Cathode bias is mostly used in low cost valve amps that function from a 300V to 400V B+ supply. Any quetions and concerns please feel free to contact us. Two EL34 power tubes, two 6SL7 small signal tubes, and one 5AR4 rectifier. 6SN7, 5687,12AU7, 6DJ8etc. We carry premium hand selected vacuum tubes for guitar and HiFi amps. pl is a Internet shop offering Tube output transformers and others - Check out our offer! TTG-EL34PSE - Tube output UL transformer [1,65kOhm] EL34 / 6L6 PSE. Do you know ? well ,show you how to build up single ended amplifier El34,KT88,6550,6L6 and DHT because Build up 300B Single Ended Amplifier is very difficults and get good Audio Transformer and expensive but even if use high quality audio transformer like Tango XE20S ,will be get good tone from KT88 Single Ended Amplifier. TO11C Heyboer paper stick wound interleaved output transformer. All tubes, except EL34, have DC stabilised heater circuits to reduce hum noise to a near in-audible minimum. I have seen the schematic online as well if you did want to have a look over it. Excellent choice for a 6L6 or EL34 single-ended amp using either a 4 or an 8 ohm speaker load. Finding Unknown Values for Output Transformers (A little Math is required) If you have an Output Transformer with unknown values and want to find the intended speaker impedance for a given tube type there are several things to consider. The biggest reason that the Widlar style is not so popular for the tube amp is the output transformer. My output transformer right now is a. Stereo, Class A, Single End Input power: 110V and 220V are both available Output power: 12W2 (ultra linear connection). Shop with confidence. OUTPUT PENTODE EL34 OUTPUT PENTODE EL34 1056-16. 2 PP 100W Tube Output Transformer KT88 EL34 KT 88. This is your Plate Voltage. This is a larger, multi-purpose version of the original single ended, 5W output transformer used in Champ**, Tweed Princeton**, Vibro-Champ**, Harvard** and Bronco** style amplifiers. The T-1800 mk2 is an EL34 powered push pull design boasting 40 WPC with remote, SE and XLR inputs, and custom permalloy output transformers. The output power is around 3Wrms with 6L6 and 8Wrms with KT-88. Puts out about 70W, according to Philips. I saw some Tango, Tamura and some Hammond SE OPT has this screen tap for the UL design but I think it's rare and selectively made for a few impedances. » Marshall® output transformer 20W Power Amp EL84 20/20. The core construction reduces distortion and reduces the stray magnetic field. 4/8/6 ohm secondary taps. Laochen EL34 Single-ended Tube Amplifier HIFI EXQUIS AIQIN Class A handmade lamp amp Silver version OCEL34S OldChen - Luxury version use better electronic component, (please - Category: Single-ended el34 amp - Price: $ 191. I guess depend on 6550's plate current made up good sound than 300B SE. The needed results of many years of experience. 5k se audio output transformers (pair) for el34, 6l6gc. Cheap Output Transformers The output transformer in a valve guitar amplifier is perhaps the most difficult component to obtain if you are building, or to replace in repair, but there may be an answer closer than you think. Power Supply - this is really covered in #1, but it's fair to mention it. He has a life-long experience from different sound recording and reproduction equipment. I employed lag-lead compensator to reject this issue. There are some who have told me (a few rather forcefully) that this amplifier can’t sound as good as I and others say, simply due to the output transformer. You would need a separate filament transformer to handle that load. Modern EL34's have questionable reliability at such high voltages, so it would be wise to restrict ourselves to an HT of less than 500V. The entire base is not actually metal. The last one I had to run 520V on the plates to get my 50Watts out of a pair of EL34. Designed for drop in replacement of original Transformers & Chokes our stock have a similar look & design specifications for that vintage tone & feel! Welcome to TubeDepot Javascript must be enabled to use this site. Edcor lists this transformer as having a frequency range of 70Hz to 18kHz (<1dB). EL34 UL SE would have given more than 12W depends on the B+ voltage and the driver circuit. Idle current matching is important for output transformer current balance. They were never soldered to or mounted or used in anyway. For a larger view click on the thumbnail. Theoretically, the change of output transformer would double the output, making it a powerful amp indeed. Sansui Tube Transformers Reproduction - The 1000A Transformers - The AU-70 Transformers - The AU-111 Transformers - Any other Sansui Transformers * Please e-mail us at [email protected] Output Tube:4 x 6CA7 / EL34. Not only has the chassis been changed considerably from the early steel variety, but the circuit design has changed as well, as has the topology of the output transformer. According to our foremost researcher on tube transformers, Menno Vanderveen (from the Netherlands and designer for companies like Plitron), the major shortcoming of tube output transformers is the lack of Permeability at low signal levels, leading to lack of resolution in a similar way to DACs (Digital to Analog Converters) suffer from at low. This is an assembled board of a singled-ended(SE) output tube stereo amplifier. the results are shown in Table 1 under the conditions of a specialist VDV-2100-CFB/H toroidal output transformer, a high supply voltage of 450V (at maximum power output), and a quiescent current of 45mA per EL34 pentode tube. What this means to you is the output tansformers are not a limiting factor so no design compromises are needed to compensate. This novel arrangement provides an accurately balanced. Makes sense, since it’s the one component that translates the electrical signal from the output tubes to one that the speaker can pump into sound waves in the air, which your ears finally hear. 6l6gc, 5881, el34, 6550b, kt88 Notes: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. 35 (66-36). This is our 6 watt single-ended triode amp using the popular EL34 output tube. Here is a brief list of the improvements on MP-301 MK3 Deluxe Version. A wide variety of el34 output transformer options are available to you, There are 6 el34 output transformer suppliers, mainly located in Asia. Notes: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. They will provide increased headroom and clarity when used with single 6V6 and EL34 stages. The Axiom O45JT-C output offers 8 & 16 ohm secondary taps. Transformers are the most expensive components in an amplifier, so manufacturers save money by using 'off the shelf' units available on the market. Guytronix stands poised and ready to assist the builder throughout the assembly process. When using 6V6 tubes and a 16 ohm speaker you would use the 8 ohm speaker tap. High voltage designs. Parafeed designs. Atarashi used the largest Hashimoto Push-Pull output transformer, the HW100-5, along with Hashimoto PT-400B Power Transformer and Hashimoto C-10-200W Choke Coil. Transformers for Marshall Amplifiers. The output transformer must be able to handle the output power without major losses and distortions, over the intended frequency range. We offer PP output transformers potted into black boxes of black colour (powder colouring) or not potted. This project started out to be a design using 12AX7’s and EL34’s, but when I went scratching through the junk box I could not find any EL34’s so decided to use what I had. High voltage power transformer and low voltage heater transformer also. I have seen the schematic online as well if you did want to have a look over it. The Axiom O45JT-C output offers 8 & 16 ohm secondary taps. The entire base is not actually metal. Puts out about 70W, according to Philips. It’s the bridge between the output section of the amplifier and your speaker cabinet. Output transformers. This achieves the modest gain required along with very low output impedance. This is a larger, multi-purpose version of the original single ended, 5W output transformer used in Champ**, Tweed Princeton**, Vibro-Champ**, Harvard** and Bronco** style amplifiers. Key features of the Allnic Audio T-1800 mk2 stereo integrated amplifier : • In response to overwhelming demand, KS Park designed and manufactured our latest integrated amplifier, the T-1800 mk2. Beefed up transformer set and power supply for use with 6L6/EL34 power tube and addition of MID/RAW control. The unit is based on 4x EL84 output tubes, and one ECC83 driver tube. Transformers for Marshall Amplifiers. Its relatively high power. As output transformer has been choiced the Lundahl LL1627/185mA with secondaries connected in B configuration to have a primary load impedence of 2. Amplifier schematic and circuit description. i am in the market for a 2k -3k amp and saw an old marantz 8b in that price range. Huge Collection of Windows, Doors, and Salvage. The tubes, transformers, and speakers all lived long and fruitful lives. All tubes, except EL34, have DC stabilised heater circuits to reduce hum noise to a near in-audible minimum. 0 Channel Class A Stereo Amp 12W HiFi Linear Regulated Power Supply DC12V+USB5 V Output. Hammond Output Transformer 1627SEA Great iron for building high end audio single-ended tube amps with 300B, 2A3, 6A3 6B4G etc. but lets me show you KT88/6550/EL34/KT77/ Compatible Single Ended Amplifier. That transformer came from my search for an output transformer for my PP-18 amp kit (a stripped-down version of the classic Marshall 18W amp of the '60s). Hammond doesn't seem to have anything that will handle the filament current of 6 EL34 plus the preamp tubes in a combination power transformer (the output tubes alone are 6 x 1. Power supply - full wave vacuum tube rectification (315V-0-315V), with imported SiFe cores as power and choke (CLC power supply), with imported Philips or Rubycon (may vary) power supply. Frequency response 30 Hz. black cover 2 2 of 3 3. A range of Push-Pull Output Transformers for Valve Power Amplifiers. PRIMALUNA PROLOGUE CLASSIC Suggested retail prices - black or silver finish with EL34 tubes: Euro 1795 -with KT88 tubes: Euro 2095 Is there such a thing as an integrated tube amplifier costing less than 1800 Euro that is reliable, brings great listening pleasure, works with all kinds of speakers and sources and is endowed with a wide. line voltage at maximum signal. Transformer manufacturers generally state that an output transformer will show 'x' primary impedance with 'y' secondary load. The needed results of many years of experience. ECONOMICAL VALVE BASED AUDIO POWER AMPLIFIER. Moreover, they can be made significantly smaller for the same output power, which reduces cost, weight, and inter-winding capacitance. EL34/6L6GC UL Mini Single Ended Amplifier's schematic replaced power transformer more big one finally connected as Triode with EL34, KT88/6550 sound like EL156/KT88 SE Amplifier triode connection. The MP-401 MK3 is the latest upgrade version of MP-401 tube amplifier which was first released in 2008. Not sure of the exact vintage. This factory matched pair of 90mA, 20W James Audio JS-6223HS power output transformers is recommended for DIY push-pull tube amplifiers built for tube types that can run at 3. This is the beginning of what is the second phase of a greater project going back several years, that being the initial salvaging of this amplifier after being found stored in a Florida attic for over 40 years. Universal Push Pull Tube Output Transformers. Designed for EL34, 6L6 and other tubes. The RH45 (standalone version) would require a 5k-6k output transformer. Using EL34 on a 6L6 transformer isn't going to net you the same output power, but the tubes shouldn't mind. Find great deals on eBay for output transformer el84. The EL34 tube was used in the most common amplifier sold in the US: the Dynaco ST 70. This is the improved Push-Pull Mullard EL34 tube amplifier circuit. This project started out to be a design using 12AX7’s and EL34’s, but when I went scratching through the junk box I could not find any EL34’s so decided to use what I had. OUTPUT PENTODE EL34 OUTPUT PENTODE EL34 1056-16. You would need a separate filament transformer to handle that load. Output transformers suitable for operation in Single Ended mode, predestined to work with vacuum tube in a single-ended topology, are produced based on EI or CC cores, with a slit (a gap). Mesa Boogie's patent number 7,173,488 describes a simple technique to enable a push-pull transformer to operate in single-ended mode while maintaining zero net plate current through the transformer core. 5Wrms with 6550/KT88. Some I didn't write up and post. TOROIDALTRANSFORMER. Shopping for Cheap Single-Ended output transformer at HIFI EXQUIS and more from hifi exquis,tube amp,tube amp output transformer on Aliexpress. This is an assembled board of a singled-ended(SE) output tube stereo amplifier. EL34 Single Ended Class A vacuum tube stereo amplifier. Construction. Cheap Output Transformers The output transformer in a valve guitar amplifier is perhaps the most difficult component to obtain if you are building, or to replace in repair, but there may be an answer closer than you think. This factory matched pair of 90mA, 20W James Audio JS-6223HS power output transformers is recommended for DIY push-pull tube amplifiers built for tube types that can run at 3. Find great deals on eBay for el34 push pull. 4/8/6 ohm secondary taps. ) will change optimum plate to plate load impedance. Questions: Have you looked at toroidals and why did you choose a 33% screen tap as. Atarashi used the largest Hashimoto Push-Pull output transformer, the HW100-5, along with Hashimoto PT-400B Power Transformer and Hashimoto C-10-200W Choke Coil. A tube manual or tube manufacturer's technical data sheets should be consulted first, before making a decision on a proper output transformer. mains operated equipment. Edcor Seemingly most appropriate transformer. The output stage can be switched between Triode and Ultra Linear mode and either KT88 or EL34 tubes can be used for the maximum amount of flexibility. The core construction reduces distortion and reduces the stray magnetic field. IWISTAO Tube Amplifier Output Transformer 5W Z11 Single-ended Silicon Steel EI Audio HIFI DIY Más información Encuentra este Pin y muchos más en Valve amps , de Fernando Lopez. and small transformer so does not get good low edge. The plates are welded with two horizontal slits in the center of the plate. Few people working in transformer winding companies have a knowledge of electronics or valve amps. A wide variety of el34 output transformer options are available to you, There are 6 el34 output transformer suppliers, mainly located in Asia. TP24 power transformer is made in Chicago. They are so satisfied with our products and order from us all the. It has a low primary impedance and a high primary current capability, making it suitable for use with low-impedance triodes or pentodes. OUTPUT PENTODEOutput pentode rated for 25W anode dissipation,ntended for use in a. Reisong Boyuu A10 EL34 Bube Amplifier HIFI PCB version is a standard version , with 2x output transformers size 66x36 Handmade version is a Luxury version , with 2x output transformer size 76x40, inside components are soldering by hand, easily to upgrade Handmade without tube version is same than Handmade version, but without power tube el34 and rectifier 5z4p, but the preamp tube 6n2 is. When using an 8 ohm speaker you would need to use a 4 ohm speaker tap. cathode self-biased circuit is used in EL34 output stage so that bias adjustment is prevented as the tube grows older or another tube is put into use. EL34 Single Ended Class A vacuum tube stereo amplifier. Specifications Output 8 W Primary Impedance 4,000 to 9,000 Ω Mounting Centers 2. When the EL34 tube is pushed too hard it generates an excessive amount of distortion, which is good for rock & roll guitar amplifiers, but not for high-end audio amplifiers. This is the improved Push-Pull Mullard EL34 tube amplifier circuit. To the right are a schematic (above) and a diagram for a possible layout which is about 20 Watts, with a 6. Browse our latest audio-transformers offers. It has a primary impedance of 3400ct. Call or Email to check feasability. This is possibly the last remaining Brand New in the Box LS-35 pair in existe. I started building P_P screen tapped amps with EL34′s and 5881′s back in the late sixties. OUTPUT TRANSFORMER. My output transformer right now is a. The audio transformers inMADout are handmade. How you operate the tubes (push-pull, push-pull parallel, ultra-linear, class, B+, bias, operating points, etc. Most output valves in HiFi valve amps (40 Watt and less) are Cathode biased in the same way that pre-amp valves are biased. Higher quality input and output selection switches. Transformer manufacturers generally state that an output transformer will show 'x' primary impedance with 'y' secondary load. Grand Stack version with more iron, thus more power, more bass and finally more tone! 60Hz - 25KHz +-1. This transformer was specifically designed for EL34 tubes, under conditions of maximum power output with minimum distortion. com ,the Leading Trading Marketplace from China. Browse our latest audio-transformers offers. We have packaged the kit options at a very reasonable price to allow users to experience the wonderful aspects of the EL34 tube. Then I spent many days looking into various phase inverter and driver configurations, again many I didn't post. All transformers have a limited warranty according technical specifications during 12 months from the date of receiving. Alexander Kitic SE amplifier with the impressive 813 beam tetrode tubes and Lundahl LL1688 output transformers. It will be evident that if the Screen-Grid is to be supplied with a DC voltage of only 43% of the Anode voltage, then a separate winding is needed for the Screen-Grid connection. The output transformer must be able to handle the output power without major losses and distortions, over the intended frequency range. Designs to 100 watts. ) decided to switch to 6550 output tubes in favor of the EL34's. Homemade EL34/6ca7 Push Pull Tube amplifier with DIY Ultra linear Hi-Fi Output transformers. To help explain this, refer to figure 1 below. A tube manual or tube manufacturer's technical data sheets should be consulted first, before making a decision on a proper output transformer. Excellent choice for a 6L6 or EL34 single-ended amp using either a 4 or an 8 ohm speaker load. HX-6530EG is an OPT for tube Hi Fi amplifiers. 5k se audio output transformers (pair) for el34, 6l6gc. atarashi mentioned in his article that EL34 could yield the most musical sound among the modern high-power tubes. Each EL34B can be seperately adjusted on negative feedback 2. 2 PP 100W Tube Output Transformer KT88 EL34 KT 88 - $1,284. And a low cost step down transformer as an output transformer. Heyboer Output transformer for older style 100 watt Marshall's. We have packaged the kit options at a very reasonable price to allow users to experience the wonderful aspects of the EL34 tube. The top supplying country is China (Mainland), which supply 100% of el34 output transformer respectively. To the people who are dealing with audio Thanks for visiting Mableaudio! We stock all kinds of amp parts you want. Honour, we appreciate you very much. This is an assembled board of a singled-ended(SE) output tube stereo amplifier. Using 6L6’s as our example, the primary impedance recommended has been 10k-ohms, 6600-ohms, and 3800-ohms. This was removed from a working guitar amplifier. Double C core. Tube power amplifier circuit is very simple relatively, but if you use output transformer that is produced by different manufacturers to make tube amplifier, the difference of sound is great. They were never soldered to or mounted or used in anyway. TubesForAmps is your source for replacement vacuum tubes. PROLOGUE CLASSIC OUTPUT TRANSFORMERS. 2K-6K:0-4-8Ω Output Transformer OPT 6P3 6P6 EL84 EL34 Tube Amplifier $25. twice of power of 2A3 SE. This topology is widely used for tube amplifiers. The output transformer as an impedance matching device, works on the principal of reflected load. Medium Power Output: EL34, 6L6. A typical setup of an EL34 output w/ 12AX7 or 12AU7 input tubes generally produce power anywhere from 35-50 WPC and KT88 (which some amps are switchable) can run onwards of another 10 watts or so. This novel arrangement provides an accurately balanced. 4VA 50/60HZ 186E12. It is the same physical size as my TO22 transformer. Sometimes, you don't have to choose 1 or the other. Huge Collection of Windows, Doors, and Salvage. For the output transformers I chose the Lundahl LL1627/185mA with secondaries connected in B configuration to have a primary load impedence of 2. TRANSFORMERS Tube Amplifier Output Transformers LL1620 , LL1623, LL1627, LL9202 The LL1620, LL1623, LL1627 and LL9202 are output transformers for tube amplifiers. 1uf 630V, T1=Audio Transformer for 2x EL34 Push Pull. The output transformer has a pole at 100 to 200kHz with second order complex pole. You may also like. • New output transformers with extended frequency range increase the bandwidth of the output signal. 0% Financing and Free Shipping on thousands of items!. The product is enclosed in the square case on the left. The maximum power of such transformers is 100 W. To purchase any of these transformers, please contact us at [email protected] Here are pictures of the last set of output transformers. Chassis - stainless steel, double layered design, no-minimal surface screws. the resistor One has 4 x EL34 output tubes (Superbass) , the other only has 2 x EL34. Designed for EL34, 6L6 and other tubes. Tube Amp Power Transformer Current Draw Calculator JavaScript must be enabled in order for the calculations to work. Perfectly wound and custom voltages to keep the tube life long play. 35 (66-36). Mullard Original Metal Based (Philips) Metal based: This is the original EL34. This is your Plate Voltage. PrimaLuna output transformers are custom-designed, wound in-house, and massive. The unit is based on 4x EL84 output tubes, and one ECC83 driver tube. Class A Single Ended operation represents the simplest and purist circuit possible. EL34 has a reflected load of 2KOhm, so I need to find coresponding transformers. Aiqin EL34 output trans questions: Schematic fo the amp 2. Brand new hand wired EL34 tube amplifier. us for product availability and pricing and pricing [ Home. Output transformer windings must be capable of handling the peak signal condition Plate and Screen-grid DC currents respectively. Modern EL34's have questionable reliability at such high voltages, so it would be wise to restrict ourselves to an HT of less than 500V. These are paper layer wound output transformers like the vintage originals to provide that ultimate tone!. If they look new, then they probably are 6V or 12V mains transformers (which in themselves can be useful) but some old mains-to-6. The core construction reduces distortion and reduces the stray magnetic field. Shiny Eyes SE UL EL34-6SL7 tube amplifier. Satisfaction Guaranteed. Output Transformer: using high-quality plate and stretched transformer cover and JAPAN ultra-thin pure wood insulating paper. UBT-1 Single-Ended Audio Output Transformer Description The UBT-1 is a single-ended output transformer intended to be used in high-fidelity vacuum-tube audio amplifiers. no the AO44 is a push pull type amp it uses 2x ecl86 tubes but any output transformer that is push pull type and works for 2 EL84 tubes (ecl86 has 1/2 of a 12ax7 and 1 el84 in 1 tube) should work i think Hammond universal push pull 8w would work plus offer different speaker outputs, the Ao44 was 8ohm speaker only. Makes sense, since it’s the one component that translates the electrical signal from the output tubes to one that the speaker can pump into sound waves in the air, which your ears finally hear. at full rated power (± 1 db max. Used and in good condition. 35mm lamination potted Output transformer. 4VA 50/60HZ 186E12. Differ in pairs of transformers no more than 5 % on all measured parametres. Designed for push-pull tube output circuits. She loves to date DeVore speakers and is looking for a long term. Toroidal Transformer ONLINE SHOP. Proper output transformer design is crucial to the success of an audiophile quality amplifier. Frequency response 30 Hz. Transformer - Output, 8 W. many 300B SE does't. 2019 Factory El34 6p3p 6v6 Tube Amplifier Output Transformer , Find Complete Details about 2019 Factory El34 6p3p 6v6 Tube Amplifier Output Transformer,2019 Factory El34 Output Transformer,2019 Factory El34 6p3p 6v6 Output Transformer,El34 6p3p 6v6 Tube Amplifier Output Transformer from Transformers Supplier or Manufacturer-Shenzhen Hanlongjia Technology Co. The only items were original was the power transformer and two Ecaps, which still tested good. Homemade EL34/6ca7 Push Pull Tube amplifier with DIY Ultra linear Hi-Fi Output transformers. As output transformer has been choiced the Lundahl LL1627/185mA with secondaries connected in B configuration to have a primary load impedence of 2. The size, design and quality of the output transformer (OT) play a significant part in tone shaping. Up for sale is a Brand New NOS NIB pair of UTC LS-35 series Output Transformers for push pull EL34, 300B, or 2A3 tubes. 4K available from the Edcor web site. I am planning to send a circuit with only driver transformer and single ended output class AB push pull soon, which will be reliable and easy for amatures to construct, who normally blow quite a few power transistors before success. Output transformer SE (single ended) 1x6V6, 4, 8, 16 Ohms. The primary inductance of RX-40-5 audio output transformer is very large, being 290H at minimum and 640H at maximum. 6l6gc, 5881, el34, 6550b, kt88 Notes: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. A and true Hi-Fi wide band transformers. Hammond Output Transformer 1627SEA Great iron for building high end audio single-ended tube amps with 300B, 2A3, 6A3 6B4G etc. So if you change the speaker load on the secondary winding, that automatically changes the reflected load seen at the primary. This high-quality single-ended JJ EL34 output stage has great performance wide frequency with ENIGMAcoustics IE-core output transformer. In reality, the power is less than doubled although it exceeds the 115-120 watts produced by later EL34 amps. When using 6V6 tubes and a 16 ohm speaker you would use the 8 ohm speaker tap. very clear but output transformer are small 7 Wrms so I got around 6. Output transformers - quality here makes a very big difference in smoothness and extended response. Supports various output tubes. Designed for push-pull tube output circuits. The Silver Luna integrated valve amplifier from Polish company Fezz Audio uses EL34 tubes and costs £725 in Poland (and 1700,00 Eur for PRESTIGE export version) , which is something of a budget price for tube amp. Fixing centres for the U-clamp mounting feet are 96mm apart. CUSTOM SUPER-WIDE-BANDWIDTH OUTPUT TRANSFORMERS. High quality power switch. The robust transformer can support tubes with higher heater current requirements such as the KT88 series including the KT120 and KT150. A typical setup of an EL34 output w/ 12AX7 or 12AU7 input tubes generally produce power anywhere from 35-50 WPC and KT88 (which some amps are switchable) can run onwards of another 10 watts or so. Browse l transformers available for sale here. com All Electra-Print transformers and amplifiers are 100% made in the USA. The output transformers have 4200 ohm primaries, 40% ultralinear screen taps and are 3 7/8" tall, 3 1/4" wide and 3 1/8" deep (about 1/2" taller, 3/8" wider and 1/4" deeper than a stock A-470 output transformer). Hammond output transf. el34b x4 ----- el34,el34a,kt88,kt100. As output transformer has been choiced the Lundahl LL1627/185mA with secondaries connected in B configuration to have a primary load impedence of 2. 5k se audio output transformers (pair) for el34, 6l6gc. Our DiaLogue Class components feature the largest, widest-bandwidth output transformers we've ever made. 6l6gc, 5881, el34, 6550b, kt88 Notes: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. Here is a brief list of the improvements on MP-301 MK3 Deluxe Version. Amplifiers are described with output powers ranging from 10 to 100 Watt. for Marshall 100W, used since 1966 for. UBT-1 Single-Ended Audio Output Transformer Description The UBT-1 is a single-ended output transformer intended to be used in high-fidelity vacuum-tube audio amplifiers. They claim that it can be used with 6l6 or EL34 output tubes. The EAR 868 is a fully balanced, transformer-coupled design, offering balanced and single-ended connections at input and output. Assuming the output stage operates in class A or AB, the impedance seen by either tube is half the anode-to-anode impedance under small signal conditions. The output transformer will usually be specified in terms of its anode-to-anode impedance, which might be 3. Not only has the chassis been changed considerably from the early steel variety, but the circuit design has changed as well, as has the topology of the output transformer. V78A01F 25W valve output transformers are constructed with a grain orientated steel core. 2K-6K:0-4-8Ω Output Transformer OPT 6P3 6P6 EL84 EL34 Tube Amplifier $25. at full rated power (+/- 1. Semi-automatic bias adjustment system supports 6L6GC series (KT66, etc), KT88 series (6551, KT90, etc), as well as the default EL34 series (6CA7, KT77, etc) tubes. TU34M51-3pins push-pull (2 tubes EL34) 3,4K ohm 60W Marshall JCM600, JCM900, JCM2000 TU84PK-1 push-pull (2 tubes 6V6) 8K ohm 25W Ferder Type: TUJTM45-3. If you see your amp here and some of the information is missing feel. The EAR 868 is a fully balanced, transformer-coupled design, offering balanced and single-ended connections at input and output. It's the magnetic field in the core that transfers the power from primary to secondary. Required equipment: Signal Generator, Multi Meter (VOM),1/4 inch phono plug and Calculator. Output transformer - heart of a tube amplifier, for high end edition, comes with transformer case with potting compounding for shielding, protection and look. Which uses a driver transformer for phase splitting and output transformer for impedance matching. The custom designed and manufactured EL34 IE-Core output transformers or our impressive double C-Cores are at the heart of the system extending the quality of the entire audio spectrum to extraordinary levels. Modern EL34's have questionable reliability at such high voltages, so it would be wise to restrict ourselves to an HT of less than 500V. Shop with confidence on eBay!. This causes a net DC current of zero, and thus, a net zero magnetization in the output transformer core. Tubes - from input to output, these are a bit like spices in a soup. Browse l transformers available for sale here. Grand Stack version with more iron, thus more power, more bass and finally more tone! 60Hz - 25KHz +-1. The recommended connection in most cases produces the best overall performance with the particular transformer cited. ISO-Tango has made a restart and now use the name : ISO Transformers. About 2% of these are transformers. OUTPUT TRANSFORMER. (See disclaimer below) Following these steps you can measure the primary impedance of your output transformer without removing the chassis from the cabinet. Go to vouchers >>. The primary inductance of RX-40-5 audio output transformer is very large, being 290H at minimum and 640H at maximum. These are paper layer wound output transformers like the vintage originals to provide that ultimate tone!. When it comes to output transformers for the JTM45 amp, Mercury Magnetics offers a plethora of options beyond the stock, cloned, vintage replacement. Most output transformers are oversized and use finest core materials. The new output transformer is being built at Heyboer Transformer Co. Whoever said that turntables and valve amplifiers were. Transformer winding is an extension of the fitting and turning industry. I spent several months and more than a little money finding the best output transformer. Amplifiers are described with output powers ranging from 10 to 100 Watt. EL34, KT88) in the parallel push-pull (PPP) configuration (e. About 2% of these are transformers. I agree, 3k4 is a better match, but 3k8 would be better still. A and true Hi-Fi wide band transformers. I know a lot of people hate el34's in these amps, but I love el34's in general. Modern EL34's have questionable reliability at such high voltages, so it would be wise to restrict ourselves to an HT of less than 500V. Enclosed (shielded), 4 slot, above chassis Type 'X' mounting.