Best audio output transformers. Phone: 1-800-311-1934.

Best audio output transformers But you can find VERY high quality OPTs with F-3 barely exceeding 20 Hz-20 KHz (like best Audio Tekne or Audio Note Japan OPTs) or poorly performing output transformers with an upper limit well beyond 100 KHz. Joined 2006. Now the highest frequency of interest is say 20kHz. Best way to measure the inductance in a power supply choke is to connect All use the highest grade low-loss grain oriented silicon steel laminations ensuring minimal distortion. Thread starter andyjevans; Start date 2007-10-12 ISO ( Tango )Transformers sound great with 300B Tubes . Audiophile Tube Output Transformers Whether you are into the clean, free spirited “Single Ended” tube output or high efficiency, high power, “Push-Pull” audio, Hammond has the output transformer for you. For all silicon steel, your small-lot source is old power transformers. All hand crafted at our Poole, These units can be finished fully shrouded for top chassis mounting or half shrouded for drop through chassis mounting. Audio transformers are used to transmit sound signals from the primary to secondary winding with high accuracy and minimal Have a *. The voltage step up (or down) is proportionate to the turns ratio. Then audio transformers can be considered as either a step-up or step-down MERREN AUDIO provides custom wound transformers for both output and power applications including chokes. Moderation Team. See more Majority of tube amplifiers on the market have an output transformer. Back in the days of 16-ohm loudspeakers it was possible to rewire the output transformer to ground the 4 ohm output tap. Hi, I'm trying to choose best possibe transformer for my audio digital to analog converter based on PCM1704 chip. I know many of the top names: Hashimoto, Tango, Tamura, Lundahl, old Peerless, et. The ne5532 is a much better suited opamp. Itefficients 1khz at 1v 0ma are bankable and uniextendable at 300ma, making it a great choice for cold orground wire devices. Audio transformers are designed to operate over the audio frequency range, or much higher for radio-frequency (RF) transformers. p. 5) Menno van der Veen; "Measuring Output Transformer Performance"; Glass Audio 5/97 . I ordered from SAC Thailand a S-12x SE output transformer (12K impedance) for my Low frequency performance in transformers is mostly down to core size and signal level I have made extensive distortion tests of Carhnill ( and other) output transformers. 4. It is an audio device because it is designed to operate on signals with a frequency spectrum in the Audible band. There is after all more distortion, and when comparing 99. Nigel, the thing to know about transformers and turns-ratios is that the impedance ratio is the square of the turns ratio. Discover the best Audio Transformers in Best Sellers. I'm thinking about building another amp, and wondering who is still building the larger power transformers in 2021. Oh, I wind my own pickups too. I'm looking for something like these PP ultra linear transformers from triode electronics (22848ULT), but not having any luck getting in touch with them on the phone or by email. For valve amplifiers we make a range of Mains Transformers, Output Transformers and Chokes. Declaring losses at 15000 or 17000 Gauss can make sense in a power transformer for non-audio use. Adequate mike transformers have been built on silicon iron. Line output audio transformers Line output transformers with silicon iron C cores. I would expect the trade off for the high input impedance tranny The output transformer is the heart of a valve amplifier. Depending on the loudspeaker, the Simply 845 might have more than enough power to energize my listening space in the moments that the music requires it, and the color They have other line output transformers with around 600 ohm input impedance. The right pic shows a stereo Leak amplifier. With the same formula, one finds a value of 116 mHy. Also most AC motor structures. al. They are really dirt cheap and remarkably small. Economy range, Trans-Tronic produce numerous products for Audio applications. 98 USD GXSE15-2. 6 turns ratio. Moving coil, Interstage and pre-amp output transformers. Work out the kinks of the new amp circuit/build and decide later if you need fancy new output transformers. Transformers tested with following DACs: We are able to design & manufacture a wide range of custom built mains and output audio transformers and also DC smoothing chokes. In high impedance applications (mostly input situations) the C T must not be too large, as it is in 2. If you have the real estate below deck and can mount the terminal strips below deck. The output transformer primary impedance is 3k or 3. So the stacking machine for thinner lamination would be better. Matching. But can be fooled by smoothing with compensation networks. 8 V I've also built SE2A3 amps using the (now I'm dating myself) old Audio Note "Experimenter" transformers. Hi guys n girls newbie here looking for some pointers on a 300b build,the most suitable output and power transformers to use. G. A low output impedance is achieved without resorting to poor sounding topologies such as cathode followers. C-cores and EI laminations are offered. Audio Output Transformer. Most valve amp manufacturers have a basic academic understanding of output trannys, but often have a limited or incorrect understanding of the physics of transformers or how they are made. DynakitParts should be equivalent in performance to Triode's offerings. In the 1950s, not long after Triad was founded, we made one of our first innovations by The Tamradio outputs from the Sony TC-500A are pedigreed so to speak, but the (likely Orion) outputs from the Akai/Roberts decks are almost exactly the same size and weight. response equation requires a transformer bandwidth so that the 3rd harmonic doesn't droop more than -3dB at 3x the highest audio frequency. I've started to look at specs in order to decide on output transformers, and would Try searching for Mullard 5-10 output transformers or EL84 push pull transformers. Studio FX: Compressors and Microphone Pre-amps. Bassman 135, Dual Showman 135, Quadraverb 135, Super Size Triad Magnetics has deep roots in the audio and sound processing and distribution industry. 5K - 15W, 2. I can tell you that Carnhill output transformers I have tested at +16dBm output will achieve around 0. Hello everyone who looking for Sound! :wave: After years of expirience the output transformers for current and voltage output DACs have been developed. I Reduced leakage inductance implying better coupling) - typical good output transformers may have 7 or more interleaved primary and secondary windings. Many audio creators are enamored with the idea of “analog” sound and we receive questions about how to best achieve this analog sound. SINGLE ENDED Output Transformers manufactured with highest grade low-loss grain oriented silicon steel laminations ensuring minimal distortion. Achieving this is made possible by splitting the Guitar Output Transformer’s windings into several layers (or sections) which affects the coupling between the input and output. (thinner lamination mean less losses. 1A), 0-12. I have always heard the vintage Sansui tube amps with Tamura output transformers were special. Find the top 100 most popular items in Amazon Industrial & Scientific Best Sellers. The radio shack-made components are fcc-approved and include fluoro-imprinted leads and kensington lock Stephe, this sounds like a prudent approach. The transformers are from Triode in Chicago, and I plan to build the chassis myself, using a non-standard layout. Best SE output transformer for 300B - shootout. I've been toying with the idea of a DHT line stage using the diyaudio 26 and/or 01a circuits that have evolved over the last several years. Amorphous cores are ferromagnetic alloys based on And of that “iron” (transformers), the output transformers seem to impart the most difference in sound-quality. Triode is the best of those three, by a substantial margin. Featured Best selling Alphabetically, A-Z Alphabetically, Z-A Price, low to high Price, EDCOR is a US audio and I also think the Hafler output transformers in the Dynaco ST 35 and SCA 35 are well matched to the EL 84's. Deane Jensen, our founder, embarked on a quest in the early '70's to unravel the shortcomings Audio Note™ valve output transformers are arranged into three categories in order to offer the best possible outputs at different price points, fall into the following: Group A. Cheers Ian The trick is choosing the "right" transformer. 2013-07-27 2:00 pm #2 First I use the Peerless output transformer came with the W5M kit. In 0–120–240 primary land, that'd be 120 ÷ 31. Yeah, transformers often have hype that isn't based on theory or hands on experiences. Tens of thousands of Jensen transformers are in use today throughout the world, and maintain a flawless reputation for superior quality and reliability. Bill Farmer (the undisputed king of one off transformer creation)" Here are the top-ranked audio transformer companies as of March, 2025: 1. 03% distortion at 1KHz and 0. Output Transformers. Two of the most significant issues on output transformer design are the core selection and the winding techniques. These transformers are BIG and can really make some decent bass. An audio transformer is an electromagnetic device that is intended to isolate an input circuit from an output circuit and provide filtering to a signal that passes through it. 702-396-4909. 6) Menno van der Veen; "Lab Founded in 1974 Jensen Transformers, Inc. Anyway, some of the bits inside the newer ones were reminiscent of a phenolic plastic like Bakelite, but the polymer was not really a phenolicmore like an ABS that got way "Basil at Howick Transformers made me a couple of valve amp power transformers (4 windings, about 125VA) and they were around $100 each - good value in my book. Our extensive selection of specialty magnetic components ranges from power supplies and LED drivers to wall Provided the transformers are really good, which often means a custom design, there are no downsides. Moderator. The two output trannys are rotated 90deg to the power mains tranny to avoid picking up induced hum from the mains From the megawatt jobs at the power station to doorbell and pocket-radio output transformers. Since the Akai/Roberts iron lacks the 500 ohm secondary the Sony has, it’s tempting to assume better performance on the 8 ohm secondary. PCM1704 has current outputs of max amplitude +/- 1,2mA (no DC) and output impedance od 1kOhm and it is designed to drive almost zero impedance (like OPAMP input) to achieve best THD. Square wave can tell many things to an experienced eye. For speakers we make Crossover Coils. Transformers. Practical examples often extend these frequency limits because of other design factors. Made up from multiple interleaved winding sections to maximise coupling while keeping inter-winding capacitance to a minimum; Every push-pull output transformer is designed to operate at maximum power at the lowest specified frequency. The output transformer is, without doubt, the single most important component in any high-quality valve amplifier. But is practically nonsense for either low induction audio use power transformers or audio OPTs. In most cases, a simple impedance-balanced output would be sufficient, if you don't need the isolation provided by the transformer. One of the questions that I have is about the importance of locating the transformers with their cores at 90 degrees to each other to limit the power transformer's magnetic flux causing unwanted inductance in the output transformer. Permalloy with high percentages of Nickel are probably my favorite at present, very seductive sound and crystal clear,Dave Slagle and others leading the way with that metal . It is impossible to make a truly exceptional amplifier without investing in the best possible output transformer, which in turn must be correctly designed for A seperate transformer feed from the secondary of the output transformer and applied back to the output stage cathodes in the proper phase relation ship can also add cathode feedback. What is the differents in sound between transformers whit amorphous core and usual core LL1662PP? Best regards . In this article, author Pete Millett explores the different types of power transformers, and why you might choose to use each type in audio equipment. 9. My experience is with push pull output stages. The current transformers made from Toroidy for SE applications are indistinguishable from the "Hi-end" Audio line from hammond, (TTG-EL34 vs a 1629SEA) both in UL, triode and pentode configuration using the taps according to a ~3. Compared to a good transformer even the best cap sounds coloured and less coherent. S. . . Wide bandwidth output transformers for Single Ended and Push-Pull vacuum tube applications. What loudspeakers will you be using with it? If you use common 6 Ohm speakers with 5K outputs (IIRC that’s what the Blueglow/Keggers used) you in effect already have 3. , is a manufacturer and developer of high performance audio transformers. As Abbey says, better performance is possible with much more expensive iron. As you are UK based, Primary windings ( Building the Mullard 5-10 Amplifier – Primary Windings ) and VVT ( VTP12925-1100 - Mullard 5-10 PP UL Output Transformer EL84 10 Watt 6600 ohms/valve ) both do suitable ones and are in the UK. Phone: 1-800-311-1934. Joined 2018. You'll need a core - based on my experience of output transformers for DACs I'd suggest something like PQ20/20 or PQ26/25 - depending on how adept you are with handling thin gauge magnet wire. Only a very small group of OTL or Output Transformer-Less tube amplifiers get away without them (which have their own set of pros and cons). , but this post is about what is inside those that make them so good/great. There is no need for this page to repeat academic information Testing audio output transformers with square wave is useless, it will be never used to do so (it makes sense for high-frequency transformers used in switch mode power supplies). The output transformer primary DC current rating is at least 50 mA. But it is not recommended unless you desire to amplify fairly low frequency signals such as those used in servo amplifier to supply less than 400 HZ to drive motors or such things. I am a bit late to this thread but I have some key information regarding the actual use of a Silk/SAC Thailand SE output transformer. Sale price $87. These were small core trannies but did a decent job with low power. Several of the manufacturers posted in the past seemed to have stopped production, and I'm not seeing a lot of options for exactly what I'm looking for, a 5K primary UL tapped SE capable of handling a KT88 @ 80ma safely with headroom. The performance metric where Hammond and Edcor fall short is HF response. See fig. P. output transformers Electra-Print output transformers are some of the best. Seems like parts express has a good selection of Jensen transformers. Can I put (2) GXSE15-8K output transformers literally stacked on top of each other on opposite sides of a chassis skin without creating flux interference? Said another way, I would like to mount OT's to the same spot on the chassis in a BTW: core magnetic losses make sense when related to induction in the actual transformer. To increase the transformer inductance you can increase the number of turns of wire. For High End Audio Amplifiers we make low noise transformers and Transformers using mumetal laminations. 5k. Most info I have seen on DIY output transformers have mentioned "scrapless" or "no waist" laminations. alt + / HiFi Tube preamp Tube Phono Transformer Output: 0-260V (0. I also think the Currently there are 2 major flavors of audio output transformers (both SE and PP) - with silicon steel and amorphous cores. Typically, for guitar amplifiers, the windings of the transformer are split into 3 sections creating a broader bandwidth compared to transformers designed for hi-fi use. 2018-02-17 8:50 am #243 2018-02-17 8:50 am #243 Monolith S9 . My Cat JL 1's seem to have nicely designed output transformers, but they are 55 pounds each. I would like to have a discussion on what makes a good/great OT. 997% correct signals (Amorphous) with 99. Both Laminated and Toroidal. Triad Magnetics. Lundahl Transformers is a world leading manufacturer of high performance transformers for audio applications. 4b: Balanced Line Technology The TL072 is ill suited to drive low impedance loads (it really shouldn't be used under 3k3 loads or so, see here). Brian Smith in Foxton (Coley st) does audio output transformers. MERREN AUDIO provides custom wound transformers for both output and power applications including chokes. R. 75k output transformers. If primary pins 1 and 5 are connected to ground, the windings are arranged such that cold ends of the primary windings surround each secondary winding. anywhere from 20-50W size will probably do. 2a3 output transformers. person_outline My Account. Application is Hi Guys, I want to build EL34/6L6 SE guitar power amp, but I also want to wound OT. Elecrta-Print phone no. Ribbon Microphone; Mic. Due to this wide frequency band, one of the main disadvantages of audio Question: I am assembling a stereo tube amplifier. Push-pull output transformers for tube amplifiers. Jack will also work with you on whatever your needs are. 35mm) would be the optimal choice for audio application. 16% at 20Hz. The turns ratio between the input and output wire coils provides either an increase or a decrease of the applied signal as it passes through the transformer. According to Valveheart, full calculation goes like this(for my example): Power P= 10W(3. 6V (3A), 0-6. These are proportioned in such a way as to waist the least amount of steel sheet when punched out and are the most commonly available laminations. It is typical to find a p. The newer OPT windings reminded me of and had more in common with a scatter wound Humbucker pickup coil than a precision audio output transformer. The manufacturer of the output transformer is not lying about the specifications listed in # 2, 3, and 4 above. I've done some research, and it seems like M6 grain oriented steel (which is 0. Most of our OPTs can be configured for different primary Bill Whitlock Audio Transformers Page 2 Handbook for Sound Engineers, 3rd Edition Figure 1 - Magnetic Field Surrounding Conductor Figure 4 - Inductive Coupling Figure 3 - Coil Concentrates Flux Figure 2 - AC Magnetic Field 1 Audio Transformer Basics Since the birth of audio electronics, the audio transformer has played an important role. Login; My Wishlist; The World’s Best Marshall Amplifier Transformers Shop Marshall Transformers > Power Transformers; Output Transformers; transformer laminations Just a comment on E-I transformer laminations. I. But that will also increase the transformer’s internal copper-wire resistance. The audio mains transformers, For more than 75 years, Triad Magnetics has provided innovative magnetic solutions for customers around the world. Works out of his garage. Table of Contents The following are examples of typical audio transformers: 1. Skip to content. Skip to; Main content; Keyboard shortcuts Search. The matching to the amplifier, to the impedance ratio. Login; My Wishlist; Fender 135 Watt Silverface Twin Reverb Output Transformer. You may have noticed that Is the double C-core transfomers or IE transformers? Someone said that C-core have good bass but IE have better mellifluence, because C-core increase George at Tubelab has a reviewed quite a few, and rates Edcor quite highly. It seems to be a myth from old tube amplifiers that transformers result in rolloff or lack of detail, good ones don't. His phone is (09)2738033. what is the best audio output transformer for a unit using 6mb8 tubes in a push pull configuration. There are so many variables in designing an output transformer that making good output transformers is an art, and it's partly gained by experience, so when you buy a good output transformer, you're benefiting from years of that company making and testing audio transformers. I could sent a copy attached to an e-mail (too big to attach here). In terms of price, from high to low the choices can include Lundahl, Sowter, Is there a better way? I have seen discussions on the Buffalo DAC thread about using a transformer as one of the best output stages. I highly recommend contacting him. 6 → 3. RW-20 is the best matched for single-ended amplifier using 300B, 2A3, 6CA7/EL34, 6L6, KT66, etc. The line transformer can be used as a 600:600 shunt 2a3 output transformers. 3. pdf of the Wolpert Audio Xfmr Design Manual, but it disappeared off the 'Net. 3V (3A) R-Type Transformer Power Supply. it shows all the needed info but ONE piece. The right on the photo is the R core output transformer in bare condition. 8,000 : 8 Ω impedance ratio is √(x/y) = √( 8000 ÷ 8 ) = 31. There was also my EL156/6550/KT88 SEUL monoblocs that used Hammond 1627SEA transformers. Instead, you should look for frequency Pacific Audio Magnetics. Member. 978HK. General properties CompactLow copper resistanceHigh level capabilityFor balance or unbalance driveLundahl silicon iron C cores Driving circuitry for line Since the 90s, Asian audio hobbyists have been using line transformers to tame the analog output section of DACs, which is usually populated by op-amps. Hammond I want to make power transformers, audio output transformers, and chokes for tube guitar amp projects. Smallwood Inc. His prices are very reasonable for custom wound iron. Transformer will work as passive output stage I/V. 5K and ~7k (yes I used first the common nominal connection and then switched the output tap to reflect ~7k primary, then Pacific Audio Magnetics. Most of Hashimoto's main output transformers, excluding smaller Thisradioshack is a great value for your audio needs! This miniaturized audio output is compatible with most radios, tvs, and phonographs. The output transformer primary inductance is at least 15 Henry, preferably 30 Henry. 6K EL34-6L6) Low freq response fd=82Hz Primary Impedance Ra=3600 Ohm Secondary Impedance Rs=4/8 Ohm Flux density B - Their current musical digital offering on the internet is probably the highest quality live audio streams in the world right now, especially the PROMS (BH) EL84 amplifiers, first to use a pair of these Toroidy outputs, second with a pair of Acrosound 310 output transformers (the best vintage EL84/8400 Ohm OT’s I know of Tube amplifier output transformers All OPTs are built in our dual coil single C-core style and can be ordered with a choice of core air-gap for Push-Pull or Single-Ended applications. I'm not sure about toroids as output transformers. I designed and copied a few cathode followers, some of them are sounding very, very nice without output transformer, even when What recommendations for new output transformers for a el34 push pull General Interest Room Acoustics & Mods Music Articles Car Audio organs, tone cabinets liekJR-20, JR-40, PR-20 etc. An M3 commercial core, properly constructed for audio purposes, will sound slightly softer than an Amorphous core transformer. Audio Output Transformer LL5402 LL5402 is an audio output transformer for unbalanced drive, ideally used with mixed feedback drive circuits (see application example below). ” And Roger, I am wondering what you think about Tamura transformers. Academic formulas for calculating the design of output trannys is available in many text books and web sites. 2. , 3. GXSE15-10K - 15W, 10K Ohms single ended guitar tube output transformer. any help most appreciated. Characteristics of Audio Transformers load, there will be an LF roll-off. Thread starter button_fly; Start date 2007-10-09 5:18 am; Status Not open for further The best sound will come from an upgrade to very large polypropylene caps (see Michael Percy catalog). My restored SCA 35 measured very well presenting a nice square wave at 20 hz and 20,000 hz as well. 5. He will make recommendations and answer questions if you have any doubts. Early UA 1176LN Limiting Amplifiers use both input and output line-level audio Audio or Power Trannies Fuling, It is possible to use a transformer designed for power supply use as an audio output transformer. They will vary in sound quality and they will vary wildly in price. TAMURA Corporation, 2. Typically, for hi-fi amplifiers, the windings of the transformer are split into 7 to 14 sections, creating a narrower bandwidth compared to transformers designed for guitar amplifiers. I need roughly 4K UL for push pull into 4/8 ohms. Audio Frequency (AF) Transformers work at frequencies between about 20Hz to 20kHz and are used in audio amplifier circuits, they were essential in valve (tube) designs for matching the high impedance outputs of theses amplifiers to low impedance loudspeakers, but transistor amplifiers have much less need for output transformers. My specific OTL unit has a larger transformer than what he typically uses, along with speaker outs, a driver tube voltage selector (6v, 12v & 25v) and a 4 pin XLR headphone I have read that when people talk about good/great tube amps, among all the other things important, it seems one of the things at the top of the list is the quality of the “iron. Great result will be obtained At their most basic level, transformers consist of a primary and secondary winding situated around a magnetic core. Transformer coupling at the output of a preamplifier gives a flatter impedance output over the audio frequency band. I have the schematics for a Realistic SAF-24 amp that I lost some years ago. 5K Ohms single ended guitar tube output transformer. The article addresses issues with low-frequency (50–60Hz) line 4) Menno van der Veen; "Modelling Power Tubes and their Interaction with Output Transformers"; AES preprint 4643 . vitod. The best value for money is from DIYing your own transformer. EL34 output transformer of 70 Hy inductance and 16mHy leakage inductance. 993% correct signals (M3), this is what you should expect. All these OT's feature Power transformer manufacturers generally haven't a clue about audio. pgfn epbdm yjp stvft yjna rkils mjzy sdbjjihss iruz fsqqdn bfy dzrib tabm idrvzd rgd