2a3 tube datasheet amplifier. Mar 19, 2018 · I was not clear enough.

2a3 tube datasheet amplifier I am generally tube / SS agnostic. OPT: 2. The rectifier tube will take a while to get here, but, most likely, I have a dud on my hands. . Dec 29, 2020 · PSVANE Horizon Series 2A3-AT Vacuum Tube Amplifier Matched Pair (2 PACK) Visit the PSVANE Store. Lyrita‘s 2A3 amps are single-ended designs, as originally intended for this tube. 3-1/2 watts per channel. F. The stereo amplifier kit without tubes is available from my favorite tube supplier, TubeDepot for $1,495. Today 2A3 is often found in the output stage of single-ended audio amplifiers. You’ll need a pair of 12AU7s or 12BH7A dual triodes ($26-$500) and a pair of either 2A3 ($100) or 300B triodes ($240-$19,995). SET-single ended triode. I Replaced a few capacitors and it sounds very Driver of power triodes such as 300 B, 2A3, Output stage headphone amplifiers, preamplifiers, power stage little P-P triode amplifiers (10W-4xECC99) and parallel voltage power supplies. Debut 2022. "If you are not intended to the convertible (2a3), just swap this constant currency sink to 1. Oct 23, 2024 · - design around JJ 2A3 40, I would be OK if the operating points exclude options for NOS tubes (for anyone else familiar, the "40" suffix is a modern production 2a3 with higher dissipation) - AC filament supply - mono blocks - undecided regarding power supply. Starting with a Ken-Rad tube likely from the 1940’s, an early 2000’s Sovtek Reflektor 2A3 (which is sonically the best of the lot here in my experience), Sophia’s mesh plate globe, JJ’s massive 2A3-40 and a Belgian 6B4G tube, which is actually just a 2A3 with a different base. The 2A3 vacuum tube is a directly-heated triode power amplifier tube. It’s a SET amplifier with zero negative feedback. This version uses one of our favourite - the so called “super triode” preamp tube, the 6H30. BUT maybe is the solution choke load? In a well designed amp, the 2A3 brings music alive. German solder used in pin connection, ensuring stability and reliability. The grid is gold-plated, offering an extremely high maximum screen dissipation. $147. Mar 15, 2023 · Rload=36K-39K cca. " Our stock of NOS JAN-CRC RCA 2A3 power tubes were made These are the earliest of the 2A3 production and the most sought after 2A3 tubes ever made. One important detail is the hum inherent with AC heating operation of direct heated tubes: the hum level is proportional to the heater voltage, and the gain of the tube. 1%, we have to remember something that is not in any 2A3 data sheet: 2A3-40. Mar 19, 2018 · I was not clear enough. Weight. The plate can do 28Watt, but to get this, you need to modify the amplifier. Y. I have a Monolith SX-11 5K transformer (pair) that I hope to use. Though this is rare, it is not a tube issue when it happens. Feb 15, 2017 · The 2A3 vacuum tube is a power triode capable of outputting 3. Typical operation class AB1, transfer characteristics. The entire gold-plated vacuum tube grid is permanently embedded atop a ceramic base. Jul 12, 2020 · Great. Two RCA line-level. The gain […] Oct 27, 2012 · I have a new rectifier tube on order in case that may be the problem, but I have low hopes. The 2A3S Hommage is perfected with two versions of the luxurious-sounding Hashimoto (Sansui) output and choke One of the most popular new old stock 2A3 types ever made. The dual 2A3 EH Vacuum Tube from Electro Harmonix sports a gold-plated lattice and encased inside a solid glass housing. Maximum plate curent of everage tube for fixed bias ia = 70 mA Maximum plate curent for manually adjusted grid bias or self-biasing ia = 100 mA Moderate power, filamentary triodes for Class A service. This amplifier will be the first tube amplifier in the USA with the first order. The tube I used here for my project are the double plate NOS 6B4G but it has the same electrical characteristics except for the filament that uses 6. Elekit TU-8600S 300B Tube Amplifier Kit - Lundahl Version; Elekit TU-8850SE Stereo Tube Amplifier Kit; Elekit TU-8900 300B/2A3 Tube Amplifier Kit; Elekit TU-H82 Hybrid Tube Amp Kit; Model 16LM Mono Integrated Tube Amplifier; Model 8LM Mono Integrated Tube Amplifier; Model 8LS Stereo Integrated Tube Amplifier; Model PL Stereo Tube Preamplifier Aug 29, 2012 · The Simple45 that Bigun linked to is the precursor to the TubelabSE, which makes a nice 45 based amp with mosfet followers. These amplifiers have twice the power over my famous 45 tube amplifiers. These 2 tubes, Mar 25, 2018 · Hust extended class A amplifier I just discovered tonight that I have had this very amplifier for several years. Dec 1, 2024 · I'm thinking about building a switchable 45/2a3 amp with a 10Y driver to keep it all DHT. 5-3k. circuit! The H. The Elekit TU-8900 300B/2A3 DIY Tube Amp Kit offers total flexibility for the serious audiophile who loves the magical sound of a great single-ended tube amp, with 300B or 2A3 tubes. Playing the amp, the sound was a little thin, so I decided to tweak a bit. It's detail is even better than the 300B which we thought was impossible Jan 4, 2013 · Here's Walsh's original PP 2A3 from the 1940s, note that he uses feedback here too. Ned has a large selection of data sheets that he will send you for a nominal fee. Dec 8, 2008 · Loftin-White 2A3 Single-Ended Triode Tube Amplifier Schematic. A roundup of 2A3 tubes. It has Auricaps Bypass coupling capacitors and comes with NOS tubes. Paramour evolved into the Stereomour stereo amp and now, fifteen years after the Paramour first arrived, we are proud to introduce the latest evolutionary step of one The new 45M-FFX “Supertriode”. 2A3. So I dunno. I used 6E6P as driver stage. Power. Elekit TU-8600S 300B Tube Amplifier Kit - Lundahl Version; Elekit TU-8850SE Stereo Tube Amplifier Kit; Elekit TU-8900 300B/2A3 Tube Amplifier Kit; Elekit TU-H82 Hybrid Tube Amp Kit; Model 16LM Mono Integrated Tube Amplifier; Model 8LM Mono Integrated Tube Amplifier; Model 8LS Stereo Integrated Tube Amplifier; Model PL Stereo Tube Preamplifier May 30, 2015 · The usual place to start when designing a valve amplifier is the output valve, in this case a 2A3. Sound even more detailed than 300B, with great tone separation. BUT Vbattery is higher about 300V. datasheet 2A3 (page 1) datasheet 2A3 (page 2) datasheet 2A3 (page 3) datasheet 2A3 (page 4) Let’s DIY 2A3 amplifier! It is really hard to go wrong with 2A3 tube unless one really messed up the design. Tube enthusiasts love 2A3 power tubes for speed, articulation, detail, incredible tonal range and timbre accuracy. The military spec JAN-CRC RCA 2A3 vacuum tube is available now but limited. The 2A3 is best with 2. 5 Dec 17, 2018 · Do be aware that dual purpose 2A3/45 amplifiers will not be ideal since the two tubes require different output impedances . Feb 7, 2014 · The mentioned amp was a classic 3. TRiode max 63 max 46 max 150,0,0,0 ,0 Base: 4-PIN CERAMIC BASE Uf = 2,5 V if = 2,5 A Typical Characteristics: Ua = 250 V Ug = -45 V ia = 60 mA S = 5,25 mA/V µ = 4,2 Ri = 800 Ω Limiting Values: Ua = 450 V Wa = 40 W Maximum plate curent of everage tube for fixed bias ia = 70 mA Maximum plate curent for manually A. Assuming we have some reasonably efficient speakers a 2A3 makes a lot of sense. Returnable until Jan 31, 2025 . In this project, the 2A3 power tube runs at a 60-mA plate current with no signal applied and has a 410-V plate voltage. Have fun !! If easy to do, PM me a schematic of your 1990's DC 2A3 May 14, 2014 · Unfortunately the 76 is a 5-pin but that may not matter. 5V heater). Bottlehead Stereomour II 2A3 or Kaiju 300B, or the Elekit TU-8600S 300B amp. 2A3 Author: RCA Subject: JA-FP-2002-06-08 Created Date: 6/8/2002 12:48:50 PM 2A3, 300B as well as SV811 and SV572 are directly heated triode (DHT) tubes. Prized possessions, a pair January 2014 World Premiere! Triode Lab 2A3-S Vacuum Tube Power Amplifier Triode Lab is the little company that can. 2A3 Bohemia SET Nov 2020 the Best pure class a tube amplifiers in the world | Highest quality components combined with the latest inovatiive technology . 0 the input stage tube is the Golden Dragon 6SL7. Very simple and elegant little triode amplifier. If you start off with really good 101 dB speakers, you give yourself the possibility to achieve the highest possible level of in-home audio performance. 2K , suitable for use as driver stage. Yet, for higher power applications, this tube can be used as well. But note that doesn't necessarily translate to a **resistor** value ratio. This results in some pretty unorthodox operating points, with about 15Vak/0. T. By looking at the datasheet we can see whether it's likely to be suitable for our system, or what we might need in our system to make it "work". 99 $ 147. Example: If we get too picky about loosing 0. Anode (Plate The Electro Harmonix 2A3 EH Vacuum Tube’s design takes inspiration from the classic RCA 2A3 tube dating back to the 1930s. I got it on the bench about a week ago, thinking the whole time I've owned it that it was a (BIG) standard Williamson. 5W 2A3 class amp (with good quality black anode 6B4G tubes) and represents a valid statement to compare the performance of the RH2A3 with. Warning: Substitutes are given as a guide only - please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. There is not a lot there to muck up the sound. There are only a certain number of 6C4Cs left in the world Tubes, tubes, tubes! Find everything from the field of tubes: premium selected TAD tubes, TAD blackplate tubes, our beloved tubesets for nearly every amplifier out there, more brands and accessories. Sitting directly behind the tubes are four transformers, which is the norm for tube amplifiers. Jul 17, 2022 · So, I started with a typical operating voltage for the 2A3 (250Vak), using a B+ of 295V. Specification Sophia Electric blue glass 2A3 The much more anticipated Sophia Electric brand-new production of 2A3 is here. Simple 2A3 SET integrated amp - three stage, capacitor coupled, small chassis. Transconductance and plate resistance curves. E. Title: 2A3 Author: Tung-Sol Subject: JA-FP-2005-10-29 Created Date: 10/29/2005 11:51:40 AM Jun 13, 2024 · The EML2A3-S is a plug & play, direct replacement for original the RCA 2A3 tube. Mar 30, 2015 · The 211 tube requires 10. 16" deep x 11" wide x 8" high. I opened up the amp and, as a lay observer, everything looks brand new: no loose connections as far as I can see, nor obvious swollen capacitors etc. H. Aug 11, 2022 · An experiment used a 2A3 single ended amplifier that had a moderate amount of 2nd harmonic distortion. Get a par of 31 - cheap enough - and use them as drivers. This is identical to It has been an absolute delight listening to this amp. EL34 Integrated / Power Stereo Amp* EL34 Power Stereo Amp* EL34 Monoblocks – the Artiste (Pair)* 3 - EL84 Amplifiers. Moderate power, filamentary triodes for Class A service. The 2A3 is an audio power triode that is still used in amplifier designs. It is a complete joke! If you have the $$$, the best is: Audio Note "Japan" 2A3 SET amp JC Verdier 2A3 SET amp and similar 2A3 SET amp from L'audiophile And remember always use NOS 2A3 tubes, please don't use any modern 2A3 Aug 18, 2011 · 2A3 Single-Ended Loftin-White/Shunt Regulated Driver. back to tube data menu 31 March 1997 Jan 19, 2019 · I received a request from a friend who want a 2A3 SE amplifier. My single ended pure class A amplifiers are perfect for any audiophile looking for a unique listening experience. Aug 7, 2016 · The 6SJ7 data sheet shows a 3:1 ratio for Ip vs Ig2. 5W. This beast is TRANSPARENT! Another point: this amp is designed around the JJ 2A3-40 which is another super tube. Otherwise we recommend the EML solid plate tubes. As reported, the mono plate 2A3 are incredibly good sounding tubes; air, space and presence all go through the roof! These are in a completely different league from any other 2A3 tube I have heard so far. datasheet 2A3 (page 1) datasheet 2A3 (page 2) datasheet 2A3 (page 3) datasheet 2A3 (page 4) The tube diode rectifier GZ34 should be the Mullard version. 1 Watt and increasing distortion by 0. This very simple and elegant little triode amplifier is the Loftin-White Single-Ended 2A3 Tube Amplifier. Two 6C6 pre-amp tubes, Two 2A3 power tubes, 5R4 Rectifier. Output: 3. Menu. Compared to the 2A3, I’ve spent a lot more time living with the 45 and the 300B, the type 10 and the 71a. Kit1-15 300B Integrated Amplifier; Interstage Monoblock 300B* Mentor SET 300B/2a3 Power* Mentor Monoblock 300B* 2 - EL34 Amplifiers. Modern manufacture reproduces this directly heated design. The tube complement is mounted towards the front of the amplifier, comprising two 2A3 tubes as power output tubes, with two 6SN7GTs and one 5U4G tubes beside them. FEATURES Dec 31, 2024 · TU-8900 is a latest addition to the Elekit portfolio. Or B+ must be 5X the peak swing needed. L1 EL84 V2 Integrated* L4 EL84 Integrated C core; EL84 prOTOtype Phono* Virtuoso Headphone; 4 May 9, 2023 · The triode curves are guite similar to 2A3 curves but with slightly lower Rp and higher gm if I remember correctly. This may be a bit high impedance for the 2a3, but my speakers are closer to 6 ohm impedance so reflected load will be a bit lower. Loftin and S. The direct-coupled (no coupling capacitors) two stage circuit was designed as a laboratory amplifier in the 1930's but the team of Loftin and White. There's supposed to be 45V across R5, which is the grid leak resistor for the 2A3 and plate load resistor for the 6SF5. All it does it tell you how much current to plug into your calculation to select the resistor value that will give you the desired voltage drop to set your Vg2 per the desired operating point. I first designed the stage very much in line with the typical 2a3 operating point: 250V on the plate, 750 ohm cathode resistor, and aimed for 60ma of current. For additional lowering the Vb, tube has to be set at the lower Va, which is not good - tube is the voltage device. Matched pairs, quads, and octets are available My single ended pure class A amplifiers are perfect for any audiophile looking for a unique listening experience. Apr 7, 2018 · The Truth™ 2A3 amplifier completely sidesteps both problems by biasing the core of the output transformer with a DC current, and keeping all tubes in in the most linear Class A region. 5k ohm to 3k ohm load and the 45 needs 5k ohm for the best power to distortion relationship. These are 2400x4200 resolution (2 color) and average about 200k. It will bias exactly at the original operating point. Overhang filament structure on ACME 2A3 model to achieve very airy and high-resolution sound reproduction. Aug 2, 2023 · Definitely a 2a3 guy here I love the crystal clear transparency that tube brings. Prized possessions, a pair Catalog Datasheet MFG & Type Document Tags PDF; 2A3 power Triode. This tube amplifier DIY kit is a successor of very popular TU-8600 model which, except of perfect sound quality, brings you more interesting features. The 2A3 tube is a basically a pair of 45 tubes In the same glass envelope, so you have 3 watts instead of the 1. On thumbs, I figure a healthy voltage-amplifier tube can make a peak swing of about 20% of the supply voltage. datasheet 6SL7 (page 1 - gif format) datasheet 6SL7 (page 2 - gif format) datasheet 6SL7 (page 3 - gif format) The output stage tube is the Golden Dragon 2A3. The 2A3 was also made with single plates, the so called mono plate 2A3 which is regarded as the best sounding 2A3 by many. What I would do is what I've done with great success - use it as an input tube in an all-DHT amp. So now you have an amp with only two stages and no coupling caps. It is a good audio tube and there are plenty of schematics around the net. As usual lets start with a look at the 2A3. Where 2A3-Mesh is not advised: Mesh tubes used as output tubes in a separate pre amplifier, or used in a head phone amplifier, may occasionally cause a spurious noise. High evacuated tube, it achieve high performance tube in audio frequency. Abstract: 2a3 tube tube 2a3 TRIODE 2a3 rage Text: 2A3 - 40 - NEW 2A3 - 40 W A. A 6-pin driver choice might be a triode-strapped 6C6 (ala the old Radiotron 2A3 circuit). I have used the Elekit 300B and 2A3 amps before, the 45 from American Tube Amp easily bests the 2A3 for transparency and the 300B for punch and heft (surprisingly, the 2 W output from the 45 amp is louder than the 8 W Elekit 300B, I think because of the lack of negative feedback. TRIODE 2A3 is a power triode with a directly heated cathode and power of 40 W, mostly for Hi-Fi application. We have 25 copies of this limited edition finished in the Triode Lab Classic Hammertone that mimics tube amps from the golden age of mono-amps. Plate characteristics. The above table shows three working points from the 1930's Western Electric 300B data sheet. but I was finally able to send it in late October 2021. It is a 2A3 single amplifier that he loves very much. In 2000 we introduced the original Paramour 2A3 amp, an amp whose cost to performance ratio upset the natural order of Single Ended Triode amp manufacturing. 5 The AV 2A3 SL is a direct replacement for the RCA 2A3 monoplate tube. I've heard 300Bs sounding great and heard them sounding slow and boring it's really amp/speaker dependent like all things. I do love the 45 tube it sort of combines the best qualities of the 2a3 and 300B but as stated above such low power. For detailed technical information please see the RCA data sheet. Some DIY don't like the sound of the GZ34 because consider this to much hard near solid state diodes but this is not true because depend by the power supply design. A double pole, double throw switch was wired from the amplifier output to a Spica TC-50 speaker to allow phase reversal of the signal to the speaker. TRIODE Base: 4-PIN CERAMIC BASE Uf If = 2,5 V = 2,5 A Dimension and connections: Moderate power, filamentary triodes for Class A service. 99. The vacuum tubes that can be used are 71A and 45,2A3, which are different standards, but 300B can also can be used. Mar 15, 2023 · One 'common thread' of this "The 2A3 Tube Amplifier" thread is the combination of output power and distortion. (from TFK datasheet PDF). One or more extra switches, 2. Feb 8, 2010 · I believe we absolutely should build our entire audio system - around a truly superb Directly Coupled two stage tube amp . 67k ohms resistor? This is my first tube amplifier. Nov 16, 2024 · This amp was built by Perry himself over at Analog Ethos. With special design, it is possible to design an amplifier that can use either 2A3 or 300B tubes. Without modifications, you just plug in this tube into any normal 2A3 amplifier, and tube and amplifuer will work at the normal 2A3 operating point. ABOUT : The 2A3S Hommage was designed to celebrate the 10th anniversary of our 2A3 Classic (MK2), as well as pay tribute to the original MK1. Notice that the driver tube is a big triode like the 2A3, the 6A5G, which is a 2A3 with a 6. Currently in production by Electro-Harmonics, Sovtek, and Shuguang. Dec 29, 2009 · The 01a is not a power tube - no way. I’ve had a few push pull triode amps in the past based around all of the big characters; the 45, 2A3, 300B and 6B4G, and the Tube Fantasy 2A3 monos hold their own fidelity-wise with any of them. I guess it demonstrates the inherently good sound of a simple 2A3 S. I have this idea to put a banana socket next to each output tube in my upcoming 6C4C PP amp to make it easily rewired for other tubes such as 6P31S, 6P21S, 6L6 and others. It offers power tubes rolling (300B / 2A3), possibility to use 12BH7A instead of 12AU7 (ECC82), selectable headphone impedance / volume level, possibility to switch to non NFB circuit and new Purchase Shuguang 2A3C vacuum power tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. Once on the bench I discovered the unusual output tube connection. RCA introduced 2A3 in 1932 as a low-frequency amplifier tube. My speakers are very high sensitivity, so 2-3 watts for the 2A3 and 8-10 watts for the 300B is not The 2A3 is a tube that I’ve only recently come to appreciate, having owned a few now in the past 2 years after previously never having had one in almost 20 years of tube audio. The 2A3 tube offers those wonderful, sweet SET mids and highs while not ignoring the bass. The direct-coupled (no coupling capacitors) two stage circuit was designed as a laboratory amplifier in 1929 by the team of E. 2A3-40 A. The output power of single tube can reach 6. A 100 Hz sine wave from a very low distortion oscillator was applied to the 2A3 amplifier input. make ground breaking sound Feb 20, 2024 · I'm contemplating building either of these amps from a kit. It also has quality capacitors and resistors by Nichicon, Rubycon and Vishay inside the amp. It's not really a driver tube either, and note it's max Vp of 135v. WOW. Elekit TU-8600S 300B Tube Amplifier Kit - Lundahl Version; Elekit TU-8850SE Stereo Tube Amplifier Kit; Elekit TU-8900 300B/2A3 Tube Amplifier Kit; Elekit TU-H82 Hybrid Tube Amp Kit; Model 16LM Mono Integrated Tube Amplifier; Model 8LM Mono Integrated Tube Amplifier; Model 8LS Stereo Integrated Tube Amplifier; Model PL Stereo Tube Preamplifier Hi all. It has more plate dissipation power than a typical RCA 2A3 kind of 2A3 tube (like Sophia Electric’s mesh plate 2A3 tube), which means you may have a little more power and dynamics in sound if your Oct 7, 2024 · Host: So the vacuum tube amp has a somewhat higher output impedance. Tube Data Sheet Locator. What is that ? where will be connected that 1. The TU8900 amp's unique circuit automatically detects the triode tube installed, without any bias adjustment or settings changed by the user. The sound performance of PSVANE 2A3-TII is amazing. One can learn a great deal from this schematic. The 6A5G can be run off of AC with no hum. This tube is an absolute wonder. 3V instead of 2. Well executed and compact, the amps are even tube rectified with the 5AR4. 22 lbs. F. Note that the tube is already working with say mid or lower Va of 150V. Elekit TU-8600S 300B Tube Amplifier Kit - Lundahl Version; Elekit TU-8850SE Stereo Tube Amplifier Kit; Elekit TU-8900 300B/2A3 Tube Amplifier Kit; Elekit TU-H82 Hybrid Tube Amp Kit; Model 16LM Mono Integrated Tube Amplifier; Model 8LM Mono Integrated Tube Amplifier; Model 8LS Stereo Integrated Tube Amplifier; Model PL Stereo Tube Preamplifier Jun 13, 2024 · The tube base is now glued on the glass with anti-vibration rubber. The manufacturing process is unique and all the tubes are factory tested and matched pair. 5% THD. mtr22n's friend's amp should Not be used for tube swapping of 2A3 and 300B. General mechanical data. Audio Asylum - SET Asylum: REVIEW: Sun Audio 2A3 Amplifier (Tube) by shufumei - Single Ended Triodes (SETs), the ultimate tube lovers dream. It is direct heating cathode and low power consumption. Dec 18, 2020 · Vintage style globe shape glass enclosure on tube amplifier of ACME 2A3 model. The last working point shows 250V, 60mA, -45V bias. We need 225V of supply. power supply uses an Ohmite Gold resistor in front of the 70uF Obligatto film/oil input capacitor. 5mA across the 6SF5 and the 2A3 operating at just 5mA. Egoista 2A3 continues Viva's state-of-the-art amplifier design traditions, offering a blend of incredible sonic characteristics built on a smaller chassis. May 9, 2002 · *Cary designed a 300B amp that give out 15 watts/channel. This is a great amp, but I have no room to keep it as I decided to have another amp builder do a custom amp for me. Directly-heated triode tubes like the 300B and 2A3 enjoy an enduring popularity among audiophiles. Before 45 tubes are used, the bias should be turned all the way down (to the left) to minimize idle current through the output stage since the 45 has reduced dissipation ratings compared to the 2A3. ga('ec:addProduct', { 'id': 'NN601B', 'name': 'Shuguang 2A3B / VT95', 'category': 'HiFi Triodes, Transmitting Tubes', 'brand': 'Shuguang', 'variant': '', 'price': '59 . Unfortunately I do not have any mono plate samples in my stock, so only bi plate 2A3s will be shown in this post. When I built my 2A3 amplifiers, I initially used AC on all the filaments and was surprised to find hardly a trace of hum on the output. Tubelab sells the PCB's and if you pick up a power transformer with several secondary taps, you can build/modify the design to run 45's, 2A3's, or 300B's. Description Maintaining a legacy of great sound . 25A AC or DC on the filaments. Vacuum Tube Valley magazine says: "Very balanced, with great upper mid extension. 5W @ 2. Note: Outlets on some of these types could have different set-up. Not a big problem since the 2A3 needs 250V-300V of supply. Home Tube data Schematics Software Search engines 2A3 Data sheet links: Dave Cigna''s Pages (DuncanAmps mirror) 2A3: html: oldradio Up for sale is a pristine condition DARED 2A3 Vacuum Tube Integrated Amplifier. It may or may not need: 1. Radiotron 6C6 driven Single Ended 2A3 Stereo Amp. When I retrofitted the 300Bs, I decided to use regulated DC on the filaments because I did not have a 5V AC filament transformer. Build quality is better than many; these amps are solid little bricks. It's a brilliant preamp or input tube - one of the very best there is. 25V/3. Amp configurations can be customized for the user. The 300B with its rich midrange and extended bass - and 2A3 with its delicate expression and gentle tone - they offer a very special sonic experience. - aiming for great OPTs. Highs are sweet and mids are musical. A Japan guy who build same amp wrote to me that need do this bellow. 67k ohm resister". Bob Carver: Exactly and that higher output impedance is one of the things we hear when we listen to a vacuum tube amplifier. A list of our Tube amplifiers organized and shown by power tube type - 300B, 2A3, PX25, EL34, 6L6, KT88, KT120, KT150, 6C33C, EL84. Search this page . I still have a solid-state class A amp as well and some 45 monoblocks. Classic single-plate 2A3 construction with a modern 40 watt plate dissipation rating. Tubes. Good 300B tubes seem expensive, 2A3 not nearly as spendy. Here’s the 2A3 I build for him. Limiting Values: ua = 400 V ik = 60 mA 2A3. This version is similar to above, but the circuit design, the sound, is completely different. We have called this tube 300B25 ('25' stands for 2. It's one of the things that make a vacuum tube amplifier sound so enjoyable, so nice and so spacious. max 165,0 max 63,0 max 46,0 max 150,0 Capacitances: cg1 = 17 pF ca = 11 pF cg1-a = 7,5 pF Aug 12, 2010 · PSVANE 2A3-TII is a direct-heated cathode power triode which can directly replace with standard 2A3 tube. 2A3 Tubes. They are ideal for use in vintage audio systems and will provide an unparalleled sound quality. The 6E6P are long life military tube which is very linear when connected in triode mode, Rp are around 1. Shuguang Vacuum Tube 2A3 Series Triode: 2A3B (2A3) DESCRIPTION 2A3B is compatible with 2A3. Inputs. Elekit TU-8600S 300B Tube Amplifier Kit - Lundahl Version; Elekit TU-8850SE Stereo Tube Amplifier Kit; Elekit TU-8900 300B/2A3 Tube Amplifier Kit; Elekit TU-H82 Hybrid Tube Amp Kit; Model 16LM Mono Integrated Tube Amplifier; Model 8LM Mono Integrated Tube Amplifier; Model 8LS Stereo Integrated Tube Amplifier; Model PL Stereo Tube Preamplifier Oct 27, 2012 · Input/Driver tube: 6H8Cx2 Output Tube: 2A3C x2 Rectifier Tube: 5Z3P x1 Hi END Outstanding Signal/Noise Ratio:90dB Distortion: less than 1% at full power Sensitivity: 200mv Input Consumption: 200W Weight:18kg Size Dimensions:390 X 320 X 190mm Mar 28, 2021 · I figure (from data sheet) about 45V peak or 90V peak-to-peak. With my weak 2a3, I was only pulling something like 30-40ma, which meant that my bias was also quite low. I don't think the designer understands the 300B tube at all. I want this 45/2a3 single ended amp for 45 tubes use only. The PSVANE 2A3-TII has a very high quality of materials such as smoke glass and china tube base. The circuits are simple, and use transformers extensively. Review By Rick Becker In our last episode of High Efficiency Adventure, the review of the Zu Audio Union loudspeaker, I spoke with delight about the 2A3 Classic Mk2 power amp mated with the very high efficiency Zu speaker. Two triodes can be used in class A and AB amplification. 5 W in a single-ended Class A configuration. Can be used instead of 5687, E182CC, 6840, 6BL7. I've also used a 230uF Clarity cap reservoir for the 2A3, & 100uF Mundorf Tube-cap, along with a Mills 6K2 12W resistor for the 6C45Pi. PLEASE NOTE: Tubes Sold Separately. Order Electro-Harmonix 2A3 EH Gold Grid vacuum power tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. 5V. 3V center tapped filament that serves as a cathode to eliminate hum. datasheet GZ34 Philips Jan 1, 2002 · For the version 2. Dimensions. Or: we want 45V peak. 2A3 Ratings Vh Although this amplifier was designed around the 2A3 output tube in parallel single ended operation, 45 tubes can be used if desired. Buy Sovtek 2A3 vacuum power tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. Dec 11, 2012 · The 6N23P drives the 2A3 from 1 volt input so no preamp is required and MOST IMPORTANT a preamp will degrade the sound. The tube amp is in perfect working and cosmetic 2A3 Author: RCA Subject: FP-1999-02-28 Created Date: 2/24/2002 4:39:30 PM Jun 13, 2024 · So we have put the heater of the 2A3 tube inside a 300B, to get a 300B tube with heater specifications of the 2A3. uaiw fxmzti qcne viyc rrzf tkm pwfzo atsr ysvubg uzbuzbzp