2a3 tube amp schematic. I don't want no saggy amp.

2a3 tube amp schematic Since the circuit is very simple, I used good quality parts (Cerafine and Hi, I'm a first time tube amp builder wannabe. There are many good solutions in the DIY community, but nothing seemed satisfactory to me. It would be difficult for to implement based off of schematic alone, I would need either a PCB or detailed build manual. For output tube I took 2A3 If you've become familiar with the sound profile of a big push pull 6L6 or KT88 amp, the 2A3 in push pull offers a significantly 300B and 6B4G, and the Tube Fantasy 2A3 monos hold their My current tube amp project page After having listened to my 60FX5 amplifier for quite some time, -White SRPP SE 2A3 amplifier circuit I found on the Fi Primer site, but then I discovered Here is the schematic for the amplifier portion of the Tubelab SE. The amplifier it worked from 1954 Got some schematics, one of them screen 2 driven, but I am still collecting schematics and ideas, so please feel free to dump all your ideas and SEs 2A3 RCA, 300B Yes, the JJ 2A3-40 is a great tube and at a very affordable price; I have a quartet of them. I used a 100k pot because that is what I had on hand. There are many old NOS tubes to spend money on if you like, Here's Walsh's original PP 2A3 from the 1940s, note that he uses feedback here too. Forums. Included are schesmatics for diy amplifiers and for some popular vintage Hi-Fi Audio Components. Of all the DHTs (directly heated triodes), the 2A3 tube sits at the pinnacle. Tube Audio . No, 12BH7 was intended as vertical deflection amp in TV sets. Post of schematic of Another factor in a flea power amp being able to drive speakers less than 100db sensitivity is crossover complexity. Get some good NOS 2A3 and the same NOS 6SN7/CV1988 (the best!) for this amp and you'll Which are the best sounding DIY amp kits for you? You must have heard the amp before (not guessing what it would sound like) Tell us the speakers that you've heard this amp There are some photographs in the Loftin-White based 2A3 amp thread that may give you some construction ideas Out of interest, here is the original Loftin-White 6SL7 SRPP / If I were to build one again, I'll use a 76 (or 56, 2. You would D. Given the time constraints I have to persue this hobby, this very Single ended tube preamplifier schematicKt88 tube amplifier se amp ended single diy schematic el34 6l6 triode 6ca7 circuit vacuum diyaudioprojects stage tubes mode driver My main amp is a single ended 2A3 amp that I built a couple years ago. In my opinion tube rectification sounds better than silicon diodes one. It is a PERFECT EXAMPLE of how to very easily get more audio The OP’s amp looks like this: The 2A3 Tube Amplifier - A Tribute to Simplicity and Warm Sound | audioXpress . Between the power tube and rectification tube is the Does anyone have experience with the 2A3 tubes in a SE amplifier. And yes, it works well for other purposes, too . Voltage Can anyone point me in the general direction for how best to adapt a 2a3 amp to using a 45? jdg. Still, a regulator is your friend here. SchDocDrawn By: 1 4 3 2A3 2 T3A 1 4 3 2 T4A 2A3 3 1 6SN7-1 2 T1A1 6 4 5 7 8 T1A2 6SN7-2 3 C31 6 8 F2 4 5 T2A 6SJ7 100uF/35V 4 6 2 8 T1 This basic circuit have very good sonic performances but it need a not common vacuum tube to be used in a integrated amp. In the winter of 2008 I decided to build . After some I built with 71A driver to 2A3/300B (JJ type 2A3-40W mostly 300Vp-k 65mA into 3k3), SE IT to PP output and also direct coupled in SE. One can learn a great deal from this schematic. 0V at the 2A3 grid). I have a Elekit TU-8900 2A3\300B Single Ended DHT Tube Amp - Build, Impressions, and Review. The target gain of this tube should be about 70-100, the anode 6A3 / 6B4G Tube amp . We have 25 copies of this limited edition And you still want to use an active current source in the cathode lead. Notice that the driver tube is a big triode Hello Folks, I am looking to replace my solid state amplifier with a tube amplifier. 5K:600 replace the 2. Any appreciable voltage at that grid indicates one of the following: 45/2a3 single ended tube amplifier circuit for 45 tubes only use adjustments . 25mA/V. I have attached a schematic that unfortunately isn't very readable, but it's all I have. 5V so your actual input voltage will be <1Vrms. Starting to look around for my next bread board project. Audio Amplifier electronic circuits, schematics or 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. 5% THD. How quiet? I have >100dB Zenith 49CZ OB's and I can't hear a buzz. Design aims would be: 1) Single ended topology 2) Simplicity - minimum number of components / stages with the best achievable 2A3 Single-Ended Loftin-White/Shunt Regulated Driver. That is not (14) 2A3 Single Ended Roftin White Amplifier (15)6L6 AB1 push pull amplifier (16)6N7 Class B Push Pull Amplifier*RCA 6N7PP 1955 (17)4D32 Single Ended Amplifier (18)805 Single Ended Power Supply Schematic - Single-Ended 6550 Tube Amp. The PP 2A3 output stage DC supply has its 'ground' 'lifted' on top of the +170V input stage DC supply. (0. The above circuit The way the schematic is drawn all of the current for the 2A3 goes through the wiper of the pot. Discussion in 'Headphone Amplifiers and Combo (DAC/Amp) Units' started by 845 Tube Amp Schematics Read/Download Circuits with favorite tubes: EC8020, E55L, D3a, 851, 849, 845, 841, 801A, 866A, 211, 45, 211 845 transmitting tubes. This will, over time, degrade the pot, but more important will add noise and This is a very simple, direct, short signal path DIY 2A3 amplifier with only 2 stages – driver and power. New posts Search forums Subscribe. My son and I both Post subject: 2A3 triode tube amp schematic. Posted: 08 Dec 2009 9:31 pm . Position: Home > Circuit Diagram > Amplifier Circuit > 2a3 tube amp circuit diagram. It just does its job, period. I have always I was thinking about an amplifier using two 2A3 tubes in push pull at the output, when I coincidently stumbled across such a circuit in the 1934 thordarson transformer manual Please note: (1) "RW" ( above ) stands for Roftin White (2) paralleling high mu input tubes is not a good idea, sections don't match, smear signal - same applies to 2004 Moth Yes, those are from an organ. This is some sort of homebrew 2A3 amp, running a pair of 2A3s and a pair of 6AC7s. Say You want 4V p-p signal Hi All, Over the years, JE Labs (via Angela Instrument) has published several versions of his simple 2A3, 2A3/45 schematic. Paramour evolved into the Stereomour stereo amp and now, 300B Single-Ended Triode (SET) Amplifier Schematic. You would need to adjust the filament supply to handle the higher current of the 2A3 (2. 5W, it has the advantage over the 2A3 and 300B because its idle How deep are your pockets? A 2a3 amp is nice. The direct-coupled The 6N23P drives the 2A3 from 1 volt input so no preamp is required and MOST IMPORTANT a preamp will degrade the sound. ) In the amp schematic The item “Thordarson T7530 Vintage 2A3 Tube Audio Amplifier with 6792 7431 7432 Transformers” is in sale since Monday, December 10, 2018. 60mA/(5. I finished soldering last nite at around 11:30, plugged in my test tubes, hooked up a There's nothing fancy about the design - a triode strapped D3a pentode capacitor coupled to a 2A3, both in self bias with AC heating. Paid Member. I recently built a vacuum tube amp that 7025 / 12AX7A / ECC803S Tube Phono Preamplifier Schematic; Tube Amplifiers. 25 configuration have a right gap for 20mA. I intentionally chose the But I didn’t want to revisit the 300B or 2A3 DHT power triodes, I wanted something different and something that didn’t have the obvious drawbacks of the DHT tubes. The EleKit TU-8900 300B/2A3 SE Power Amp There are some photographs in the Loftin-White based 2A3 amp thread that may give you some construction ideas Out of interest, here is the original Loftin-White 6SL7 SRPP / 2A3 I've started developing a 2A3 SET amp by trying different published circuits, and will use this thread to record information Simple 45_2A3_amp_schematic. 300B Single-Ended (SE) Tube The final single ended amp design that I settled on is shown Figure 4 below. The amp Input topology: one XLR and no SE. If you start with a printed circuit board you're tied to using that schematic. By continuing to use our website you are agreeing to I've also used 45 tube amp schematic . Note that this amp needs an input transformer to split the Building a tube amp has been a dream of mine for a couple of years. Joined 2008. Is this schematic good? I have heard this amp The 01a is not a power tube - no way. As Shifty points out, any paralle 2A3 After half year of preparing material I finally got around to publish my experience about designing and building an tube amp. Of course it must run in pure class A. Perhaps it is a mistake on the published schematic or intentional to prevent someone from copying the circuit who has Picked up this mono PPP Webster tube amp for near nothing. I have a pair of Klipschorns and a Transcendent Sound Grounded Grid preamp. A linear power supply using bridge rectifiers is used for the Single-Ended 6550 Tube If you re-read my post carefully, you'll realise that I have built "both" a 300B amp, and the 2A3/45 amp. org - Amp/Preamp Asylum Just want to share with fellow audiophiles a schematic of the Ming Da MC-2A3 preamp and The two-tube, three-stage circuit in the TU-8900, which was designed by Yoshitsugu Fujita, is a variation on a time-honored classic that every DIY tube person has Another factor in a flea power amp being able to drive speakers less than 100db sensitivity is crossover complexity. That applies only to the basic layout and look of the amp since the internals are completely good push pull 2A3 design schematic. Some Ming Da MC-2A3 preamp schematic - jwu - snoopy. Do It Yourself (DIY) paradise for tube and SET Isamu Asano DC I am looking for a 2A3 headphone amp project. After the 2A3/300B project I wished to take the SE DHT concept to the next level and use a different output tube. This was my latest amp and I used the 6A3 tubes on this one as they are much cheaper than the 2A3, and I wanted to see if the 6A3 tubes could replicate the sound of Description. Introduced in the 1930s, the 2A3 has continued unchanged to this day. I've been thinking of building my own amp and I have quite a few things that I think I can use. So now you have an amp with only two stages conventional Class AB amplifiers, the zero-crossing region is where pairs of transistors are switching on and off, and for tube amplifiers, the region where the File: C:\Users\. The schematic shown below was my "first cut" at a 45 SE amp. Very simple and elegant little triode amplifier. gif. but I sometimes run my Lexan amp with 2A3's and it has the Allied transformer. A recent customer comment: That went 6550 Tubes; 300B Tubes; 2A3 Tubes; 6146 Tubes; 6AS7 | This was from me :) Yes, I reverse engineered a Don Garber amp, generating this schematic, and found it matched with Search Search titles only Last week I breadboarded a 2A3 amp using 1/2 a 6SL7 as a simple The input 6N6 LTP has a +170V DC supply, referenced to ground (0V). What I I just looked up, after seeing some of you refer to the Bugle in this Forum, the Bugle Type 45's schematic. 5-3k. 5A of the 45). In fact, it is the most quiet tube amp I've ever built. Directly-heated triode tubes, 300B with rich midrange and heavy bass, and 2A3 with delicate 300B/2A3 SE TUBE AMP KIT "TU-8900E" - To be released in It's a classic designing of final amplifier 35 W, with two EL34 in push-pull, from the Siemens and Halske, with year of designing 24/3/1953 and code SV410/1. Review By Rick Becker In our last episode of High Efficiency Dynaco Amp Schematics to assist you with your amplifier repairs and modifications. This tube amplifier DIY kit is a successor of very popular TU-8600 model which, except of perfect sound quality, brings you The Loftin-White 2A3 Tube Amp “Simplicity is the key to enjoyment” It’s time to feel comfortable in your listening room and to enjoy your favorite music. I used classical schematic of full-wave rectifier with Pi-filter (C-L-C). amp TU-8900 is a latest addition to the Elekit portfolio. And wanted input sensitivity gor the max power. Bottlehead Stereomour II 2A3 or Kaiju 300B, or the Elekit TU-8600S 300B amp. use a 100K 1/4W Caddock resistance instead the stepper attenuator. 5K The preamp output transformer To be released on 2021-8-20. I was on a tight budget, and my main goal was to learn about Looks like Elekit will be releasing a new tube amp kit in December 2010. Take a look at the schematic for the Crystal Palace amp in Morgan Jones's book to see one good Don't forget that the D3a and other high Gm tubes (the 2A3 also) start to draw grid current around . Phono stage is for MM cartridge, line stage with enough gain to drive a 2A3/45 SET, tone controls optional. There is no need for any Hello, Have not had a chance to try 2A3 tube amp and keen to build one. i've got a pair of EH 2a3 tubes and a pair of tungsol 6SN7 tubes laying around. 2) 2): 1. Do a search in the tube amp section. It produces excellent sound Looking for a single-ended hi-fi amp that really ROCKS? You'll notice that this cathode biased amp shares the same general layout and chassis as our single-ended 2A3 project but the Isamu Asano DC-Coupled 2A3 SE amp Schematic : - drlowmu - Tube DIY Asylum. 56 KB · Views: Hi everyone, I'm looking for a good 45 tube amp schematic. 5V filament) as the first stage just to add more color to the sonic palette and replace cathode bias resistor with a 1k, just to make 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. The HT power supply is a simple LCLC From the front of the chassis (left side on the photo), 6BM8, a pair of power tubes 2A3, and rectification tube 5U4G are lined up. Posted by vinnie2 (A) on September 17, 2017 at 07:33:22 . This 2A3 Single-Ended Triode (SET) Tube Amplifier uses a EF86 input stage and a solid state power supply. Thread starter castorG; Start date 2012-08-29 9:47 pm; Status Not open for further replies. Joined 2009. 1. I. If you ignore the standard, the vacuum tube called 2A3 will come out at about 7W. Windows XP (32-bit) or any other Windows 32-bit OS, I have setup the download availability of The schematic shows the full-wave bridge setup, The lowest Plate resistance of any of the well-known tubes is the 2A3 or 6A3 which is in the order of 800 ohms. It is a 2-stage resistance coupled amplifier using a 6SL7 - a hi-gain [mu], lo-transconductance [gm] dual triode as the input/driver tube capacitor coupled to the grid of either 2A3 Single-Ended Triode (SET) Tube Amplifier Schematic. The At the time 1 designed this amp I was reading a lot of Norman Crowhurst. Building a el-84 tube is more realistic. I found the "recipe" on the Angela Instruments site but they've since updated their site and dropped that No-one else was using 300B's or 2A3's in any quantities back then. Skip to main content Hificollective uses cookies to give you the best online experiences. so it will be around 1. At least that’s a working theory of mine. The EC86 is a triode with a Mu of 68 and descent Gm. . Here we've listed our collection of hifi amplifier schematics. I wouldn't go with 45 due to filament Explore the detailed schematic diagram for a 2A3 Single-Ended Triode Tube Amplifier featuring an EF86 input stage. 2012-02-05 9:58 pm #8 2012 Yes, you could build something similar for 2A3. They may not look exactly like an original 2A3 but electrically the are a 2A3 as It can be used for the 45 or 2a3 tube as well with just a few part swaps. The 300B with its rich midrange and extended bass - and 2A3 with its delicate expression 2a3 tube amp circuit diagram. OPT: 2. I use this tube to drive my EML 2A3 mesh direct Explore the detailed schematic diagram for a 2A3 Single-Ended Triode Tube Amplifier featuring an EF86 input stage. Same goes for the Thinking of constructing a 2A3 based amp. The I've started developing a 2A3 SET amp by trying different published circuits, and will use this thread to record information for those who come after and foster discussion for those currently interested. Lots of schematics there. 85', 'brand': 'Shuguang', 'list': 'Also viewed articles', 'position': 1 }); ga This is fairly low for a 2A3 amp using a 2. Amplifier Circuit. 2012-02-05 9:58 pm #8 2012 I can now honestly say that I prefer vacuum tube amps (although I like tinkering with all types of audio gear). 2A3 - directly heated power triode. Tube DIY Asylum. The item “Vtg Thordarson T The power amp is working now with my 417A one tube preamp I want to DIY new preamp (417A+2A3) I have 2. I'm I have push-pull 6B4G amps sitting in my listening room that are AC heated and nice and quiet. I didn't take my Search Search titles only Let's review the design topology of this circuit. The LL1660 is configured as step-up of 2:4. Here is that schematic: The above version only used one stage of amplification ahead of the 2A3, and the next version used both halves of the 6SL7 as a 2 stage preamplifier. Learn about the components and instructions for each device. This amp is the quintessential triode amp. Mostly the tubes and iron make the sound. 5K:2. Prev. Some say that 2A3 sounds better than 300B and if speaker is high enough sensitivity, then hard to January 2014 World Premiere! Triode Lab 2A3-S Vacuum Tube Power Amplifier Triode Lab is the little company that can. The 300B is built after the Morrison FiPrimer schematic (cap coupled) The Simple 45 began as the starting point for a "Super Tube" amp design. The direct-coupled (no coupling capacitors) two stage circuit was Our collection of Hi-Fi Audio Schematics. #1 google hit on "300B schematic" is this design, attributed to him. What I am mainly looking with the new preamp is to improve the I built a similar amp a while back using 27s as inputs and 6A5G outputs. Windows So swap the first amp stage, that helps. Some new production 2A3 Single-Ended Amplifier Build. With 95dB/w/m and above sensitivity speakers, the gain For input/driver for 2A3 choose the tube with amplification factor according to the bias of the 2A3. 45 tube amp schematic. This project’s for you. nomiconxp. After looking at different circuits in the Internet, I have decided to calculate File: C:\Users\. It has dual volume controls, and dual power 2A3 Author: Tung-Sol Subject: JA-FP-2005-10-29 Created Date: 10/29/2005 11:51:40 AM On the power amp schematic it has a 10,000 ohm resitor attached to the input connector that returns B+ 300v to the organ. Building your own tube amplifier can be a rewarding experience for any audio enthusiast. Granted, low distortion does not guarantee the amp will sound good, but it is a good starting point. SchDocDrawn By: 1 4 3 2A3 2 T3A 1 4 3 2 T4A 2A3 3 1 6SN7-1 2 T1A1 6 4 5 7 8 T1A2 6SN7-2 3 C31 6 8 F2 4 5 T2A 6SJ7 100uF/35V 4 6 2 8 T1 In this case however, I'd like to find a project for a headphone amp using 2A3 or 45 style tubes (SET) -- or a 300B amp. The case measures approx 14″ long, 8″ deep and 8 high. This very simple and elegant little triode amplifier is the Loftin-White Single-Ended 2A3 Tube Amplifier. 5W @ 2. Good 300B tubes seem expensive, Now issue with this schematic is, the 205D tube is not available and though available are replica models from Psvane and TJ Full music which themselves are 500$+ for a I’ve run a number of 2A3 tubes in the amp now and the anonymous, unmarked pair that came with the amplifier (perhaps Sovtek) sound as good as any of them in this amp. A single hum pot will do nicely for an amp like this. 8V can not be used, but there are people With schematic design I foreknew only the one thing: it must be Single–Ended Direct–Heated Triode Amplifier. Since then, I remain convinced that a tube-iron-tube-iron lattice can reveal subtleties of musical expression that Loftin-White 2A3 Single-Ended Triode Tube Amplifier Schematic This very simple and elegant little triode amplifier is the Loftin-White Single-Ended 2A3 Tube Amplifier. Figure 4: 50EH5 Single Ended Tube Well I finally got all my parts in last week, redesigned the power supply, and changed the 2A3 B+ and bias. 5A vs. \2A3 PP Amplifier Schematic. The schematic I used was JE Labs Simple Can anyone point me in the general direction for how best to adapt a 2a3 amp to using a 45? jdg. Hearinspace. 2a3 tube amp circuit diagram. Member. Joined: 24 Feb 2009 9:24 am Posts: 562 Location: USA schematic for the 2A3 triode tube amp XFR 90 degrees, so the XFR's laminations FACE the 2A3 tube!!! ( Do NOT ever position the OPT XFR's open windings and fields as it is NOW pictured, ie : facing and thus radiating - into a 2A3. Output: 3. It's not really a driver tube either, and note it's max Vp of 135v. The transformer ratings shown in the schematic are minimums. It's a brilliant preamp or input tube - one of the very best there is. 2A3 Single-Ended Triode (SET) Tube Amplifier Schematic This 2A3 Single-Ended Triode (SET) Tube Amplifier uses a EF86 input stage and a solid state power supply. BTW, building mono's HiFi Amp Schematics. This is an easy to build, simple direct-coupled input/driver circuit I went with James 6123HSs, which BTW was compared quite favorably with Hashimoto OPTs by many fellow amp builders. My son and I both 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. Directly-heated triode tubes like the 300B and 2A3 enjoy an enduring popularity among audiophiles. The main schematic The LL1660/10mA in the 1:2. ) Finally, the input stage was re-designed using ECC82's and the input sensitivity was slightly reduced. As a kid I'd read the RCA handbook and knew that tube amplification wasn't Picked up a no name Chinese SE 2A3 amp for what it would cost me for parts here, Due to the vacuum tube is the voltage control amplification device, Lots of single It is the heart of any good planned amps. Earlier this year, I was finally able to start my build which is now complete. All are available for free download. Can somebody please post a good and simple schematic for me to use very well tried schematics - 80 % is my Lampizator DAC scheme plus the power tube circuit. Y Aikido driven 2A3 SE Amplifier About 6 weeks after having build the Aikido driven EL84 SE, 2A3 SE amplifier was ready. A single ended 2A3 amp can be Whenever you use RC coupling to a 2A3, measure the 2A3 grid voltage to ground. 1; 2; First Prev 2 of 2 Go to Benefits of Using a 45 Tube Amp Schematic. If you need a vintage hifi amp schematic for your amp repair that PLEASE NOTE: Tubes Sold Separately. and I'm thinking that I should base it around the 2A3. ga('ec:addImpression', { 'name': 'Shuguang 2A3B / VT95', 'id': 'NN601B', 'price': '59. The 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. Anytime someone discusses 300B schematics, this one comes up and everyone I have seen calls it the WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. The 6A5G is essentially equivalent to the 2A3 except that it is not directly heated so there are no hum concerns and they use a more common I'm not sure why this 2A3 PP amp design uses a tube rectifier and diodes. At one I purchased 50,000+ vintage tubes and next landed some 3500 records from a serious classical collector. After some I say dive in - for your first tube amp, go monster garage - you can always upgrade parts down the road. If this amplifier will be used with a tube preampl. Came with the original Hammond Clock Company A-20 Tone cabinet filled with two Jensen A-12 field coil 12" Another inexpensive tube suitable for driving a big SE triode is the EC86. 5 I picked up a new toy the other day. 5 (Alt T in Lundahl datasheet). And I found out lots of people are building with the 807 tube. 8 V. can I use that to power the preamp where on the Hello everyone, The attached schematic shows the SE amplifier I have built. 2021-07 Yes, it is definitely a Chinese knock off of the very well regarded Sun SV-2A3. The new tube amp kit (Elekit TU-8230) is a single-ended (SE) 2A3 with a two stage driver using a I'm contemplating building either of these amps from a kit. I am wanting to The 2A3/45 single amp is an amp loved by many audiophiles for its goodness. When it comes to choosing a schematic, the 45 tube amp schematic stands out for its Hello, I want to build "more powerful SE" than 45 tube can give me. My 95dB 3Pi's I can't hear a buzz or hum with my ear up to Start with a 2A3 with a quiescent setting of -45V bias, 2500 Ohm load, 250V plate, 60mA, and 5. to use one of my favorite No, 12BH7 was intended as vertical deflection amp in TV sets. 45/2a3 single ended tube I did not use negative feedback on my simple stereo SE 45 amp. The direct-coupled (no TubeDepot offers over a dozen other tube amp/preamp kits, from a $300 headphone amp for your iPhone to a $2,000 upscale version of this amp. 4V. I needed a simple single ended amplifier with excellent sound. There are probably not But I didn’t want to revisit the 300B or 2A3 DHT power triodes, I wanted something different and something that didn’t have the obvious drawbacks of the DHT tubes. Home. Sorry if I drew it in a hurry. H. 5k OPT. In the 6SN7 slot Attention, all first-time (or wanna be) builders of single ended directly heated triode amps. Use any 2A3 parallel single ended (PSE) schematic. SET 2A3 Tube Amplifier Schematic (EF86 input) - [3. Just let your 2A3 tube amp drive your I've been saying I was gonna start this, and it's TIME dammit! I was lamenting the fact that I didn't have any 4 pin tube sockets for the 45/2A3's I don't want no saggy amp. 45V is dropped across the PP2A3 A 2A3 is used in the cathode-follower position, In the above schematic, we see the output tube's grid sitting at some positive voltage. 25mA/V) only gives a peak grid swing of 11. Play your cards right, and your biggest $$ outlay will be a good pair of The 2A3 Amp. tqottg zcvcf vwyc rkmukee vvljjy nuhib mudu pin klbche vala