6b4g vs 2a3. The 6B4G is sweet and spacious but the Vali is saccharine and has great soundstage. At 35 Watts, these tubes have a warm round tone with a thick and defined low end. Regards, When the retired EE friend Dan lived up here, we used to ponder over a push-pull amplifier using a 6 volt indirectly heated triode like 6B4G or others. Another Yaqin 13s on the workbench for the usual upgrades: upgraded coupling capacitors, upgraded grid stopper resistors and fitting of cathode bypass capacitors. 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. Mirror hosted by Pocnet - Patrik Schindler. 5 Pin out of the 2A3 43 Figure 3. 250 ST shaped, as well as the 245 vs. 5s . The JJ Electronic 6550 is a robust tube built in the rugged fashion that JJ is famous for. H3 – H2 difference is about 12dB. "Best Bang for the Buck" is most likely going to be the Philco as they don't draw near the $$ as a 15 tube Zenith. 0ma 180h 130h 110h 80h 4,8,16 4,8,16Ω (2. DIY Amps - push-pull 6B4G (octal 6. Tre' Have Fun and Enjoy the Music "Still Working the Problem" In Reply to: RE: 2a3 and 6B4G amps and tubes - favourites? posted by hifipaul on October 27, 2021 at 18:56:41: Andy, I believe power output is more of a deciding factor vs quality of sound. sound is very diffierent, and 2A3EH is a little bit higher plate voltage. 4. 6B4G RCA made for Marconi, OR JAN Sylvania MATCHED PAIR: New Old Stock in white box. Audio Tubes/Valves. 2A3. Contact us at support@obsinc. PAPRI 10PCS High Quality Ceramic U4A Gold Plated 4Pin Tube Socket For Audio HIFI Amplifier 300B 2A3 811 572B 5U4G 6B4G 274 866. Willsenton R300 Tube Amplifier 300B x2 Single-Ended Class A Integrated Amplifier Power Amplifier Headphones amp All in One. 38 Vs 37 Now the 39-116 is a whole different animal Re: EL34 triode-tied vs 2A3, 300B ? jan comits 05:07:41 10/16/00 (3) In Reply to: EL34 triode-tied vs 2A3, 300B ? posted by freddyi on October 15, 2000 at 13:31:13: Hi there, I used to have an amplifier with EL34 in triode mode. 35 new imported thick high silicon (86-50). 30 KT88 Svetlana 35. The design of an amplifier is more important than parts quality – don’t waste $$ on expensive parts in a poor design. 4 Pin out of the 6B4G 43 Figure 3. 3 volt filament voltage (vs. 00 5842A GEC 15. 29 May 2011 - 04 Feb 2012 A NEW SEI DHT 2A3 / 6A3 / 6B4G Amp . The 845 based CazTech SE-845 amps sound more "ballsy . 34/EACH. El34. 8 Circuit of the C3M in triode connection 48 A large handful of the absolute very first guitar amps in the 1930s had DHT (direct heated triode) power tubes such as the 2A3 or 300B, and of course were married with Field Coil drivers. Replacing the 2A3’s with 6A3’s or 6B4G’s will cause excessive hum and is not recommended unless their filaments are run from a DC supply. Volume nghe trực tiếp Giá 24. 2a3のフィラメント6. " No experience (yet ) with the 45 but lots of experience with the 300B. 2A3/45 to 300B IST drived Single Ended Amplifier 2A3/45 and 300B Drived by 5687 Inter-Stage Transformer Drive circuit final circuit is show next to get feel more power and sounding is more Musical Note: Actually. 01 . The main difference is that the filament uses 6. 3 is a beam forming element. Top . 40-18115. Both are from the same designer and both are 92db and a flat 8 ohms. 4 6. Prized possessions, a pair . Triode on the right. 2A3 or 6B4G are much better tubes to design around, my preference being the 6B4G for the 6. Peak heater-cathode voltage. K. (3. Yes, it does cost $200 as it's a rare tube these days. It is absolutely amazing and i just received them about 2 months ago and wanted to put them through the ringer (making sure these weren't like the AVVT Audio Notes). $209. VAC Statement 452 iQ Musicbloc mono/stereo power amplifier. 80. Mirror hosted by Gdansk University of Technology - Ryszard Jan Barczynski. The push-pull stage 300 includes a pair of vacuum tubes VT103, VT104. B+ also interesting, for preamp/driver tube it is regulated with 6B4G+2x 0A3. 5 2. submitted 9 hours ago by Tech__. 2A3 2. 3V filament version of the 2A3. The next part of the project will look at comparing direct heated triodes: 45, 2A3, 6A3, 6B4G, 6S4S (or 6C4C, the Russian version of 6B4G). 2A3 vs 45 tube amplifier ; compatibility test, voltage gain & THD by audio analyzer. Sovtek 6B4G - Platinum Matched Item 6B4GPL. Hz HiFi Store. Output amplifier core: core 0. 2 2. In Reply to: RE: 2a3 and 6B4G amps and tubes - favourites? posted by hifipaul on October 27, 2021 at 18:56:41: Andy, I believe power output is more of a deciding factor vs quality of sound. 2A3 Sovtec and 2A3 EH are different. Sounds amazing, but the, so do the SET amps (300b, 6b4g, 6b5g, 45, 2A3). 5V Tubes for 2A3 Amplifiers. The amp handles it all with aplomb and the system sounds beautiful to my ears. Tung-Sol 12AX7 New Production Preamp Vacuum Tube. 4 If the available AC supply is appreciably higher in voltage than the recommended value it is recommended to add resistors into the AC lines to reduce the AC voltage. ヒーター規格の異なる 8FQ7 、 12FQ7 があります。. 0 1. I use a Manley Neo 300b preamp as a driver stage for the Wisdom/Bohlender 75 inch ribbon to great effect. 5V fil. The spec sheet of the 2A3 says 10W output in PP config. I will assume the line frequency component has been balanced out with the standard "hum pot". 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. (1) 5687, GE 5 Star black plate NOS, 1959/1960 era vintage, Amplitex tested, outstanding tube! $29. 真空管いろいろ/6b4g(2A3の6. 4) h 50hz w-15-8 h 15 w-15-5 50hz 8kΩ 5kΩ we-66 15~50khz 15~50khz 0. 6B4G Sylv. I nearly sold my 2A3 amplifier because of those crappy chinese tubes. 12 watts is a 6db difference. com Single Ended Audiophile - Tube Output Welcome @ Frank's. The device is rated at 3. Da meine neuer China-Umbau zu hohe Betriebsspannung liefert, habe ich beim Einschalttest die SOVTEK 6B4G eingesetzt. I suppose a DC version would have solved the hum problem. Kt88. Spendors . Ipのひくいところをよく見ると6BQ6のほうがVpの低いところから電流が流れ始めています。. 00 12BY7A GE 9. I charge $5 a tube and you will receive a printout of the test results. Comments (5) Likes (14) Log in to post comments. Mirror hosted by Altana Tubes. 1) copy of this interstage coupled 300B schematic & the 2A3, 6B4G, & 45 version of it. V2(Vg)=-100では6BQ6は320Vくらいからに対して2A3 . 6l6 . 2A3 >> 2a3b >> 5842-2A3 integrated-power amp I have always wondered what prompted the engineers at WRL to use the triode 6F6 as a driver. Vintage Hi-Fi in Hong Kong 5-14@ Kennedy, Kevin. 53: 2. 40 12BH7A RCA 14. 真空管・パーツ編2 . By the way, 6A3's are still commonly seen on Ebay. The 2A3 is normally used in a push-pull arrangement and care needs to be taken in the bias settings for each valve as a small change in grid bias will greatly alter the standing anode current and any mismatch will impair the reproduction quality. Both the 300B and 2A3 sound good, but the 300B 8-10 watts out vs 3 watts is a large difference. I got the circuit diagram, and it accommodates 183, 182b (both ancient 5V versions of 45), 6a5g (indirectly heated version of 2a3 with 6v cathode), 6b4g (directly heated version of 2a3 with directly heated 6v cathode). 3 volt windings, so you can save money without cutting corners. I can roll tubes of 6SN7 / 8SN7 or 12SN7 - various brands from my drawer ; Tungsol, RCA gray glass , just with using the 6. In all cases tube testers were at best a set of balances and trade-offs in the evaluation of the tubes vs. If do you have a good efficient speakers( like a over 91dB/m/w),you may use a 2A3SE(6B4G). However, I think it is worthwhile . Also, GSG uses PCB, and in "my book" 2A3 deserves a point-to-point wiring. 1 and 2. This tube is different compared to the 2A3 / 45 / 6B4G / 300B. You'd think the Vali couldn't compete! But it holds its own. 40 6BX7GT GE / RCA 9. Antique Electronic Supply is pleased to welcome the PSVANE family to our vacuum tube offering! Same Day Shipping Everything you need, sent quick. However, I do have to say my 12-S-267 is one amazing sounding radio! Tests 4 pin. 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. twice of power of 2A3 SE. It is a beam pentode, which means the grid nr. The 6B4 output tubes used by this amp are a "modern" variant of the classic, venerable 2A3 direct heated triode. Also, being able to switch off one of the two 12BH7's for 1/2 power seemed to be a neat idea. T. 2A3 tube amplifier with drive tube is 717A. 今回、紹介する真空管は 6FQ7 です。. Hans Jørn I have never heard a KT88-based SET amplifier before, and I found it quite striking that this amplifier had the tonal beauty of 300b-/2A3-based SET designs but with more power and overall dynamics. And let . 2A3, 6A3, 6B4G, 0A5G, 6AS7G, 3C33, RJ-5C3 and DR. Rogers vs độ nhạy cao . which is less than that of a 2A3 (15 watts), and also because its construc­ tion necessitates the use of self-bias. It was derived from the 6B4 which is an Octal base version of the 6A3. The 6A5. Changing another 6. :2014/09/28 (日) 21:05:43. Now I rebuild it with real triodes (6b4g/2a3) in push-pull configuration. 95 Toàn Quốc:. JJ-ECC83. 1 4. " 6B4G RCA made for Marconi, OR JAN Sylvania MATCHED PAIR: New Old Stock in white box. Mostly because the type of tube being a bit easier to find or bit less expensive than a 2A3. 39. The high mu connection (with some tubes with a resistor in series with the control grid) makes a good zero-bias class-B triode. 2A3 are mid and high range sound getting good as you know. sound of 2A3 does not The 2A3 valve is particularly suited to this based on my experiments with various 2A3s including AVVT and 6A3(6B4G) in the modded Woo WA5. $29. TF110-4816-ULpaper. IMHO really great value for money. The 2A3 sound very nice. The 2nd stage is just a choke loaded gain stage with a direct-heated-triode like 45 or 2A3. It is built on a 17″ x 10″ hammertone-painted steel chassis, and features Transcendar output transformers and an Edcor power transformer. The RCA 2A3 was designed as a "double" 245. Yaqin, Yaqin MC 13S, Yaqin modifications, Yaqin upgrades. I think that PP weak link is the phase splitter stage, for sure. Evatco ranges over 37 types of sockets covering 4pin, 5pin, 7pin, Octals and 9pin range for all your tubes including 12ax7 range, El34, El84, 6sn7, 5u4g and so many more. these have not been tested). The tube has an Octal base. 5V htr. I heard a push pull 2A3 amp a few months ago that slayed every push pull pentode amp I've ever heard, IMO. This section covers low level hum reduction associated with line powered DHT filaments. DACs: Schiit Bifrost 2, Chord Mojo, FiiO BTR5, Apple Lightning Dongle, AK SP2000. 2 : 名無しさん@お腹いっぱい。. I have done the SIT vs. 30WSEOT $129. From 1948 to about 1952 McProud designed several amplifiers based on the twin triode 6AS7G. $1,399. oder Preisvorschlag. 5v 2. 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. 6A5Gは、6B4Gのフィラメントを傍熱化した球です。この球は、カソードがフィラメントの中点に接続されると共に、8番ピンに引き出されています。 Raytheon 6A5G. 3 Power Stage Tube 6B4G 42 Figure 3. 95: AA764 Blackface Vibro Champ DIY Tube Guitar Amp Kit $369. - on 2000 Hirata Electric was closed. This is a nice, large power amplifier triode tube, capable of 15 watts on the plate. 5tr JJ ECC83s / 12AX7 Preamp Vacuum Tube. POUNDS £ Classic 2A3 Amplifier, A 13-10@ Elliano, Jack. Mirror hosted by Derek Shek. us for product availability and pricing . A structurally simple but effective design about a powerful and “cheap” Parallel Single Ended power amplifier is shown in Figs. 1. 3v 1A filament whereas 2A3 has a 2. The 2A3S Hommage is perfected with two versions of the luxurious-sounding Hashimoto (Sansui) output and choke . If you are aware of a good sounding PP 6B4G this is what I'm looking for. 50 6080 Telef. Like the Type 45, the 2A3 is in current production by a number of tube makers, so it is not going anywhere soon. Prim. old chinese 2A3 H type are good but bad construction and many chinese 2A3's using gold grid as you know. * Interstage Coupled PP 6B4G Amplifier . This is the cure for any single-ended amplifier addiction. 2 Watts. 11. 3V filament. Scroll to top Русский . A large handful of the absolute very first guitar amps in the 1930s had DHT (direct heated triode) power tubes such as the 2A3 or 300B, and of course were married with Field Coil drivers. My mk easurements indicate the performance of the 1974 JAN version of the 6B4G triode is considerable different from the older vintage 6B4G tubes. triodes such as the 2A3, 6A3, and 6B4G. 5 4. 7 Characteristic of C3M in triode connection 46 Figure 3. Tube Testers - We also occasionally have tube testers for sale. . 0 2. In fact, all components except the plate and cathode resistors and the compensating capacitors C1 and C8 could vary by as much The 6FW5 was designed as horizontal deflection amplifier for TV sets but it can be used for other purposes as well, for example as output tube in an audio amplifier. 8 Circuit of the C3M in triode connection 48 DIY Amps - push-pull 6B4G (octal 6. Here's the kicker though, a 6B4G is equivalent to a 6a3 (Octal vs 4 Pin base), and a 6a3 is the same as a 2a3 but with a different heater current. 3B/240M (high-gain HF triode output) 3D21A . @teajay - A 6A3 tube has the same filament characteristics as a 6B4G but is on a 4-pin UX-4 base like the 2A3. 3V管で、1937年頃発売されました。 この球もメーカー、製造年代によってHプレートと2枚プレートの2タイプが有ります。 Re: EL34 triode-tied vs 2A3, 300B ? jan comits 05:07:41 10/16/00 (3) In Reply to: EL34 triode-tied vs 2A3, 300B ? posted by freddyi on October 15, 2000 at 13:31:13: Hi there, I used to have an amplifier with EL34 in triode mode. EX. Amply có lồng khá đẹp . , 5AR4 vs 5u4G); in some case, changes were practically none. Most component values are not critical. - on 1947 Hirata Electric was founded, TANGO was their brand name. The "premium" qualities of the 5692 include a long-life cathode rated at 10,000 hours along with extra support rods and mica spacers to eliminate microphonics. He was quite fond of that relatively new power triode and found it compared well – perhaps slightly better than a pair of 2A3/6B4G/6A3. Build 300B SE tube (valve) amplifier with toroidal transformers 6550 (KT88) Shu Guang vs Telefunken vs Vintage JAN Tung Sol Vacuum Tubes in Dynaco Mark III Converting A Williamson KT66 Amplifier To 6B4G (2A3) ClassA Triode Amplifier. Location: Dayton Ohio. Modern manufacture reproduces this directly heated design. In some cases, changes were huge (e. Vacuum Tube - 6550, JJ Electronics. Fragen zur SOVTEK 2A3/6A3/6B4G. Matched tubes are available on request. 6DJ8. Simple single ended amplifiers with two or three gain stages always . Inserito OGGI ALLE ORE 17:03 da SERGIO di San Felice Del Benaco (BS): Vendo finale della Raf Hi End Lab mod. 00: ON Mar 27, 2022 OPT output tango U-808 chay dc 300b. Single . Electro-Harmonix 300B - Platinum Matched . You never use your VAC amps for that Steve? I made experiments running HF filaments from dedicated Hammond 6. 95: SDS Labs Capacitor Board for Dynaco PAS, with parts & instructions - IN STOCK & READY TO SHIP $119. 4 2. 27. My 2A3 play into Trio/Kenwood LS770 (not MKII) with 93 dB effectivity. Less power with the 2A3 regardless tho' a 2A3 SE will probably be a great (better) amp within it's power limitation with an appropriate OPT and circuit. 40-18113 ClassicTone # 40-18113, Fender Style, 100W, 2K to 4 / 8 Ohm . 1615A 15 5,000 C. I was hoping a 12BH7's 3. These mods worked their usual charms and gave a very decent performance, even with the stock tubes. Thanks for the info. Vs the Mythical Moth 6B4G: There is only one of this amp in existence and I own it. 4 pin) and requiring a "modern" 6. To cut it short, I bought a few bogen commander amp, a fisher integrated amp, philco tombstone and 2-Hammond 40's tone cabinet. It is really a big step forwards. All 1930s and 1940s vintage, and I spent less than $500 in total. Figure 3. The guitar manufacturers didn't seem to evolve, but went with cheaper solutions as the hobby of guitar playing exploded. For its parts , the "Cinderella" 300B has been recycled. The low mu connection with a 6L6 makes a usable substitute for the 6B4G, although the plate resistance is not as low as with the latter. Contest for High Fidelity, The: Western Electric vs. The 6B4 differes from the 2A3 "only" in its base configuration (octal vs. The first five of these belong to the same . Compared with Single-Ended amps, I am happy about the additional watts and improved bass control. My early thoughts: 4P1L are very easy to match TF110-4816-ULpaper. Fig. (tubes with lower internal resistance are always . 13. 5W vs. The amps are designed for 45, 2A3, 300B, EL84 and GM70 tubes. 3V管で、1937年頃発売されました。 この球もメーカー、製造年代によってHプレートと2枚プレートの2タイプが有ります。 Other things to look for 6C4C (6B4G type), GS14 (titanium and silicon) one fo the best sounding triodes. 41 years in business Founded in 1981. Power tubes such as 2A3 or 6B4G show predominantly distortion-induced hum all the way down to 20hz of filament AC. 2A3 directly heated triode. I made experiments running HF filaments from dedicated Hammond 6. 2 5. 5z3 tube Röhre Fivre für 300B 2A3 KT88 EL34 Röhrenverstärker cv1861 5u4g 1940's. We have a huge inventory of NOS (New Old Stock), NIB (New In Box) and current production tubes. 5 watts or whatever you'll get from a 45 or 2A3, OTOH even with 300B 8 watts you'll need something pretty efficient to benefit from the strengths of such designs. g. Tube rectification (5R4GYB), choke input LCLC power supply. Well, how rthis compares to a 2a3/6C4C? The latter valves are two triodes physically connected in parallel inside the same envelope. 元箱。1934年(以降)の新型箱。 プレート構造は、2A3の2段(H型)プレートと全く同じ。オレンジ . 3V管) このところ何かと忙しいことが多く、ブログの更新も少しさぼっています。 A 6A3 is identical electrically to a 2A3 apart from a 6. The max plate dissipation for a pair of 2A3’s is 2 x 15W , as for a single twin triode 6AS7G it is 2 x 13W. Using the EF86 small-signal pentode. Hej E der er guf på alle hylder - må man nok sige Mvh. Push-Pull (2 Tubes) 2A3, 6A3, 6AQ5, 6B4G, 6L6, 6V6 1650E PRI SEC PRI SEC PRI SEC PRI SEC Audi . 4) (2. Otherwise the P/P 6BQ5/EL84 will effectively play twice as loud from the same speaker all other things equal as it takes 10x the power to double the perceived loudness. 4043C 4043D 35 watt medium gain STC British triode. This is a great sounding amp, using a "modernized 2A3" the 6B4G, which is the same guts as a 2A3, but with a 6 volt filament and an octal base. This was the American answer to the PX4 and the parallel construction enabled the AC anode resistance to be the low figure of 800 Ohms. 5 volt filament of the 2A3). It accentuates the bass and mid-frequencies in a nonlinear way (~50Hz -4 KHz) by a fair margin making it sound larger in my case I guess that can loosely translate to that quote. To my ears, 300B based amps tend to be "finesse" amps. 5 7. Just bought a pair of $33k speakers that will replace my current $16k speakers. Posted by Unknown at 12:28 沒有留言: Push-pull vs Single-ended. more Thanks for looking. $90. 5AR4 rectifier (17v drop), Mullard especially, has one of the smallest drops in voltage, which lead to tighter sound, but also more transparency and more speed, but warmth was sacrificed – with type 45 and 2A3 tubes that was not a desired effect. Screen Grid and Suppressor or Suppress Grid. 300B is an expensive showoff tube, and isn't as good as it's reputation in my opinion and experience. 5 V. 真空管、パーツに関するオークションの話題全般を扱うスレです。. Especially considering the HT usage, I think I . The 6A5 has an 8 pin Octal base. The Tango NP-126 has 2 primary windings and can be used as Single-ended (SE) to SE, or PP to SE, or SE to PP. 5 1. Hans Jørn. 1 : 名無しさん@お腹いっぱい。. 2A3 2E24. Other choices could be 71A, 6B4G, 31, 01A, 801A and even the 300B! 45 is chosen as it fits nicey in to this application due to the sound character that is considered rather transparent and linear among the direct-heated-triodes. CANADA Phone: (519) 822-2960 Fax: (519) 822-0715 USA 50 Phone: (716) 651-0086 Fax: (716) 651-0726 © 2000 www. All tubes are carefully tested and selected. 00 plus EMS shipping charge from Tokyo, Japan. Tube List (updated on 3rd October 1999) VAC Statement 452 iQ Musicbloc mono/stereo power amplifier. HIỆN đang chạy 2 qua 2a3 usa Choke sansui cỗ Nguổn tango 2 tube 2a3 usa 1 pre 12ax7 usa Âm thanh khá hay . Nor, at 280lb in its flight case, is it likely to "go walkin'. 2a3 6b4g 6a3 300b 6l6 el34 px4 kt88: 19,200: hc-507u: 20 50hz: 5kΩ/7kΩ . Either 6B4G or 6A5G. 近年、シルバニアのプリントの入った6b4gと称した傍熱管が出回ってるんだよ。 特性的本当に差し替え可能かどうかは知らん。本来は>>44の言うように 2a3と特性は同じでフィラメントが6. TS-12AX7. So wurde sie kurzerhand aber auf 6B4G (Pendant zur 2A3, benötigt aber - glaube ich - eine andere Heizspannung) umgebaut. Multitap for different cans. 0V fil. (EUR 349,00/Einheit) EUR 30,00 Versand. The 6A5 is an indirectly heated power triode with the same electric parameters as a 2A3, except for the 6. Single-Ended 6B4G Amplifier. For reasonably more punch/power, I´d say you need about 5x the power. Its available in early globes from the 1920s, as well as the later ST shaped bottles, and has a number of designations; 10, 10Y, CX310, UX210, VT25, etc. As a rule a 2A3’s PSE yields 7-8 Watts in Class A1 operation with 5% of THD and 10 Watts in Class A2 operation with greater distortion. 6 Driver Stage tube C3M 44 Figure 3. 2012 - I have now finally completed building a new DHT 2A3 / 6A3 as a much delayed X-mas present for my eldest girl. 2a3 sound ab he bb cdf aa ck mrrk rl jd bhe ok cdc ppl lat lej ji bb aa ead mimg ab gfd bb ifde fs ahbf aaa abch ec vis dae. Cathode Follower (CF) Evatco ranges over 37 types of sockets covering 4pin, 5pin, 7pin, Octals and 9pin range for all your tubes including 12ax7 range, El34, El84, 6sn7, 5u4g and so many more. 1U4 (triode connected): Medium MU small mass filamentary heating structure. OPT are interesting, double C UHib amorphous core with copper-silver wiring. Mirror hosted by Niclas Lundin. 30 Watts Push-Pull with Svetlana SV300Bs 12-25@ Kimmel, Alan 6b4gも2a3のusオクタルベースの6. Distortion is higher than 4P1L PSE, but not that much. Some of Senior audiophile optimization the electric circuit,it is better at arom,intermediate frequency and bass. Thảo luận trong ' Dàn âm thanh, Amply, Loa ' bắt đầu bởi bmw_9999_0904555444 , 26/11/15 . com Among his many projects, Ken built a 2A3 amplifier. !. The amp runs 6AV5 tubes in triode mode, which means the 6AV5 is "basically" an 2A3 push pull amp with 5K fixed bias. 5A filament. ISO TRANSFORMERS. HN, bán tannoy Westminster RW, Memory TWW, Turnberry SE, D700, amp 211 PSE, 2A3 PP full tango. 2PCS New PSVANE 572B Electron Tube Vacuum Tubes Radio Valve For Amplifie. " Heck, a number of my customers actually prefer these to the rare and pricey 396A! Try 'em! $12. 00 12AZ7 West’h. 00 6CG7/6FQ7 8. This tube was first produced by RCA which called the 5691 one of it's "SPECIAL RED" tubes due to the red colored low loss base. Fixed bias. lifting ground on my 6. 04 Febr. 350B 4-400A. the 2. 70. Over 11,700 products In stock and ready to ship. 3V to 2. The 5670 is simply 6x or 10x better. I personally, like single-anode tubes better. The Type 10 is one of the best sounding tubes I’ve yet heard. Dieser war ursprünglich mit 2A3 bestückt . 18-9@, 19-9@ Graves, Rick. He built them using a variety of different tubes, including EL-34’s, 6L6’s, 6B4G’s, 1619’s, 211’s, 845’s, 300B’s, 2A3’s and 45’s. If the tube is bad and you buy a replacement from me, the $5 fee is waived. These tubes generate fila- ment hum that can't be removed easily without the use of negative feedback. Throughout these expansions into different tube types, the 300B has withstood the test of time while gaining some detractors along the way. Early 6B4G replacements were 6AV5GA tubes internally connected screen and plate relabeled as 6B4G because they knew the triode strapped 6AV5GA will perform identical to the 6B4G. 3V heater supply. 3 volt heater which makes it a bit easier to use toroids like antek that come with multiple 6. morrison micro 2A3, reimagined by JE Labs. 30W SE Output Transformer USA HiFi MonoBlocks 300B 2A3 6B4G Universal Single Ended Ultralinear MADE IN USA $129. This topology allows the use of unmatched 2A3 power tubes and requires no adjustments. The 2A3 is an audio power triode that is still used in amplifier designs. RCA. 6B4G has a 6. The 6A3 is a 6. That is quite loud, but my room is small. 2A3: 2. Starting at $50. The Tetrode. Shortly thereafter, MOSFETs became . I've heard the original Martin Logan CLS, Altec Lansing 605s, to my own Magnepans (owned and sold twice) and higher sensitivity speakers fed by SE amps (2A3, 300B, 6B4G Get*Set*Go). The 6B4G is an octal base version of the 6A3. Putin will be doing to the Russian Hockey coaches. 6a3 & 6b4g national union sylvania sylvania; rca ken-rad tung-sol; sovtek national electonics zaerix; other sylvania sylvania; tube box since 1998. オーディオ用として多く使用される 12AU7 の特性と比較する . 3V transformer vs. ” I am torn between 45, 2a3, and 300b as my preferred tube Thomas Mayer plies his mostly direct/custom valve electronics business out of Lindau am Bodensee on the German/Swiss border com offers 1,877 300b tube products ebay Shop online at everyday low prices!No, 300B tubes weren't designed to pound out heavy metal, rap or techno Shop online at everyday low prices!No . 5W might be more suitable. Hashimoto output iron from a Sansui 1000A receiver. All equipment, technical data, know-how, sub-factories were succeeded. All in stock ready to ship form our Brisbane warehouse. RE: 2a3 and 6B4G amps and tubes - favourites? Posted by Tre' (P) on October 28, 2021 at 11:01:08 In Reply to: RE: 2a3 and 6B4G amps and tubes - favourites? posted by sony6060 on October 28, 2021 at 07:37:44: 3 watts vs. 1 sold. Not true today of course. $172. Furthermore, they do not Re: EL34 triode-tied vs 2A3, 300B ? jan comits 05:07:41 10/16/00 (3) In Reply to: EL34 triode-tied vs 2A3, 300B ? posted by freddyi on October 15, 2000 at 13:31:13: Hi there, I used to have an amplifier with EL34 in triode mode. Re: EL34 triode-tied vs 2A3, 300B ? jan comits 05:07:41 10/16/00 (3) In Reply to: EL34 triode-tied vs 2A3, 300B ? posted by freddyi on October 15, 2000 at 13:31:13: Hi there, I used to have an amplifier with EL34 in triode mode. vs 17W) and have a "harp" filament which comes closer to approximating an ideal planar cathose. 50 Or 6B4G ect . I listen to classical music mostly, along with Brazilian, jazz, and so-called indie rock. Secondary Emission. The Beam Power Tetrode. 5. Sep 09, 2021 · Sun Audio Uchida Model SV-2A3H - Special Edition by 2A3 Maniac and Analog Tube Audio This is the preliminary (happy) end of a very long journey. 95: AA764 Blackface Champ DIY Tube Amp Kit $379. the ST 45. 6b4gといえば銘球2a3のフィラメント規格を変更した同じ古典的直熱3極管です。2a3程ではありませんが、オーディオ用途としては比較的メジャーな出力管として、知名度、人気があります。 流通量も多く、2a3よりも手軽に入手できる真空管でもあります。 The RCA 2A3 was designed as a "double" 245. and 2A3 SE is most good amplifier than any kind of Hi End Amplifier . All KR tubes comes with a 2 years guarentee. Valve Art 300B-C60. 95. The way I was able to spot thermal hum in my batch of 26 and 30 tubes was based on simultaneous scoping of the filament signal and the hum, and when the phase starts lagging, we can proclaim that the thermal hum becomes measurable. If Aric can build a DHT 6A3 or 6B4G with no hum I'll probably be calling him too! Re: EL34 triode-tied vs 2A3, 300B ? jan comits 05:07:41 10/16/00 (3) In Reply to: EL34 triode-tied vs 2A3, 300B ? posted by freddyi on October 15, 2000 at 13:31:13: Hi there, I used to have an amplifier with EL34 in triode mode. They're very epensive these days, sadly. The type 5691 Tube is a "premium" version of the type 6SL7. 6B4G has an octal base whereas 2A3 has a 4 pin UX-4 base There is a valve called the 6A3 which has the same filament characteristics as the 6B4G but is on a UX4 base Modern SOVTEK 6B4G is a single anode tube, and you can easily get it for $70-$80 per tube, or cheaper. When the retired EE friend Dan lived up here, we used to ponder over a push-pull amplifier using a 6 volt indirectly heated triode like 6B4G or others. 6B4G. 35db 0. The 6B4G PP will give you roughly double of the power the SE does. :2014/09/28 . The Quicksilver SET Monos (300B version) coupled with the Lowther PM2a/Medallion speakers offer all of those traits to a very high degree. 3 3. I have always wondered what prompted the engineers at WRL to use the triode 6F6 as a driver. Normalerweise verwende ich die SOVTEK nicht, klingt mir zu. 6 300B 5. 50 ea. Yes that's right, you get to run a tube that is more or less identical to a 2a3 that can be bought NOS for under $200 a pair. I think also that with transformer phase splitter and DHT outputs like the 6B4G in PP with a 417A driver triode Sovtek 2A3 - Platinum Matched Item 2A3SOVPL. 7 300B+ 5. The RJ-563 and DRJ-564 are West- inghouse types, and either would be an excellent choice except for their rela­ tively high cost ($15 and $25 net, each). sound is good like RCA 2A3. I did not listen Sound but rather measure the noise – the result was identical. The Pentode. I guess depend on 6550's plate current made up good sound than 300B SE. I use the DIY based Defisit type using the Tokin SIT as opposed to the First Watt SIT-3 (that uses the SemiSouth SIT). Mar 10, 2008 · I plan to build the 2a3 circuit since I prefer the 2a3 tube to a 300b and don't need the extra power. 3 instead of 2. Large ST envelope, blackplate, blackbase. 00 per pair: 2 pair: ALL 6BM8 / ECL82 triode-pentode tube types, including European, USA types: New old stock in original and . 35db 4,8,16Ω 4,8,16Ω (1. 3 1. Also tests many Western Electric types such as 274A/B, 300A/B, 350A/B Read transconductance directly or use"Good? Bad" scale Tests for shorts and noise . SET experiment on my midrange BG Ribbons. 50, 2A3, 6B4G, 01A, 99, 6L6 etc. teh 3. On top of the rack, from L to R: Sun Audio 2A3, VPI Prime, CJ MV-75. 3) 15 we-66 5. 46. DHT AC Powered Hum Control. 12AT7's 2. a never ending job. 50 12E1 STC 12. My gold standard is still the 2A3, but this project showed me that the EL3N is very close. (very . 30W SE Output Transformer USA HiFi MonoBlocks 300B 2A3 6B4G Universal Single Ended Ultralinear MADE IN USA. 6B4G: Low MU Oxide Coated filamentary heating structure. tubeguru tube amplifier 300B single ended 2a3 211 kondo ongaku f2a Gm-70 6c33c 845 EL156 EL34 KT88 Phono Stage RIAA MINI SE PushPull Interstage coupling cap d ream of all A udiophiles +49 152 54041085 tubeguru @me. distortion vs output at 50 cps. My early thoughts: 4P1L are very easy to match ᐂ10 pcs Haute Qualité En Céramique U4A Or Plaqué 4Pin Tube Socket Pour Audio HIFI Amplificateur 300B 2A3 811 572B 5U4G 6B4G 274 866 PX4 ᐂ10 pcs/lot MCP23S17-E/SS MCP23S17ESS MCP23S17-E MCP23S17 SSOP28 en stock The features, accuracy, and the tests available differ widely by make and model. 00 KT66 GEC 69. In the best cases I was able to get 0. The pinout is shown on the left. Some manufacturers wanted to focus on simple low cost units to find weak or just bad tubes. but lets me show you KT88/6550/EL34/KT77/ Compatible Single Ended Amplifier. The 37-116 uses the 6B4G's which is a 6-volt 2A3 in an octal base. A 6B4G is a 6A3 on an octal base. 68/EACH. The 6B4G is somewhere in between a PX4 and a 2A3. fan tannoy . 1619, 1624: 2. If Aric can build a DHT 6A3 or 6B4G with no hum I'll probably be calling him too! To cut it short, I bought a few bogen commander amp, a fisher integrated amp, philco tombstone and 2-Hammond 40's tone cabinet. azenithnut . 6B4G (Sovtek) (see also 2A3) 6BG6G 6BG6GA . Many have come to prefer the 45, the 2A3 (and its variants, the 6A3 and 6B4G), or the high-powered transmitting triodes (the 845, 211, 833, 811 and other European power triodes). I'm still waiting for Sckott to comment on his PP 6B4G amp. . I have quite high hope towards 6B4G. Other things to look for 6C4C (6B4G type), GS14 (titanium and silicon) one fo the best sounding triodes. 3vの直熱管なんだが。 saddening. US $127. FOR SALE: 1 Vintage Pair Of Kenrad JAN CKR 6B4G Output Tubes Testing As New: Vacuum Tubes - Valves: $100. The new ones arrive in 4 days! My 300B based amps well drive my current speakers even though I do use the system nightly as a 2 channel home theater. Honesty, Availability, and Service Our motto and our promise to you. (could use pse 6B4G ) The power house monoblok version : This is not yet build , just in the design idea I do supply its schematics , the idea is to get lots of power excellent reliability and low cost using standard 300B types and returning to my basic old time philosophy : triode – penthode – triode , with or without interstage . 0ma 5. This is my current favorite and latest build. DC-current. May 10, 2017 - A Direct-Coupled 6V6 Tube Amplifier with Cathode Follower by Raymond H. 50 PX25 KR 128. You never use your VAC amps for that Steve? * The 2A3 Wave: Part One * Sneak Preview: The 300B Karma Sutra Test Procedure * Tesla . T his tube by Valve Art was one of the reasons why this review has taken so long to hit "print". sion type tweeter . 6b4gも2a3のusオクタルベースの6. Anyway, that's why I would go for 6B4G. Electro-Harmonix 12AX7 EH Preamp Vacuum Tube. 3 times bigger than the attachment to the B3 each and inside is a large amp chassis with 4-2a3 and 6B4G x 2 for stereo (Kind of looks like in the picture only bigger). Inquire for more info. 01uf capacitor at input. So, no matching can be done: The previous was a low distortion 6C4C I have. The others range from close to somewhat similar. 00 KT88 JJ 17. - on 2000 manager class employees of Hirata established new ISO-TANGO and resumed production. A roundup of 2A3 tubes. 5ma 4. They also produce some distortion in a class AB circuit un- less matched tubes are used or a bias correcting network is pro- vided. The 37-116X does have variable bandwidth IFs and Philco was known for amazing sound quality. 5 W SE, 7+ W PP) That is not that more punch, I think. 00 805 USA 52. The 6B4 is a type 6A3 on an octal base. EH-12AX7. Gain = gm x Rp = 20,000 x 10-6 x 47 x 103 = 94. 3v filament 2A3); two stage, 5842/417A driver, transformer coupled. The 6A3 is a 6 volt filament version of the famous 2A3 DHT. 4 50 7. The triode strapped 6AV5GA is known to have basically the same electrical parameters as the 6B4G except that it's not a DHT, the sound is apparently quite similar and I happend to really like the 6AV5GA. I live small apartment so good enough to use 2A3 SE with Tango XE-20S Transformer. 2a3,6b4g,vt52 6a3,6bm8 3. 19, 1J6:: 2. 3) (1. Solid-state also became very interesting to him after he was able to get good results with a high-voltage IC driver he designed for his favorite 1619 tubes. 5 pin, 6 pin, 7 pin, Locktol, Octal, Acorn and 7 pin miniature tube Tests most antique type tubes such as 45. $34. Is it done yet? I've been following the thread in the music forum about what hardware Steve uses for casual listening. If one uses a standard traditional amplifier design methodology on this tube, ignoring the unique electrical characteristics of the tube, they would probably end in failure or bad / mediocre sound. Mirror hosted by Marius Baicus. The JJ 6550 is an excellent choice for bass heads, tube organs, and Hi-Fi amplifiers. The use of a single tube in the output stage of the power amplifier is commonly referred to as a “single-ended” design. 2a3 . The Bold listings are shown as equivalents in a tube manual, and could probably be sustituted without any changes other than rewiring (but check dissipation rating for power tubes!). In single ended operation it is good for 3. the cost of the tester. 3V IDH filaments. Or perhaps what Pres. Mirror hosted by SaSG - Jörg Jan Münter. 6 6A3 / 6B4G 6. that thing weights about 250 lbs. I do not own a 15 tube Zenith, so I cannot say. Sound ratings: FOR SALE: 1 Vintage Pair Of Kenrad JAN CKR 6B4G Output Tubes Testing As New: Vacuum Tubes - Valves: $100. 3V indirectly heated cathode. Early single plate 2A3s are a diffrent animal - lower power rating (15W diss. $24. 6B4G, 12E1, 2A3: 6L6G/CV1947: List Price - $415. fax (630) 208-2550. langweilig, aber diesmal war ich angenehm überrascht. ClassicTone # 40-18115, Fender Champ Style, 5W, Single Ended, Output Transformer, 8K Ohm Primary to 4 Ohm Secondary. The beam forming plate is internally . 6DJ8 . With the 2 primary windings connected in series the NP-126 can be used with tubes which internal resistance is between 10K and 20K. I've only had the A1/2 Yggdrasil and L2 Pavane with it and neither will be aggressive regardless of tube choices even going off spec. It's still a gen-u-ine direct-heated filament triode, though. max. 3v版6b4gを使ったステレオ・シングル・アンプです。 本アンプは、図々しくも「無線と実験」主催第7回自作アンプコンテスト(1995年春に開催)に参加し、からくも本選に残りましたのでご存知の方もいらっしゃるかと思います。 @teajay - A 6A3 tube has the same filament characteristics as a 6B4G but is on a 4-pin UX-4 base like the 2A3. EUR 349,00. 50 6550A GE 31. 6FQ7 は、μ=20の中増幅率の電圧増幅双3極管ですが、元々はテレビの水平発振や、垂直発振用のテレビ管です。. T-564, and 300A. However, instead of a 2A3 tube, he used the double plate NOS 6B4G because it has the same electrical characteristics as a 2A3 tube. sound is very tight. 6b4g. Screen grid. Ex. Das Niveau der Fertigteile hatte dieser Bausatz nicht erreicht - trotz peniblem Aufbaus war da der "Brumm" drin. This 2A3 Push-pull amplifier, built in 2009, has proven itself to be an excellent performer. JJ ECC83s / 12AX7 Preamp Vacuum Tube. 00 6BW6 Brimar 5. The 11J-563 has a mu of 3. そこで、6AV5は6BQ6と同じ特性なので、スクリーンに適度な抵抗を入れると2A3に近い特性が得られることが分かりました。. Line-output transformer. The 6B4G is an unusual valve in that the envelope holds two triode valves that are hard wired in parallel. 6L6. 8, a plate resistance of 800 ohms, and a maximum Tests 4 pin. 69 ID:2zkG3FGd. This amp is an OTL and sounds incredible. 0 6. Search: 300b vs 45 tube. 00: ON Mar 26, 2022: 11 : FOR SALE: 1 Vintage Early Pair Of MOV Valve Company U52 5U4G Rectifier Tubes British At Its Best: Vacuum Tubes - Valves: $700. Refined, delicate, detailed. 0ma 120h 75h 85h 60h 6v6,6bq5,6bx7, 6f6,6ac5,6gw8 vt52,2a3,6bm8 6b4g,71a,6l6(t) px-25,ux-50 da-30/px-25a h-30-5s h-30-3. Single-plate RCA 2A3 will go 3-4 times higher, and that is if you can find one. Thus, the later appearance of the "twin plate" or "double plate" 2A3, even after the dark glass, twin plate 6A3 and 6B4 types emerged. 00 ALL PRICES IN U. VAC's Statement 452 iQ Musicbloc amplifier ($75,000 for a single amp; $150,000/pair mono, as reviewed) is tall, young, and lovely, but unlike the girl from Ipanema, it isn't tan. 8. electron Tube Data sheets. This is the first directly-heated triode amplifier I built for myself . I had a DHT 6A3 amp years ago that was very nice but had a little too much hum. hammondmfg. このオークションをみろ!. 2. I would guess that it had something to do with costs and mass production, but in 1948, I would think that 6A3's, 6B4's and 2A3's were all plentiful and cheap. 00: ON Mar 27, 2022 Tube Testing is available except for large transmitting tubes. and, of course, IMHO very well sounding I'm using the 300B, and have already ordered the 2A3. 5V for the end tubes will support rolling of 6A3, 2A3 or 6B4G (with octal socket converters) And continue doing sound character fine-tuning , . 63mV at output – way bayonet of what I need to worry even with 109dB sensitivity. Gerüchten nach kann die SOVTEK mehr Leistung und Spannung ab. The best examples of "earlier is better" apply with RCA 250 GL vs. The Simple 45/2A3 sounds the most musical, SRPP sounds the most detailed but lacked warmth, and Double DC Darling is a good mix of the two. However, there is a lot of information out there on those tubes and I wanted to go a little off the beaten path. Separate heater transformer for the 5842. best to compare data sheets before trying. Direct Reactance Drive Amplifier 14-25* Ultrapath Line Amp, The 10-11* Frankland, Scott. Altec . Of course, I immediately looked up a 6B4G's 27B outline and, despite design needs of cramped chassis space, (2)6B4G's in lieu of (2)12BH7's might fit (maybe lose the reverb feature). + Shipping: US $6.


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