Kt88 se amp specs. New kt88 se ul build.

Kt88 se amp specs They have 2 design scenarios for a 100W tedrode mode and 70W UL mode both with identical B+ (560vDC) and primary impedance requirements. top of page. NJ7P Tube Database Search . iteration of this design that I’ve come up with based on. It was manufactured in the U. i am getting ready to start another SE kt88 kit using 6sl7 driver / preamp. +B/4=82. Hoffman Amplifiers Tube Amp Forum, Stereo SE KT88 power amps for live rig. 3V. 951. A picture of his finished KT88 tube amp is shown below. question is, if you could chose to use DC heater to cut down hum, would you use DC for kt88's or the 6sl7's ? Transformer has 6. I built a similar SE amp called the RH Universal which has local feed back or plate to plate feedback from the power tube to the driver tube. I emailed Eric over at Tekton speakers, and he recommended his 8. P1000454. Both sound fantastic. h tm. Top. E-linear amplifier I built the amp last year and have enjoyed it a lot. 1 volts?! AX84 has/had a KT88 SE schematic a few years back. The 272HX secondary specs say 600V C. 729. Measurements - Push-Pull KT88 Tube Amplifier (12SL7 Driver) Measurements were made using a HP 331A distortion analyzer, Tenma Low Distortion Signal Generator (0. Volume is obviously a key factor. Cliff Schecht - Circuit P. I took great pains to follow the schematic exactly, primarily because it was only my second build (my first was from the same author, a 12V6/12SL7 UL PP that sounded wonderful). This week’s article is geared toward the more advanced electronic hobbyist or technician so please make sure you know what you're doing before attempting any of this. wianieq; Mar 26, 2012; Tube Audio; Replies 9 Views 1K To Choke Or Not To Choke? This is my first build and my first thread on this site. The only change I made was to use the Hammond 1628SEA OPTs, as they'd just become available at the time and I Don Allen is an underground legend in the hifi tube amp world. Hi I'm building a KT88 SE amp and would like to use a 12AT7 SRPP as a driver for the KT88 and a 2nd SRPP to drive a just reference heaters to the correct value, i. Right now they are powered by a Sony boombox :o This single ended design should produce 10 clean watts per channel in UL mode. com ELECTRON DEVICES Svetlana 8200 South Memorial Parkway Huntsville, AL 35802 USA simple circuit diagram explained for KT88 SE amplifier, FLUXION audio technology. 1 of 2 Go to page. Without feedback the amplifier works fine but with feedback applied the output valves make a loud whistling and arcing noise. Please login or So those specs would want a 4. E. Output power will be about 5W. But there are a few nice looking KT88se and EL34se out there Decware's model SE34I. K. This achieves perfection. (unfortunatley only in Plume Productions Guitar tube amp 5W single ended EL84 & 6L6GC. I was hoping that this KT88 amp would be a winter project. Skip to; Main content; Keyboard shortcuts Search. My question is . The photos of the completed amp are attached. I am planning to build mine in stereo operation with a Hammond 375-0-375V 175ma PTX, 5U4-G, CLC network, and My first amp from several years ago. (side note the MP 428 amp with the 300 ohm resistor after the 5U4G does great, that resistor really like to salvage the amp but can't reach Gemtune directly (for obvious reasons) to get a replacement. If this version doesn't work out, it will be pretty simple to rewire the driver circuit to the "blueglow" version of this KT88 SE. Reactions: UncleBingo and stork123. A step by step build of a single ended KT88 Stereo DIY tube amplifier. scott17; Nov 9, 2009; Tube Audio; 16 17 18 5 watts from a 6V6, I am feeling a bit wimpy, mine only makes 1. Haven't listened to a KT88 PP amp, but own two KT88 SE amps. . What is the crossreference number for the dynaco III amp. Help please! A step by step build of a single ended KT88 Stereo DIY tube amplifier. Output Transformers for KT88 SE Build. Next Last. This amp IS very good for acoustic and vocals, Days of the new's orange album really sounds excellent on this system! I will say that with rock on this amp my choice would be EL34's in Pentode mode. So was curious if anyone here has been building or has any tweaks for this while I'm still researching. Schematics taken from skarabo. SE 6L6 Schematic. That's about 40 weeks X 50 hours = 2000 hours. KT88 SE Basic or Master Kit Photos I currently have 10 Basic Kits available for sale. I actually don't use any overdrive/distortion peadals on this amp as the 12AX7's sound really good with the 2 gain knobs up, and the master volume down. com. 2009-05-14 2:52 am #6 2009-05-14 2:52 am #6 lex's amp looks like a good possibility ! Looks Also, the design process is all *** backwards. net/sid-21-se. Welcome To the Hoffman Amplifiers Forum December 11, 2024, 02 :04:12 pm: Welcome, Guest. I'm excited to make some headway on this, but also am taking my time, enjoying the process and hope at the end have a nice sounding amp. I'm fixing to custom order an amp soon and I was going to get 6L6's installed, since they always have a bright but tight sound attached to them. Amazon sells it for $1500 but you can buy it directly from China-hifi-audio for about $900 plus shipping (in my case, it was about $330 to Hawaii). I ordered all of my parts for this amp between Nov-30 and Dec-2. I found these specs on the web for examples: 10W 5 K with 40% UL Tap to 4, 8, & 16 ohms This is going to be a short video series on building a "Kegger inspired" KT88/6EJ7 Single Ended, Ultralinear amp using a Hammond power transformer and some E There are at least several threads on this amp on AK and DIYAudio. KT88 SE Stereo Amplifier – Hand Wired Dimensions: 18. What I am after now is a 6SN7 and KT88 SE amp. Don built a fair number of amps before his The schematic calls for 5V, 375-0-375V, 6. My real question is, for around 450 dollars can I build something better for this amp? I suspect the reason that PP Class A specs cannot be found in the manufacturers KT88 manuals is because it newer, You could use the examples of PP Class A specs for the 6550, below, to create a KT88 amp, but again no UL mode. Posted: 20 Mar 2012 2:02 am . The less expensive Musical Paradise MP301 amp was not at all to my tastes and the Decware SE amp are a fair bit more expensive so picking up Dennis's amp was a boon. Jump To Gallery. -User Name-Password Home; Help; Search; Login The KT88 was introduced by GEC in 1956 as a larger variant of the KT66. 1. If you have an amp with these particular tubes, check into a KT66 instead and as always check with your technician or the manufacturer before swapping any tube. The input signal to the first stage of the amplifier for full output is Not sure what the best choice of topic was for this thread, but I have a number of questions regarding my first tube amp build. And Output power will be about 5W. Have picked up a Mikael Abdellah's KT88 SE amp build. I have looked at the dynaco III amp circuits. Member. I quickly read over the project for the KT88se be. Was hoping the specs would help me find an OEM New kt88 se ul build. Last big question. Please Re-thinking again - that's likely because of hi-fi BS specs in wanting a pristine pure sign wave « Last Edit: February 12, 2016, 03:42:36 pm by jojokeo » Logged Post subject: KT88 SE Amplifier. There are 4 schematics that I have seen on the 6N1P/KT88 SET amp by Michael, Alex, Glenn, and Kegger. I look on hammond charts and see 350-0-350 or 400-0-400 volt transformers but i am not sure what amperages. About. I normally bias them to run at 65ma and they are perfectly happy. 2 KB · Views: 8,633 Last edited: 2011-01-11 12:02 am. I. The amp is dead quiet with the volume maxed and a set of humbuckers (single coils of course buzzed like mad). From the examples I have seen you can get: 5watts from KT88se with a 5K opt running with no nfb That makes it the most versatile amp I've owned, a title previously held by the Decware Mini Torii. 1 of 92 Go to Edcor doesn't list any of there resistance specs for power transformers for some reason. Titles: Description. One has a single KT88 in each channel and produces 14-15 wpc, the other uses two KT88 per channel in a parallel single-ended design and produces 23 wpc. At 440 a pair they are at the top end of my price range. I can run EL34s in the same amp and the tubes wont start to glow until about 130ma. bereanbill. scott17. His classic builds and reputation for supreme sounding amplifiers have graced many an audio forum for two decades or more. The 470 ohm cathode resistor sets bias at a 75mA which is only about 68% of the maximum plate dissipation so expect long tube life with this amp. The low frequencies drop off the fastest in pentode mode, the least in Pa(max sig) Pg2(0) Pg2(max sig) KT88 2x33 2 x *It is essentiat to provide two separately adjustable bias voltage sources, having a voltage adjustment range of -2-25 00 Hoffman Amplifiers Tube Amp Forum, Layout thoughts, KT88 SE build. amp blueglow kegger kt88 se single ended stereo tube 1; 2; 3 Go to page. You might instead try the cascode 6SN7 front end I used with my 300B amp (which is what that second one you posted is doing), and replace the 300B in my amp with a KT88 and use some plate to plate feedback like they did in that second one, but try a bit more like around 300K. ) How do I compare these specs? And as it powerful enough to power duel mono? Single mono? My second question, is once the power transformer is peachy, talk to me about chokes. Tube Noob. Back in 2007 - long before I was a forum member - I built this amp. C2 could be about 100µF/160V, select R4 and R5 for a current flow of about 1mA. It can utilize any KT. ga('set', '&cu', 'EUR'); ga('ec:addImpression', { 'name': 'TAD 6550A-STR REDBASE, Premium Matched', 'id': 'RT881', 'price': '73. com is the one I was planning to build before coming across the SSE. In all of the se KT88 / EL34 amps I have seen the the KT88 / EL34 are interchangeable. tweaking and upgrades over the years. I will post some pictures of layouts that I am sketching up as soon as I get the time. If you actually listen to his video, he dances around all the problems I am hearing, lack of detail, rumbling bass which is all related to high distortion. KT88 SINGLE-ENDED STEREO AMPLIFIER Stereo 6-8 Watt/channel Single-Ended Zero-Distortion *Prototype sold – taking pre-orders for production units. But the above topology, and 7591 is one of my latest amplifiers. com ) and www. I have been running my stereo KT88 SE for about 10 months now at a minimum of 50 hours per week. I am trying to find a proven schematic with Hammond power tranformer complete with model number. Interesting thread for me as I have a pair of 88s and was looking to build a single ended stereo amp of about 10W per channel. Welcome To the Hoffman Amplifiers Forum January 12, 2025, 08:40:00 am: Welcome, Guest. A PSU capable of supplying KT88 will suffice for EL34's Either the KT88 or the EL34's can be strapped as triodes if the Amp doesnt come with that feature already Andy . I'm not too worried about distortion at higher powers but a reasonably clean 5 to 6 Watts would be great. 6L6 Tube Amp Schematics. I have built a KT88 SE amplifier but I am having trouble to get the feedback circuit to work. I will say that this amp isn't very good for rock. This amp runs the user’s choice of the Type 80 rectifier, or a 5Z3 for higher voltages with tubes like the KT120. With my Don Sachs 6SN7-based tube preamp and the Inspire amp, running the volume pot at 12:00 yields about an average SPL of 87db with peaks to 100db, which I only listen to for short The SE tube amplifier design has been based largely around Mikael Abdellah's KT88 SE Tube Amplifier design from 2003. 2+ (www. com has a fine looking KT88 se as well. Then i made a switch for adding in series another 100k resistor which would be connected so i could use the 6sl7 as a driver tube. 845 Tube Amplifier 6L6 Tube Amplifiers. The voltage/current measurements have not changed. [2]Four KT88s installed and powered. 'I want 8 KT88 in triode and use these regulators I have already purchased, I want it to be unique and I want you to design it for me' is going to end in tears. Attachments. My order status from them has been radio silent for weeks. Alex's KT88 SE amp on diyaudioproject. S. I use them to drive 91dB tower speakers in a moderate-sized (260sf) room. This is based off the popular Kegger/Abdellah/Blueglow build with a twist, using a pai I have a JLTi KT88 Mk2 integrated amp, based on the YAQIN MC-100B amp (substantially modified by Joe Rasmussen of customanalogue. No blown fuses. The amp is switchable between triode and ultralinear operation, so I have probably run it about half-and-half in each mode. The attachment only shows one That was the prototype amp, it used a different supply configuration that couldn't be reproduced with off the shelf parts, so I put one together here. If not, swap the good tube to that channel, turn the amp on again, and measure DC voltage across a new cathode resistor. I'd prefer it use a 12ax7/12au7 input stage and have an input sensitivity of 1v or less. Maybe I can just copy someone else's layout. svetlana. Not good for a long life of the amplifier - transformer - caps and valves. With a pin adapter, it can take any of I'm in the process of gathering parts for this amp and see that Mark has closed his site, and things are rather quiet over at AK. I have been using KT120s in it almost from the beginning and I like them a lot. Amazon. Budget 300B Amp; KT120 Monoblock Amp; EL34-6SQ7 Amp; But the KT88 amp is 12 watts and Dennis seems to suggest (from what I remember) that it'll power speakers that are around 88dB. I listen to everything from rock to KT88 SE advice sought. T. Home. 3K OT primary. JPG. The amplifier achieves good power output and His standard KT88 SE amp will produce a maximum of 12 watts per channel. Thread starter Gandalf; Start date 2017-01-10 5:09 pm; Status Not open for further replies. End of February ESD. I received everything except Edcor many weeks ago. andrew_whitham. The clementine is a triode amp if it is used with a 1625 , I compared their GXSE15-8-5k tx to Transcendars 10W 8ohm 5k, which has better specs, and is somewhat larger Not talking money here, but trying to compare these two OPTs,,, I used the GXSE15-6-5K for my KT88 SE-UL. Projects. 2011-11-18 1:05 am #6 If you go for a KT88 amp you can (probably) try EL34's at a later date, the heater / plate current requirements are lower. Skunkie Designs. As of 2022, KT88 valves are produced by New Sensor Corporation (Genalex Gold Lion [3] and Electro-Harmonix I recently watched some YouTube videos on the Willsenton R8 KT88/EL34 integrated tube amplifier and decided to purchase one. Finally got a response out of them today. Figure 1: Power Supply - DIY Single-Ended KT88 / 6L6 / EL34 / 6CA7 Tube Amp. Joined: 20 Mar 2012 1:22 am Posts: 168 The amp uses a 12AX7 valve configured as a SRPP and the output valve is running in pentode mode. 6l6 Guitar amp head with spring reverbView. com: MUZISHARE X7 KT88 x4 Vacuum Tube Integrated Amplifier Push-Pull Power Amp MM Phono Tube Amplifier Balanced XLR 2022 Remote : Musical Instruments. Background- this amp started as an Audio Note Kit 2 SE 6550 amp. I snagged a copy back then, Here you go. Tonight: Reading the manual Soundtrack for this evening: Me'Shell Ndegeocello - Plantation Lullabies So until the amp is built and we can tube roll to confirm our choice it will be the tube that we design around. series tube With negative feedback, this amplifier (fig. I've also reworked a McMartin 20w (6L6 PP) with the gain stages shown on the "High Octane" amp, really awesome gain. A schematic of the SE KT88 tube amplifier that I have built is shown below in Figure 1. 3 vac taps for each kt88, and 3. -----There is pic's of my parallel SEUL 6LR8 amp an push pull triode 6AV5 an dual rectifiers, I go back an forth on the amps with 5V4 and 5AR4 rectifiers. I find that my KT88 SE amps play as loud as I want 99% of the time when paired with either Dynaco A25 or Advent/1 speakers (neither is particularly efficient). Joined 2009. 1; 2; Next. kt-88 amp schematic/parts list I am new to this whole DIY thing. Re: My latest project - KT88 SE tube amp I'm building this amp to drive the Stances sitting on the shelf over my basement workbench. 92; Next. decware. Jan 6, 2019 #5 Kegger's amp is switchable from UL to triode, KT88 SE Circuits Hi. KT88 - Single Ended Tube Amplifier Build 2018 (different specs and different pin-out). He has a "souped up" edition which will produce 17 watts per channel, again with a single KT88 per channel. I assume you are operating the 6V6 as a pentode. by the MOV (Marconi-Osram Valve) subsidiary of G. jdsalinger said: Oh, KT88 SE Abdellah (modified by Alex Gendrano) + AK. Since Amazon was out of stock, I chanced it and purchased it from China-hifi-audio, I made another video about getting started on the build, component selection etc. T. Alex has made some changes, such as the ability to switch the amplifier between triode and ultra-linear operation. There will be a switch so I can change between UL mode and triode mode. S. Jump to Latest Check your manufacturers specs to This simple single-ended amp project by Pete Millett is a great performer and a very well documented project that was immediately adopted by many DIY'er's. Go. The 300B A50 couldn't put out 3W either. Are KT88's good choices if you want a 6L6 li Hey all! So I finally made a decision about what amp kit to build for my very first tube amp project! I'm building one of scott17's KT88 SE amp kits! In the build log to follow, I'll be detailing the build process. Taking the Aric Audio KT88 120 single-ended Amplifier to the next level- this amplifier has many upgrades which combine to create a truly remarkable performer that provides more glorious tube power and a variety of tube rolling options. This is based off the popular Kegger/Abdellah/Blueglow build with a twist, using a pai Hoffman Amplifiers Tube Amp Forum, SE KT88 High gain amp in UL mode question. You should consider a ''Bucking Transformer'' before going much Every China amp I have tested is this far off. Both channels of the amp are driven from one 12AX7 using each of the two triode the 6L6, and that was in an old peavy guitar amp. 3V btw. , Genalex Gold Lion. 95', 'brand': 'Tube Amp Doctor GmbH The transformer in the 'kit' is 220 volts AC (110 + 110) so will be over run by 10% in the UK at 240 / 245 volts. It's a bit simpler than the SSE to boot. 2011 My budget is 1,000 USD for amp and speakers, and I'm blowing 550 on the amp. 6CA7 Mikael Abdellah's KT88 SE amp? Thread starter porkchop61; Start date 2008-02-01 7:21 pm; Status Not open for further replies. C, also labelled as IEC/Mullard, and, in the U. The builder made the speaker outputs with RCA plugs instead of binding posts so I am sending it off to a tech buddy to change these out. Hello all, I found the blueglow amp after much searching and especially liked Marks you tube videos, 13 or so for this build. alt + / Cart. His design was based around Mikael Abdellah's KT88 SE Tube Amplifier design from 2003. ? Then I subbed out for 760E dropping, and 360E cathode 457 B+ node before dropping resistor 370V OT plate node Uhg. 70/. 5 inches wide by 12 The Super KT88 120 SE represents the 4th and best. You do not have the required permissions to view the files attached to this post. Remove the output tube on that channel, turn the amp on and see if there is any positive voltage at the grid pin (leaky coupling cap). I have 555v of Anode to Cathode voltage and have 285v on G2, but might want to go into Triode mode just not sure if 555 volts in triode mode would kill the tube Thanks Marc for letting me know about the KT120 be amp. 1, built around Fostex's FE207E. The power amp section employs four KT88 tubes for AB1 class push-pull power amplification. Perhaps a statement of 'I like this KT88 SE amp I have, but I want to drive these 87dB speakers' is a better design starting point. The results from testing the amplifiers are quite similar to the results from the OddWatt 225 (6SL7 SRPP / KT77 Class-A 6CA7 Mikael Abdellah's KT88 SE amp? . I changed the bias and upped the voltage for using the transmission version of the GEC KT88. hifiandaudio. What the heck is your heater voltage at with that Champ PT being used for a 88, as that tube needs over 1 full amp more Heater current than a 6V6 does! I would venture a guess that the voltage is well below the minimum needed 6. However I've heard KT88's are also good if you want a tight sound yet has a little more thump and presence. 5V and both 12AT7 will be on specs. It will take a while to go through all the videos but it is worth the time. Looking to DIY my first tube amplifier, and was wondering what people's opinions were regarding the sound of these two amp/tube combinations. Hi all Newbie here. In my amp i used the 6sn7 driver tube and 100k fb resistor. e. The output transformers are Hammond 1630SEA with a I thought that the cathode current of the KT88 was 230 and I was well below the rated cathode current. 5 watts, and I am bending the specs a bit. @ 230ma. I figured that the heavier tube with all higher specs would run cooler, not hotter. And I would then skip the GNFB. The amp uses a 12AX7 valve configured as a SRPP and the output valve is running in pentode mode. 4) will give 32 W output with about 0-25% distortion at an anode potential of 335V. Or 6SN7/EL34 amp. I've never built the P1, I went straight for the November as my first amp. The amp is question is Pete Millett’s Single-ended E-linear Amp. 4 KB · Views: 9,549 P1000455. Title: KT88 Author: GEC England Subject: JA-FP-2000-10-01 Created Date: 10/1/2000 7:37:10 PM More specifically, the Tubelab Simple SE with KT88s vs the Tubelab Simple PP running EL84s. In the power circuit it has a 10H 200mA but I wasn't sure about the specs on this one with it being 250R and not listing a mA rating. Check all the passive components around the output tube--grid resistor, triode switch, etc. I want to build a 2XKT88 amp, per the GEC data sheet. Choose a good quality audio output transformer with a 5k primary and rated for at least 10W. (It has the appropriate heater supply 5V and 6. Warning to anyone planning to start this Characteristics Svetlana Outline drawing T SVETLANA TECHNICAL DATA Headquarters: Marketing & Engineering: www. Specifications. The SE tube amplifier design has been based largely around Mikael Abdellah's KT88 SE Tube Amplifier design from 2003. There are a number of good schematics out there for 6550/KT88 SET amps, so this project is about putting the pieces together, trying a After Dave 're-engineered' the amp, he basically quadrupled the power output to all of about 4 watts from one EL84 in single ended 'pentode' configuration. I want to use the 1650p as the output. Every component is meticulously hand-wired and soldered, offering effective isolation and shielding, and the body is finished with piano lacquer. Just have some basic questions that will help me to proceed with the build or look for something else. Any updates on the Kegger Bluglow KT88 SE amp? in My 5w EL84 Inspire amp isn't quite enough, and many of the KT88 SE amps I've seen aren't handwired and are still stupid expensive- like Unison Audio, and that other Italian company I'm forgetting. Dr Se Kt88 Amp Hi, A friend of mine was listening to my tube amp (se pcl86) the other day and now he wants one done by me. 05% residual THD) and a Velleman PCSU1000 (PC interface) oscilloscope. I like the idea of rolling different kinds of tubes (that's fun), but the more I think of it, getting an amp made for one kind of tube seems like a better idea. Steve probably read the specs and believed them, heard some tube lushies and thought it sounded "rich". Next response of the amp. Joined 2008. He has recently begun building a parallel single ended version, I believe named a PSE KT88, with two KT88s per channel. for 6ohm 89dB speakers, will either amp have enough drive to get decent sound? this may sound to some a silly question. both designs are SE, what is the 'be'? 2. com), with 12AT7s replacing the 12AX7s, only 2 6SN7s from the original 4, and several very significant changes to the circuitry. Add to EJ. Welcome To the Hoffman Amplifiers Forum December 14, 2024, 05:13:01 pm: Welcome, Guest. B. 15vac *2 for 6sl7. Created with Snap. He has chosen the KT88 (aesthetic reasons); as he liked my amp which is SE i plan to make him a SE kt88 stereo amp, only requirement is that it must have a headphone output also. As expected the You should take a look at the following video which shows you how to build a KT88 SE amp in great detail. Please login or register. Hmm, I just don't know. If anyone has photo's of their finished se kt88 amp that they can post links to that would be greatly appreciated. It is my first tube amp; but as far as I am concerned, I am pretty sure that I will not leave a HOT light bulb charged at those god-only-knows potential difference waiting for any clumsy person (read, me) to beat them. Tubeglowpio Active Member. I know a lot of people have this amp built. Some of these photos are during the build so they may not appear complete. If I really do want to annoy the neighbors, I use a KT88 SE amp connected to the My amp; is with EL34 Mullard and 6CG6 Matsushita/ECC85-that I prefer instead ECC81,82,83, because it has more current about 10 ma and big mu, aprox. I'm a big Zep fan and that type of music just doesn't have the impact it does on high power amp. Alex has put together a single ended (SE) KT88 tube amp. pton mtipru kxdlzug yalohu zekupe vbjz rnpy vavvmb vpmck ayv