El84 pp diy. Oct 21, 2005 · Hello! I have built the attached circuit.

El84 pp diy. The Mini Block tube amps use a 5751 twin triode to drive the EL84 push-pull output stage which is biased into class-A operation, ultra-linear mode. This video is my first attempt at making a youtube video and basically features steps on how i made my FULLY DIY Tube DIY Central Amplifier Hardware Bias Tools Boards and Board Making Parts Breadboards & Accessories Cabinets - Guitar Amp Capacitors Chassis & Enclosures Diodes, Chips & Rectifiers Fuses & Fuse Holders Germanium Transistors Hardware Jacks & Plugs Kits - Guitar Kits - Guitar Pedal Kits - Tube Amp Kits - Other Knobs - Amplifier & Control Opto DIY ECC802S SRPP / EL84 (6BQ5) Push-Pull Tube Amplifier Project that uses a constant current source (CCS) bias. Best of luck with your build. I'm a beginner, still not choose any schematic for my project. That OT claimed primary impedance 8k and output 4ohm. Nov 14, 2005 · What's your favourite EL84 tube? There doesn't seem to be a big range of them, and I seem to recall reading that NOS ones don't always handle the higher voltages of some modern EL84 amps. No opinions from others, no endless babbling from internet blogs, I wound up with a near-perfect amplifier that drives my hungry floor-standing Advent Maestro's (4 ohms) with ease and grace. Made for 220v, and I have 235v in my outlets, so I had to get rid og 15v. Baby Huey, El Cheapo, and The Red Light District. DIY ECC802S SRPP / EL84 (6BQ5) Push-Pull Tube Amplifier Hm, but this OT is 8k. The preamp has been modded along the Jun 17, 2011 · The EL84 draws about 50 percent more filament power than a 6V6 and the elements are packed together much more tightly. Feb 25, 2017 · An amp project especially for first-time builders of a single-ended design using the 6BQ5/EL84 tube in triode mode. Could you recommend a good Circuit Diagram for EL84 PP? Mar 30, 2020 · Hey all! I'm beginner with vacuum tubes and recently decided to build amplifier for PC speakers. A fair few guitar amps pump more volts in than they are supposed to Jun 2, 2003 · The EL84 had better treble response, the 6V6 better bass. 875 vac on primary - check my math here) Power Transformer - Jul 6, 2023 · I can offer this: a very simple 100x100mm board for push pull EL84/6BQ5, using ECC82/12AU7 as a phase splitter. Nixie Tube Clock. com: 5. Atarashi designed this amplifier based on the EL84 schematic diagram published by Rogers in England. Jan 29, 2019 · Dynaco Push-Pull EL84/6BQ5 or 6V6/6AQ5 Tube Amp Schematic Push-Pull (PP) EL84 (6BQ5) or 6V6 (6AQ5) Tube Amp Schematic with Dynaco A-410 Transformers. They are rated down to 30 Hz though. Need to know about the transformers- what voltages and amps windings from power transformer (PT), and impedances from output transformer (OT). Explore the world of DIY audio projects with these Push-Pull EL84 Mono Block Amps. The dynamics of the exchange rate change for a week, for a month, for a year on the chart and in the tables. An Ultra Linear [wired] EL84 has a plate impedance, rp, of approximately 3. 2560 today as of 3:10 AM UTC. Dec 26, 2024 · Preferred Series 7189 (EL84) Vacuum Tubes - thetubestore. The EL84 tubes can be wired as triode mode ( original design has pentode mode only) or ultra-linear mode ( if the output transformer Nov 10, 2019 · DIY EL84 Push-Pull (Class-A, Ultra-Linear) Amplifier - 30 September 2012 Bruce Heran of OddWatt Audio outlines the design and construction of monoblock Push-Pull EL84 (6BQ5) valve amplifiers. Nov 26, 2023 · A pentode [wired] EL84 has a plate impedance, rp, of about 40k Ohms. The „Push Pull” name is from the contralateral system. I like the open and detailed sound, but this is the second EL84 amp I've built with this OPT and in both cases, I've found the bass to be just slightly muddy My reference track for checking May 29, 2007 · EL84 PP is supposed to have 8k p-p in Class AB1 PP pentode-mode. Has anyone come accross a schematic like this that I can copy? Also I am fairly new to the audio world using tubes and I have a few questions 01. Oct 14, 2017 · Hello! I am looking for a good sounding PP EL84 power amp. I built a single channel push pull amp from the Dynaco 10W schematic found everywhere. I'm going to divert from conventions here. 6K or less, right? This LM317 help with the cathode bias, and if I right, are you suggesting that my problem could be fixed with this? Sep 12, 2025 · Board index » DIY Forums » Vacuum Tubes / Thermionic Valves All times are UTC [ DST ] Mar 30, 2007 · I have some old parts in my stock and would like to make something usefull with then. The intention was to make a simply solution with a very good OT trafo. Whilst the 7189 /can Just monitor closely on first powerup for any signs of red plating in the power tubes. May 25, 2019 · I plan to build 2 Baby Huey stereo (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). You will get all of 5W, not all of them in Class A. The schematic calls for 8k and I need 8 ohm output, with a 4 ohm output being nice to have but not strictly needed. dieroehre1. I used 1k8 which is ample above 1k35. - I have 95 dB sensitivity speakers, so the low-ish 5 watts of power produced by a triode-strapped PP EL84 amp would be enough. This is a full-tube amplifier. Output iron was Hammond 1650E. I like the sound of the Audio Note amps very much but this are too expensive for me I now that the Audio note output transformer are very good and a part oft the sound of this amps. I have Hammond output transformers and chokes for my project. Then the output stage with fixed bias and a Red line represents the push-pull loadline with an 8K Ohm push-pull transformer and bias current set to 28mA. I would like to create a Push Pull amplifier using EL84 tubes. 2014 * Why I chose the EL84? - because I have a Siemens matched quad and a dozen soviet military 6P14P-EV tubes. Inspir Aug 8, 2013 · Just started to build this stereo tube amplifier based on 4xEL84 and 2x6N2P tubes from Die Röhre, Wulfert audio. Screen grid failure is the most common reason for the death of EL84s. My speakers say May 25, 2019 · Try searching for Mullard 5-10 output transformers or EL84 push pull transformers. The push-pull EL84 tube amplifier schematic is from the book "Build your own Audio Valve Amplifiers" by Rainer zur Linde. Since the 2006 write up in Stereophile, its price has skyrocketed for a low powered integrated amp. Default Tubes: 6N1 2 EL84 4 6E2 2. Can anyone help me in finding some tested shematics? Thanks a lot Dec 23, 2019 · The El84 Push Pull amplifier is a classic all-tube design that has been used by guitarists and sound engineers around the world since the 1950s. It went together with only one hitch. com circuit board is now built and playing music. The Finalé Audio F Jan 9, 2021 · The El84 Push Pull Amplifier is a classic piece of sound engineering that has been used in a multitude of recording studios and live venues around the world. One good example of the triode-strapped EL84 PP output stage is the John Broskie's amp, though I'd personally would go for individual EL84 biasing and slightly higher quiescent current (680. 750R+100uf for the each cathode instead of those 400R+1000uf common ones). There is more information available about tube power supply design in the Power Supply Design for Vacuum Tube Amplifiers article. Convert 5 USD to EUR with the Wise Currency Converter. See my build in the link. Dec 31, 2008 · Skorpio, I tried Bruce's implementation of the output section on a Chinese 6L6GC push-pull amp and it immediately sounded better, wider frequency range and more clarity. Fast and accurate currency conversion. Mar 4, 2021 · Push-pull EL84 kits (~13 WPC) are available on eBay from China for ~$300 to $350 US. thetubestore. I fired it up on the weekend and initial impressions were that it was Ok without being anything special. I would recommend one of those. The board's component arrangement highly adheres to the original design, but we have the below provisions to make the board a better featured amplifier : 1. Tube Amplifier. Like Morgan Jones Bevios Vally and the Simple 84, but both of thesse run at about 10watts. USD/EUR - Live exchange rates, banks, historical data & currency charts. I listen mostly at moderate levels, with the occasional loud burst, but Feb 18, 2024 · Post Views: 7,496 El84 diy amplifier featured Steve graham amplifier build tubelab simple push-pull amp By Steve Graham 2020/02/06 DIY, Preamplifiers, Tubes 3 Comments Author Topic: EL84 PP bias & load setting - schema review (Read 2903 times) 0 Members and 1 Guest are viewing this topic. Likely even better with new trannies. What might be a problem, though, is the primary current demanded by the 6L6s, which may be DIY ECC802S SRPP / EL84 (6BQ5) Push-Pull Tube Amplifier Project that uses a constant current source (CCS) bias. This type of amplifier is widely recognized as one of the best ways to achieve that vintage tube tone that has energized music for decades. Twentyish years ago I bought tubes and transformers for an EL84 PP project. Schematic is from the Dynaco Super-Fidelity Output Transformers catalog. 2 days ago · Use our free USD to EUR converter for the latest US Dollar to Euro exchange rate. I am going to build an EL84 or 6P14P-EV PP amp. May 4, 2023 · @madabouttubes -Hi! I m an Indian Audio enthusiast" Mad about Tubes". 12 watts of dissipation is really running that tube hot! I bet it sounds great, but you'll be changing out the tube very often I think. Jun 19, 2021 · Greetings to everyone. This is not an unique circuit design by any means. Can anyone recommend me a nice sounding (not very DIY Solid State Projects DIY IC / Op amp Projects The EL84 (6BQ5) / 6V6 Push Pull tube amplifier schematic and text below is from the Dynaco Super Fidelity Output Transformers catalog circulated around 1955. For the power supply, are 400V rated poly caps (such as Solen) beefy enough? Jul 21, 2025 · Vielen Dank für Ihr Verständnis und Ihre Mitarbeit. Mr. 5Vrms at full power? If i have 2 nputs, one a CD player, and the other is a Computer, which has a minor output, how May 25, 2019 · After testing several transformers for EL84's, I settled on the Dynaco Z565 in ultralinear duty, along with Gillespie's Enhanced Fixed Bias system. My experience with both cap coupled and direct coupled amps is that the direct coupled ones have the highest transparency which I consider the most important property of a high quality sound system. Apr 7, 2018 · I managed to pick up a non-operational DIY EL84 PP amp. So far, I see Tango as a serious contender. The simplest push pull ones are probably the self inverting amplifiers. Analyze historical currency charts or live US dollar / Euro rates and get free rate alerts directly to your email. Inspired by Audio Note EL84 PP circuit PCB 2. Easy to build Least number of parts Easy to understand Easy to get the Nov 24, 2020 · Looks to me like you have the tubes for single ended (SE) or push pull (PP) design. Many will work, many will work very well. Mar 26, 2011 · EL84/6BQ5 Push-Pull Power Amplifier Few tube amplifiers sound as sweet as two triode-connected EL84s in push-pull. Jul 1, 2013 · Hi , i'm building an EL84 PP Amp and i want to try a pentode in the front-end , since i've only 1 socket for input stage and phase splitter i would try ECF80 and i need gain to accomodate GNFB. 8x Vacuum tubes (6N1 2+EL84 4+6E2 2). com. com Feb 9, 2009 · Since the EL84 is a true pentode* with a suppressor grid and all of the fun secondary emissions stuff that happens during clipping, I'd expect them to "respond" differently than a 6AQ5/6V6. Aug 27, 2025 · New build - PP EL84 Page 1 of 2 [ 16 posts ] Go to page 1, 2 Next Page 1 of 2 [ 16 posts ] Go to page 1, 2 Next Feb 5, 2008 · I've used output transformers with primary Z of 7. com FREE DELIVERY possible on eligible purchases May 10, 2006 · These are my parts for Diy this projects, all are dismounted from the old PP amp I have used before. Aug 4, 2022 · When you use two EL84 as an LTP phase splitting output stage (with a CCS in the 'tail' cathodes), won't the output power be reduced because the gain is reduced? The unbalanced signal goes to the grid of V2, while V3 is a sort of grounded-grid amplifier stage, so the output stage sees half the driving voltage it would see if it had balanced inputs. The USD [United States Dollar] to EUR [Euro] conversion table and conversion steps are also listed. All bought here on DIY Audio years ago The trannies are from a Chinese EL84 amp Output Transformer - Assumed 8 ohm tap and 8. For musician's use and to promote 'sag', the two output diodes may be replaced with a EZ80 or EZ81 rectifier valve, although you should also provide Aug 2, 2011 · It is an acoustic tube amplifier based on popular and easily available tubes ECC83 and EL84. basically to have for pre-amplification 1 or 2 ecc83 - ecc81 and for output to have 2 el84 (push pull). Dec 27, 2021 · I have been working with my El 84pp, Tubelab clone for some time now. I have never used either. This is the bare PCB of a tube push-pull power amplifier board with reference to the well accepted ANK L1. Sep 6, 2014 · The tube rectified power supply uses an EZ81 tube. It also inspired many DIYers to modify this gem in various website s. It a follow-on revision of previous boards using the same mechanicals. I have seen many many EL84 push-pull schematics, and all of them was working from about 300V supply. the rectifier will be made of diodes so we are talking about Oct 3, 2020 · I certainly don't want to discourage anyone from building an amp like is discussed here, but I was going to ask about PPP EL84/7189/6P14P vs PP 6550's (or something similar) for an amp where I want about 30W - 40W out? Aug 4, 2016 · Hello all, Selling off some Audio stuff I now know I may never start. 5 output transformers, and a 10H, 200Ω 180mA choke. Get the latest and best $5 US Dollars to Euros rate for FREE. 1. Has anyone actually built this thing? 2. The A26 is a true 88dB efficient, 8 ohms minimum speaker, with an ultra-simple x'over too, no less. Utilizing the 5751 driver tube and EL84 / 6BQ5 tubes, this push-pull amp delivers exceptional sound. Jul 20, 2023 · This guide discusses all relevant aspects for an integrated push-pull vacuum tube amplifier design, including the power supply unit. The OPT sound very good I knew the OPT for El84 PP amps isn't expensive but I wanna DIY all parts, modify the above design as well Apr 12, 2020 · OK, again you are following the schematic which is nothing like the PCB. 05. Check the latest currency exchange rates for the US Dollar, Euro and all major world currencies. I've built 3 different EL84 PP amp designs, finally settled on which one I like the best- it's been fun learning Nov 26, 2023 · The "ultimate" tube said to at least equal the performance of old EL84 tubes is 6P14P-ER (Russian 6П14П-EP) with a 10,000 hour rated life and the same specs otherwise except a slightly higher heater current. 5K Ohm 0-8Ω-16Ω EL84 Push-Pull Output Transformer for DIY Tube Guitar Amplifier : Industrial & ScientificIndustrial & Scientific › Industrial Electrical › Passive Components › Transformers › Audio Transformers No featured offers available Learn more No featured offers available We feature offers with an Add to Cart button when an offer meets our high standards for Jun 14, 2005 · Last week I took delivery of one of the chinese "Music Angel" EL34 Push Pull Amps. what is so interesting in this design , is Dec 3, 2023 · Somehow way back in 2011, I went down the "home theater" rabbit hole only to find out that it wasn't so great after all. On russian forums found simple schematic of single-ended amplifier with 6N3P (6H3P) and 6P14P tubes. About 10 years later I discovered that I had simply stopped listening to DIY Röhrenverstärker EL84 / ECC83 Push Pull Gegentakt Tubeamp Tupeamplifier Verstärker Amp Amplifier LowPowerAmps 474 subscribers Subscribed Jun 14, 2012 · The HF-81 is probably the most talked about EL84 integrated amp in recent years, at least in the USA. Join me in exploring original schematics and components for this project. Set rate alerts for USD to EUR and learn more about US Dollars and Euros from XE - the Currency Authority. com Stereo PP Endverstärker (Leerplatine) EL84 autobias sym | on eBay (search) If anyone has experience to build this kit, all tips will be much appreciated Nov 26, 2023 · I'm looking for recommendations for ouput transformers for an EL84 push-pull amplifier. 6L6 needs 9k p-p for Class A in PP pentode-mode with 360v plate voltage and 270v screen voltage, or 8k p-p for Class A in PP triode-mode with 325v plate & screen voltage. Mar 27, 2022 · Have built some amps, a couple of el84 pp, but I did not like the sound I got from them! But then I found the schematic of the Tubelab el 84 PP, built the amp, , and the amp sounded just fantastic. 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. This amp is push pull, not single ended. You may notice 7189 has less gain and hence clearer headroom, you would compensate by nudging the vol knob a little higher. Jan 22, 2006 · The Mullard EL84 data sheet says 10ka-a for PP EL84 triode-strapped. be/DDLFGM6CIKE An EF86 pentode (V1) acts as a preamplifier, a double-triode ECC83 (V2) forms a differential amplifier, and finally two EL84 pentodes make up a push-pull stage, that drives the loudspeaker via an output transformer. Mar 14, 2021 · EL84 based PP amplifier: Baby Huey EL84 Discussion in ' DIY ' started by dBel84, Mar 14, 2021. 2k (28 vac on secondary reads . The fast and reliable converter shows how much you would get when exchanging five US Dollar to Euro. . Aug 10, 2023 · View attachment 1153290 This is a redplating EL84. 6k based on the Ultra Linear tap percent, 40% or 26%, respectively. 5k or 5. Aug 12, 2021 · Hello everyone . I have a couple of EL84 push-pull amps that I bought off fleabay a while ago, they are supposed to be "Suppo" but their internal layout and schematic seems a lot different to ones I've seen posted here Apr 24, 2020 · There are 3 EL84 PP that have been developed on the forum. Can any one help me from beginning to build this amp? Please guide me from point to point, schematic->PSU->OPT, auto bias or fix, UL or no UL in short everything Apr 12, 2020 · Quarantine forces me to resume a long ago forgotten project. This time it will be an EL84 push-pull integrated/power amplifier. I ask again, how were you fully planning to build this out? I assumed he meant following the schematic on that ebay page, where Oct 27, 2021 · I'm thinking the 3. I haven't seen an EL84 amp with 8 output tubes so I'm a bit nervous of going there. Can you give some feed back on the following transformers with pros and cons and if it were you what would you Oct 24, 2018 · hi everyone! Long time Ok, I have a EL84 ANkit with stock OPT ANK Audiokits - L1 EL84 Integrated Amplifier I want to put into my amp better OPT. 2 days ago · The EL84/6BQ5 is well regarded as one of the finest audio output tubes among MT tubes, with a maximum plate voltage rating of Ep = 300V, a plate dissipation of Pp = 12W, and a maximum push-pull output of 17W. Why? What did I Feb 18, 2022 · Stereo Push-Pull EL84 Vaccum Tube Amplifier PCB DIY KitDescriptions:This is DIY Kit (Not include tubes), need you solder it by yourself. Aug 8, 2008 · It's an EL84 Push Pull using hexfred rectification and one of his PSA phase splitters, and I have a few questions before tackling this little monster. MY conventions. Mar 23, 2017 · There aren't any really new EL84 PP designs that create significant cost benefit improvements from good vintage engineering. Finally, we deign the power supply. I think, that's very simple, common. 3 days ago · 5 US Dollars are worth € 4. New build - PP EL84 Page 1 of 2 [ 16 posts ] Go to page 1, 2 Next Page 1 of 2 [ 16 posts ] Go to page 1, 2 Next Sep 4, 2023 · Amazon. May 25, 2019 · EL84 8k output transformer from Toroidy is only 56€ TTG-EL84PP TOROIDY - Transformateur: de haut-parleur | TME - Composants electroniques less than half the price 😀 I have no interest in this Company, but I like to spend my cash with the best quality for the lowest cost 🙂 To me, EL84 in SE or PP hooked up to very efficient speakers, just almost always sounds good every single time -- it's just a really great of an all around vacuum tube that is plentiful, inexpensive, and easy to deal with in a build (I've built one complicated flea powered DHT amp for a guy, sounded great, but not for me). any suggestions! looking for the pair of opt under 800 USD! Push-Pull stereo integrated amplifier Max Output Power 2x ~12W @ 1 Volt peak input signal, with 16dB global negative feedback Power Stage: 2x 2 EL84 power vacuum tubes in Push-Pull Ultra-Linear configuration and fixed bias Phase Split Stage: DC coupled Concertina with 12AX7 vacuum tubes Input Stage: 12AX7 vacuum tubes with self bias and bypass Apr 13, 2002 · I have a 269JX Hammond PT, only has 60mA so I wanted to build a amp with one pre-amp tube in the 12AX7 family and one EL84 hooked up in Class A, SE. The 6V6 had girth while the EL84 had Dec 27, 2024 · The nominal value for EL84 PP (trioded) is 270 ohms (Vb 300V). Are there stability or other issues related parallel push pull in audio? 4 days ago · Who is online Users browsing this forum: bobbyg4s and 0 guests Having completed my first DIY speaker build in years (Seas A26), I'm really wanting to try a lower power tubed amp again. Jan 4, 2018 · Hello and happy new year to everybody! I'm working and this Amp since a couple of months,the principle is based on Menno van der Veen's idea readable here: Menno van der Veen, audio electronic research & consultancy The chalenge was to use SMPS either for the heating,H. I would love to build a PP amp, using EL84 tubes. Of course, buying a board is the easy part. In attach the schematic: it use a 6922 with the first section at gain and the second as cathodyna. This simple, yet powerful design is reliable, reproduces sound accurately, and has excellent low-end definition and natural warmth – making it ideal for a wide range of musical applications. Headphone Amplifier. "Figure 3 illustrates a low power circuit (12 watts at less than 1% distortion) which is similar to that used in many of the medium priced commercial amplifiers. You need more lamination and more copper wire. Get the latest 5 US Dollar to Euro rate for FREE with the original Universal Currency Converter. Any good schematics foe a single ended EL84 practice amp? Or, has any of y'all built one? Dec 28, 2009 · I finished the first (serious) revision of my transformer-coupled EL84 push-pull monoblock. Tadaatsu Atarashi. Convert 5 Dollars to Euros with an online currency converter. I'm building a DIY Audio Note Oto SE amplifier using EL-84 tubes in a parallel S configuration. Atarashi chose this design because of the uniqueness of the positive feed back Dec 21, 2009 · The EL84 (6BQ5) / 6V6 Push-Pull tube amplifier schematic and text below is from the Dynaco Super-Fidelity Output Transformers catalog circulated around 1955. When playing string can show pine fragrance of the violin incisively and vividly. Get ready to enhance your audio experience and unleash your inner audiophile. Thus, with just a single input/phase-splitter tube, such as a 6N1P or 12AT7, we build a fine push-pull amplifier. A Triode [wired] EL84 has a plate impedance, rp, of about 1. But first define simple. I have the biasing LED construct for the Red Light District, but would build baby Huey next. Sep 15, 2025 · Learn the value of 5 United States Dollars (USD) in Euros (EUR) today. An intermittent resistor was giving me fits…but once diagnosed and replaced, it was all smooth sailing. If you get any, you need more cathode resistor. Also, explore tools to convert USD or EUR to other currency units or learn more about currency conversions. Now that we have a poweramp/integrated using EL84, it's going to be called "Simple EL84". Yea! The amplifier uses a Lundahl LL1540 input transformer for the phase splitter, a 12A*7 driver tube (12AX7 currently installed), and Edcor transformers. Tubes used are dio triodes of small power – ECC83 (control) and power stage implemented on power pentodes – two Sep 12, 2025 · Who is online Users browsing this forum: No registered users and 0 guests This is my version of a EL84 (6BQ5) Single Ended Stereo Tube Amp. Primary windings in the UK look decent and shipping won't be a killer. The design goal is to boil off and control as many electrons as a 6V6, but with a smaller plate. May 27, 2013 · See this push pull circuit. Bear in mind I'm using better in a very loose way here, not an accurate way at all. Stereo imaging was'nt particularly good and it was a bit "covered" indicating too much 2nd harmonic Feb 18, 2022 · Buy ICToParts 12AX7-EL84 6P14 PCB Board Push-Pull Power Amplifier Bile Machine DIY Kits G12-013: Amplifiers - Amazon. I want to make an power amplifier for guitar which is up to 20 watts. It has some nice vintage iron - an Engel 350V transformer, two Partridge 8000:3. 8K - 10K PP with triode connected EL84 and have noted only very small differences in performance with real speaker loads and indeed on the bench as well. Convert 5 US Dollar to Euro using latest Foreign Currency Exchange Rates. Apparently this was produced to rival Mullard's 5-10 design. As before, we will proceed backwards. I can't read your website page about it but would like to know more, can you explain the circuit in english please. That bias voltage is not out of the realm of proper for an EL84 either, and by nature cathode bias runs hot. Sep 10, 2025 · Get the latest $5 US Dollars to Euro rate for FREE with ⚡ Real-time Currency Converter. I gave it at least 100 hours of break in before some serious listening commenced. The Tubelab SPP (simple push-pull EL84 amp) is a sweet little amp. What are your speakers that only require 10 to 15 watts and go down to 20 Hz? There are Hammond hates in the DIY community but Shindo sees fit to use them in their entry level (~$8K!!!) amp. 8k would handle parallel push pull outputs with 2 EL84's per side. They'll start to draw a bunch of screen current when the plate and control grid head toward zero, where Jun 5, 2017 · The 6V6 is a less sensitive tube than the EL84, so a circuit designed to drive a 6V6 to full power will be seriously overloading a skinny '84, making it sound quite different. Not open for further replies. Valve Audio Amplifier Output Transformers for Push Pull circuits When hard wiring you might sometimes encounter some instability around the EL84 and grid stoppers together with a small capacitor of 50 - 100pF from g1 to ground will stop that. For about twenty years ago I bought a transformer for 250v and 6,3v. I would think most recycled EL84 UL/Pentode output transformers will provide more than adequate service in triode connection. I'm currently running Toshiba EL84s in a highly modified Classic 30. Nothing an EQ pedal wouldn't solve. com Order Preferred Series 7189 (Premium EL84) vacuum power tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amp. I have a 8k output transformer (without UL) 2 el84 and a ecc82. just pcb 25€/excl vat complete powersupply for stereo 125€ excl vat all components incl tubes & transfo for 1 channel 125€ excl vat Hello to all This is one of my latest designs , i needed a cheap high quality safe amplifier , so i chose for the el84 with 300 volts on the plate you get approx 10 watts , so in parallell PP you get some 20 watts . 2 mm thick PCB Size: 170×223mm All the parameters are printed on the PCB Power transformer: AC250v 350ma 6. Is this a good schematic? Has the ecc82 a proper gain for a input a . That's the typical dissipation of el84 tubes in push pull amps. Instant free online tool for USD to EUR conversion or vice versa. - I will build a bigger KT88 push-pull someday,… Sep 30, 2012 · The PoddWatt is a small Class-A Stereo EL84 (6BQ5) Vacuum Tube Amplifier that will provide about 5 to 7 watts of high quality sound. DAC & Audio Adapter. We also use a 1K Ohm screen stopper resistor Rscreen to connect the EL84 screens to the ultra-linear taps of the transformer. It is also one of the few tubes still in current production, since it continues to be widely used in guitar amplifiers. Let's discuss and improve upon AN's designs together. I have to buy 1 output transformer to make a set so I need to decide what configuration I'll use. To make things easier (maybe) I ordered one of these 6N4 / 12AX7 + EL84 / 6P14 Push-pull Tube Power Amplifier 10W+10W Stereo Amp PCB 699998773739 | eBay It's 3 days ago · Who is online Users browsing this forum: No registered users and 0 guests Jun 20, 2019 · Hi, i want to build a simple el84 pp amp. Oct 21, 2005 · Hello! I have built the attached circuit. View charts, tables, and get a transfer quote. Found these schematics on the web Feb 25, 2020 · Post Views: 8,416 diy el84 amp el84 amp comparison featured Steve graham amplifier build tubelab simple push-pull amp By Steve Graham 2020/02/25 Amplification, DIY, Tubes 4 Comments Nov 1, 2019 · By Steve Graham Can success breed success? Like the efficacious DIY Phono Stage from 2018, I’m going have another go at a DIY project. We built a variation on El Cheapo (triode Class A) and it is stellar. A suitable power supply is shown below. I haven’t used them before but thought I would give it a go. The 6N1P is a fine little tube and about 1Vpk of input signal Feb 1, 2015 · EL84 UL Push-Pull Stereo Power Amplifier with Hashimoto Transformers This amplifier was originally featured on the October 2003 Issue of the "High-Fidelity Audio: Radio Technology" by Mr. The 6l6 I think that is 6. 3v 4a Output transformer: Primary 8k to 12k, ＞25 watts Wow. Oct 7, 2008 · The Sovtek EL84M gets a bit of a panning whereas that EL84-C is the best EL84 I have for that amp, strangely my EVJh prefers the stock Sovtek EL84. Some audiophiles are excited about it and some are disappointed. We start from the output stage, then the splitter and input stages. Feb 9, 2011 · EL84 was intended as a cheap bottle for domestic consumer wireless and picnic box gramophones, it is actually quite nasty (but suits guitar amps The EL84 has a fair amount of gain for an output valve, intentional to allow delete of a pre-amp stage. 01. 8K resistors, 1/channel, and 2 22uF caps, 1/channel. Xraytonyb on YouTube did a build series on one of these a while back. 7k Ohms. Dec 21, 2009 · DIY Push-Pull (PP) 6V6 / 6V6GT Tube Amplifier with Hammond Transformers DIY Push-Pull (PP) 6V6 / 6V6GT Tube Amplifier Schematic This 6V6 amp was built following the push-pull (PP) EL84 / 6V6 Dynaco A-410 output transformer schematic. Thus far, the performance has been excellent Aug 4, 2006 · Hi Jan, I really like your Mini EL84 pp circuit, can you tell me what value of feedback resisitor you settled on. Maybe the EL84 chimed and sparkled, while the 6V6 growled and rumbled?. Push pulls, being more efficient, can do a hell lot more power. www. This amp produces around ~3 watts. May 24, 2009 · A push-pull triode EL84 schematic by Thomas Martens - LowRedMoon - Tube DIY AsylumA push-pull triode EL84 schematic by Thomas Martens Posted by LowRedMoon (A) on May 24, 2009 at 10:16:49 It's been while since I completed this build and I think that a post about it is well past due. Almost all of them could deliver about 10W. The grid stopper resistor Rg, generally used with an EL84 vacuum tube, is 1K Ohm. Aug 27, 2025 · •Default Tubes: 6N1 2 6P14 4 6E2 2. Sep 18, 2010 · Hi all, I'm a newbie here and looking to build a push pull using EL84s about 25watts. Three winters ago, while I was on an extended work assignment away from home and holed up in a Boston hotel with Mar 4, 2020 · Hi all. Solid bass performance required to 20Hz. Nov 26, 2023 · It looks like with your budget it might be a set of Hammonds for you. Beside that, EL34, EL84, and 12AX7 vacuum tubes are used in many practical examples, to design the various parts of the circuits and to compute the values of the needed components. •1 x Full set amplifier kit (not assembled, need diy soldering). Taken in a dark room that's normal. For the power supply, are 400V rated poly caps (such as Solen) beefy enough? New build - PP EL84 Page 2 of 2 [ 16 posts ] Go to page Previous 1, 2 Page 2 of 2 [ 16 posts ] Go to page Previous 1, 2 Aug 8, 2008 · It's an EL84 Push Pull using hexfred rectification and one of his PSA phase splitters, and I have a few questions before tackling this little monster. If not i got 7v on Nov 24, 2020 · I'd suggest going for the triode mode for the EL84. As the volume rose, the changes became more pronounced. Oct 7, 2005 · I use EL84 frequently in voltage regulator circuits and early on I had a lot of problems with VHF oscillation which manifested itself at dc and within the 20kHz audio bandwidth. These amazing little power tubes are quite efficient, requiring only 15Vpp to bring them to full output. Convert 5 USD to EUR with live exchange rates updated daily. If the grey structure which is the plate starts glowing it's pulling too much current into the grid and/or plate. - I will build a bigger KT88 push-pull someday,… EL84 push-pull valve power amplifier circuits Circuit #3 This third version below is the 'GEC 912+', that uses two ECC83 triodes in the front end. It seems the ruggedized / military / selected types will handle a bit more juice and abuse than the standard spec. It had 2xEL84 output valves per channel, with ECC81 and ECC82 as pre and phase splitters, and an May 10, 2006 · I'd like to biuld an PP amp using EL84/6bq5 tube with 12ax7 driver. Has anyone got a schematic for a 4xEL84 (per output stage) based on either of these designs, and a really good PSU to Oct 28, 2018 · Can anyone offer recommendations for a reasonably-priced kit or DIY instructions (ideally with prefab chassis and PCB) for an EL84-based stereo power amp? I'm just getting into tube sound and currently have a (cheap) Monoprice Pure Tube amp. diyaudioprojects. I had all components and started to build it. com, Simple Push-Pull (SPP) EL84 Amplifier PART 1: Cost Breakdown and Parts Ordering Information By Steve Graham But before we get right into it, a special thanks to our patron Erik in Seattle for ‘sponsoring’ this project. The build will start with the Simple Push Pull board available from Tubelab. Mar 13, 2020 · VVT in the UK still makes decent ones as far as I am aware but costly. Dec 16, 2019 · By Steve Graham As promised in the preview, a prototype of the EL84 amplifier based on the Tubelab. But my circuit delivers only 5W undistorted. Should I use some sort of B+ time delay (or toggle) for standby? 3. it is DIY kis Not Assembled or Finished item. Get started today at www. to have only volume (ie to be clean). V and ancillaries Jun 23, 2023 · @madabouttubes- This is demo of a previous video about my DIY EL84 PP Tube AmplifierLink of my previous video: https://youtu. Jan 27, 2020 · Forget Edcor, it will cost more for shipping than the trannies. Yours just have heaters showing, due to the orientation of the tubes - the slots in the plate structure are lined up facing out. Some schematics are not tested (some of those will not work, and some of them Will work). Components I have - 6N3P-EV, Tesla 6CC42, 6P14P Sep 26, 2021 · Hello! This is the last circuit I have developped around a push-pull of EL84. S. Aug 24, 2021 · Recommendations for PP EL84 circuit diagram I welcome everyone. Poor/lightweight bass performance is not Hi All, I have been lurking here for a while and learnt plenty reading the topics here. I like single ended better but it gets freaking expensive if you need more power. The PCB has a spot for the 47uF cap, 2 6. Our currency converter is simple to use and also shows the latest currency rates. So, the impedance of your OPTs seems to be in the ball-park. Most are simply minor changes that self promote themselves as a new design. Jul 24, 2016 · PP EL84 Tube Amplifier Schematic (ECC83 input) - [15 Watts, PP, class-AB1] PP EL84 Tube Amp Schematic with Dynaco A-410 (12AX7 or 6SL7 input) - [12 Watts, PP, class-AB1] Aug 4, 2022 · You will find many simple push pull EL84 amplifiers (and many simple push pull 6BQ5 amplifiers). USD/EUR analysis, check out best exchange rates, historical data & currency charts. I just built one using old Heathkit iron and it sounds good. Vacuum Tube Push-Pull Amplifier Kit - Part 1 - YouTube May 31, 2006 · Hi All would like some advice on an EL84 Push pull Amp schematic As i have only built one tube SE Headphone Amp I am keen too have a go at this simple looking Amp Would like to now if its worth it for Home Hi FI is it likely to sound good and be worth doing You can see it hear image 5 Chapter 6: Step by step design of a push-pull vacuum tube amplifier In this chapter, we use all notions introduced previously to design, from scratch, a stereo push-pull tube amplifier. Jan 26, 2021 · I am thinking of ordering some output transformers from Ali Express. The same amplifier performance at 5 Watts out, is more difficult. Then a design using what you have may be advised. Feb 20, 2022 · Anyone has assembled the copy of AN EL84 board below? Stereo Push-Pull EL84 Vaccum Tube Amplifier PCB DIY Kit AUDIONOTE?Just wandering about the sonic character and if there is enough gain to use as an integrated amp Jan 15, 2020 · Wall Of Sound DIY Special Project: Thunderbirds are Go! The Tubelab. Apr 21, 2015 · Actually EL84 is hard to beat in push-pull if you are inclinded to try that out using ecc88 - Morgan Jones' "Bevois Valley" amplifier is a nice one to start out with if it your first build. Also used some simple 15W output transformers designed for guitar amps without UL taps so had to run a SG resistor off B+. There are a few minor deviations from the original schematics. To do that, you have to run it hotter, wind the grids tighter. I never should have given up my 2-channel tube amp in favor of a 5-channel solid state monster. Tamura dont offer el84 OPT, hashimoto neither. •Output Power: 13W × 2 (class AB push-pull). Nov 26, 2023 · Push pull, using global negative feedback, you can easily get a clean 1 Watt sine wave output at 20Hz; and with a frequency response at 20Hz that is only -1 dB less than at 1kHz. I heard one and it sounded good but I think there are many Build your own high-quality tube amplifier with this DIY project. Here is what I have: 350-CT-350, 6,3V, 5V Power transformer 8K, 10W PP w/ UL taps Output transformer RCA 5R4 Rectifier RCA 8BQ5 (smoked glass) Power Pentodes For de pre-amp/phase-splitter I have one Siemens Apr 29, 2018 · I've recently completed an EL84 PP amp using fixed bias and ultralinear. mwyso lgsm eisj qxia adka xof wikyqnz xyvlbasq erisic wztknrm