Kt88 amp schematic 7v LED's instead of the 2v ones here to gain a bit of current now) That is the basic circuit I've been running on SE Pentode amps running in UL mode. Output power will be about 5W. 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. At the schematic discussed V1b has no function. Push-pull KT88 class A amp with "universal" driver PCB - Diy tube amplifier schematics ax84. For simplicity & aesthetics I prefer diode Jan 7, 2019 · I'm going to follow the schematic blueglow posted pretty closely but wonder how he got around 450 volts on the kt88 plates using a 360 volt power transformer. . Schematic by Jean Hiraga, published in L'Audiophile 14 (January 1980). Kt88 Tube Amp Schematic. Another similar schematic is available in the 6550 amps section. Due to the long delay, the Apr 3, 2016 · I will be constructing an amplifier based on the infamous Mikael KT88 SE schematic that seems to be a favourite schematic to build. This amp had 4 channels and 8 inputs. This time is a family commitment stuffs which delayed my hobby. The 470 ohm cathode resistor sets bias at a 75mA which is only about 68% of the maximum plate Jul 24, 2016 · SE KT88 Tube Amplifier Schematic (12AX7 SRPP input) by Jean Hiraga - [6 Watts, SE, class-A] SE 6550 / KT88 Tube Stereo Amplifier Schematic (6N1P input) - [4 Watts, SE, class-A, Triode or UL] - (Project) Jul 4, 2007 · Mikael's KT88 amp that Arnold mentioned (and that I have built and use every day) is a single-ended amp. 12ax7 , Tube amplifier made. That first design shows the output tube with -28V on the cathode (and fixed bias on a SE amp), you are gonna end up with -40 to -42V with a KT88 and I'm not sure that cascaded 6SN7 will do it. I assembled one channel on test bench and it seams that it works fine. With a number of different KT88 tube amplifiers we have had good results using new production JJ KT88 Blue Glass and Genalex - Gold Lion KT88 tubes. I already have transformer for one PP monoblock or one SE stereo: 350-0-350 @ 250mA. Other input tubes can be used in the driver stage, the closest match being a 12AX7 which will provide more gain. KT88 SE Stereo Amplifier – Hand Wired Dimensions: 18. Jean Hiraga 12AX7 (ECC83) Single-Ended KT88 Tube Amplifier Schematic. No wonder why this amplifier sound so wonderful. Can you please suggest good sounding KT88 push-pull schematics with these tubes? - ECC81,2,3, ECC88. All the amplifier in Triode connection. Dec 1, 2008 · I'm getting ambitious and want a winter project for after Christmas. I want to used KT150 tubes. This is a rather old technology gizmo. Managed to get it working 4years later, due to budget constraints. Jean Hiraga's single-ended KT88 tube amplifier schematic with 12AX7 (ECC83) tube input stage. Sep 1, 2014 · Figure 1: OddBlock KT88 Series 1 Tube Amplifier Schematic The voltage gain (input) stage is a common Shunt-Regulated Push-Pull (SRPP) amplifier using a 5751 miniature dual triode valve. KT88 distortion and frequency at 25W with 10dB of feedback Vin=0. (actually 1. The Sunn 200S used two KT88's. Even if the circuits require push pulls in parrallel is alright. The input signal to the first stage of the amplifier for full output is 500m V. 4) will give 32 W output with about 0-25% distortion at an anode potential of 335V. I found a source for 6NO30 "tubes". Complete schematic. You might not willing to turn this amplifier ON with this poor safety condition. I would like to build an SE amplifier with two parallel KT88 output tubes. 32 W output and requires an input of 100m V. Very good sound with the right transformers and quite easy to build. Using psud2 I'm getting around 450 when using a 400 volt transformer with 5AR4. If I wanted to build a parallel With negative feedback, this amplifier (fig. Nov 30, 2009 · Figure 1: OddBlock KT88 Series 1 Tube Amplifier Schematic The voltage gain (input) stage is a common Shunt-Regulated Push-Pull (SRPP) amplifier using a 5751 miniature dual triode valve. Jun 22, 2007 · Mikael Abdellah KT88 Single-Ended Tube Amplifier Schematic Output power will be about 5W. Please Note: KT88 Works Both as Integrated & Power Amplifier If that is the kind of sound you are into, then this is the Push-Pull amplifier that will change your. 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. Figure 1: Single-Ended (SE) KT88 Tube Amplifier Schematic with 6N1P driver stage The amplifier section is generally the same as Mikael's, with the main change being that the cathode resistor on the output tube has been increased from 470 ohms to 560 ohms. 2k screen resistor on KT88. The saying, “the […] Sep 13, 2006 · Still need KT88 amd Hammond circuit Guys Is there anyone out there that has a schematic easy to follow for a KT88 amp with Hammond primary transformer and Hammond out put trany. Schematic with 3x ECC83, 1x ECC82 & 4x KT88, 70-04-12 Dec 12, 2020 · I made another video about getting started on the build, component selection etc. Jun 22, 2007 · The popular single-ended (se) KT88 tube amplifier schematic by Mikael Abdellah. Thanks Bill « Last Edit: February 18, 2013, 01:19:13 am by Tone Junkie » Sep 10, 2014 · A schematic of the SE KT88 tube amplifier that I have built is shown below in Figure 1. I have been searching for some time and can’t seem to find one anywhere. 69Vrms. Come to think of it I have a VHT amp schematic that uses 2 kt88 for 60 watts I should check the voltages and filtering scheme on that one also. KT88 distortion at 30W with 10dB feedback and Vin=0. Thank you very much and a happy new year to everyone. Feb 7, 2012 · There is a couple KT88 amps in there, push pull and a parallel push pull, I built the PPP and it is awesome, 120w and a great range, full. KT88 distortion and frequency at 25W with 16dB of feedback Vin=1Vrms Mar 7, 2022 · In my initial inspection, this KT88 based vacuum tube amplifier is made with all used components inside. There is a schematic of what I've done so far. A 6DJ8 / ECC88 tube can be used in place of the 6N1P tube with good results. The 1976 PA Columns were designed to be used in pairs with this 1966 Major PA amp. Mikael Abdellah KT88 Single-Ended Tube Amplifier Schematic. Schematic with 3x ECC83, 1x ECC82 & 4x KT88 (Marshall, 1970). Mar 7, 2022 · In my initial inspection, this KT88 based vacuum tube amplifier is made with all used components inside. Sep 10, 2014 · A schematic of the SE KT88 tube amplifier that I have built is shown below in Figure 1. Hope this helps you out some KT88 Single-Ended 1. 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 amp. Hope someone here might be able to help. Part of DIY is that you can do things that manufacturers won't. And re-case and get it singing again 4years later. 66-1. I am looking for a schematic diagram for an old TAC KT88 push pull amp. 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. The later 2000S amps switched to 6550's. Feb 7, 2023 · The difference you are going to find is a KT88 is gonna need more voltage swing from the driver than a 6L6 does. As KT88 Dec 30, 2023 · Hi everyone. Even when negative feedback is omitted the amplifier has only 1 0/0 distortion at. Further inspection, I found that this amplifier is a single ended KT88 with large output transformer. KT88 SINGLE-ENDED STEREO AMPLIFIER Stereo 6-8 Watt/channel Single-Ended Zero-Distortion *Prototype sold – taking pre-orders for production units. All the amplifier in ULtralinear connection. anyway edcor has the transformers, the link Im sending has the transformers at the bottom match transformer numbers with amp u desire, just call edcor and rattle off the voltages and milliamps of the power Nov 8, 2014 · Hi everyone. Figure 2: OddBlocks - Power Supply Schematic. May 29, 2005 · Try looking for a schematic for an early Sunn 2000S. For simplicity & aesthetics I prefer diode rectification in the power supply. Amplifier & Power Supply Back to Top May 5, 2020 · Hi all, I have been in a journey of learning with my first tube amp, since 2012. I want to build 50 to 60 watt per channel amps, push pull kt88. 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. They used four KT88's. Specifically the one with ecc83 in front. Generic 200W Amp schematic with 2x ECC83, 1x ECC82 & 4x KT88 (Marshall, 1968). (on the original amp I'd at least drop that KT88 grid resistor down to 220K) ' ' Jan 16, 2008 · If I will go with SE then with Mikael Abdellahs schematics, but I am still not sure what scheme should I use for PP. Now i'd like to advance myself in tube amplifier for speakers as Beta22 is more suitable for headphones. Nov 9, 2009 · tube an replace it with (2) 2v red LED's in series, also 1. 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. For those of you who don't recognize it, this is a thermal relay in an octal socket. The output stage (6550) neither is optimal since output tubes have common cathode resistor. Nov 30, 2009 · Figure 1: OddBlocks - 12SL7 SRPP / KT88 Push-Pull Tube Amp Schematic. Thank you very much. If single-ended is OK for your needs then I can highly recommend that schematic. I am currently running 120 mA through transformer and eventually I will increase current Oct 16, 2021 · Much better results would have achieved with a single 6SL7 halve as voltage amplifier direct connected the 6SN7 LTP. Major 1966 PA, 200W head. My knowledge of electronics theory is limited (relating to valve tech) but I'm confident with a soldering iron, as well as following basic safety guidelines. Power 10W. xvwgv auzmygl ebwg ufds hksr ymiksdw tperv dng orqapl pgtysj