DOES ANYONE HAVE A SCHEMATIC FOR SOMETHING SIMILAR TO THIS. My question concerns the 100 ohm pot in the filament of the 300b. all of the audio and modulator sections which are and part numbers on the schematic diagrams dif- Grid leads for Tubes JAN~2A3 (Vl and VQ) (/'"T~95) Q Shields are present. I WANT TO BUILD IT. Presumably, someone wanting to build a 300B design wants to do so because they like what they have heard from the tube in other contexts, not because what they have heard from the tube in other contexts is terrible. The VT25 amp and the 2A3 amps have very similar schematics. Mar 27, 2023 · 2a3 a class single-ended electron tube parallel amplifier circuit Sun audio sv-2a3 set valve amp 2a3电子管(真空管)的超凡境界 听sun audio sv-2a3胆机_haodiy_音响电子电脑科技diy小制作发明 Sun Audio SV-300BE (new chassis) stereo 300B SE amplifier kit from Japan. Jul 3, 2023 · Sun audio sv-2a3 stereo amp. My experience with these amplifiers compels me to assert that this topology is a "ROCK AND ROLL TERRA INCOGNITA" in America. Tuning and modifying a JC Morrison style 300B DIY tube amp. Jul 12, 2019 · My CD deck/phono stage is plenty capable of driving it with no preamp. sun audio sv-300be Schematic. Aug 23, 2023 · Years ago a friend loaned a Sun Audio VT25 amp from the mid 2000s. Web best 300b amp schematics. Not even the same in the 2 channels. First, I quote a comment on Audio Asylum: ". ©2024 - 悅聲音響 REFERENCE AUDIO - Weaver Xtreme Theme Mar 16, 2010 · Yesterday I received my latest addition to my SET collection, a eBay hong-kong SUN SV-2A3 clone. Metal Oxide Varistors Explained 25 Jun 2024. I already have EL34/KT66 amp so it makes sense for me to lean towards Elekit 8900 because I want to try 2A3. Sun Valley - 300B | Vacuum tube, Valve amplifier, Diy speakers. Sv 2a3 audioSun audio sv-2a3 amplifier – d a r k l a n t e r n dc circuit, circuit Sv-2a3 sun audioUchida / sun audio, japan röhrenverstärker mit 300b und 2a3 trioden. The tube complement of the MKIII is the same and the comments and measurements you've made seem similar to hers. It appears to be the dominant and preferred arrangement in their DIY audio community. ~Tom ••• Mar 15, 2020 · Chính vì vậy, mạch sun không nên là mạch hay cho người mới bắt đầu. I have an Analog Discovery 2 and using the excellent and free Audio Analyzer Suite I'm running a few tests. I owned the original amp- a Sun Audio 300B from which this schematic seems to be a copy. There is only one cap between the input and the grid of 300B, the swing is good, about 160 vpp. Apr 7, 2023 · Audio sun 2a3 amp sv stereo wordpressSv-300b sun audio Audio amplifier sv sun 1350 soldSun audio schematic. Schematics 2a3 valve tension amplifier liaison vtDiy 2a3 amplifier 2a3 300b amplifier tube guitar2a3 audio mono sun ultra amps rare special. Morrison. Conrad-Johnson CAV50 Fase Nimis VAC Avatar . He has spent several years working over and fine tuning 300B push-pull designs using interstage transformer coupling. The auto detect circuit for both 2A3 and 300B tubes is pretty interesting and the option to toggle between feedback and no feedback makes for some nice diversity with tuning options while avoiding the analysis paralysis of having too many options. Sun audio schematic Sun-audio_vt-2a3_3. I ended up changing to a cascode 6SN7 design and it worked well for me. Feb 11, 2023 · For right now I'm looking for 300B suggestion to try out on the Kaiju. Feb 15, 2017 · This circuit’s roots date back to 1929. Web what i notice about the cary 300b amp schematic: With 450v across the 300b, i bet it is not a 2. I built two 45 amps with LL1620 and LL1620AM which is specified to work at 30mA. Morrison’s SE 300B tube amplifier circuit, which will be called the “original schematic”. It's the whole circuit that has a specific transfer function. The schematic here is exactly what I built about 20 years ago but sold. Sun audio sv-2a3 stereo amp Sun valley Audio 2a3 sun amplifier tube mart. Sun-audio-sv-300be, 300b, tube-amp, lambalı-anfi Oct 21, 2023 · In 1989 Sun Audio released their first kit amplifiers for the home audio market—the SV-2A3, SV-KT88 and SV-300BE. And thats the problem with those amateur gear and their schematics on the free internet. so I choose back to 6sn7. Sun Audio schematic. Now, we deliver all of our SV-amplifiers except SV-300BSM with exchanging among three kind of power transformers just like below in order to be used for all over the world. The amplifier was bomb-proof packaged, a big thumbs up for the seller. I have them alongside 2a3 set, 300B 91a knockoff (thanks Joe R. Jun 11, 2021 · This is easily 3X the output of the original circuit and it sounds so much better. Sun Audio Sv-2a3 Schematic (2) , Air Tech Sv C (2) , Dep 11 (2) , Lab 11 (2) , 4th Ech Maint Shops. Loftin and S. The circuit design is old school: Choke-loaded triode direct coupled to DHT driver, transformer coupled to the push-pull 300B output tubes. That was a typical audio system for the Japanese at that time. Jan 7, 2009 · Only around 250V anode-cathode voltage The 300B is running in the specs of a 2A3 Plate dissipation is only around 15. Tamura transformer 300b audio amplifier sun sv tubes canuck mart canuckaudiomartAudio sun 2a3 sv stereo amp wordpress 300b single ended amplifier ordinary circuitSchematic gizmo. Feb 16, 2011 · the my new reference 300B Amplifier max performance to drive high efficiency loudspeakers started 16 february 2011. 50k mono attenutors, (2). Oct 24, 2023 · Tube/valve amplifiers use potentially lethal high voltages. My first DIY amp is 6SN7 cascade to drive 300B, similar to Sun Audio circuit. 1) 100V version. But some parts values had been altered. Audio sun 2a3 sv stereo amp wordpressSun audio 2a3 tube amplifier photo #2277411 Sun audio sv-2a3 stereo ampAudio 2a3 sun amplifier tube mart. Wavelength Audio Cardinal 300B . A copy of these papers would be appreciated. I've heard stories of 300B's doing thermal run-away, though, with the cathode resistor in place, that really should not happen. But then all came differently! Carsten Bussler had the idea that he would like to use his collection of 2A3H. C. My 2nd place daily drivers generally hang around for 3-4years. A hard-wired is used for all of the circuit. Sep 29, 2002 · I was wondering,have you heard any other 300B amps,and if so how do they rate ,relative to the Sun Audio 300b Re: Sun Audio schematic, posted on October 2, 2002 at 13:48:40 hagustos Aug 21, 2004 · 300B PP You might also consider one of Lynn Olson's designs. Once the 300B starts drawing grid current, the driver will "fart out", so don't expect the best result from this. 5W effective output from each channel-Each block contains an 100VA Power transformer, an 10H choke and an 35W output transformer-All of the B+ and filament voltages are regulated by LM317-Soft start for filament voltages (to prevent inrush current from Nov 29, 2023 · Sun audio schematic. The input/line amplifier stage consists of a single 6SN6 dual-triode tube, with one half of the tube used for the left channel and the other half for the right channel. If IT wil choose E180CC IT( 15~20K:15~20K 1:1 IT) to 30b SE. Single-Ended Stereo Power Amplifier. 5V=5VAC的電壓,而把中心經 500 ohm25W(有100MFD160V電容傍路)電阻接地做回路,這樣可以進一步 Jun 22, 2024 · I can see that the guy , who took out the components in this amp, has put in some wrong values and wrong places in the filament/cathode circuit for the 300B´s. (which means no Circuit Board). The filment circuit is more complicated as the 300B tubes run on 5V DC in order to minimize hum. There is no audible hum, even with the Altecs. Apr 22, 2023 · Sun audio sv-300be 300b amplifier for sale Sun schematic meta gizmo Tamura 300b transformer sun audio amplifier sv tubes mart canuck canuckaudiomart Otomon laboratory (音門ラボ) / sun audio we91b type 300b se stereo tube Mar 13, 2016 · 上次做好的300B音色，多位朋友都話很好！今次用盡方法做一部更好的？原來的各式牛不用，訂購了更高級別的TAMURA F2007 先看看所有配件！絕大部份原裝零件不用！ 再一次做一部SUN AUDIO SV-300B 升級版 ,Hiendy. Sv-2a3 sun audio Dec 1, 2023 · - One think Skunkie did not like about the Sun Audio design is the 300b plate voltage is strangely low, around 300V. Mar 14, 2024 · Audio sun 2a3 sv amps Sun audio schematic Sun audio / uchida triode amps. Dec 5, 2021 · One point I would make is that I would abandon the Sun Audio topology with the 6SN7 entirely and use the Western Electric 91 amp as my inspiration and drive the 300B with a 6J7. The attached schematics is a works in progress that I will plan build to build but I thought I would share my design end 300B amplifier makers choose the single-ended type and I wanted know why. Some people think a certain tube has a certain sound, but tubes themselves don't make a sound. Sep 6, 2014 · It is not necessary to use Western Electric 300B vacuum tubes. 15th Century Map of New Rock and Roll Territory Mar 19, 2009 · That is, lots of people like 300B amps. Good 300B tubes seem expensive, 2A3 not nearly as spendy. Anyway, Gizmo seems to like it! Here The result is the "Fatboy" 300B amp - named as such because, like me, it is a tad overweight. SP'H—HSISLA, and SUN—ASHPA. Web The Sun Audio 2A3 Or 300B Schematic From The 1980S Is Fundamentally For Driving Very Efficient Speakers, Classically. Minecraft Mob Farm Schematic 03 Mar 2024. Web the sun audio 2a3 or 300b schematic from the 1980s is fundamentally for driving very efficient speakers, classically. There several classic circuits that it. I did a compare with the SV-300BE & SV-2A3 schematics, and I found the different is filament voltage is 5V and the 300B runs on 3k5, 2A3 runs on 2k5. Jul 12, 2019 · I would go with the first schematic, it's a bit simpler. 5k or a 3k primary. Moreover a bifilar 1:1 IT would be the best choice for excellent bandwidth. Aug 20, 2017 · A direct coupled push-pull 300B amp with input sensitivity high enough that it can be used without a line stage preamp is possible, but it would require 'stacked' power supplies and a center-tapped plate choke for the push-pull driver stage. Integrated amplifiers. Dec 15, 2010 · I have a 300B SET amp with 150mv input sensitivity and 100k ohm impedance. com You can see that it has not been soldered yet. I found the schematics on Goggle. Jul 23, 2023 · 300B SRPP Amp. Jul 18, 2021 · The Sun Audio 2A3 or 300B schematic from the 1980s is fundamentally for driving very efficient speakers, classically the Western Electric 755A, Altec or Tannoy 15" in a small room. Oct 29, 2020 · Look at the circuits of Sakuma San. H. INTRODUCTION This new reference design born like an upgrade of my 4300B SE and It is the best choice to drive hi-end full range loudspeakers with high efficiency like Lowther, Fostex and Fullrange-Speakers. All of the transformers are specially manufactured by Tamura Corp. But in the schematic I posted, the first half of a 6SN7 is AC coupled to the second half, most likely to provide more drive for the 300B, without another stage and tube. Aug 11, 2008 · I have just bought a set of SunAudio 2A3 AMP, due to my speaker is not allow me to drive on a low voltage AMP I try to modify it to drive in 300B. Audio sun 2a3 stereo amp sv posts . Since 1989, the Sun Audio SV series has been an iconic range of Single Ended Triode amplifiers. Web what i notice about the cary 300b amp schematic: Web the sun audio 2a3 or 300b schematic from the 1980s is fundamentally for driving very efficient speakers, classically the western electric 755a, altec or tannoy 15. Otomon laboratory (音門ラボ) / sun audio we91b type 300b se stereo tube Oct 19, 2018 · Now that I have a pair of Fortes I want to build a 300B amp. Sun schematic meta gizmo 300b srpp ampli amplificadores supply amplificador retour début bonavolta circuitos Otomon laboratory (音門ラボ) / sun audio we91b type 300b se stereo tube 300B tubes are driven through the interstage transformer. 5W, it has the advantage over the 2A3 and 300B because its idle current is only 30-35mA. for the inspiration on that one), and a pair of 300B "Legacy" (T. Sun audio sv 2a3 e clone di sbisa' audiocostruzionicom2a3 amps tube looking amplifier audio scratch stereo built coupled Jun 21, 2019 · As to the OP's question, “why is it designed like this?” On the one hand it is easy to say: because the designer wanted 750 volts, and didn't really embrace the idea of finding a 550–0–550 volt transformer and a pair of HV rectifier bottles, and the complications of HV rated capacitors (usually strings of lower voltage rated ones… with voltage-sharing bypass resistors), and so on. Interstage Monoblock 300B Parallel SET Amplifier Construction Manual Version 3. Warm-up time is said to be only three minutes. This amplifier uses the excellent tamura audio transformers and elna cerafine capacitor. Sep 18, 2018 · Never seen blocking. I already own a quite a few different pairs of the 5670 input tubes so I'm set on that front. The rectification circuit is standard and the use of other components is reduced to 14 pieces only (including 2 pieccs 1 ohm 10W resistor for the 300B filament ). Jun 22, 2024 · Apparently the two ; MA300B and MH300B share the same schematic. Audio sun schematic meta gizmoSun audio 2a3 tube amplifier photo #2277409 Sun audio sv-2a3 power amplifier tube type voltage converter, powerSun audio sv 2a3 se upgraded version (3835503837). Mar 24, 2020 · If you want to do it right, the simplest way would be to use these modules (one per 300B of course); Tube filament supply If you want a more DIY approach I recommend these kits; Rod Coleman DHT Filament Regulator I have first hand experience - I run a derivative of the Transcendent 300B SE-OTL amps - thats four 300Bs per channel, single-ended Sun Audio Sv-2A3 Schematic. If he Jan 26, 2024 · Hi all, I'm looking to tweak my Sun Audio monoblock amps a little (just some cap and resistor changes and maybe a separate filament transformer) and I thought I'd start with some baseline tests before I change stuff. The driver is V2. sk zw output 2. My first amp build as well as my first journey into tube amps. That direct coupled cascade 6SN7 design just doesn't have enough drive for a 300B tube. Like the Linlai 300B-N, Cossor 300B, Psyvane 300B-NSen and the Linlain 300B-T2. I get the impression that using 300B in push-pull mode with 6SN7 drivers is a popular circuit in Japan, although the the Sun amplifier has only a single driver and uses a transformer phase splitter. Dec 23, 2004 · The circuit posted previously was wrong, the Sun Audio SV300B MkII is a 300B Push-Pull circuit. Specifications for SV-300BE Tubes 300B x2, 6SN7GT x2, 5U4G x1 Circuit Design Single-Ended class "A" operation without negative feedback Power Output 8W + 8W Input Impedance 100k ohms Input Sensitivity 150 mVs Hmmm. Jul 12, 2019 · Primary: 2,5k or 3,4k 18W I would like to build a 300b stereo amplifier or two mono amplifiers for my HiFI. Jul 12, 2019 · The 300b can go from inaudible distortion to quite audible, just by changing the values of the surrounding components. However, if you are going to use a GZ34 rectifier, you should reduce the HV secondaries to 375-0-375, otherwise your HV will be much too high. Dec 5, 2009 · Then, I though I could, with good schematics, and some tools and some (a lot of) work achieve some thing that can make good sound around the third of this price. Since these transformers come with lead wires, it's easy to assemble. Real happy with my Tribute input tranny, so that will stay. The design parameters made sense: no coupling caps, a 6SN7 input tube is connected in parallel to a transformer phase splitter which drives the output stage. May 16, 2006 · I choose EC52 caps couple to 300B. 300B drives 300B, thats the style I mean. Web was hoping that there are some fellow audio hounds who have built a sun audio sv 300b mk ii and are willing to share the wealth (so to speak). A proper 300B amp without stressing the tube. The schematic in post # 1 shows a 6SN7. Web the amp does not waste precious 300b tube; May 2, 2021 · Just finished building a Sun Valley SV-S1616D from Victor, checked voltages and hooked it up this morning. Morrison's SE 300B tube amplifier circuit which I will refer to as the "original schematic". 22uf 630v silver or copper oil coupling caps,(1) 47uf+47uf/500v blackgate wkz. com Aug 12, 2013 · Assuming that the designer didn't want to save money getting rid of "serious driver" for 300B (since it was their flagship 300B amp with golden plate engraved "for the joy of music) I can only guess the single parallel 6SL7 simply sounded subjectively better. This is just the teaser! The DIY 300B amplifier circuit design and components usage are not very luxurious or exotic due to cost but it is pretty good on audiophile standards. Schematic Symbol For Connector 07 Oct 2023. There was no capacitor or coupling transformer between the driver and the power stages. The best wire cutter. Review of the Japanese Sun Audio SV-300B by the outrageously entertaining (and sadly late) Harvey Rosenberg. 300b tube audio sun amplifier transformers tamura se stereo type decision busines term making please before read soundgate Jan 27, 2024 · here's the schematic here's the existing layout internally 47uf+47uf cap from the CLC and the 2 x 100uf 300B cathode resistors poke out the chassis at the top, but they take up little room internally so can probably stay in place (disconnected) Here's a very rough test-fit of how the C4AQ caps could be placed (bottom left ones will fit further Sep 22, 2020 · It should be a very “normal” Sun Audio triode amp, which can be operated with 2A3 and also with a 300B as power triodes, as I have built it many times before. Loudspeakers. May 2, 2021 · I still think it’s a good kit to have for those that want to dabble in 300B and KT variants. It uses it efficiently, in class a2. Apr 28, 2015 · The circuit that I decided to follow for my 300B triode amplifier I found on this site, the 300B Single-Ended (SE) tube amplifier schematic with direct coupled 6SN7 input stage. 7k 2w sch515 330v 500v/47pf Mar 1, 2005 · I LIKE WHAT I'VE BEEN READING ABOUT THE SUN AUDIO 300B PUSH PULL AMP WITH AN INTERSTAGE TRANSFORMER FOR THE PHASE SPLITTER. but my kit still use EC52-300B. If you changed the socket from an 8 pin octal, to a 9 pin noval, and changed from a 6SN7 to a 12AX7, the circuit will not work properly. The first amp to hit the Ojas online store will be the SV-300BE, sold in kit form, beginning next Tuesday, October 24, at 10am. Web september 2020 robert graetke it should be a very “normal” sun audio triode amp, which can be operated with 2a3 and also with a 300b as power triodes, as i. The Sun Audio SV-2A3 is approached with a very minimalist design, which conforms to the “less-is-better” rule of hi-fi. The amplifier was purchased through eBay end of January and shipped to Holland with surface mail. pinterest. I always wanted to take a shot at designing a class A2 single ended 300B amplifier. At that price you can also pickup some WE300 B tubes. That's mighty hot I wouldn't go past 400 V, 65~70 mA. As said, the first 2 stages are direct coupled, which is always good, IME. It has two 100k ohm volume pots. The first information concerning the Loftin-White circuit was published by E. With 450v across the 300b, i bet it is not a 2. I'm sure the 300B can handle even more drive but this sounds nice for a very simple circuit using 6SN7 tubes. SRPP: Fugedaboudit! This is a trendy circuit used by folks who don't understand what it is or how it works. can be used for 300b tube. By the way, C3 in that schematic is another example of what I was talking about at ** above. Aug 1, 2013 · Thứ nhất con trở thoát 300B theo chỉ định là 880R/25W bạn dùng 1K là cao quá dòng sẽ thấp xuốngNếu là mach Sun thì cọn tụ thoát là 47uf/160V và phải dùng loại BG nó mới phê cơ. Avantgarde Acoustic Uno Avantgarde Acoustic Duo Audio Note ANJ/SPX speakers Gallo Acoustics Nucleus Micro KEF 104/2 speakers M+K MX 2000 subwoofer . Audio 2a3 sun sv stereo amp coded wiring provided colour niceSun audio sv-300be l anniversary limited edition 300b integrated tube Free audio service manualsPin on 300B x1, 6SN7GT x1, 6V6GT x1, 5U4G x1: Circuit Design: Single-Ended class "A" operation without negative feedback: Power Output: 6W: Input Impedance: 100k ohm: Input Sensitivity: 150 mV: Output Connections: 8, 16 ohms: Frequency Response: 20-23kHz/-1dB, 16-26kHz/-3dB: Noise level: less than 1. A very nice driver is the 6SF5 which operates at sub 1mA anode current. The power transformer should be capable of at least 250mA. Web web the sun audio 2a3 or 300b schematic from the 1980s is fundamentally for driving very efficient speakers, classically the western electric 755a, altec or tannoy 15. Sep 15, 2023 · Sun Audio 300b Schematic 03 Jul 2023. ROCK AND ROLL TERRA INCOGNITA. Jan 23, 2004 · Konnichiwa, Some notes, the "Walton" 300B Amp is basically the JE Labs Amp which in turn borrows heavily from the Fi-Primer and Sun Audio. More about Ladyday SE 300B 91 tube amplifier (circuit diagram) – DIY Hifi Supply Last edited: 2017-11-17 4:58 am Jul 11, 2004 · Lundahl LL1620 SE 30mA OPT for 45 tube I found that even the output power of the 45 tube in SE mode is only 1. Re: Sun Audio schematic - lakerfan 12:48:57 09/30/02 In Reply to: Re: Sun Audio schematic posted by Derick on September 30, 2002 at 00:09:25: My Upgrades for the Sun 300B stereo are(2) D. --Sun Audio 300B (5k output), VT25, 2A3 Cary Audio (Audio Electronic Supply) SixPac Mono Block Amplifiers, $1,800. jpg. In this case a D3a. Web Once The Heater Heats Up, The Crackling Sound Will Go Away. (which means no Circuit Board. for reference. Screenshots of the schematics (which show voltage measurements at key locations) together with their transient analysis graphs are attached. 08, August 2019 audionotekits@rogers. Audio sun schematic meta gizmo. There is actually a Sun Audio SV 2A3 (the same amp with the filament tap connected in series) on auction right now that was converted to the WE 91 amp schematic. I've done a few videos on it and the resolution is to convert it to a cascode. 我們曾把兩支300B管子的燈絲並聯及接上一個2. You simply made a complete different animal of this fine tube amp design. 5W So even without cathode feedback, the amp could only make around 4W, assuming 25% efficiency. 1½ watts difference can't be Aug 11, 2008 · Sun audio 300B never had a polite "milk toast" kind of sound. Note 2: The rectification stage schematic is now shown. 5 is the basis for what I'm calling the Albertine 300B, an unmodified WPA 3. 2A3 Single-Ended Stereo Tube Power Amplifier Altec Peerless Oct 19, 2021 · -Doing things a little different with the DHT platform. Victor was great responding to a couple of Qs I had in a few steps during the build. ••• SUN AUDIO SV2A3 amplifier Amplifier, Audio, Diy amplifier from www. Please refer to the SE 300B schematic for details on Mr. ) Specifications for SV-300BE. Feb 6, 2021 · I owned my '73 911E Targa for 20yr. People get religious about heating a DHT, I'm staying clear of this one 3) I used 5K after reading and talking to folks I trust who said you get a bit more output power with a 3. Price $1,975 KIT Assembled with 4 VCAP ODAM X 4 $2,450. 5K with a little more distortion, or a little less power with a 5K with less distortion. . SUN AUDIO SV-2A3 Dec 14, 2017 · The amp sounds very good, surprisingly good considering the unsurprising circuit schematic. Sun-audio 300B Stereo Tube Amp PS I have been using a assemblage ST-300B since 1997 and for chamber music jazz and acoustic and vocals it can’t be beat. 5 6SN7 stage with a 300B output stage dropped in. That is due to its elegant circuit and component selection with lots of carbon comp resistors and selected capacitors. AudiogoN Forums: how good is the sun audio sv2a3 Vendo Finali Sun Audio 300B mk II euro. But I can't really find schematics using this tube in its higher output configuration. But this schematic shows Dec 5, 2021 · 1) Sure if you want to. Sun Audio 300b Schematic. I get this isn't a "Holy Grail" design, but it's a huge improvement on the "JC Morrison/Sun Audio" directed coupled driver setup and this could easily be used to mod amps built on that topology like the BoyuuRange A50. Sep 18, 2018 · That would also imply that the 300B is used more efficiently. I would buy this in a second if the boss would let me. Procedure The very first thing I needed to have was the schematics. The 6. May 6, 2009 · It is a 300B pushpull amp with a tube rectifier and some particular solution on input schematic and output trafo. The Sun-based amps are shown with a 0. Web the sun audio 2a3 or 300b schematic from the 1980s is fundamentally for driving very efficient speakers, classically the western electric 755a, altec or tannoy 15. It does not show the 12AX7 you mentioned. Y. You are not going to get a usable SE-OTL using 2A3s or 300Bs with only one output tube and multiple tubes will be a significant cost factor. Sun audio sv 2a3 kit mono pair photo #23608762a3 and 45 single ended amplifier Sun audio sv-2a3（2019モデル） 組み立て完了 : salaryman c32a3 maniac: how to pimp your sun audio uchida. Apr 1, 2020 · Hello fellow DYI audio members, This amplifier is one born out of social distancing boredom. This one seemed like the most common type of 300B single ended amplifiers, and many other same type amplifiers’ schematics looked Oct 29, 2010 · Not the worst idea; I have considered going with a power drive type of circuit, though I would probably remove the IT and go direct to the 300b grid. (You can substitute tube for technology to make this statement general. I decided to go with this schematic. Tubes. Jan 26, 2024 · Check out the Denon Audio Technical CD (C-39-7147-EX): Zoom in on the 100Hz square wave of the Denon Audio Test CD; "ring" at 22. Perfect gain and phase balance up to 100 kHz; quite amazing, really. Sep 18, 2018 · My suggestion of using the IT is not for class A2 but for the Sun Audio style circuit which also uses cathode bias for the 300B. 2) However you want to get 5V on the heaters. Check Details. Just as the SV-2A3, this is a magical good tube amplifier. Loesch) monoblocks. 3- regarding the driver for 300b I repeat that the Audio Note kit 1 diagram ( cathode bias) is one of the best possible and easy to build; the Miller cap of 300B is not a problem because the 5687 in srpp has around 300 ohm of Zout with a large swing and a reasonable distortion, same for 7044 , with 6463 is not so fine; very Jul 9, 2021 · At one time I had a Gordan Rankin Wavelength Audio tube rectified Para Feed 300B amp and found the little amp to have good top to bottom sound but was also more sterile solid state sounding than the thremonic glow warmth from within I like of tubes. Sep 28, 2023 · Hi folks, Following my first 300B monoblocks built in 2021, I'd like to share my latest 300B monoblocks built in 2023. Apr 16, 2015 · WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. Current (new) production 300B tubes like the Electro-Harmonix 300B and the JJ 300B sound wonderful at a fraction of the Western Electric 300B price. In fact, it sounded straightforward and very direct. Here the circuit I thank for yours commentaries and suggestions, thanks SUN AUDIO OF JAPAN . Before powering the device up We are thrilled to announce that Ojas is now the exclusive North America distributor of Sun Audio. refaudiohk@gmail. The Audio Mirror amps have better low-end punch, but I can live with the more soft presentation of the 300B. Her mod puts it near 400 which is the modern day common use. What I have put into the schematic is from the MA-300B picture and not what was in this amp. I must admit that I was pre-disposed to like them. Sun audio sv-2a3 stereo amp300b srpp amp Sun audio sv-300be 300b amplifier for saleSymmetric reichert 300b push-pull. Stamou Tasos outlines the design and construction of a 300B single-ended triode (SET) tube amplifier following a single-ended (SE) tube amplifier schematic by J. this website in hong kong had 300B course & use my products. Sep 14, 2022 · A hard-wired is used for all of the circuit. 1/2 6sn7gt input sw ac fuse lov spt150b 1/2 6sn7gt 350v/47gf 51j4g mov 300b sot525 g:16n r:3. Mar 21, 2019 · It is not a signal “coupling cap” **). List of 2a3 se circuit designs?2a3 audio sv sun Sun audio sv-2a3 amplifierAudio sun 2a3 amp sv stereo wordpress. Oct 1, 2007 · Hi folks. The schematic's annotation is not very precise to say the least, it shows a 100uf resistor, capacitors without values and without voltages, etc. They are in the circuit and unless bypassed might as well be used. 00 SUN AUDIO 300B MARK II SUN Nov 5, 2023 · It is a classic 300b+6SN7 circuit, but there is a mistake in the middle tube, it shows a triode-strapped tetrode, while in reality is just a triode, half of the 6SN7. 00 TUBE SET OPTIONS 300B: COSSOR/LINLAI Black Plate $225 COSSOR/LINLAI WE300B $550 WESTERN ELECTRIC 300B $1475 Driver tubes Jan 3, 2024 · Sun audio 300b schematic. 5U ----> available NOW. You could build a stereo amp. J. The mods she made might offer a significant improvement, even if it's not the same circuit as the Sun / JC Morrison. SUN AUDIO SCHEMATIC. Cabling. Clearly, it can’t drive effectively the 300B grid directly, so best to couple it to the SF and let the SF to do the current drive job for him. Amp Design. Schematics and circuit explanations can be found on his website. 25V signal while the Mar 3, 2011 · Using 1 300B end tube might be a bit low in power to drive them, I looked at 300B schematics in Parallel SE configuration, but given the price of 2 JJ 300B's for instance, I would prefer to use the Emission Labs 300BXLS in a single SE configuration. As you can see, they have designed the phasesplitter/driver a little different, because they make use of the negative supply from the 300B bias circuit to make a small negative grid bias and a higher negative voltage return for the common cathode resistor in the long tailed pair. My recollection is that this was for balancing hum when using 5 volts AC. IMHO that direct coupled 6SN7 setup is a really bad way to drive a 300B. jpg Sun audio amps sv 2a3 , audio, other audio equipment on carousell. Using a buffer to drive the 300B would work much better, as suggested in some of the previous posts (for example post 6 and 11). For the moment I have a SE PCL 86 amplifier with 4watts, which is actually enough for my speakers, but I hope to achieve 2x8watts with the 300b's. The use of Sin Jun 12, 2024 · I first build my 300B amp using that sun audio/JC Morrison schematic that's all over the web and it just didn't perform well. Loftin and White wrote of an amplifier design, with a direct-coupled circuit. Sun Audio / Uchida Triodenverstärker - Analog Tube Audio - finest quality handcrafted in Germany Feinste Trioden-Verstärker von Uchida (Sun Audio – Japan) Zu Beginn möchten wir kurz erwähnen, dass wir keine Bausätze und Verstärker von Sun Audio, Japan verkaufen. Audio sun 2a3 stereo amp sv posts 2a3 amp px4 driver se tube audio sun circuit tipo diyaudio rogers progetti tiscali web 2a3 single ended amplifier schematic circuit tango diagram Sep 6, 2014 · It is not necessary to use Western Electric 300B vacuum tubes. White in the American magazine Radio News. com 1-613-822-7188 Sep 2, 2023 · Tube/valve amplifiers use potentially lethal high voltages. (As a newbie I'd need clear schematics). My speakers are very high sensitivity, so 2-3 watts for the 2A3 and 8-10 watts for the 300B is not a deciding factor. Attached is the schematic + power supply using a single transformer setup as a dual rail with regulated DC heaters for the 300B and 50V DC offset on the 6SN7 heaters. Sv 2a3 audio 2a3 audio sun sv amplifier used 2a3 single ended amplifier circuit audio naoki watanabe kind same using but tango. Please take a look at the SE 300B schematic for a description of Mr. 05kHz. They are drive either Altec or Mark Audio speakers. Jul 12, 2019 · I don't think the way the 6SN7 is used in this circuit is a competent driver for the 300B. Stamou has built this amplifier with Lundahl LL1623 audio output transformers. Jun 22, 2024 · In the schematic , the connection to bais 1 and 2 was not designated correctly. Open the URLs, which are collected below, and you will find all the info you are interested in. Building, troubleshooting and testing of these amplifiers should only be performed by someone who is thoroughly familiar with the safety precautions around high voltages. We have collected the most relevant information on Sun Audio 300b Schematic. The main amplifier circuit is below: 300B SE Amp – main schematic. Sep 26, 1995 · A "soft start" circuit powers the 300B output tubes' filaments first, then the high-voltage plate supply 60 seconds later. 11 (2) HID-(H of Radio Hm. Both have been widely circulated on the web, so Jul 20, 2024 · I discovered the circuit for my 300B triode amplifier on a website, which is the 300B Single-Ended (SE) tube amplifier schematic with direct coupled 6SN7 input stage that I chose to use. Jan 26, 2024 · Alashikata, Amazing. More important, I've talking to Victor Kung (VKMusic - the Sun Valley importer for NA) about sourcing the Sun Valley amp with 300b tubes rather than the currently offered 845/211 tub Sep 3, 2022 · You can’t beat Sun 300B for the money. Nov 6, 2023 · Sun audio 300b schematic. 5k br:2. You would be hard pressed to find a list of the top SET amplifiers at any time that doesn’t include Sun Audio. 5V+2. Posted by lakerfan (A) on September 29, 2002 at 15:52:27 . Web The Sun Audio 2A3 Or 300B Schematic From The 1980S Is Fundamentally For Driving Very Efficient Speakers, Classically The Western Electric 755A, Altec Or Tannoy 15. Link: OddWatt Audio 5751 SRPP / KT88 Push-Pull Monoblock Tube Amplifier Kits And jazbo8's schematic shows there are 2 (two) coupling caps in the original 300B push pull amp. Aug 14, 2023 · Sun audio sv-2a3 stereo ampSun audio schematic Otomon laboratory (音門ラボ) / sun audio we91b type 300b se stereo tubeSun audio of japan. I used Tango NC-14 interstage and FX40-5 output transformers, which I've had around for a while. That, I believe, is due to inadequate grid drive. The chassis is clad in an understated shade of grey, with a gold-hued front panel which houses nothing more than two volume control knobs for left and right channels respectively and a flick on-off power switch. You get the following: When played back on the old Analog Filter CD players, there was an exponentially decaying "ring" After the rise, and an exponentially decaying"ring" After the fall. I am currently looking at getting a set of Mesh/Perforated Chines tubes. newbie like more different brand tubes to exchange. They are a good, solid 8 watts. Oct 29, 2010 · In the schematic you posted, the 300B runs at 417 V, 75 mA. Web introduction the targets of this project are the following: Not inexpensive, however this amp sounds excellent. The 6SN7 is very good tube sound but my next project is with pentodes drive the 300B. I think he has begun to post in DIY Audio so probably could be reached here with questions about his With 450v across the 300b, i bet it is not a 2. Phần đầu tác giả thiết kế cho 2A3 nhưng sau các diyer sửa thành 300B chứ nó không phải mạch của 300B. 5 mV: Power Supply Aug 22, 2023 · Web best 300b amp schematics. You guys, it would seem, do not. Nov 23, 2023 · Sun audio sv-2a3 amplifier. Of course, the Tamura iron, the Output Transformers & PSU choke, would be of high quality, excellent possibly & with single-ended transformers, achieving wide bandwidth together Feb 20, 2024 · I'm contemplating building either of these amps from a kit. ) Sep 7, 2023 · Sun-Audio-SV-2A3. A. 3VAC is rectified and regulated and connected to the 300B tube through a 10 ohm resistor. *1. Audio sun triode 300b 2a3 amp uchida sv mit japan tube bte und vt handcrafted analog finest germany quality Feb 2, 2018 · I used all Lundahl iron except for filament transformers. Bottlehead Stereomour II 2A3 or Kaiju 300B, or the Elekit TU-8600S 300B amp. (các bạn có thể tham khảo Google với từ khóa: Sun-Audio 2A3 hoặc Sun-Audio 300B. com 影音俱樂部 Nov 28, 2015 · The Rozenblit 300B SE-OTL schematic is available for the price of his 'Tubes and Circuits' book. - I asked Victor about removing the negative feedback on Sun Valley and he did not give a clear answer. Audio sun 2a3 amp sv stereo wordpressSun audio sv-2a3 stereo amp 300b svSun schematic meta gizmo. Jul 9, 2023 · 300b single ended amplifier ordinary circuit Otomon laboratory (音門ラボ) / sun audio we91b type 300b se stereo tube Sun audio schematic Se 300b audio sun tube amplifier otomon tamura stereo transformers type manufacturer same laboratory soundgate Jan 4, 2021 · I've read that some Chinese amps use the same Sun Audio schematic. It sounded nice and the output transformers looked good on the scope too! I hope they are still using Tamura OEM OPTs. 300B PUSH/PULL SCHEMATIC. Features Highlights:-5. The only plus of this general design is that it is cheap to realise and extensively documented. My 300B amp can run the TQWT and DTQWT to ear-splitting levels without serious distortion - something the MAE1 amp couldn't (only TQWT tried). Simply the IT replaces the 27K anode resistor and then just tweaking some values to optimise the operative conditions. 2) 120V version. The single-ended 300B tube amplifier circuit will deliver about 8 Watts and is well suited for use with high sensitivity speakers. Bias 1 with the 1KOhm series resistor only goes to the common cathode resistors and bias 2 with the 350 Ohm series resistor goes to 300b grids and to the network connected to 12bh7 grids. Nov 5, 2023 · I figured in China they call this 6SN7/300B arrangement, the J configuration. Audio Note AN-Vx silver interconnect Audio Note AN-Vz silver interconnect Oct 9, 2023 · Sun audio sv-2a3 schematicSun audio sv-300be l anniversary limited edition 300b integrated tube Sun audio of japanAudio amp tube 300b sun integrated limited edition anniversary sv. Nov 17, 2017 · The circuit diagram and colorful wiring diagrams are uploaded in our new site. Dec 10, 2007 · There have been lots of reports going around that 300B's have given disappointing results. SUN AUDIO SV-2A3 stereo amp | D a r k L a n t e r nnz hi-fi audio. May 2, 2021 · Sunvalley SV-S1616D [300B] point to point 300B amp + Hashimoto H-20-3. Sep 11, 2017 - Stamou Tasos outlines the design and construction of a 300B single-ended triode (SET) tube amplifier following a single-ended (SE) tube amplifier schematic by J. 300b amplifier 2a3 ordinaryAudio 2a3 sun amplifier tube mart Sun audio sv-2a3 stereo ampSunn 190b schematic schematics click browser left open Jul 28, 2023 · Circuit audio note 300b amp conquest power amplifier diagram build list partSunn 2000s schematics 300b se8Otomon laboratory (音門ラボ) / sun audio we91b type 300b se stereo tube. For example one could have about 440V, where some volts are lost in heat, 350V are for anode voltage and about 75V cathode bias for 60 mA current. Jun 7, 2017 · The Wright WPA 3. HelloI would like to do a simple mod on my Sun Audio 300B stereo amp ,but have misplaced the kit instructions and schematic. Nov 17, 2021 · That Sun Audio/"JC Morrison" design has so many problems. It can be Any 300B running like this. So the SunAudio SV300B MKII amps arrive a couple of months ago. This is, as yet, an unknown territory and it needs to be explored more. It is of lesser importance here and will be discussed in a full fledge DIY 300B vacuum tube amplifier page. T. 悅聲音響 reference audio Search for: 九龍西洋菜街 14-24號榮華大樓電梯 4字 20A室 電話:25235828,25235787,24509888 www. And inadequate grid drive is what you're gonna get if you connect that 300B to a 6SL7. I guess the oversized trafos of the 300B amp plays a role here. I think I keep the circuit as is except of 300B DC heater arrangement. iyqwzej ihswyxl hrwrar gvjp qnilgu varevh eqkhgst fmgoij lkmuh rkhe