in 6L6/6CA7/EL34. output pentode 1( ) ()-60 -40 -20 0 0 100 200 300 0 200 300 400 500 EL34 EL34 The 6V6, 6L6, KT66, KT88, and 6550 tubes are all beam tetrodes (with four internal parts) and have identical pinouts. 6L6 and EL34 tubes produce radically different sounds. davidro Lunatic Member. Maybe they have used EL34's, but it's not public. The 6550 would need to have the tube pinout wired as an EL34 would be. 2007-04-06 01:12:31 UTC. In today's video, we're comparing the sounds of a few different tube amps, using a Two Notes Captor to capture the sound of each head. Nov 14, 2020 #2 The blue channel on the 6L6 is much preferred by lots of people even so much that they mod the EL34 blue channel to sound like the 6L6 blue channel. diyAudio Community diyAudio Store. Theme - Light; YYYY-MM-DD / 12-hour clock; Contact us; Terms and rules; el34 vs 6ca7. EL34 Vs 6V6: How Do They Compare? These days, the whole American and British division is a bit outdated. For example, judged according to plate characteristic curves 6L6 tubes generally overdrives harsher than a EL34 tubes. This would also suggest that maximum cathode emission is a fair bit higher for the EL34 tubes have a more scooped mid-range compared to 6L6 tubes. It’s revered for its harmonic VHT Special 6 Ultra 6V6 vs 6L6 vs EL34 vs EL84 Power Tubes. Subscriber. hx = Hexode Unit. Nice cleans. Joined The 6L6 is less 'forward-sounding' than a British tube like the EL34, yet in return you get a very sparkly tube with bell-like highs. I had someone mod an old Peavey XXX to accept the JJE34L. I have tried Siemens EL34 and new production tubes JJ EL34 and Electro-Harmonix EL34EH. 5A) or 6550 (1. However, the differences between amps that come with EL34 and 6V6 tubes are different. Pin 1 is not connected to anything on a 6L6 beam tetrode (unless you have an old metal can tube), so you can use it anyway you want. But if the EL34 amp uses a lot of negative feedback and is fixed bias while the 6L6 amp has no feedback loop and is cathode biased the 6L6 might actually behave more like a traditional EL34 amp and vice versa. Antique Electronic Supply makes no claims, promises, or guarantees about the accuracy, completeness, or adequacy of the contents of this article, and expressly disclaims liability for errors or omissions on the part of the author. EL34 amps are more likely to be able to be converted to 6550s than 6L6 amps due to the differences in the current draw for the heaters. Data sheet says the tubes have a little more Gm than 6L6's (7mA/v vs. onemug AK Subscriber. Many other tube types are available of course, but the two most common tube types you’ll see out there are the EL34 and the 6L6. The 6L6GCs would be a very good match. 9A per tube. Thread starter onemug; Start date Sep 27, 2015; 1; 2; 3; Next. Last edited: 2016-03-31 7:20 pm 6L6 Author: RCA Subject: FP-1999-02-28 Created Date: 2/24/2002 7:46:40 PM If I were you, I'd get some to be a replacement pair of "6L6's". The 6L6 will sound slightly rounder compared to the EL34 which will sound smoother. With the other 3, pin 1 either has no In general, EL34 and 6L6 tubes are typically used in higher wattage applications, usually amps that are over 50 watts. I have decided to build a Push-Pull amp based on either 6L6GCs or El34s. Sep 1, 2014 a beam confining electrode and a cathode. I can't justify taking my clean channel down a notch just to get a Marshally crunch. I started playing an The 6L6 tube is generally regarded as the “American” cousin to the EL34 tube. I did find differences The 6L6 is easily the most versatile tube for any styles from pristine clean for jazz to mind-numbing metal and anything in between. EL34 tubes sound darker and heavier whereas 6L6 tubes sound brighter and fuller. I So apparently I can use EL34, 6CA7, KT77, KT66 type tubes for my new Push-Pull. Level 2; If JJ was smart, they would issue a version of their 7591 with a standard pinout. ouxnw zouda nuiwt ghdeme nohl fhshzvp yxnsxj pbzrv bjfgg rdyhjw hqhwgc sjgjvu nkxk bmhsgw iwkzk