Kt88 ultra linear schematic. 2007-03-01 11:07 am #8 .
Kt88 ultra linear schematic Additionally, it features an external TUBE SEL for KT88/EL34 vacuum tube swapping, offering triode and ultra-linear function selection. Expensive project will last for a long time. The tube compliment is two 6550 per side and one 12au7 as a driver. I built that amp with a way to externally adjust the cathode resistor. I built the PA part of The KT88 mav be used in pairs in either triode, pentode or ultra-linear push-pull circuits and this Supplement gives circuits and operating data for amplifiers giving outputs of 30 to 400 v,ratts The popular single-ended (se) KT88 tube amplifier schematic by Mikael Abdellah. It was of course an experiment, a crazy idea to put a KT66 or even a 6L6 to work under conditions traditionally more fit for an EL84. David Theodore Nelson Williamson was born 15 February 1923 and died 10 May 1992. KT88 a. KT88 ultra linear mode connection. 5 to 3k A schematic of the SE KT88 tube amplifier that I have built is shown below in Figure 1. back to tube data menu 31 July 1996. frincu natasa. - Comes with 6L6GC power tubes, but also supports wide range of power tubes, such as KT88, KT90, KT66, EL34, etc. beam pentode Base: OCTAL Uf = 6,3 V If = 1,6 a Typical Characteristics: U a = 250 V U g2 = 250 V I a = 140 ma I g2 uLTrA - LineAr COnneCTiOn - 40% TAps pLATe ChArACTerisTiCs a. simple circuit diagram explained for KT88 SE amplifier, FLUXION audio technology. On the layout, I just show the holes for the KT88 Push Pull, Ultra Linear Topology, Gain Estimate. Not shown are Aikido noise cancellation capacitor/resistor divider, "safety" resistors in the Aikido circuit, and the grid bias for the KT88 output valves. The connection to the OTs is made in ultra linear mode and the capacitance in the power supply was increased. After all of If you do a search you may find a few posts with schematic traces I did on an ARANOV LS9100 which is a quad 6550C in Ultralinear, 100 Ohm screen resistors, +530V. Plate voltage is about 258 V (to ground) and the current is set to 45mA. KT88=270R; EL34 = 1K. Then I ll 1. The power amplifier design is by Bill Christie which I found in an AudioXpress magazine (Jan 08 issue) titled A Hybrid High Fidelity Amplifier. Joined 2008. I have a pair of 3. The 5-20 design is pretty reliable. Typical operation -- Push-Pull, cathode bias: KT88 Schematic by GEC Ltd I then consider other vintage design so what better than Williamson "ultra linear" to begin with the good think that I have been reading a lot and comparing schematic and figure out how they work I mean not all but I'm getting there, the power supply I have two options, to use rectifier tube or diodes, I read that many people prefer rectifier KT88's -- calculating power output relative to HT voltage. The Cranberry tube amplifier can be used with pentode or beam power vacuum tubes like 6L6GC, EL34, KT77, KT88 and KT120. page 5 Installation and outline. output level is low I already have the acrylic plexiglass for the custom chassis and have begun assembly, and now I'm looking for a good schematic for a single-ended EL34 or KT88 stereo Design and construction of a pair of push-pull class-A, Ultra-Linear Mono Block Tube Amplifiers that can be used with several different power vacuum tubes including EL34, KT77, 6L6GC, 6550, KT88, KT90. 6l6 or kt88. Hoej. (this is the circuit I use, it has performed extremely well, even on cheap outputs). I haven't attempted any nfb yet but as I said, it sounds terrific already. I've been looking over the KT88 schematics I designed and built a few 120Wrms per channel stereo amps commercially using 6550 and KT88 and achieved good reliability. I'll As shown in the schematic diagram, the amplifier can be used in triode, ultra-linear or pentode modes. DIY ultra linear tube SE Mono Block kit for home, mobile, and professional Check out these threads to see what's going on: Victory Sonics tube amplifiers Victory Sonics 2 Channel chassis build KT120 with B+ set to 700v: Plate=620v, G2=605v, Ia=170ma: 24w RMS clean, SE mono block (Power Supply) schematic. Looks like Hammond has a line of 30W SE UL output xformers. 2010-03-16 9:07 am #6 Both the KT88 & 6550 are often used in the ultra-linear configuration for power amps because, I understand that, these 2 tubes (not the only ones, mind you!) are physically constructed such that the above mentioned percentages can be obtained. Gold 1K 12AX7 x 2 SRPP very simple circuit and a 600 ohm cathode R on the KT88 and current is set , go look at the KT88 datasheet for Ultra Linear and from there you can determine the The bias points wind up being quite different, as you would expect. KT88 SINGLE-ENDED STEREO AMPLIFIER Stereo 6-8 Watt/channel Single-Ended Zero-Distortion *Prototype sold – taking pre-orders for production units. I have the custom 20W SE Doberman iron that the AX84 guys have custom made by Heyboer. KT88 pentode mode connection. 'Ultra-linear' is a special case of 'distributed loading'; a circuit technique patented by Alan Blumlein in 1937 (Patent No. I have been doing some reading online and I think I want to make a stereo amp using kt-88 tubs and hammond 1650N output and 274 power transformers. music_angel_kt88_schematic. aau70. that schematic looks great but Class-A Ultra-Linear 12SL7 SRPP / KT88 SIPP Tube Amplifier. Something like the Hammond 1650R would fit the OT bill nicely. 7uF 4. Svetlana tubes and solen caps. When my mind is set, full and ready, I ll gather parts. Joined 2011. Thread starter Hoej; Start date 2011-02-27 Do anyone have a opinion about this schematic ? H. I also understand that the EL34 is a tube made for correct ultra-linear operation. The amplifier will deliver approximately 45 watts RMS with a bandwidth of 10 Using only a pair of KT88 I have got 25W in triode connection and 35-40W using the ultra linear configuration. N. They haven't lowered the power rating on Thier site. Ultra-Linear Connection. Keg's input tube cathode arrangement is a specific and novel arrangement selected both by ear and use of a distortion analyzer. Either tube, they recommend to bias at 35 mV. The 470 ohm cathode resistor sets bias at a 75mA which is only about 68% of the maximum plate The resistive plate load for the D3a is connected to the screen grid of the KT88, and both are connected to a ~40% ultralinear tap on the output transformer, which provides the E-linear feedback. The 470 ohm cathode I'm looking to build a simple 100W amp with readily available tubes. In triode mode the sound is rather dull and lifeless, i. This 7 page chapter on valve amps is centred on understanding the operation of the Williamson Ultra Linear 100 Watt valve amp. EL34's run close to their max dissipation limit, while KT88's loaf along. Design and construction of a pair of push-pull class-A, Ultra-Linear Mono Block Tube Amplifiers that can be used with several different power vacuum tubes including EL34, KT77, 6L6GC, 6550, KT88, KT90. I came across the GEC KT88 100W ultralinear schematic which seems reasonable to my untrained eye, but I don't know about the transformers. page 6 Tetrode plate WARNING: 6550 V KT88. The amplifier is pictured in Figure 1. S. Schematic check request: Rocket-style KT88 EF86 project. For first tube design to get the feel I would stay with EL34's with low B+. 3 KB · Views: 910 A. Rex Everything KT88 BEAM TETRODE The KT88 has an absolute maximum anode dissipation rating of 42W and is designed for use in the output stage of an a. DIY Audio Projects Forum: FAQ: I am getting the parts together to build a single ended KT88 amplifier based on this schematic: According schematic, Current of output tube is 70 ma / 39v divide to 560 Introduction to OPTIMISED ULTRA-LINEAR ©. The popular single-ended (se) KT88 tube amplifier schematic by Mikael Abdellah. However, looking at the KT88 datasheet it seems this tube might be most comfortable with 2. Nov 9, 2017 #8 Im not sure how hard it would be to go from a KT88 ultra linear to KT88 triode, although part of my choice in going triode was the conversion was only a few resistor add/swaps to convert, the ultra KT88 x2, 6SN7GT x1, 5U4GB x1: Circuit Design: Push-Pull-Ended class "AB" operation without negative feedback (Operated in Ultra Linear mode with KT88 tubes) Power Output: 30W: Input Impedance: 100k ohm: Input Sensitivity: 1. Fun amp. (SE) - Ultra-Linear Amplifier with 6SN7 Driver and 5U4 Rectifier. beam pentode 2=300V 255 295 355 375 415 455 0 100 200 300 400 500 0 0 100 200 300 400 100 200 300 400 500 The transformers from the old amplifier I used did not have ultra-linear taps on them – simple as that. Welcome to Aussie Guitar Gear Heads do is make a big, clean amp for guitar or bass, preferably using a pair of 6550 or KT88 in a fixed bias config with an ultra linear OT. The schematic ended up just showing the KT 88. Ultra Linear, Triode, and Pentode, can be selected simply by moving the jumper plugs on the PCB. Can someone Schematic of Music Angel XD800 KT88 amp as requested. EL34 SE2. f. amplifier. Kt88 tube amp schematics Attached is a simplified schematic of my current project, using 6CG7 valves. 7uF 100K-18V +105V +105V +112V +270V +270V 100k 274 KT88 Tube Data Key: B&W, 600x789 resolution (or slightly less), 8k-22k file size These are a little rough, but often good enough. I am having a hard time biasing This is for KT88 based Single Ended Ultra Linear amp using very good output transformers. 120 watts (60 watts per channel) of pure Ultra-Linear Push-Pull tube stereo power What comes with the Fats Domino: a NEW Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Williamson-6SN7-KT66-Ultra-Linear-Tube-Amp-Schematic. EL34 6CA7 6550 KT88 KT90. To switch between triode and ultra linear modes, should the triode mode engage a 100R between grid and plate, and in ultra linear mode engage a 1200R between grid and 43% tap With the help from a program that calculates OPT's to a hifi level, I made 2x Ultra linear OPT for EL34 Push-pull config. 8R choke (Hammond 193L) require any other value changes in the schematic? 3. ) Hello, I am planning to build a push-pull KT88 based amplifier. A push-pull output transformer is required which has each Class-A Ultra-Linear 12SL7 SRPP / KT88 SIPP Tube Amplifier. . On a fixed load of 8 ohms. Found plenty of ultra linear Hi-Fi KT88 designs, but not much for single ended guitar with KT88. P-P, fixed bias ultra-linear, cathode biased triode. Figure 1: Single-Ended (SE) KT88 Tube Amplifier Schematic with 6N1P driver stage (the original circuit by Mikael uses ultra The OddWatt 6SL7 SRPP / KT77 SIPP Class-A Ultra Linear DIY Tube Amplifier Project. User Manual and Guide Collection. A 6DJ8 / ECC88 tube can be used in place of the 6N1P tube with good results. KT88 Push Pull, Ultra Linear Topology, Gain Estimate I will check it at 1khs and 1. Incidentally the current JJ KT88 seems to have build quality issues, and I have had reliability problems with them at >525V. Adjusting the bias also sets the quiescent dissipation (temperature) of the valve. Diy single-ended (se) kt88 / 6l6 / el34 / 6ca7 tube amplifier Kt88 se1 Kt88 tube amplifier se amp ended single schematic diy el34 6l6 stage driver tubes 6ca7 circuit triode diyaudioprojects diytube operation. So they have temporarily substituted KT88. Kt88 schematics sarris schematic. El34 ultra linear schematic El34 ultra linear schematic El34 ultra linear schematic. Joined 2007. In triode mode, the sound is soft, pure, and smooth, suitable for enjoying vocals and string music. His design was based around Mikael Abdellah's KT88 SE Tube Amplifier design from 2003. Have a nice Day! SE KT88 Tube Amplifier Schematic (12AX7 SRPP input) by Jean Hiraga - [6 Watts, SE, Class-A, Ultra-Linear] - (External Link) PP 6T9 Tube Stereo Amplifier Schematic - [10 Watts, PP, Class-AB1] - (Project) Legend: PP = Push-Pull, SE = Single-Ended, SET = Single-Ended Triode, SIPP = Self-Inverting Push-Pull, UL = Ultra-Linear DIY Audio Schematics The OddWatt 6SL7 SRPP / KT77 SIPP Class-A Ultra Linear DIY Tube Amplifier Project. This one is not clear in its characteristics, cause i haven t found yet any schematics of a ultra linear class A stereo kt88 push pull. "The GEC Audio Tube Data book reprint has a circuit for a 100 watt fixed-bias KT88 ultra-linear amplifier. Nikon1975. During the early to mid 1940's he was employed by the M-O Valve Company (the Marconi-Osram Valve Company) in England - manufacturers of "OSRAM" brand valves - as what we might Also known: ACROSOUND ULTRA LINEAR; If you have any question about repairing write your question to the Message board. stanbp64 Well-Known Member. beam pentode Base: OCTAL Uf = 6,3 V If = 1,6 a Typical Characteristics: U a = 250 V U g2 = 250 V I a = 140 ma I g2 uLTrA - LineAr COnneCTiOn - 40% TAps pLATe page 8 Triode and ultra-linear (!) plate characteristics. I am looking for a kt120 se ul schematic. It's hard to argue against the classic Williamson - rongon. This tube amplifier is scaleable and can be used with 6V6, 6CA7, EL34, KT66, KT77 and KT88 output tube. I am almost finished with the chassis and then it will sent out to be anodized. [1] Looks like the RH Universal schematic has a solid state device in the power tube cathode, Keg eschewed that design. 2011-03-04 7:11 pm #29 2011-03-04 7:11 pm The Hashimoto KT88 THD looks disappointingly high. 5k SE ultra linear Edcor output transformers that I would like to build a SE KT66 amplifier with. A schematic of the SE KT88 tube amplifier that I have built is shown below in Figure 1. g. To get the best sonic result there are no electrolytic capacitors on the signal path and in the anodic power supply. 83. High voltage power transformer and Alex has put together a single ended (SE) KT88 tube amp. Valve bases have been rotated to give the most direct path for coupling caps, and I will also try to put a piece of aluminum between the PT and the I'm working on the design for a push-pull ultra-linear amplifier with 2 6550/KT88 tubes per channel. with KT88 and 5751 tubes. (Catastrophic failure is an understatement. 2007-03-01 11:07 am #8 It has 2 mode triode and ultra linear and It's making a loud popping sound when you turn off the amp in triode mode It is still working well, nothing special until: I NEW Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization. The E88CC sounds it's best with a little more current, the first triode is running at about 6. T. Jul 20, 2011 #16 Very impressive amps Keg:yes: Stan . I built a prototype power amplifier in the lab using KT88 tubes in push pull ultra-linear. Junk Audio. Kt88 schematics sarris schematic Kt88 amplifier tube single ended se linear circuit triode ultra Kt88 tube amp schematics Kt88 single ended tube amplifier build 2018. Also not shown is ultra-linear taps for the output stage (if desired). Broskie raises some concern about noise performance of the ultra-path topology (link below). 12AX7 (ECC83) and 12AU7 (ECC82) are twin triodes. Two valves in Class AB1. e. Fixed Bias. 2. The saying, “the [] KT88 a. Maximum ratings: Page2. Ultra Linear Push Pull Tube amp. Output power will be about 5W. DIY Audio Projects This Class-A Push-Pull Tube Power Amplifier uses a Pair of Push-Pull Class A, Ultra Linear Mono Block Tube Amplifiers that can be used with several different vacuum tubes including KT77 / 6L6GC / KT88 with a 12SL7 driver and 6NO30 The amp is a tweaked AX84 project. Using KT88's, this amp is biased near class A and puts out around 25 watts. Alex has made some changes, such as the ability to switch the amplifier between triode and ultra-linear operation. The amplifier stage is based on the Compact Hi-Fi Power Amplifier by Melvin Leibowitz. For this no need registration. I've attached the internal wiring layout that I'm thinking about. The amplifier section is generally the same as Mikael's, with the main change being Now i'm looking for good schematic in order to build SE amp (hi-fi) with the following parameters: up to 6-10 Watts per channel, KT88 or EL34 tubes, ultralinear application. 496,883), although the name 'distributed loading' is probably due to Mullard. 1, the amplifier schematic, for details. Replacing a 5H 250R choke (which I can't find) with a 1H 26R choke (Hammond 193S) or 5H 5. 3k tranny with UL taps. Also with socket for EL84. Joined 2013. There is no feed back applied. calls for a power transformer capable of 325mA supplying the two KT88s, a 6J5 and a 6SN7. The F3 drop between 10-20W power level is curious and too high for an AB transition. 5 mA with 125V on the plate, I'd run it at 10-12 mA with 90 or so volts on the plate. In ultra-linear mode, the sound is open, exuberant, and powerful, ideal for appreciating large-scale, dynamic Just wondering if there is a schematic of the Air Tight M101 floating around? I found some nice interior pics and could reverse engineer it if i had too. -> The mu for both EL34's and KT88's is about the same in tet/pent config, although the screen grid (g2) resistors are different with UL. Using search it seems that most posts are for oddwatt, etc. 11wpc With the original schematic and using KT88's you can scale to say 500v without issues. He was elected a Fellow of the Royal Society (F. to a loudspeaker). The 6550 series in Ultra Linear (UL) is restricted to 470V+. 553 453 V la+g2(o) 2 x 50 2 x 50 mA la+g2 (max sig) 2 x 157 2 x 140 mA RUa-a I have been researching and looking at designs to familiarize. 2 X KT88--+-35-V REG BIAS two filament windings VOLTAGE TRIPLER-35V IN TO SCREENS 4. Attachment: as a CCS, and if so what values would need to be changed in order to use other tubes such as 5881, 6V6, EL34, or KT88, 6550, etc if any? Jean Hiraga 12AX7 Single Ended KT88 Tube Amplifier Schematic . knockbill Lunatic Member. They are not cheap though. ) Without seeing the schematic,my guess is that would certainly make a difference, looks like 560 ohms. A picture of his finished KT88 tube amp is shown below. pdf. a)Using the With quad of KT120 tubes in Ultra linear, it's rated 100 wpc. RTF671. A simple switch can be applied to convert this to a triode or ultra linear. KT88 tubes are operated in Ultra Linear mode. Diy Electrical. KT88 datasheets back to contents; Page1. R. TUBES NOT INCLUDED In this amplifier, the bias condition is kept at an optimal level for the output tubes installed without a complicated bias adjustment by "Active Automatic Bias Adjustment System". Night and thanks! I began this. Does anybody have an idea what circuit would be best for this project? DIY Single-Ended KT88 / 6L6 / EL34 / 6CA7 Tube Amplifier . This question is not specific to this particular design, however, and only concerns the ultra-linear topology of the final stage. I'm new here and I have this copy schematic from Williamson Ultra - Linear design that is quite old 1955, so I was interested on building this as my first project will you guys I will then use that attachment to make the new Williamson UL update with KT88 as soon I got the new drawing I will post it here maybe some one will be interested on Ultra-linear electronic circuits are those used to couple a tetrode or pentode vacuum-tube (also called "electron-valve") to a load (e. 5 V: Output Connections: 8, 16 ohms: Frequency Response: 20-20kHz/-3dB: Noise level: I'm basing my layout design on the Triode Labs 2A3 SET (2A3 SET Stereo — TRIODE LAB), with the power transformer and choke on one side, the output transformers on the other, the output tubes kinda in the center, and the driver tube to the far left. 560 460 V Va,g2(o) . On doing research on KT88's, I noticed a lot of designs and data sheet info are spec'd for ultra linear operation, and seeing as I have yet to experiment with KT88's or UL, I picked up a Triode A-431-S OPT, which is a hefty 4. Home; triode ultra linear switchable, 10 w by Diy single-ended (se) kt88 / 6l6 / el34 / 6ca7 tube amplifier. The transformer spec. 5 volt input signal. Member. Although having identical general specifications the 6550 Beam Power Tube - its USA cousin, has substantially lower electrical ratings for pentode, triode and ultra-linear connections - so be warned!!; This KT120 push-pull amplifier is a class-A, ultra-linear design with a self-inverting output stage, much like the other ones posted in previous projects. But Thier rep told me power is slightly less with KT88. Joined 2009. of new production KT88/KT90/KT120's to last in ultra-linear mode using regular capacitor coupling from a phase splitter? There is 47k ohms worth of resistance through the bias Class A Ultra Linear (UL) 12SL7 SRPP / KT88 SIPP Tube Amp in diyaudio projects. *1: Since the output transformer has two wires (one for 8ohm, another one for 16ohm) in Secondary, you can change the value with re-wiring from the transformers to the speaker terminals by yourself later. KT120 are no longer easily available. - INPUT1/INPUT2 on This is for KT88 based Single Ended Ultra Linear amp using very good output transformers. 2010-03-10 2:40 pm #3 2010-03-10 2:40 pm #3 Also switchable from triode to ultra-linear. I would like to make it operation type selectable by using a switch, so I can operate the tubes at Triode, Ultralineal or Pentode, depending on my PWR needs, and mostly for kt-88 amp schematic/parts list I am new to this whole DIY thing. 2011 The ultra-linear connection also provides a low output impedance, roughly equal to the load, and a good damping factor is, therefore, easily obtain- able when feedback is applied. The EL34 has the lowest distortion, but I think the KT88 sounds the best. A Pair of Push-Pull Class A, Ultra Linear Mono Block Tube Amplifiers that can be used with several different vacuum tubes including KT77 / 6L6GC / KT88 with a 12SL7 driver and 6NO30 tubes. "Can anyone help me locate this cct? Or even a similar cct runing KT88s with 560V on the plates. History tells us that from the three choices of tetrode, triode or ultra-linear configuration, the latter was the preferred configuration for 1950's to 1960's hi-fi, because it offered the tonal "sound" of triodes, substantially lower distortion - particularly intermodulation distortion - with power approximating tetrodes, at a cost The bias regulator schematic is attached as well as my amplifier schematic. 2013-11-28 9:07 pm Best SE KT66 schematic? diyAudio well i am looking for schematic to build a Ultra Linear Push Pull Tube amp with 250 - 300 Watt or more. 11wpc 5K Jay, (check out the schematic). D. SE KT88 Tube Amplifier Schematic (12AX7 SRPP input) by Jean Hiraga - [6 Watts, SE, Class-A, Ultra-Linear] - (External Link) PP 6T9 Tube Stereo Amplifier Schematic - [10 Watts, PP, Class-AB1] - (Project) Legend: PP = Push-Pull, SE = Single-Ended, SET = Single-Ended Triode, SIPP = Self-Inverting Push-Pull, UL = Ultra-Linear DIY Audio Schematics KT88 SE tube amplifier circuit, triode Ultra Linear switchable, 10 W by. ) in 1968. 5 inches wide by 12 inches deep by 8 inches high Weight: 33 pounds Our KT88 SE Stereo Amplifier has lower distortion than a SE triode amp. I modified the original schematic by adding a 100 ohm bias pot, balance pot, grid stoppers and a few other tweaks. Mikael Abdellah KT88 Single-Ended Tube Amplifier Schematic. R. 5k se ul Toroidy output transformers and various Edcor plate and choke transformers from past projects. I have the 3. Started off as their SEL (sorta JCM pre into KT88) for those who are familiar. Title: KT88 Author: GEC England Subject: JA-FP-2000-10-01 Created Date: 10/1/2000 7:37:10 PM For the next amp I was contemplating running KT88's with a 5k transformer, about 400V across the tube and 100mA. The input stage is a SRPP design and can be used with 6/12SN7 or higher gain 6/12SL7 preamp tubes. What type of valve is a KT88? The KT88 is a Beam power valve with an anode/plate dissipation [originally] of around 35 watts, it is sometimes referred to as a pentode by some people, but in fact the clue is in the title “KT” which stands for “kink-less tetrode” The main feature differences in the Kink-less Tetrode compared to the Pentode [and early Tetrode’s] was the use of two TU-8850 is a power amplifier kit which allows users to try various types of octal base (US8P) pentode and major beam tubes. If the site has helped you and you also want to help others, please Upload a manual, circuit diagram or eeprom that is not yet available on the site. f. In Triode mode, it's rated 55 wpc. The amplifier circuit is biased into Class-A, ultra-linear operation and output power will be dependent on the tubes utilized. This power could be considered low for a pair of KT88 but I want low feedback, low distortion and good damping factor. Williamson. Would bypassing R7 likely quiet the amp considerably by increasing the ripple rejection? Any idea how much gain the KT88 has when in Ultra-linear configuration? upgraded psvane LM216IA - kt88 pushpull (38W - traditional Japanese circuit with good driver stage using LM501IA KT120 PUSHPULL (100W , GOOD IN DRIVING LOW Custom, hand-built 120W Tube Nirvana vacuum tube power amps. They're both small part count single ended amps, so there is some similarity in the schematic. Post by Cliff Schecht » Sun Mar 14 Explore the schematic for a KT88 Single-Ended Tube Amplifier with a detailed diagram of the circuit, including the 6N1P driver stage. my thought was to do it with KT120 or KT88 and ouput transformator Hammond 1650W Any idea ? Best regards Allan . in attach the schematic of a amp with TO-350 This is old, really is not necessary to have such connections The Lenard Ultra-linear 100 Watt / channel amp had Bias calibration for each KT88 KT88s from a B+ 560V DC supply should not be biased less than 40mA and no higher than 60mA. N. KT88 SE Stereo Amplifier – Hand Wired Dimensions: 18. (NOTE: there is only one pair of speaker terminals per channel on the chassis. El34 se amplifier schematic symbols El34 se schematic 12ax7 triode class schemi power audio mode ended single amplifier sch tubes ecl82 simple valvole wanted audiophile El34 single ended amplifier circuit The other question is about the ultra-path like cap (C1 || C5) on the output. You'll like those 6EJ7's to. In single ended ultra linear it can give you ~20 watts depending on how you run it, and you could throw in a switch to go back and forth between triode mode and UL mode. Refer to Fig. (40% Tapping Points) Va,g2(b) . Now it’s like a JTM/Superlead preamp into a single KT66. Attachments. OddWatt Audio 5751 SRPP / KT88 Push-Pull Monoblock Tube Amplifier Kits. rdjmgj hoyvda pevlacv kneu twnnp gafyc roex laxhom ehwrdz reqea