Lundahl output transformer review. How are these outputs? Comparable to Sowter.

Lundahl output transformer review The transformer is built from two three-section coils, with primaries and secondaries separated by electrostatic shields, and a audio C-core of our own production. The roomy P1 chassis provides space to move the X1 toroids inboard for a cleaner installation, while retaining all the benefits of separate analogue and digital circuits. Dec 12, 2017 · Lundahl LL1931 Moving-Coil Transformer Review & TestI made my living setting up arms/carts for a few decades -have 50 years experience doing this odd task. Feb 11, 2022 · There's been a lot of interest lately in moving coil step up transformers, especially in the lower cost range, many people going the DIY route with modern transformers from Cinemag, Lundahl, Jensen, etc, or picking up nice vintage SUTs from Denon or Ortofon or many others. 5 dBu mit PAD-Schaltung) Line Output Transformer LL2745 LL2745 is a line output transformer for tube amplifiers. And judging by the frequency curve graph, there is quite a bit of difference in how it behaves in the upper and lower end of the frequency spectrum. Does anyone have any The Buzz Audio MA-2. All ic opamps are mounted on sockets so it is possible to experiment with your own choice of amplifiers if desired. In stock and available to order online from Orso Audio. The transformer primaries are wound with a special low capacitance winding technique to achieve best high frequency performance. The “active” mode engages an amplifier circuit after the transformer, requiring phantom power, to boost the output signal. The company employs around 25 people and operates from a single location in the small town of Norrtälje, just outside Stockholm, Sweden. Jan 29, 2023 · Signal Output transformers Last Update: 01/29/2023 23:21:43 Description An output transformer can have several functions, such as: DAC Output Break the ground loop (Solve hum problems Pre-amplifier Output Provide electrical safety (Headphone) Options available DAC Output This is a wonderful application for a transformer. Additionally, a high-quality Lundahl output transformer ensures exceptional sound quality. If your budget can stand the strain they’re supposed to be good, though I found the stock transformers performed admirably. The LL1527 is built-up from two coils, each with one primary and one secondary winding separated by an electrostatic shield LL1623: Lundahl Output TransformerThe LL1623 is available in 3 versions. Driving circuitry for line output transformers should have low output impedance. Shipment is to all countries worldwide. “Passion is inversely proportional to the amount of real information available. In order to reach the very best performance in terms of low distortion and low line output impedance, we recommend that our output transformers are used with mixed feedback drive circuitry for negative output impedance and best THD performance. Technical Bulletin about Lundahl LL16xx and LL27xx family Update: 06/26/2025 07:33:00 For: LL1660, 1660S, L L1671, LL1677, LL1689, LL1692A, LL1694, LL2731, LL2745, LL2754, LL2763, LL2766 Introduction Programming the EE27 Board Technical Bulletin about this transformer family (you are here) Using S-Parameters for simulation of frequency curve These are some various bits of information, which Nov 25, 2019 · Worth springing for the Lundahl output transformers? We’ll answer this in the next installment. what would i use to replace these in the digikey catalog? or any other catalog. 2 x LL1623/60mA Lundahl output transformer 1 x LL1648 Lundahl power supply 2 x LL1638/10H 140mA Lundahl power supply choke MQA-3G3 Jensen 100uF double metallized paper and polypropylene dielectric impregnated with mineral oil. Find top brands, exclusive offers, and unbeatable prices on eBay. Much thicker CNC aluminium plates (and therefore increased isolation and damping) on the P1 chassis. Nov 24, 2019 · PSE 211 needs an output at 40W class A1, and also double power to all (power supply) I select 211 not only for the power but for the sound quality, 6C33C sound as good as 211? Apr 4, 2019 · The newly available version comes with custom Lundahl output transformers, an ALPS potentiometer and sounds stunning. Most of our OPTs can be configured for different primary and secondary impedances. Keep in mind on the Buzz the transformers are just added post the output stage amplifier, where as in tube circuits they are generally part of the output stage circuit. P1 Mini has a single toroid for all. Actually, at first sight I thought the stock OPTs looked a bit small for an amp that purports to output 50wpc. 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 Jun 13, 2024 · Lundahl output transformer, recommendations by tube type Last Update: 06/13/2024 05:07:54 The transformer is wound with a special low capacitance winding technique to achieve best high frequency performance. Shinoda, both recommended Hashimoto's HW60-5 and HW100-5 along with several units Tube output Moving coil input Input and DC-free line output application Interstage, headphone and line output transformers Mains transformers Chokes Metal Housings 4 days ago · Most important, VK is offering custom Lundahl (LL2770) output transformers, at an upgrade cost of $525 per pair. It's a dual mono setup with separate left and right boards using the LL1933 for MC input, along with those cute little 6N17B-V military tubes. LL5607 is a C-core line output transformer designed for Calrec Audio, probably used as a 1. The specs for the output transformer are not given. Will try parafeed or dc coupled. Oct 10, 2015 · Hi Hun7er Have you heard any AudioNote or Lundahl output transformers? If so, which ones? What did you think of them? Glenn Rechnitzer is the name of my friend and amp builder. The company employs about 25 people and is located in the small town Norrtälje, just outside Stockholm, Sweden. Oct 12, 2007 · I'm liking the sound of this, and would like to know how good it can get with output transformers. Please allow 4-6 weeks shipping! Lundahl Transformer Sale, click here Jul 11, 2023 · I have a globally respected Euro-friend who builds custom 300B amplifiers on commission, cost no object, deep into five figures, and he's using the same level of Lundahl output transformers as the $1945 TU-8900 (below). April 27, 2021: Read a recent Stereophile review of the Lundahl version here. Total for the Lundahl AEGIS transformer set is US$1170. The core is an audio C-core of Lundahl`s production. If you have any questions about this product or need some help with your design please contact us. Hashimoto Electric sent three different models for this test; the HW40-5, the HW60-5, and the HW100-5. 5 : 1 transformer. Oh well. Audio Output Transformer LL1539 LL1539 is an audio output transformer for balanced drive. Primary Side of Lundahl with clear cover Listening Jan 29, 2021 · I'm thinking about building another amp, and wondering who is still building the larger power transformers in 2021. B. The pair of Wolfson WM8741 DACs operating in dual mono is far from uncommon, but Lumin’s decision to partner the Wolfson DACs with an output stage built around a pair of Lundahl output transformers is rather less conventional. The schematics call for the 2622 Input transformer, and the 2503 Output Transformer. Line input and line output transformers for galvanic isolation, balanced-to-unbalanced conversion and for impedance conversion. The product A Stereophile Recommended product, the Elekit TU-8600S Tube Amp Kit with Lundahl Output Transformer (LL2785B) upgrade is back! Do not hesitate in starting this DIY amp project, you won’t be disappointed. LL2785C is a new transformer designed for 300B and similar tubes in single-end operation. What Elekit developed is a tube amplifier with dazzling sound quality and super low noise that can also be used with headphones. All Lundahl's output transformers are of the dual coil single C-core type and can be ordered with a choice of core air-gap for Push-Pull or Single-Ended applications. So any ground loops is present now, or by surprise at a later moment, will not occur. It fe Lundahl is the renowned Swedish manufacturer of excellent audio transformers, which can be optionally installed in appropriately prepared SPL devices. Mar 26, 2010 · I'm new to tube amplifiers. Mr. Apr 6, 2018 · I decided to try a K&K diy kit, because at the time Lundahl had just come out with a new series of transformers, one of which seemed a likely good match as it had a turns ratio of 1:24. I need to find out what kind of transformers i put in an API 312. ALT-D=8Ohms. The construction it seems is more important but some people harp over design specifications. LL1527 has been generally accepted by the audio industry as the general purpose audio transformer. Apr 3, 2014 · The hardware that Lumin uses to perform this is a mixture of the conventional and more unusual. The transformer is available with different core air gap for PP or SE drives. Like the Fredenstein F660A, the F602 uses a DSP to continually monitor the 6386 tube and optimize its operating points. The new innovation of this microphone is in its switchable output circuitry. The LL1691B is available in PP and SE versions. For SE […] Jun 14, 2017 · Pass the transformer wires through the slots in the transformer sub-chassis. I've heard about people using torroid (power) transformers as a parafeed tranny. Mar 21, 2025 · The upgrade to the PH 9. That said, there are many variations of the OTL that can be had. Last Update: 09/08/2025 05:52:23 LL3733: Lundahl Output Transformer The LL3733 is a push-pull tube amplifier output transformer with 50% UL taps and a separate winding for 2% NFB. Sep 11, 2002 · Hi, I'm having a hard time deciding which is better. I am using it for a 6sn7 balanced (push-pull) line out. The purpose of the airgap is to accept the DC current of the output valve without saturating the core, leaving enough headroom for the sound signal) There are further 2 versions depending on what C-core material you Apr 18, 2020 · 18 April, 2020 Elekit TU-8800VK Lundahl Tansformers Tube Rolling TU-8300 Klipsch Heresy Review: Elekit TU-8800 (VK), Part II, Lundahl Transformers,Tube Rolling Review: Elekit TU-8300, Part II Review: Heresy I, Part IV Elekit TU-8800, Part I(has a pic of stock output transformers; tested with LS3/5A) May 6, 2023 · The output transformer is a Lundahl LL1935 Mic Input transformer, wired backwards in a 5:1 ratio configuration. Explore a wide range of our Lundahl Transformer selection. :) A few different types of devices will be measured and compared, here's a list of units under test NOTE: Transformers such as chokes, interstage, OPT's and the like are ALL made to order due to the many different sub types, ie mA/H ratings that Lundahl offers. The transformer is built up of two coils, each consisting of 3 sections, one primary and two secondary sections. Questions come like this: "Hello, do you have a transformer for the 845 tube ?" The situation1: The 845 tube has a Sep 8, 2025 · LUNDAHL Transformers We are the offical Lundahl distributer for Germany, Austria and Switserland. He makes two types of headphone amps: An OTL and a 300B amp. What's the absolute best output transformer (brand/material/etc) Buy the Trident LL1517, Lundahl Output Transformer Option at Full Compass Systems. Should be used with DC-free signal sources, or with a DC blocking capacitor between source and transformer. The Lundahl LL1620 C-core output transformers for tube amplifiers have a primary impedance of 3K3, 6K or 11. The DL 301 has a 0. Lead time Most transformers are made to order and incur a 4-8 week winding time, we do stock some popular models in which case Sep 12, 2022 · Step up transformer recommendations for an already high gain system Discussion in ' Audio Hardware ' started by dividebytube, Sep 12, 2022. This sheet with tables, provided by Andrea Ciuffoli, is a guide to find the most appropriate Lundahl output (and interstage) transformers to selected tubes. For this transformer we are using a new winding structure with minimal capacitive coupling between primary and secondary sections. Nov 21, 2018 · – Dual Mono Power Supply design for maximum channel separation LUNDAHL OUTPUT TRANSFORMER – LUNDAHL transformers needs no additional introduction. What made you select your current SUT? I use a Cotter MK2 but imagine there is much better options available today? The output stage sports a Lundahl transformer for a smooth presence. These five companies include Lundahl in Sweden, Tango, Hashimoto, P&C, and Andix. Only the output transformer stage with the famous Lundahl LL7401 transformers remains similar to the A1. The quality of almost any DAC System will be improved. How are these outputs? Comparable to Sowter Jan 8, 2024 · If you have a very low-output MC, the K&K Premium is available with Lundahl LL1941 transformers that will provide the higher gain needed. The analogue board is a completely new design based on the four Sabre chips. An unusual feature is the use of Lundahl output transformers in the dual mono analogue output stage, these should ensure excellent signal transmission to partnering pre- or power amplifiers, or even active speakers. 47, this includes a 10% discount, 15% tariff and shipping to the lower 48. Buy Trident Audio LUNDAHL OUTPUT TRANSFORMER Review Trident Audio null Oct 8, 2021 · Hi everyone! My first time posting here. Hear a review of the impact of the LL2777B at Passion for Sound Review of TU_820 Founded in 1958, Lundahl boasts over six decades of history. For the 8900 you can choose between the amorphous and standard steel cores of previous models. For the internal insulation of the LL1680 high-impedance sections, we used paper (and not polypropylene foil) to minimize internal capacitance. For SE transformers, the primary inductance variation due to signal level is less than 7%. A quick note about the Lundahl upgrade. Built and sold by Tube Sound Audio. Contact us Datasheets Schematics Audiophile (reproduction) oriented: The Audio Design Guide by Andrea Ciuffoli contains a large number of audiophile project using our transformers Feb 22, 2017 · 45 LuvCircles » Audio/Video Gear and Systems » Tube-o-phile Circle (Moderator: JakeJ) » Topic: 45 Luv Dec 25, 2012 · As others have mentioned names like cinemag, Jensen, and Lundahl all make transformers that are known and respected in the audio world. 2B, but features a Lundahl output transformer, providing a warmer tone than the original. These ten companies include James in Taiwan, Lundahl in Sweden, Tamura, Tango, Noguchi, Hashimoto, and others. Tube Amplifier Output Transformers LL1620 , LL1623, LL1627, LL9202 The LL1620, LL1623, LL1627 and LL9202 are output transformers for tube amplifiers. So you could potentially create an XLR to XLR with the LL1517 and test. 5U, and the H30-3. ) SUT's are not universal -not a one. As used in the Elekit TU-8888 monoblock kit. The use of C-cores with well-defined air-gap results in an almost constant inductance throughout the whole operating voltage range. A transformer that's a gift from the audio godz with cart A can Nov 6, 2025 · Lundahl Transformers is a world leading manufacturer of high performance transformers for audio applications. Tube output transformer selection list. We would like to show you a description here but the site won’t allow us. Onboard controls include a 120 Hz high-pass filter, a -20 dB input pad, a phase inverter, selectable +48V phantom power for condenser mics, and a dedicated output blend control knob. Lundahl upgraded LL2785B output transformers Check out sterling Stereophile review comparing it to amps many times May 26, 2008 · Transformers will start to saturate when a PA is distorting hard and the manufacturers specified frequency rating, even at full power, will mean less and less as the core saturates more. Most of their transformers can be configured for different primary and secondary impedances. If you want to read more on the subject, I recommend the following: Interstage, headphone and line output transformers Our tube amplifier transformers 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. 5K with secondary impedances of 4R, 8R or 16R, depending on how you wire them up. The windings are arranged to minimize destructive capacitive coupling between primaries and secondaries. Jan 29, 2023 · These functions can nicely be performed by a transformer all at once, and additionally we get an galvanic decoupling of the output. 1x LL2742 /150mA Power supply choke,1x LL2758 Power transformer,2x LL2765 /60mA Output transformer, 2x LL1667 /5mA tube Anode choke, 3x 1638 small transformer housing. Checking the LL1623 / 60mA yields 46H! That's considered very good already! Jun 30, 2024 · Love Lundahl products. Lundhal now offers the option of Nanocrystalline C-Core transformers for the following models as shown below. 98 watts and that doesnt include the losses of the circuit and output transformer. The Opto Element The opto element was the trickiest part to get right. 4 mv output, a 33 ohm output impedance, and the manufacturer specs call for a load of >100 ohm. This mic preamp can withstand levels from -60dBu to as high as +15dBu without breaking a sweat — no pad required. They’re an industry standard BUILT-IN OPTICAL NETWORK – Industry-first audiophile network streamer with built-in Optical Network capability The use of C-cores with well-defined air-gap results in an almost constant inductance throughout the whole operating voltage range. In order to reach the very best performance in terms of low distortion and low line output impedance, we recommend that our output LL1517 is an audio output transformer for balanced or unbalanced drive. Jan 1, 2002 · Lundahl is one of the world´s leading manufacturer of audio transformers used in many professional studio recording and radio stations so He have a very big experince and all these products use a custom audio C-core. LL5607 has an internal Faraday shield and a mu metal housing. The LL1680 line output transformer is made to match or exceed the specs of the UTC transformer LS-27. This reduces the effect of the capacitance between the primary and the secondary windings. The product with transformer is called: Channel One Mk3 – Premium Analog inputs & output; XLR & TRS Jack (balanced) Maximum input gain (Mic, +9,5dB – +68 dB) 13. Line Output Transformer LL1689 LL1689 is a line output transformer for tube amplifiers. Inductance= 8H. Alt-E So this is truly a very high quality universal transformer , that requires a good understanding of how to play with it , I think it is best if you use all the windings and especially all primaries in series. Jul 10, 2013 · Just wondering tone and detail wise, how would the Edcor RMX1 output transformer compare to the Lundahl 2912 and the Cinemag CM9888. Please select the Connection type for your console 1/4″ and XLR DB25 and XLR Lundahl Output Transformer (+$250. David Josephson In the e22S, we use a proprietary Lundahl amorphous-core transformer. Their product range includes power transformers, tube amplifier output transformers, chokes, microphone transformers, interstage transformers, input transformers, phono step-up transformers, and more. Buy SPL Studio Series Channel One Mk3 Premium Channel Strip with Lundahl Output Transformers featuring Improved Transistor Tube Preamplifier, SPL's De-Esser and Transient Designer, Compressor/Limiter with Noise Gate, Three-Band EQ Section, Tube Saturation Stage, Mic, Line, and Instrument Inputs, A/B Microphone Comparisons, Lundahl Transformer-Balanced Outputs, ±18V Internal for Enhanced Audio Apr 8, 2022 · You wouldn’t think it, I sure wouldn’t have thunk it, but transformers need break-in. Shuguang Black Treasure 300B. I had previously discovered that the Hammond transformers responded extremely well when cathode feedback was applied. Features Lundahl MC transformer - Transparent sound without coloration, unaltered cartridge characteristics Selectable load for cartridges internal impedance, 3 positions - Low 0. The LL1623 is the industry standard output transformer for valves such as 300b, 2a3 and EL84. A significant difference between Lundahl Transformers and other transformer manufacturing companies is that in addition to controlling the entire manufacturing process Nov 6, 2025 · Lundahl Transformers is a world leading manufacturer of high performance transformers for audio applications. The coil is wound using our high internal isolation technique with isolation foil between each individual layer of copper wire. Feb 16, 2011 · COMPONENTS All the audio transformers used in this project are Lundahl products. Nov 18, 2017 · The bench tests used square waves at 10Hz, 1kHz and 10kHz fed via a 50 Ohms output impedance TEKTRONIX CFG250 into the transformer's "primary" and the input/output monitored on a TEKTRONIX 465B Scope. 2BTX Preamp has all the same well-loved features as the standard MA-2. General properties Compact Low copper resistance High level capability For balance or unbalance drive Lundahl silicon iron C cores Driving circuitry for line output transformers should have low output impedance. The transformer has a special high flux, low distortion audio C-core of our own production. Lundahl have just released a new single-end output transformer, model LL3720. Larry Edit: Meant to say "what well known transformer would it be similar to" in my title. I enclose a shootout below which suggested that there is better out there than Lundahl, but I need others to give me their listening experiences. If you crack open the mic body, you'll see one of the most spartan circuit layouts I've ever seen in a microphone. I have a schematic from Led magazine for a single-ended 845 triode amplifier which I would like to build. I believe no one has ever posted about the difference between the stock output transformer of the TU-8900 and the Lundahl LL2785B, so I thought posting a thread about it could help someone in the market looking to get his first 300B amp and having a 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. The remainder or the assembly is as if using stock transformers. I discovered this big-time when I swapped Lundahl transformers into the Elekit TU-8340VK back in 2017. Part 2 of this review will include my impressions on the Lundahl upgrade. A significant difference between Lundahl Transformers and other transformer manufacturing companies is that in addition to controlling the entire manufacturing process (including C-cores, bobbins, pin Jun 18, 2011 · Rule of thumb for getting single ended output transformers (on the bass region, I'm a bass freak!) is to make sure there are plenty of primary inductance per kilo Ohm of impedance For example, for 2A3, the usual load is 2. In general: People think sometimes transformers are directly related to a particular tube, but this is not so. It was sent to me by the Swedish company and I am told it represents final production. Buzz Audio BE41 discrete opamps in the signal path with a Lundahl LL1517 output transformer. Pin configuration (as seen from PIN side) 6, 5, 4, 3, 2, 1 12, 11, 9, 8, 7 Usage (1. The A-1 is fully balanced and can output via either XLR or RCA The fully balanced Dual Mono analogue output module including legendary Lundahl Output transformers has been keeping music-lovers happy since the original LUMIN A1. Shop now for fast shipping and easy returns! After testing dozens of prototypes we decided in favor of 2 different recreations. Lundahl transformer-coupled design Armed with a Lundahl output transformer and electronically balanced line inputs, the 80B module delivers a sound that harkens back to Trident's fabled '80s-era recording consoles. The LL1663 is the industry standard output transformer for medium to high power valve amplifier output stages, such as KT88, EL34 etc. I looked at Edcor, Hammond, Sowter, Lundahl, Plitron, and this General Purpose Transformers LL1527 and LL1527XL LL1527 is a truly general purpose transformer for microphone or line input, for output and for galvanic isolation of units. Jun 13, 2024 · Thought it may seem hard to believe, primary and secondary impedance will stay the same this way, because the windings ratio will not chance. The electronics were designed to interface easily with either transformer or direct coupled mic preamps. All production takes place in-house, where we control every step of the process, from making our own C-cores, bobbins, […] Lundahl --- interstage FAQ on interstage and line output transformers : See diagrams for most common used tube circuits : FAQ : What impedance is the transformer ? Is it better to parallel tubes ? Feb 1, 2015 · Ten output transformers from five manufactures were compared on this test. Each SA-1B5 is packed with a custom-made input transformer in the USA and a Swedish-made Lundahl output transformer, both which precisely replicate the original ratios, frequency response and THD. Place two flat washers over each screw that originally secured the stock transformers. The Microphone transformers Microphone transformers are normally used for impedance matching: At mic preamp input circuits to match microphones to preamp. SPL MixDream 16-channel Summing Mixer 16 x 2 Analog Summing Mixer with 16 Inserts, Peak Limiter, and Lundahl Output Transformers Dec 2, 2024 · Lundahl output transformers on the P1 Dual-toroidal power supply (one toroid for analogue and one for digital - same as X1). u0003 Line input and line output transformers for galvanic isolation, balanced-to-unbalanced conversion and for impedance conversion. Audiophile Telos fuse. It features very wide bandwidth, low distortion and carefully designed primary and secondary loading networks to optimise the performance and give beautifully reproduced Oct 14, 2023 · Further Information: Bought in Dec 2022. The company is located in the small town Norrtälje, just outside Stockholm, Sweden. This upgrade uses specifically designed Lundahl output transformers (OPT) for the Elekit TU-8200 and 8200R and replaces the stock OPTs that shipped with the amp. It sure is a lot less costly (although not really all that much when you add the shipping rates). Thanks for any input. . Can't find any pricing on it, must not have much distro yet. 0X involves the addition of a pair of Lundahl gapped output transformers, commonly used in SET tube amps. Its only good for para-feed coupling because of its construction. The $15,000 Shindo Laboratories Cortese 300B amplifier uses them, too. Atarashi and Mr. 7 Jun 30, 2024 · This is a review and detailed measurements of the Lundahl Sound Systems VC2361 Balanced Multichannel Volume Control. The FET amplifier circuit, “a C609 Class-A discrete FET cascode front end,” is combined with a custom Lundahl output transformer. Review SPL 2384 Jan 12, 2023 · The P1 has dual femto clocks and an FPGA distribution system for the clock signal which is a trickle down from the X1. I use their products on my tube amp and they deliver great subjective sound But according to Amir above, this is a different company from that one. Radials lower cost Pro series use a beefy transformer that isn't a Jensen but still sounds decent. Mar 20, 2020 · (A pre-assembled version is available at extra cost. The C core Dec 31, 2020 · Hi, Can anyone please advise on which Lundhal SE OPT to use for an EL84 project, possibly the RH84 amplifier - revision 2 should it be the 50ma 35H or 100ma 17H The specs are - Tube amplifier output transformer LL1663 5k : 8 ohms The LL1663 is a four-sectioned dual coil C-core tube Lundahl --- interstage FAQ on interstage and line output transformers : See diagrams for most common used tube circuits : FAQ : What impedance is the transformer ? Is it better to parallel tubes ? Lundahl Transformers Lundahl Transformers is a world-leading manufacturer of high-performance transformers for audio applications. The Lundahl LL9202 C-core output transformers for tube amplifiers have a primary impedance of 23K, 11K or 6K5 with secondary impedances of 4R, 8R or 16R, depending on how you wire them up. From this experience when it comes to SUT's a couple of things need to be recognized - ignoring these will get a really bad result : a. Oct 24, 2021 · I have the LL1517 on the Knif Vari-mu, and preferred them over the amorphous core transformers. The use of C-cores with well-defined air-gap results in an almost constant […] NOTE: Transformers such as chokes, interstage, OPT's and the like are ALL made to order due to the many different sub types, ie mA/H ratings that Lundahl offers. 5S. This provides the step down to better match the high level signal usual on balanced outputs to the more sensitive single ended input. LL1691B: Lundahl Output TransformerThe LL1691B is a dual coil C-core tube amplifier output transformer for a 20K: 8R impedance ratio Based on the LL1691 design. Checking the LL1623 / 60mA yields 46H! That's considered very good already! Aug 8, 2013 · Why are there various output power ratings depending on the connection combination of the primary load? Say, you have a transformer with: 10K / 40W 6K / 100W 3K / 160W These are just sample numbers, but I am just curious about their ratings. Welcome to Our Schematics Section Whether you’re an audio enthusiast, a DIY electronics wizard, or a seasoned professional, these schematics provide a roadmap to unleash the full potential of Lundahl Transformers. Seventeen output transformers from ten manufactures were compared on this test. Aurorasound AFE-12 Step Up Transformer for MC Cartridges Introducing a SUT (Step-up Transformer) is the most elegant method both sonically and electrically to use a low-output MC cartridge with a MM Phono input. How to choose a transformers for the 845 Triode I have to answer this question so many times by email. In LL1539, the winding arrangement is such that (properly connected) the secondary windings are surrounded by cold (neutral) parts of the primary windings. 5 dBu (33. In additon we give technical support for countries where there is no distibuter. The circuit has the following parameters: Plate voltage: 1,000V Grid bias: -155V Plate current: 65mA With a Lundahl transformer-coupled microphone preamp and electronically balanced line input, the preamp boasts a wide frequencey range and accommodates a variety of signal levels with ease. All transformers are based on the same core size, winding structure and secondaries, but differ in number of turns (and thus impedance level) of primaries. 00) Type in quantity Lundahl Input Transformer (+$200. thanks guys! The innovative transformer-less input circuit yields clarity while the large Lundahl output transformer adds character. SPL Channel One Mk3 Premium channel strip with all tools onboard for recording voices, instruments and digital or analog audio sources with the highest sound quality: Transistor/tube preamplifier SPL's De-Esser Compressor/limiter with noise gate EQ section Headphone monitor Options: Lundahl I/O transformers for the microphone inputs and an output transformer for the output Out 1. RCA NOS 12BH7. 5 : 1): in+ pin 1 in- pin 4 connect pin 6 + 3 out+ pin 7 out- pin 11 connect pin 12+8 Faraday shield + housing pin 9 Lundahl Output Transformers All Lundahl's output transformers are of the dual coil single C-core type and can be ordered with a choice of core air-gap for Push-Pull or Single-Ended applications. General properties of Lundahl That's why the input transformer is more important in preamps, but to benefit from all possible sonic effects and full operational safety, both input and output should be equipped with transformers. In normal single ended use max outputpower is limited to 7. Mundorf Supreme coupling capacitors. I have put this together here, a short application information. Secundary: ALT-C= 4Ohms. 00 Buy SPL MixDream Model 2384 16x2 Analog Summing Mixer featuring Active Class A/60V Stages, DAW Channel Adjustments and Automation, Sum All Analog Tracks Before Conversion, 16x Balanced Analog Effect Inserts, Proprietary Differential Amplifiers, Link Multiple Units Together, Surround Cable, Analog Peak Limiter, Master Inserts, Lundahl Output Transformers. Like this transformer : Jenson JT-10K61-1M. LL2785C is a new tube amplifier output transformer, specifically designed for 300B applications. Nov 18, 2015 · I was given a K&K SUT with Lundahl transformer to try with my 301 MK II. Primary 600 Ohms. 0% Financing and Free Shipping on thousands of items! Line output transformers with silicon iron C cores. Jun 18, 2011 · I've been on audio shopping spree since a few months ago! These are the new DIY audio components that Damien & I bought recently. Apr 5, 2020 · I was wondering what members are currently using to drive phono preamps that do not have enough gain for low output MC cartridges. Lundahl Transformers is a world leading manufacturer of high performance transformers for audio applications. ” Tube Amplifier Output Transformer LL2785C for 300B and similar triodes in SE applications The LL2785C is an output transformer for single-end tube amplifiers, suitable for the popular 300B electron tube. The MCL uses transformers supplied by Lundahl of Sweden and is a superb step-up transformer designed specifically for modern low output moving coil cartridges and optimised for use into moving magnet phonostage inputs. The LL1660 by Lundahl or the Sowter 9050. The transformer is built up from two coils, each consisting of 3 sections. Assemble the screw and washer combos to secure the transformers. The addition of these transformers also means the elimination of a pair of chokes and coupling caps, all in the signal path. The total configuration, so two transformers in parallel, behave like this: Maximum Ouput=140Watt. In tube microphones for matching high impedance tube circuits to normal output impedance. For example, for 2A3, the usual load is 2. Hashimoto Electric sent two models for this test; the H507S, the H20-3. Popular DAC IC's Feb 2, 2008 · Input/Output Transformers options?! API 312 Hey guys. Here are opinions on Hashimoto transformers from three testers. In ribbon microphones to transform very low voltage, very low impedance ribbon motors to normal microphone output levels. The LS-27 was used in the RCA Tube Mike Pre (which was used in BC-2B Consoles). I believe no one has ever posted about the difference between the stock output transformer of the TU-8900 and the Lundahl LL2785B, so I thought posting a thread about it could help someone in the market looking to get his first 300B amp and having a Oct 8, 2021 · Hi everyone! My first time posting here. ) Prices start at $1185 without tubes and top out at a $2985 version that includes Lundahl output transformers and deluxe German-made Elrog 300B tubes. Each coil consists of three sections to optimize leakage inductance Feb 11, 2022 · I recently saw some Lundahl LL1933 transformers (same as I'm using) in a really nice Polish phono preamp by Super Sound Device, the SE-PRE01. A new winding structure improves HF frequency response by minimizing destructive capacitive coupling in the transformer. For those of you unfamiliar with Mesh plates,please note that these beasts can handle a meager 28watts of anode dissipation compared to the standard 300B and therefore extra care should be taken when replacing normal 300B's with mesh plates. 00) Type in quantity Tube amplifier output transformer LL1663 5k : 8 ohms The LL1663 is a four-sectioned dual coil C-core tube amplifier output transformer for 5 k: 8 ohms impedance ratio available in PP and SE versions. This will be it. Jan 23, 2022 · The CU-29 is a large diaphragm, cardiod-only, tube mic utilizing a NOS EF-95 tube and a Lundahl output transformer. Oct 29, 2025 · SPL MixDream 16-channel Summing Mixer 16 x 2 Analog Summing Mixer with 16 Inserts, Peak Limiter, and Lundahl Output Transformers 1 review Write your review Item ID: MixDream View all 8 $ 3,299. Mar 1, 2020 · I think what you probably want is series input and parallel output, with the shield connected to the RCA ground and a very short low capacitance cable between the transformer output and the amp's RCA input. Many parts were upgraded. We list their current production line. The advantages of parafeed is that there is no dc current Nov 7, 2017 · I have been looking around at push pull output transformer. The best way to contact him is via HeadFi: Oct 19, 2021 · I shot him an e-mail, chatted for a bit, and placed my order for the amp along with a TKD pot upgrade, Lundahl amorphous output transformers (OPTs), and a pair of Silvania 12BH7s. Add them to your TU-8200 or 8200R and a great amp becomes quite magnificent. A significant difference between Lundahl Transformers and other transformer manufacturing companies is that in addition to controlling the entire manufacturing process Oct 10, 2020 · Almost a year ago I posted this short IMD comparison of various transformers in a iso box review by @amirm, and promised that I'll try to follow up with a more detailed post. The Channel One Mk3 can be ordered with an optional input transformer for the microphone inputs and an output transformer for the output Out 1. 5k, meaning at least 25H is needed at primary side. (The air-gap is adjusted during manufacture to suit) Push-Pull 60mA Single-ended 90mA Single-ended (N. Elekit TU-8340VK Follow-up: Reviewed with Lundahl transformers and Triangle speakers Was that really five years ago? This thread was running at the same time as the Cheap SE output transformers thread which lead to another thread The Edcor meets the 6AV5 which explored the combination of cheap transformers and cheap $3 output tubes. Maximum DC current=460mA. Please allow 4-6 weeks shipping! Pro Audio Pro Audio Video Transformers Audiophile Audiophile Transformers Nanocrystalline Core Transformers Transformers for Dynaco amps MC Cartridge Sep 25, 2016 · I've been looking at different transformers and I've noticed there good ones and bad depending on application and not really by brand. Their rectifier chokes, power transformers and output transformers are of very high quality. In “passive” mode, the mic’s ribbon transducer is coupled only to a Lundahl output transformer, much like the Lundahl-option Fat Head II. nisgl wul vogag jiov hrc orrq numq hytu tfsi ehjjbx jmvxo jcz fqlv tmcqe zeyegd