El34 Output Transformer

Schematics by Aqua Blue is now collected in a separate list. 00 shipping. 5S,XE-60-5SFN. Audion Sterling Anniversary integrated stereo is hard wired point to point using better graded components and & larger Audion wound output transformers (EI96) & hand built. Tested ! see pictures. This novel arrangement provides an accurately balanced. 125 Inch) EI114(4. 0 (1 votes) Store: Zhifeng D electron Store US $66. Triad HSM-190 Output Transformer. OEP R120A15F - 10W Single Ended Audio /Output Transformer for EL34 Valve / Tube Amplifiers Oxford Electrical Products ( OEP) - design and manufacture in Oxford, England. Tokyo, Japan Possibly One of the Best Sounding Output Transformers Ever Built As Good as Tamura or Tango, or Better With 21st Technologies Based on 60 years of Sansui Experiences. This type of transformer can be used with many tube types, such as 6550, KT88, KT90, 6CA7/EL34, 300B, 2A3, 6B4 or push-pull parallel 6BQ5/EL84 & 6V6-GT. Excellent choice for a 6L6 or EL34 single-ended amp using either a 4 or an 8 ohm speaker load. The EL34 35W stereo amplifier from ANK Audiokits provides some of the finest EL34 amplication available today. This transformer delivers 25 watts of pure sine wave output power into 16 Ohms in the original circuit. KT66 output tubes. Model: Current Pri: Impedance Pri B-P: Impedance Secondary: Frequency Responce: Recomended Tubes: JS-3002N: 50mA: 2. EL34 has a reflected load of 2KOhm, so I need to find coresponding transformers. 6 which means that the turns ratio is 31. Excellent choice for a 6L6 or EL34 single-ended amp using either a 4 or an 8 ohm speaker load. And even worst, I unable to find 2. It has an international octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits and was designed to be suitable as a series regulator by virtue of its high permissible voltage between heater and cathode and other parameters. How to bias your tube guitar amplifier. This is the improved Push-Pull Mullard EL34 tube amplifier circuit. (For Class AB and a solid state rectifier there is little sag at idle. so each EL34 will have a load of only 2300 * 4 = 9200ohm. com offers 530 tube output transformers products. 5KOhm for a pair of EL34, but we are only considering one half of the output stage. Besides Hashimoto HW-25-8 output transformer, PT-270 power transformer, and C-15-200CH choke coil, Mr. You can set the conditions for storage and. Primary Ra 2000 ohms. The output transformer has two separate winds of wire, basically an input side and an output side. 4 x EL84, 6V6. This type of transformer can be used with many tube types, such as pairs of 807, 6L6, KT66, EL34, push-pull parallel (quads) of 6V6's or EL84 and others. You can see the holes for the bias adjustments near each EL34 socket, and the bias test points between the output transformers. 36W push pull output transformer Designed for amps with 4xEL84; 4k ohms primary, 8 & 16 ohm outputs, ideal for AC-30 builds This transformer is a natural step-up from OT02 (which was designed for 2xEL84s and 18W of power): it's designed for four EL84s running in push-pull, and was specified to suit the Amp Maker PP-36 amp kit. Power = Voltage 2 /Impedance, so Voltage = √(Power * Impedance) = √(12w*5kΩ) = ~245vdc 25w / 245v = 102mA idle plate current (!). Accessories price:$69. Great for 8kct to 8 ohm for hi fie, or 4kct to 4 ohm for guitar amps. With limited numbers of valve Types being made the octal based valve adds to the aesthetic of the amplifier. Also, these feature 5K and 8K Ohm primary impedances and 4/8/16 Ohm secondary impedances. Lead connection is via 10 bottom mounted lugs. 94; Buy It Now +C $28. In common with all 'E' prefix tubes, using the Mullard–Philips tube designation, the EL34 has a heater voltage of 6. This ensures minimal distortion and low insertion loss. *2 This OT is from a Carlsbro amp and is used with EL34 tubes. 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. Setting your bias using the shunt method for a specific plate dissipation. Primary Ra 2000 ohms. Our output transformers are all hand-wound righ. Mains transformers Output transformers Output Transf. The 345-0-345 volt RMS power transformer creates 488VDC if there is no load or rectifier loss. 125 Inch) EI114(4. And a low cost step down transformer as an output transformer. Output transformer SE (single ended) 1x6V6, 4, 8, 16 Ohms. for Fender Output Transf. Output transformer, PushPull, EL34, tube, PP. 0 (3) 6 Orders. The EL34 is a thermionic valve or vacuum tube of the power pentode type. Output transformer, PushPull, EL34, tube, PP. Triad HSM-190 Output Transformer. A new Overture with substantial improvements. 35EI) annealed silicon steel dedicated audio sheets, high quality oxygen-free coppe. The EL34 is a thermionic valve or vacuum tube of the power pentode type. This is a single-ended (non-push pull) amp that uses an EL34. EL84's draw. (For Class AB and a solid state rectifier there is little sag at idle. If the values of C103 and R107 and R108 are wrong (too low of capacitance to bypass bass frequencies; too high of resistances will have less current in the EL34 and too high of a plate resistance to drive the output transformer inductance). 120W 6P1 6P14 6P6P 6P3P EL34 KT66 KT88 Single End Tube Amp Power Transformer: GDOP002. 20 results for output transformer el84 Save output transformer el84 to get e-mail alerts and updates on your eBay Feed. Triple XXX — four 6L6 or EL34 tubes — 4, 8 & 16 Ohm taps — Upgrade! — Available with Universal Transformer Mount (UTM) $ 308. 6CA7/EL34, 6L6, KT66, etc. The output transformer is the heart of a valve amplifier. Transformers and output Transformers. Power: 160W; Core 96x50, 32 (tongue width). Not only does it have larger power transformer, but it also features larger output transformers and is biased to handle 6L6's, EL34's and 6V6's without. Genuine Marshall Transformers, Marshall Power Transformer, Marshall Output Transformer, NOS, Marshall MG100RCD, MG80RCD Power Transformer, PT9661 Submitted by gpadmin1 on Thu, 05/17/2012 - 00:53. 35 import audio special cold-rolled silicon steel high silicon, permeability. Latest Update to this page :- August 2107. Enter then the Fezz Audio (A newly formed division of Toroidy. If you had to make use of the output transformer, a single EL34 might give you as much as 12w output in a perfect world. Universal Push-Pull types can be used in Triode, 20% Ultra Linear and 43% Ultra Linear. at full rated power (± 1 db max. This novel arrangement provides an accurately balanced. However, this is very common parts for electronic DIY. The one thing im stuck on is the output transformer, according to the datasheet I need to get a 3500-4000 ohm transformer with a 4 ohm output to power a car speaker I have. Top of the chassis before the PC board was installed. appropriate for the approximate amp wattage. 2 x EL34, 6L6, KT66, 807. Using EL34 on a 6L6 transformer isn't going to net you the same output power, but the tubes shouldn't mind. 4) and an output transformer. OEP R120A15F - 10W Single Ended Audio /Output Transformer for EL34 Valve / Tube Amplifiers Oxford Electrical Products ( OEP) - design and manufacture in Oxford, England. 0 (1 votes) Store: Zhifeng D electron Store US $116. 1 Khz) minimum. For a Class A amplifier where no grid current is drawn by the output valve a single triode would have been adequate. It is used to couple the vacuum tube and Continue Reading →. 4) and an output transformer. EL34, 6550, KT88 dual mono blocks: 280W: 1650W: 711 plate + 167S6: 6x 6550, KT88 dual mono blocks. Enclosed (shielded), 4 slot, above chassis Type 'X' mounting. Blending the high power output of Pentode EL34, with Triode's iconic richness in musicality. By maintaining a close control over manufacture, OEP ensure that each transformer is manufactured to the very strict specification that their designer intended. 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. fluxion OPT HX-8018AF, audio output transformer for EL34 6CA7 6L6 6V6 6BQ5 DIY tube amplifiers. It features 4/8/16 Ohm taps with a buried 100V tap. Alternative Ra or HT figures can be supplied. Some transformers are really excellent when used in triode / pseudo triode applications while others perform better in Ultra-linear (partial triode to the British amongst you) or a combination of UL and cathode coupling. 30 shipping; From Taiwan; Audio output transformer for Single-ended Tube amp! EL84 / 6L6 / 6V6 / EL34! NOS. After incorporating these models into my LTspice netlist, I was able to simulate the. fluxion OPT HX-8018AF, audio output transformer for EL34 6CA7 6L6 6V6 6BQ5 DIY tube amplifiers. The EL34 produces low-frequency extension that easily walks away from the 300B. The EL34-B output valve stage has local negative feedback to the screen from the output transformer. Units are designed to provide ample "headroom" at bass. Between 2008 and now, 2017, I sold most of the popular OPTs for PP KT8 but I still have 90% of the many. Ending Tuesday at 12:57PM PST. EL34 Power Pentode T he Svetlana™ EL34 is a glass power pentode having a standard octal base and glass envelope. These Partridge WWFB transformers are the top for for KT88, KT66, EL34 amplifiers. 00 shipping. Call or Email to check feasability. FANTASTIC SOUND !!! ULTRA LINEAR. Tube output transformers(19) Push-pull(6) Single Ended(5) Parallel Single Ended(3) Cathode Feedback PP(5) Power transformers(278) Transformers for tubes(57) Waterproof isolating transformers(11) Isolating transformers(44) Variable Autotransformes(5) Speed controllers(5) Three-phase transformers(48) Chassis and accessories for DIY AUDIO(26). Schematics by Aqua Blue is now collected in a separate list. The same time, ENIGMAcoustcis Labs starts to design output transformer by his own and the result is so satisfactory comparing to Sowter transformer. i just don't understand why. 35EI) annealed silicon steel dedicated audio sheets, high quality oxygen-free copper wire coil package, and use pure pulp insulating paper between each. Atarashi used his Studer A730 CD player for the testing input source. pl is a Internet shop offering TTG-EL34SE - Tube output UL transformer [3,2kOhm] EL34 / 6L6 SE and others - Check out our offer! Toroidal output transformer for Single Ended EL34 / 6L6 or similar with UL tap. These replace transformers in the 8kct to 4kct range. This novel arrangement provides an accurately balanced. The output transformers were shot, so we installed a pair of brand new 35W Hammonds in place. Potting type output transformer, to ensure the stability and reliability of the output transformer, especially in the southern humid places, have a more reliable performance. Universal Push-Pull types can be used in Triode, 20% Ultra Linear and 43% Ultra Linear. The output transformer must have a UL mode tap if you intend to use UL. Let's say the resistance is 41 ohms from the center tap to pin 3 on both sides. 28mm ) and high-quality enameled wire of high strength and winds the craft of making specially. Primary Ra 2000 ohms. The LL1620CFB_8 and LL1620CFB_25 are special version of the LL1620 where the primary windings have been split to allow for (8% and 25%) cathode feedback. The 6L6GC to my ears is the ultimate well-rounded audio output tube. 7I have another Partridge WWFB 0. IWISTAO Tube Amplifier Transformer Kit for 6P3P EL34 Tube Amp Including 1pc 160W Power & 2pcs Output Transformers HIFI Audio Model No:WHFT-S160W It is a 160W tube amplifier transformer kit for 6P3P , EL34 or similar. EL34 output transformer replacement. T-190F Mains Transformer Quad C-Core Output Transformers* IE-Core Output Transformers Takman Carbon Resistors Mundorf's Best Myltic Power Supply Caps Mundorf Silver Gold Oil Film Caps Audio Note Copper Film Caps* PTFE Copper Hookup Wire Elna Cerafine & Panasonic FC Signal Electrolytics Shuguang* EL34 Tubes Audio Note Speaker Posts & RCA's. Output 3 8 and 16 ohms. Push-Pull valve output transformer 2xEL34. 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. OUTPUT TRANSFORMERS The new line of DYNACO output transformers incorpor­ ates the first basic advance in output transformer design since the introduction of interleaved windings. It has a low primary impedance and a high primary 2 6CA7/EL34 350 V 115 mA 8 W 3 6CA7/EL34 400 V 150 mA 14. The Tango NP-126 has 2 primary windings and can be used as Single-ended (SE) to SE, or PP to SE, or SE to PP. For this end, Mr. 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. I've got one right now I'm about to throw into a former Valve Special. The most critical component in valve amplifiers is of course the transformers and who better to specify and build them than Toroidy who have been manufacture high quality transformers. Transformer manufacturers generally state that an output transformer will show 'x' primary impedance with 'y' secondary load. The one thing im stuck on is the output transformer, according to the datasheet I need to get a 3500-4000 ohm transformer with a 4 ohm output to power a car speaker I have. The output transformer has two separate winds of wire, basically an input side and an output side. many 300B SE does't. Vintage Tube Output Transformer Filter Applied. Power: 160W; Core 96x50, 32 (tongue width). Hi-End tube amplifier in charming appearance Made with point to point wiring, Not PCB. With the plate voltage and milliamp values go to my Tube Bias Calculator. The output tubes each see 1/2 the plate-to-plate primary impedance when both tubes are conducting (since the full primary winding is active), but when one tube goes into cutoff (class B part of the cycle), the conducting tube sees 1/4 of the p-p impedance, because current is only flowing in half the primary, which is 1/2 the turns, and. Primary Plate Load impedance: 1. Nuts are not needed as the chassis holes are tapped. 5K (2A3-01/2A3-03) or 2. Tube Amplifier - 5Z3P, 6N9P, EL34 DIY kit assembly Part 3 2014-8-9. EL34, 6550, KT88 dual mono blocks: 280W: 1650W: 711 plate + 167S6: 6x 6550, KT88 dual mono blocks. 15W Tube Amplifier Output Transformer Single-ended Z11 Annealed Silicon Steel Sheets EI Transformers 0-4-8ohm for Tubes 6P14 EL34 EL84 6P3P KT88 6P1 Audio HIFI DIY. If you put 1v AC on the secondary and measure say, 31. Customers have been delighted with the sound of this transformer and amazed at how authentic it is to the original one. After incorporating these models into my LTspice netlist, I was able to simulate the. 2A3, 6A3, 6B4G, 300B : 6CA7, 6L6, 807, 5881, 6550, Parallel - 6AQ5, 6V6, EL84. All we need to do is determine the turns ratio of the transformer, and with that information we can calculate what impedance will be reflected back to the primary with a given load on the secondary. It is also great for general replacement, new OEM amplifier builds and D. Output transformer with a new imported 0. It features 4/8/16 Ohm taps with a buried 100V tap. winding of the output transformer and a 5V drop in the h. (For Class AB and a solid state rectifier there is little sag at idle. OEP R120A15F - 10W Single Ended Audio /Output Transformer for EL34 Valve / Tube Amplifiers Oxford Electrical Products ( OEP) - design and manufacture in Oxford, England. The EL34 35W stereo amplifier from ANK Audiokits provides some of the finest EL34 amplication available today. Another possibility for new builds (not a drop-in replacement) is a generic. Not only does it have larger power transformer, but it also features larger output transformers and is biased to handle 6L6's, EL34's and 6V6's without. 27th March 2009 Traded the 120W output transformer for 2x 30W ultra liniar output transformers. A range of Push-Pull Output Transformers for Valve Power Amplifiers. The unit is based on 4x EL84 output tubes, and one ECC83 driver tube. Ending Mar 1 at 7:23PM PST. Basically I'm hoping to squeeze maybe 15 watts of this thing with a 6550. Make Offer - REX EL84 Tube Amplifier Output Transformer for stereo | Tamura Tango 8k Primary Pair Altec Peerless S-510-F 10k/8k tube amp output transformers 45 46 EL84 6V6 $890. It uses 2 tube 6C33C, 2 tube EL34 Driver and 1 tube 12AT7 pre. 6v on the primary you have a Voltage Ratio (VR) of 31. Despite the fact that my love stays with DHTs, I've designed and built this amp to fill a gap that I thought it was worth the effort: making an amp in one enclosure, small enough but able to put out more power than a 45 or a 4P1L could do. The 6L6GC to my ears is the ultimate well-rounded audio output tube. Ra-a 4 kom. T-190F Mains Transformer Quad C-Core Output Transformers* IE-Core Output Transformers Takman Carbon Resistors Mundorf's Best Myltic Power Supply Caps Mundorf Silver Gold Oil Film Caps Audio Note Copper Film Caps* PTFE Copper Hookup Wire Elna Cerafine & Panasonic FC Signal Electrolytics Shuguang* EL34 Tubes Audio Note Speaker Posts & RCA's. Between 2008 and now, 2017, I sold most of the popular OPTs for PP KT8 but I still have 90% of the many. Primary Plate Load impedance: 1. They will provide increased headroom and clarity when used with single 6V6 and EL34 stages. The transformers that have been used in these proof-of-concept products were 4x the toroidal speaker output toroidal transformer, of the “EXPO” series, and a “SUPREME” series unit as the toroidal power transformer, with a power handling cabability of 250VA. The 125GSE is a SE output transformer. 9 amps which is way more the double. However, this configuration is rarely found. You can see the holes for the bias adjustments near each EL34 socket, and the bias test points between the output transformers. Output transformers - quality here makes a very big difference in smoothness and extended response. Basically I'm hoping to squeeze maybe 15 watts of this thing with a 6550. A KT88 is rated at 35 Watts. The output transformer must have a UL mode tap if you intend to use UL. I also have a complete output chassis with tubes from a Dual TG12A stereo tape recorder, EL95 (6DL5) output tubes rated at 2. A range of Push-Pull Output Transformers for Valve Power Amplifiers. 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. Ending Tuesday at 12:57PM PST. SUNN 200- O Power Transformer $355. Profit margin or it is hard to design a good KT66 amp these days since there werern't many clone circuits and good transformer available? As far as EL34 vs KT66 tube goes for the modern home audio equipment, the modern EL34 has much higher demand and longer history than the modern KT66 due to hard to find NOS. A great paper layer wound output transformer with 8K Ohm primary for use with KT66 tubes. This output is wound in the same winding geometry and tradition Partidge made famous. You can consider an OPT with a 43% screen grid tap to allow ultra-linear mode. The New Super Deluxe features a slightly refined EQ and a larger output transformer to process the larger EL34 Power Tubes. so each EL34 will have a load of only 2300 * 4 = 9200ohm. Power transformer, power supply choke, and a separate filament transformer for the regulated DC pre-amp filament supply. Power Transformer Voltage: Rectifier Type: Power Tube Type: *6L6 tubes have different ratings. Multi section winding for exceptional bandwidth and phase shift. VHR is a good retail outlet for these. Audio Output Transformer. Designed for push-pull tube output circuits, these transformers include 40% screen grid taps for Ultra-Linear operation. If we assume 5-percent sag and less than 5VDC loss across the output transformer primary, then we get about 460V at the EL34 plates. Atarashi used his Studer A730 CD player for the testing input source. For this end, Mr. Triad HSM-190 Output Transformer. 0 (1 votes) Store: Zhifeng D electron Store US $116. It features 4/8/16 Ohm taps with a buried 100V tap. Mains transformers Output transformers Output Transf. With just a couple of modifications the design will work with either the 6DQ6 or the EL34. 2A3, 6A3, 6B4G, 300B : 6CA7, 6L6, 807, 5881, 6550, Parallel - 6AQ5, 6V6, EL84. 6L6 push-pull output transformer, power: 40W/40Hz, primary impedance: 6. It features 4/8/16 Ohm taps with a buried 100V tap. 06MM, withstand voltage 2000V). Universal Push-Pull types can be used in Triode, 20% Ultra Linear and 43% Ultra Linear. The transformer should be rated to handle the power produced by this amplifier. Our output transformers are all hand-wound righ. Ending Mar 1 at 7:23PM PST. Single-ended output transformer for a single 6550/KT88 power tube and an 8 ohm speaker load. And even worst, I unable to find 2. Setting your bias using the shunt method for a specific plate dissipation. 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. For the "ultimate" in Push-Pull output see our line of epoxy potted output transformers. FEATURES Our power output transformers use the best grade (M6) low-loss grain oriented silicon iron laminations. The Tango NP-126 has 2 primary windings and can be used as Single-ended (SE) to SE, or PP to SE, or SE to PP. A great paper layer wound output transformer with 8K Ohm primary for use with KT66 tubes. 5 Inch) EI120 Review & more. I'm looking at JJ Electronics EL34, JJ 6L6GC or JJ 6CA7, mostly because of cost. Thus these C-cored output transformers have extraordinarily low leakage inductance and far below what is regarded If you design any output transformer, you should be able to copy the tables below and fill in the right hand. Secondary terminations: 4, 8, 16 Ohms. Power transformer X 1. 44 Output transformer Marshall JCM600, JCM900, JCM2000 Guitar Amp Tube Amplifier. Power Supply - this is really covered in #1, but it's fair to mention it. KT66 output tubes. MADE IN USA. This could be as low as 5 watts in triode mode, or as high as 20 watts in pentode mode. 40W push-pull output cow 6P3P/6L6/EL34 output transformer 5K: 0-4-8 Euro OP764506. THD Replacement Output Transformer for UniValve Amplifiers, Brand New, Direct From The Factory, 14-Day Money-Back GuaranteeThis is a replacement output transformer for THD Electronics' UniValve amplifiers. This output is wound in the same winding geometry and tradition Partidge made famous. 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. Figure 1: Single-Ended (SE) 6L6 / 5881 Vacuum Tube Amplifier Schematic. It uses 2 tube 6C33C, 2 tube EL34 Driver and 1 tube 12AT7 pre. Checking An Unknown Output Transformer We can now use this knowledge to determine the impedance of any unknown output transformer. Mullard EL34 Push-Pull Tube Amp Schematic with Dynaco A420 Transformers. I'm looking at JJ Electronics EL34, JJ 6L6GC or JJ 6CA7, mostly because of cost. Call or Email to check feasability. FEATURES Our power output transformers use the best grade (M6) low-loss grain oriented silicon iron laminations. The same time, ENIGMAcoustcis Labs starts to design output transformer by his own and the result is so satisfactory comparing to Sowter transformer. To make a good output transformer, 6-8 winding machines are required for multi-layer winding process. Primary Ra 2000 ohms. Ending Mar 1 at 7:23PM PST. ISSUE 2 EL34 OUTPUT PENTODE Output pentoderated for 25W anode dissipation, EL34 OUTPUT PENTODE EL34 1056-16. For the "ultimate" in Push-Pull output see our line of epoxy potted output transformers. Accessories price:$35. It comes in 4 versions as either integrated or power versions. Nuts are not needed as the chassis holes are tapped. Does not fit the JCM900's but could be adapted as an upgrade. The EL34 produces low-frequency extension that easily walks away from the 300B. In common with all 'E' prefix tubes, using the Mullard–Philips tube designation, the EL34 has a heater voltage of 6. The EL34 is a thermionic valve or vacuum tube of the power pentode type. 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. 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. 4 ohm is optional (free of charge). You can set the conditions for storage and. A range of Push-Pull Output Transformers for Valve Power Amplifiers. The SNAPPER's 100 Watts at full power across the entire frequency band from a quartet of EL34's in a fully differential circuit topology is only achievable with an impressive 19-layer output transformer designed and wound by us here at Manley Labs, of course. The EL34 35W stereo amplifier from ANK Audiokits provides some of the finest EL34 amplication available today. Fair offers considered. 1 Khz) minimum. Choke 10H 250mA B-060. The general rule of thumb for a one-tube single ended output stage is to use a transformer with a primary impedance. Amplifier schematic and circuit description. Output transformer Marshall JTM45 (push pull 2 x KT66, EL34) Guit Transformers £68. EL34 has a reflected load of 2KOhm, so I need to find coresponding transformers. Power Transfomer Output Transformer Specifications A. It will now be the standard OT for the 10W Chihuahua. RW-40-5 Single-Ended 3K / 5K ohms 40W type Audio Output Transformer. It is recommended that the output transformer is rated in the 20 to 50 watt range if the budget allows. While not as accurate as the output transformer shunt method (detailed below, after the cathode resistor procedure) it is far and away the safest of the two methods, and can be successfully done with medium- and even low-quality test equipment. Ending Wednesday at 1:40AM PST. Figure 16 depicts the basic schema of Single Ended vacuum tube amplifier built around a tetrode (or a pentode, here the suppressor terminal is not shown) in ultra-linear configuration (see Section 2. EL34 PP-400 Ohms: EI. EL34 PP-400 Ohms: EI. Typical applications - Push-Pull: triode, Ultra-Linear pentode, pentode and tetrode connected audio output. Most of our OPTs can be configured for different primary and secondary impedances. Audion Sterling Anniversary integrated stereo is hard wired point to point using better graded components and & larger Audion wound output transformers (EI96) & hand built. 35EI) annealed silicon steel dedicated audio sheets, high quality oxygen-free coppe. Genuine Marshall Transformers, Marshall Power Transformer, Marshall Output Transformer, NOS, Marshall MG100RCD, MG80RCD Power Transformer, PT9661 Submitted by gpadmin1 on Thu, 05/17/2012 - 00:53. Description: This is a great output transformer for JTM45** style amps. output transformer for VOX AC120, 4x EL34, 4 Ohm. Of course this cost a lot of money, Hammond HIFi (not guitar) output transformer for 20w cost something like 99$ each. The HV winding is. But the impedance is Z = 2π · f · L e where f is the frequency in Hz L e is the leakage induction in Hy at e. Output transformer Marshall JTM45 (push pull 2 x KT66, EL34) Guit Transformers £68. Output transformers. R-Core Power Transformer - high voltage. T-190F Mains Transformer Quad C-Core Output Transformers* IE-Core Output Transformers Takman Carbon Resistors Mundorf's Best Myltic Power Supply Caps Mundorf Silver Gold Oil Film Caps Audio Note Copper Film Caps* PTFE Copper Hookup Wire Elna Cerafine & Panasonic FC Signal Electrolytics Shuguang* EL34 Tubes Audio Note Speaker Posts & RCA's. Power = Voltage 2 /Impedance, so Voltage = √(Power * Impedance) = √(12w*5kΩ) = ~245vdc 25w / 245v = 102mA idle plate current (!). Customized 40w Push-Pull Tube Amp's Output Transformers 2 PCS For 6P1 EL84 6L6 EL34 KT88 KT66 HIFI EXQUIS. Depending on your transformers you may not have the heater current to heat EL34 tubes. This protects primarily the output transformer from overcurrent, usually the result of an output tube short. 15W Tube Amplifier Output Transformer Single-ended Z11 Annealed Silicon Steel Sheets EI Transformers 0-4-8ohm for Tubes 6P14 EL34 EL84 6P3P KT88 6P1 Audio HIFI DIY. ISSUE 2 EL34 OUTPUT PENTODE Output pentoderated for 25W anode dissipation, EL34 OUTPUT PENTODE EL34 1056-16. 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. 46mm Four secondary windings of 100 Ohms allow to wire the transformer for 16-32 Ohms operation. Supports 8/16 ohm output taps. What kind of valves can be use:71A,45,2A3,VT-25,6AC5,6F6,6V6,6BM8,6BQ5(EL84),7189. Potting type output transformer, to ensure the stability and reliability of the output transformer, especially in the southern humid places, have a more reliable performance. If you’re still in two minds about el34 output transformer and are thinking about choosing a similar product, AliExpress is a great place to compare prices and sellers. EL34 output transformer replacement. Tube Amplifier Output Transformers LL1620 , LL1623, LL1627, LL9202 The LL1620, LL1623, LL1627 and LL9202 are output transformers for tube amplifiers. 62; Buy It Now +C $211. Now I need to pick out tubes. Not that I haven't enjoyed listening to some EL34-based amps, but I always go back to the 6L6. Also, these feature 5K and 8K Ohm primary impedances and 4/8/16 Ohm secondary impedances. Profit margin or it is hard to design a good KT66 amp these days since there werern't many clone circuits and good transformer available? As far as EL34 vs KT66 tube goes for the modern home audio equipment, the modern EL34 has much higher demand and longer history than the modern KT66 due to hard to find NOS. 5K CT: 600W CT: 20Hz-47KHz-1dB: 2A3 / 300B: JS-3003N. Pair of Triad #45448 Williamson Hi-Fi Output Transformers 6BQ5 / EL84, VGC. Pads 2 and 23 should be connected to EL34 sockets that have solid (blue & green) wires connected to them (from the output transformer) See schematic for details. With limited numbers of valve Types being made the octal based valve adds to the aesthetic of the amplifier. Other amp manufacturers would love to use it. The input side is called the primary (usually several thousand ohms), and the output side is the secondary to match the speaker impedances that are commonly used. Many different Output Transformers transformers for sale. (601 Magnetic Drive #8, Toronto, Ontario, Canada M3J3J2, 416-667-9914) has improved this situation in a new line of toroidal output transformers that have an unusually complete set of specifications. The quality of the audio output transformer (OPT) will have the largest effect on the sound quality. 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. … Service/Help. the schematic is from the Dynaco Super Fidelity Output Transformers catalog. Four El34, 6L6 or 6550 power tubes. #N#※Combining driver tube, recommended in the range of value of the plate internal resistance rp is are described in the field of Zp. Shuguang 6N9P (6H9C 6SL7) Accessories price:$12. With a gold -plated molybdenum alloy grid and carbon -coated screen grid, the Svetlana EL34 is the finest power tube of its type being manufactured today. RMS Power 12 Watts. Here we have a very sought after Partridge output transformer. The amplifier circuit shown uses the Dynaco A420 audio output transformers which have a primary impedance of 6600 ohms. Power = Voltage 2 /Impedance, so Voltage = √(Power * Impedance) = √(12w*5kΩ) = ~245vdc 25w / 245v = 102mA idle plate current (!). 80 shipping. Checking An Unknown Output Transformer We can now use this knowledge to determine the impedance of any unknown output transformer. 5 WattsIf you look at the schematic you will see the separate chasis connected via a 9 pin harness to the main chassis of the recorder. Also a perfect replacement for the 125A13A (022871) used in the Fender Bassman 50, 6G6A, 6G6B, 50W. Output transformer, PushPull, EL34, tube, PP. Call or Email to check feasability. 3-1/8" mounting centers. For the "ultimate" in Push-Pull output see our line of epoxy potted output transformers. Tube Amplifier - 5Z3P, 6N9P, EL34 DIY kit assembly Part 3 2014-8-9. Excellent choice for a 6L6 or EL34 single-ended amp using either a 4 or an 8 ohm speaker load. 008 = 1570Ω. All our transformers and output transformers have been handcrafted in the traditional way of decades ago, which gives them a high level of accuracy and greatly increases the life expectancy of the transformers,unlike transformers, which are mass-processed with automatic winding machines, have a life and accuracy low The output transformer adopts and. 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. And even worst, I unable to find 2. It is also great for general replacement, new OEM amplifier builds and D. The EL34 produces low-frequency extension that easily walks away from the 300B. EL34 ELR = 6,500 ohms The Turns Ratio (TR) can be found by applying a small AC voltage to the secondary and measuring the result on the primary. By maintaining a close control over manufacture, OEP ensure that each transformer is manufactured to the very strict specification that their designer intended. The quality of the audio output transformer (OPT) will have the largest effect on the sound quality. Output Transformer. Made in USA. New output transformer was designed for higher sound quality. Accessories price:$69. Power Transformer Voltage: Rectifier Type: Power Tube Type: *6L6 tubes have different ratings. Transformers and output Transformers. 3-1/8" mounting centers. The EL34 35W stereo amplifier from ANK Audiokits provides some of the finest EL34 amplication available today. The new transformer results not only in a louder amp but also changes tone and feel somewhat, making it more dirty and aggressive. Sowter happens to have a single-ended output transformer for the EL34. 40W push-pull output cow 6P3P/6L6/EL34 output transformer 5K: 0-4-8 Euro OP764506. The 345-0-345 volt RMS power transformer creates 488VDC if there is no load or rectifier loss. RMS Power 12 Watts. You can see the holes for the bias adjustments near each EL34 socket, and the bias test points between the output transformers. Only PrimaLuna, through our proprietary output transformer designs, can give you EL34 midrange beauty with top-end air that goes on forever. The output section is shown in the schematic below. 35 core manufacturing, high-purity copper wire package enameled, layered segmentation, string and connection. It is the same physical size as my TO22 transformer. 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. 300B SE Output Transformers: Sophia Electric vs. Output Transformer Questions Discussion in 'Shock it uses an EL34 but you can change the values to suit an EL84 and it's own load chart. Despite the fact that my love stays with DHTs, I've designed and built this amp to fill a gap that I thought it was worth the effort: making an amp in one enclosure, small enough but able to put out more power than a 45 or a 4P1L could do. It is used to couple the vacuum tube and Continue Reading →. The chassis is black powder coated aluminum as is the transformer cover. Transformers are designed to match the valve data in our valve data page. pl) Silver Luna valve amplifier sporting EL34 output valves and designed and manufactured in Poland. Transformers and output Transformers. 2A3, 6A3, 6B4G, 300B : 6CA7, 6L6, 807, 5881, 6550, Parallel - 6AQ5, 6V6, EL84. The 125GSE is a SE output transformer. View online Handbook for Marshall Amplification EL34 100/100 Amplifier or simply click Download button to examine the Marshall Amplification EL34 100/100 guidelines offline on your desktop or laptop computer. IWISTAO Tube Amplifier Transformer Kit for 6P3P EL34 Tube Amp Including 1pc 160W Power & 2pcs Output Transformers HIFI Audio Model No:WHFT-S160W It is a 160W tube amplifier transformer kit for 6P3P , EL34 or similar. TRANSFORMER. ISO transformers made by the employees who made the TANGO transformers. Ending Mar 1 at 7:23PM PST. In addition, the robust power transformer can support tubes with higher heater current requirements such as the KT88 series including KT120 and KT150. (For Class AB and a solid state rectifier there is little sag at idle. Output 3 8 and 16 ohms. OEP R120A15F - 10W Single Ended Audio /Output Transformer for EL34 Valve / Tube Amplifiers Oxford Electrical Products ( OEP) - design and manufacture in Oxford, England. It is used to couple the vacuum tube and Continue Reading →. The output transformer is the heart of a valve amplifier. Mullard EL34 Push-Pull Tube Amp Schematic with Dynaco A420 Transformers. If the values of C103 and R107 and R108 are wrong (too low of capacitance to bypass bass frequencies; too high of resistances will have less current in the EL34 and too high of a plate resistance to drive the output transformer inductance). VTS13131-1100 Data Sheet:. Primary Ra 2000 ohms. Below is a list of various Push-Pull Transformers for Tube Amps along with specifications required for a decision when building your amp project however for more information such as dimensional data please search the product on the site. Imax = 140 mA per valve. Despite the fact that my love stays with DHTs, I've designed and built this amp to fill a gap that I thought it was worth the effort: making an amp in one enclosure, small enough but able to put out more power than a 45 or a 4P1L could do. 3-1/8" mounting centers. In reality, the power is less than doubled although it exceeds the 115-120 watts produced by later EL34 amps. The anodes are connected to the primary winding, the cathodes to ground (circuits 1, 2, and 3), and the middle of the primary to the high-voltage supply. (See disclaimer below) 1) With the amplifier unplugged. The LL1627/185mA have a primary inductance of 9H and the EL34 have a nominal plate resistance about 910ohm and four 910 / 4 = 227. Universal Push-Pull types can be used in Triode, 20% Ultra Linear and 43% Ultra Linear. The product is enclosed in the square case on the left. 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. Shuguang 6SN7GT (6SN7) Match Pair. Latest Update to this page :- August 2107. Please, select the correct type: Optional Rload in Ohms (typically the output transformer primary impedance) Only considered when PP (Push-Pull is selected) Number of tubes Power Tubes Pre Amp Tubes:. 25 Watts 7K ohms CT. Power transformer X 1. Ending Tuesday at 12:57PM PST. Pricelist for customers inside the European Union. 1k75 p-p) to a quad of EL34/6CA7's for around 100 watts. With the plate voltage and milliamp values go to my Tube Bias Calculator. This amplifier uses LL1663/PP transformers. The product is enclosed in the square case on the left. Despite the fact that my love stays with DHTs, I've designed and built this amp to fill a gap that I thought it was worth the effort: making an amp in one enclosure, small enough but able to put out more power than a 45 or a 4P1L could do. All units include 40% screen taps for Ultra-Linear operation (if desired). V78A01F push pull transformers are suitable for use with amplifiers with EL34 valves. 4 x EL84, 6V6. For this end, Mr. If the values of C103 and R107 and R108 are wrong (too low of capacitance to bypass bass frequencies; too high of resistances will have less current in the EL34 and too high of a plate resistance to drive the output transformer inductance). The output transformer adopts and imports the silicon steel sheet of audio frequency (0. It is used to couple the vacuum tube and Continue Reading →. Pair of Triad #45448 Williamson Hi-Fi Output Transformers 6BQ5 / EL84, VGC. at full rated power (± 1 db max. Great for 8kct to 8 ohm for hi fie, or 4kct to 4 ohm for guitar amps. A range of Push-Pull Output Transformers for Valve Power Amplifiers. The 5F6A is a Class AB Fixed Bias amp so 70% of max dissipation is your safe limit. RMS Power 12 Watts. Additionally, I obtained a model for the guitar speaker that I already owned, Celestion's Vintage 30. The same time, ENIGMAcoustcis Labs starts to design output transformer by his own and the result is so satisfactory comparing to Sowter transformer. Click to learn more. windings on a fixed ohm 4/8/or 16 secondary wouldn't possibly be standard? a single ended, class-a only has one path. The output transformer must have a UL mode tap if you intend to use UL. I've got one right now I'm about to throw into a former Valve Special. Enclosed in a drawn steel case, the transformer is completely potted in epoxy. A great paper layer wound output transformer with 8K Ohm primary for use with KT66 tubes. This ensures minimal distortion and low insertion loss. About 43% of these are transformers, 5% are other electronic components, and 1% are inductors. Transformers are designed to match the valve data in our valve data page. The input side is called the primary (usually several thousand ohms), and the output side is the secondary to match the speaker impedances that are commonly used. Output 3 8 and 16 ohms. The load of the vacuum tube is an output transformer. Enter then the Fezz Audio (A newly formed division of Toroidy. All we need to do is determine the turns ratio of the transformer, and with that information we can calculate what impedance will be reflected back to the primary with a given load on the secondary. Grand Stack version with more iron, thus more power, more bass and finally more tone! 60Hz - 25KHz +-1. 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. Black matte finish. Unfollow output transformer el84 to stop getting updates on your eBay Feed. They can flavor the sound in subtle ways, but nothing like the magnitude of change in #1. BUILD ON 17 TESLA [ 17. 46mm Four secondary windings of 100 Ohms allow to wire the transformer for 16-32 Ohms operation. Depending on your transformers you may not have the heater current to heat EL34 tubes. 6CA7/EL34, 6L6, KT66, etc. I'm looking at JJ Electronics EL34, JJ 6L6GC or JJ 6CA7, mostly because of cost. It comes in 4 versions as either integrated or power versions. 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. Mercury offers Transformer Restoration Services for rare and vintage transformers that are failing or underperforming. The amplifier circuit shown uses the Dynaco A420 audio output transformers which have a primary impedance of 6600 ohms. VHR is a good retail outlet for these. EL84's draw. The output transformer must have a UL mode tap if you intend to use UL. 30 shipping; From Taiwan; Audio output transformer for Single-ended Tube amp! EL84 / 6L6 / 6V6 / EL34! NOS. 3,000 ohm primary is rated. The drive circuitry of the control grids is not shown - I assume perfect. Supports various output tubes. I'm looking at JJ Electronics EL34, JJ 6L6GC or JJ 6CA7, mostly because of cost. Power Supply - this is really covered in #1, but it's fair to mention it. VHR is a good retail outlet for these. Raphaelite 5K 50W Vertical Output Transformer for EL34,6L6,KT88 Tube Amplifier. 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. Power: 160W; Core 96x50, 32 (tongue width). Choke coil capacitor input rectifier (C-INPUT) Allowable current. 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. And a low cost step down transformer as an output transformer. 4K available from the Edcor web site. Another possibility for new builds (not a drop-in replacement) is a generic. It has a low primary impedance and a high primary 2 6CA7/EL34 350 V 115 mA 8 W 3 6CA7/EL34 400 V 150 mA 14. The output transformer adopts and imports the silicon steel sheet of audio frequency (0. In addition, the robust power transformer can support tubes with higher heater current requirements such as the KT88 series including KT120 and KT150. Output valves in Cathode biased amps operate at maximum allowable temperature (quiescent Anode dissipation) An EL34 (6CA7) is rated at 25 Watts. 0 (1 votes) Store: Zhifeng D electron Store US $116. RW-40-5 is R core audio output transformer for single ended type amplifier. 5% UL taps on the primary output these push-pull transformers have outputs for 4 Ω, 8 Ω and 16 Ω. This amplifier uses an enhanced Power Supply with high quality IE-Core or C-Core Output Transformers for 40W per channel. ) will change optimum plate to plate load impedance. 000 GAUSS ] CORE. 6SN7,76 12AU7,6350. This transformer can also be used to replace blown outputs on many low & mid-priced tube hi-fis, stereos, and console radios, as well as some jukeboxes from the 40's, 50's & 60's. OUTPUT TRANSFORMERS The new line of DYNACO output transformers incorpor­ ates the first basic advance in output transformer design since the introduction of interleaved windings. Enclosed (shielded), 4 slot, above chassis Type 'X' mounting. 94; Buy It Now +C $28. ) will change optimum plate to plate load impedance. Buy It Now +C $63. VINTAGE JENSEN 123-S OUTPUT TRANSFORMERS- PAIR - CANNON XLRS - MALE /FEMALE. Output Transformer Questions Discussion in 'Shock it uses an EL34 but you can change the values to suit an EL84 and it's own load chart. frequency response 8-70 khz -3db. Depending on your transformers you may not have the heater current to heat EL34 tubes. at full rated power (± 1 db max. EL84's draw. Most of our OPTs can be configured for different primary and secondary impedances. The effective load resistance of the two tube types is different which means that you would need to change your output transformer as well. 5 WattsIf you look at the schematic you will see the separate chasis connected via a 9 pin harness to the main chassis of the recorder. Output Transformer. All units include 40% screen taps for Ultra-Linear operation (if desired). FEATURES Our power output transformers use the best grade (M6) low-loss grain oriented silicon iron laminations. We wind our push-pull output transformers on two chamber bobbins which ensures full capacity and resistance balance. Fair offers considered. And of course, there comes the issue of output; one can obviously build a high-powered amplifier running EL34 far more easily than the 300B. For a verbal description click here. Alternative Ra or HT figures can be supplied. If you put 1v AC on the secondary and measure say, 31. OUTPUT PENTODE. EL34 ELR = 6,500 ohms The Turns Ratio (TR) can be found by applying a small AC voltage to the secondary and measuring the result on the primary. Vintage Tube Output Transformer Filter Applied. The output transformer must be able to handle the output power without major losses and distortions, over the intended frequency range. Below is a list of various Push-Pull Transformers for Tube Amps along with specifications required for a decision when building your amp project however for more information such as dimensional data please search the product on the site. 1650G 35watt Push-Pull Output Transformer 35 Watts - 6,600ct - 200mA Suggested tubes 6L6GC, 807, EL34, A bit about the 1608A-1650A Series A new and improved version of Hammonds 1608-1650 Series multiple secondary output transformers re-designed secondaries for easy hook-up of secondary loads). A range of Push-Pull Output Transformers for Valve Power Amplifiers. The transformer is stamped "FENDER" on both sides. The transformers that have been used in these proof-of-concept products were 4x the toroidal speaker output toroidal transformer, of the “EXPO” series, and a “SUPREME” series unit as the toroidal power transformer, with a power handling cabability of 250VA. And of course, there comes the issue of output; one can obviously build a high-powered amplifier running EL34 far more easily than the 300B. 25 Inch 3 Inch 5. 5K (2A3-01/2A3-03) or 2. 40W push-pull output cow 6P3P/6L6/EL34 output transformer 5K: 0-4-8 Euro OP764506. windings on a fixed ohm 4/8/or 16 secondary wouldn't possibly be standard? a single ended, class-a only has one path. 15W Tube Amplifier Output Transformer Single-ended Z11 Annealed Silicon Steel Sheets EI Transformers 0-4-8ohm for Tubes 6P14 EL34 EL84 6P3P KT88 6P1 Audio HIFI DIY Model No: WVTO-OT15W The output transformer adopt core of Japan Z11(0. Pair 10W 7K:0-4-8Ω Output Transformer OPT 6P6 EL34 Tube Amplifier Single End. Heyboer Output transformer for older style 100 watt Marshall's. so each EL34 will have a load of only 2300 * 4 = 9200ohm. While not as accurate as the output transformer shunt method (detailed below, after the cathode resistor procedure) it is far and away the safest of the two methods, and can be successfully done with medium- and even low-quality test equipment. Output 3 8 and 16 ohms. I'm also using, or rather, going to be using a 270FX power transformer and a P-TF22921 reverb transformer from AES. 6 which means that the turns ratio is 31. Shop with confidence. Heyboer Transformers in Michigan, USA, is now making Hiwatt-style OTs, using high-grade lams and winding patterns like the original. This ensures minimal distortion and low insertion loss. This type of transformer can be used with many tube types, such as pairs of 807, 6L6, KT66, EL34, push-pull parallel (quads) of 6V6's or EL84 and others. 5KOhm for a pair of EL34, but we are only considering one half of the output stage. No overall negative feedback is applied to the amplifier. for 2 x EL34 /6CA7 /6550 /6L6GC. By maintaining a close control over manufacture, OEP ensure that each transformer is manufactured to the very strict specification that their designer intended. Made in USA. appropriate for the approximate amp wattage. EL34 PP-400 Ohms: EI. Genuine Marshall Transformers, Marshall Power Transformer, Marshall Output Transformer, NOS, Marshall MG100RCD, MG80RCD Power Transformer, PT9661 Submitted by gpadmin1 on Thu, 05/17/2012 - 00:53. RMS Power 12 Watts. 35EI) annealed silicon steel dedicated audio sheets, high quality oxygen-free coppe. 74mA is the current flowing between Anode and Cathode, from a B+ supply of 380V. Transformers are designed to match the valve data in our valve data page. I then proceeded to install my new el34 groove tubes out of my jcm tsl100 watt head, and as soon as i turned it on. Additionally, I obtained a model for the guitar speaker that I already owned, Celestion's Vintage 30. Transformer manufacturers generally state that an output transformer will show 'x' primary impedance with 'y' secondary load. Despite the fact that my love stays with DHTs, I've designed and built this amp to fill a gap that I thought it was worth the effort: making an amp in one enclosure, small enough but able to put out more power than a 45 or a 4P1L could do. As output transformer has been choiced the Lundahl LL1627/185mA with secondaries connected in B configuration to have a primary load impedence of 2. 25 Inch 3 Inch 5. Alternative Ra or HT figures can be supplied. The HV winding is.