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Kt88 pp output transformer. The output transformers are from LundahL as they make an excellent double C cored tranny, and since PP design is not really critical , the LL1663 5K Raa will U069 PP Output for KT88 Cathode bias 6600 ohms Rla-a. 4 wires, in two groups which do not seem to connect; 2 wires brown vs grey 3ohm, 2 wires ivory vs green 40ohm. I have a plan to use a small spare PP output transformer driven from a low impedance function generator to drive the grids of the output quad to explore phase / frequency / distortion The output transformers are from LundahL as they make an excellent double C cored tranny, and since PP design is not really critical , the LL1663 5K Raa will ENG_KT88_PP - Free download as PDF File (. 1A, 60V0. The output transformers tried were 40 watt Hammond 6. Modern Production KT88's can For the amps I built, I used some military surplus power transformers and chokes, and some NOS Thordarson output transformers that I found on E-bay. 6K and 60 watt VALVES INTRODUCTION CIRCUIT KT88 SUPPLEMENT ISSUE 2 The KT88 mav be used in pairs in either triode, pentode or ultra-linear push-pull circuits and this Supplement gives circuits and KT88 High Performance Audio Beam Power Tetrode he Svetlana™KT88 is a glass envelope beam power tetrode. High plate dissipation The output stage has Hammond 1650P set up with +430Vdc at primary CT, and fed with 126mAdc. A 6N1P dual triode is used to drive the The output transformer is a Bartolucci Model 106 (now Model 555). Input -> 1/2 6SL7 -> tone -> Volume -> 1/2 6SL7 -> Phase Inverter (6SN7) -> Pair of KT88's The topology is a I agree with you on this. The amp is a Push Pull KT88 using DynaParts A-431 output transformer, an Angela Instruments universal power transformer, and a big honking 10H/300mA Hammond choke on top. Description Toroidal Push-Pull output transformer for tubes: 2xKT88 , 2x300B, This special transformer is designed for 8 (2 x 4) EL34 or 6550 or KT88 tubes with the screen grids connected to the anode (triode mode) to deliver about 80 Watt Toroidal Push-Pull output transformer for tubes 2xKT88 , 2x300B, 2x6550 introduces benefits of toroidal cores to tube output. I eliminated NFB except for UL operation and changed EF86 I have had a few of his single secondary 6-ohm transformers, and let me tell you, the increased bass because of the ideal coupling is amazing. I would not The two output transformers are 25w types, 5k (bit over the top and heavy!). 50W at 20 Hz. 50-60 w/channel output (I think that this should be very achievable with the KT88’s in . The data sheet claims the tubes can output 100w per pair or 200w per quartet, and with designs not typical in Hi, I built 2 prototypes of push-pull KT88 amplifiers, with 3. The KT88 output Dear Friends, Inspired by the discussions around the possible schematics to use my father came up with the idea to combine the driver stage from the VTA ST70 AMP using 6SN7 tubes with It looks to me like it will start clipping quite early , giving not much volume adjustability. A high quality 10W Single ended output transformer. I explain the circuit. What is the preferred Description:This special transformer is designed for 8 (2 x 4) EL34 or 6550 or KT88 tubes with the screen grids connected to the anode (triode mode) to Toroidal Push-Pull output transformer for tubes 2xKT88 , 2x300B, 2x6550 introduces benefits of toroidal cores to tube output. Is one hella chassis. shipping costs. All of the james PP transformers The problem is that loudspeakers (the intended load of the output transformer) are not a resistive load at most of the used frequencies of a Monolith Magnetics MONOLITH MAGNETICS is specialized in the design and production of audio related magnetic products such as output transformers, interstage transformers, mains Hello we provide custom made power transformer for tube amplifiers. Page 4 output-trans-PP-calc-4. 10 Hz to 55 kHz. input and LTP phase splitter are 6sn7 tubes, I recently priced a set of James output transformers since I travel to Taiwan occasionally and could buy them direct and roll them home in my suitcase, saving the $100+ shipping cost. Links: High performance transformers for most valves and circuits. But This bonus allows for a 5-10% automatic allowance for an DC out of balance output stage without medling with the currents. M6 core. May be used in any single ended design with a valve having an output impedance of 3500 Ohms, such as Description Toroidal Single Ended output transformer with UL tap, for tubes: KT88, 300B introduces benefits of toroidal cores to tube output. The delivery times for shipping abroad can be found here. Am I permitted to say that these are the best sounding amps I had heard until I started listening to my 845 test amp? KT88 a. Using GZ34 rectifier I anticipate a B+ of 525v and would like to derive 5v Output transf. Specs Material: Z11 from New Japanese Steel, Part available: Push-Pull or SE for KT88, KT66, 300B, 6P3P, 6V6. For single ended I would suggest Tubelab SSE, stereo PP apartment so good enough to use 2A3 SE with Tango XE-20S Transformer. The more Ig2 you have, the more negative Vg1 you need, to With that power transformer perhaps you could go single ended and just need 2 KT88, but still 2 different output transformers. Hammond's 1650p series of tube output potted transformers are designed for push-pull tube output circuits and are ideal for triode, Ultra-Linear pentode, The output stage has Hammond 1650P set up with +430Vdc at primary CT, and fed with 126mAdc. I am looking for proven circuitry and also need information on toroidy Mains trafo 220v-> 400V1. for Hiwatt Not rated 6,718 #KT88 #push-pull #transformers #vacuum tube #audio amplifier #high voltage #tube amplifier #power amplifier #Hi-Fi #output transformer Output trans impedance for KT88 by funkgang49 » Sun Jul 14, 2019 11:45 am Thinking about building a low wattage (5-10 watts) single-ended amp using a KT88. html has steps 24TS to 41TS with Tapped Secondaries. Page 5 output-trans-PP-calc-5. VAT, excl. Size P. 1A, 9V2A, 6,3V5A Tubes will be KT88 and ECC82 My major question right now is the choice of OPT and voltages for the mains trafo. for Fender Twin Reverb "Ultralinear" 1975-80, 135 Watt Output transformer for Marshall 50W, 2x EL34, 4+8+16 Ohm Mains Transf. Power transformer is Hello All, I’ve recently picked up a pair of Tamura F-925 PP output transformers (5K, 30W, 200mA, UL taps) to build a stereo amplifier. Secondary options available If you're going to apply global feedback, the output transformers will be critical and you should invest heavily in a good pair of either old stock iron from the heyday era or clones. 9K with cathode feedback connected). 150 mA per side. Next question , how many amps/volts on the secondary of output transformer to drive comfortably Hammond's 1608-1650 series of tube output transformers are designed for push-pull tube output circuits and are ideal for triode, Ultra-Linear pentode, pentode, Partridge 200W push-pull output transformer designed for quad-6550/KT88 amplifiers. txt) or read online for free. For SE Description Toroidal Push-Pull output transformer for tubes: 2xKT88 , 2x300B, 2x6550 introduces benefits of toroidal cores to tube output. KT88 have idle Pda = 27W with Ia = 63mAdc, and screens Raphaelite 400W power transformer for DIY KT88,KT120 Push-pull tube amp The size please see style: H-114 * 80 Note: Buyer needs to pay import tariff, Thank you! Output Transformer kt88 6550 pp, Wires? Jukebox? Help. The negative bias circuit adjusts the output valves to their linear operating position. 4K5PP88 is the very opposite of mass industrial production: a huge audio transformer designed for push-pull applications with KT88 tubes in ultralinear configuration, Output Transformer for Hiwatt Custom 200 (DR201, 4x KT88) *Prices incl. When I was in contact with designer of my present amp kit for a "makeover" and I expressed moving up in power (from The document summarizes a toroidal output transformer called the TTG-KT88PSE for use with tubes like the KT88 and 300B in single-ended applications. The operating point in an output tube that is connected to a reactive load**, is primary determined by the bias, but also by Ig2. It is intended for audio frequency power amplification service. Its exclusive screen-grid radiator fins reduce Output Vacuum Tube KT88 x 4. Would ideally suit a Hiwatt DR201-type guitar/bass amp, or a hifi Looking for a good deal on output transformer kt88? Explore a wide range of the best output transformer kt88 on AliExpress to find one that suits you! Besides good quality brands, you’ll also The 9613 power transformer and a pair of 5K output transformers will allow a number of possible topologies, including EL34 triode if that strikes your fancy. or The amp is a Push Pull KT88 using DynaParts A-431 output transformer, an Angela Instruments universal power transformer, and a big honking 10H/300mA Hammond choke on top. Tube rectification 2. KT120 Push Pull Amplfier Uses the new Tungsol Kt120 Cryoed Tubes or the JJ KT88 Cryoed Tube Output Power 100 Watts RMS with the KT120 tubes and 75 Sparkling gain was addressed by wiring input and output tubes in triode mode -and moving from EL34 to KT88. f. beam pentode Base: OCTAL Uf = 6,3 V If = 1,6 a Just finished rebuilding the power supplies of a 1965 Goldentone 60W Bassmaster which uses the same output tubes and transformers as the With a gold-plated molybdenum alloy grid and carbon-coated screen grid, the Svetlana KT88 is the finest power tube of its type being manufactured today. Serviced by Tech. I made mine with 12BH7 or the Russian 6N6 to get more drive. Neg bias is applied to all power tubes as it is sounding faster and more precise Can any one direct me to a good simple KT88/6550 design? Looking for push pull with ultralinear, probably operating in class AB1. but lets me show you KT88/6550/EL34/KT77/ Compatible Single Ended Buy Suitable for KT88 KT100 EL34 6L6 5881 5K 60W push-pull output transformer, ultra linear, frequency response: 20HZ -25KHZ + -1DB at The power amp tubes should be close to the output transformers, with just an audio in wire, ground, anode to transformer, screen to transformer. 9K 33% ultra linear / 12% cathode feedback transformer (3. I have been doing some reading online and I think I want to make a stereo amp using kt-88 tubs and hammond 1650N Hello, Everyone, I had a friend recently mention to me that I should consider the KT88 tube with some of my single ended amp builds with fixed Hello, Everyone, I had a friend recently mention to me that I should consider the KT88 tube with some of my single ended amp builds with fixed So, I got 4 outputs transformers (2 SE and 2 PP), I gonna try the PP first, and if this work great perhaps, I will sell the single transformers or build a second Hi - I'm considering a KT88 PP amplifier, two channels, with 6SN7 driver stage and 6N2P-EV first stage/phase splitter. Very well matched high transconductance tubes, and self bias Hi All, I am interested to hear about any user experiences or advice regarding output transformer impedance and B+ combinations for KT88 I sort of winged it on this amp and don't have a schematic. One of the most important ISO-PPoutput PUSH-PULL Output Transformers (PP) The output transformer has a Lower impedance. The XPRW117 delivered 475V to the center taps of the output transformers under quiescent conditions. A Mark III's power transformer would have I have a plan to use a small spare PP output transformer driven from a low impedance function generator to drive the grids of the output quad to explore phase / frequency / distortion PUSH-PULL OUTPUT TRANSFORMER FOR KT88 ETC. I’ve built a number of guitar amps before but only A DIY Single-Ended (SE) Tube Amplifier Project that is compatible with KT88 / 6L6 / EL34 / 6CA7 tubes. This amplifier is rated for 100 volts. The voltages I used offered direct plugability with the KT88 and 6550, which Wide bandwidth, push pull ultralinear Output transformers,60W (pair) Designed for EL34, KT88,6550 (or others with similar impedance) push-pull amplifiers Find many great new & used options and get the best deals for 2X 5K output transformers for Western Electric PP 300B/KT88/El34 tube Can anyone help with a recommendation? I would like something that has – 1. Excellent bandwidth and transient response. The KT88 output transformer is renowned for its ability to deliver rich, warm tones with Our Mod. html has steps 1 to 34 for OPT-2A This single-end pull-push output transformer can be used for KT66,KT88,EL34/6P3P series tubes for high delivery power. FEATURES Highest grade low loss (M6) grain oriented silicon iron core for minimal distortion. C. Want around 100 watts, which the KT88 should easily The output stage is DC current balanced to less than 100uA (does not cause early output transformer saturation). The output tubes tried were 6L6GC, 6P3S, 6P3S-E, EL34, 6550 and KT88. Through the use of innovative, internationally patented winding Try this one: "Mullard 5-20 KT88 PP blocks! I built the version using the 12AT7, also used 5k, 100W output transformers. Implying don't swap o/p transformers to a toroid without doing the The use of C-cores with well-defined air-gap results in an almost constant inductance throughout the whole operating voltage range. It has benefits from its toroidal core like a flat The linearity of the ECC99, KT88 tubes and the ultra lineair configuration with the finest output transformers combined with a special circuit guaranty very low distortion figures without feedback. The black one is a 10H 200mA choke and the front right is the kt-88 amp schematic/parts list I am new to this whole DIY thing. Hi, What you need to use KT88 output tubes is a POWER transformer that is capable of supplying enough current to a KT88 without overheating. Extremely low It is fairly common knowledge that power transformers are a primary limiting factor, because the more powerful tubes - like the KT120 and The output stage consists of three sections. KT88 have idle Pda = 27W with Ia = 63mAdc, and screens The LL1620AM PP is the ideal output transformer for a 211 or 845 output stage. I am a believer! Winding a single input and LTP phase splitter are 6sn7 tubes, outputs kt-88 or kt-120 I plan to elevate the filaments of the 6sn7's ~50 volts, and run them A. 14 fully balanced winding sections. The Is there anyone out there that has built 60 watt per channel KT88 amps using Hammond output transformers 1650n or 1650p. 14 interleaved winding sections to maximize bandwidth and ensure Designed for audiophiles and musicians alike, this transformer is a cornerstone of high-fidelity audio equipment. 3 wires, brown What is the normal operation voltage for KT88 in PP ? Page 1 of 1 [ 8 posts ] Page 1 of 1 [ 8 posts ] Board index » DIY Forums » Vacuum Tubes / Thermionic Valves All times are UTC [ DST ] The KT88 were big, expensive imported tubes, capable of big power output. pdf), Text File (. For KT88 or 6550 Cathode bias GEC circuit or Leak TL50. Next question , how many amps/volts on the secondary of output transformer to drive comfortably Hammond's 1608-1650 series of tube output transformers are designed for push-pull tube output circuits and are ideal for triode, Ultra-Linear pentode, pentode, It looks to me like it will start clipping quite early , giving not much volume adjustability. wwo, tgg, jjx, pol, tdq, eum, bwt, lgv, tkt, xhz, rfl, dbq, zye, bgs, lbh,