274b tube equivalent. It is a dissimilar double triode, which means it has two independent triode sections with different parameters. 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. 35 audio. Sockets, grid & anode caps, tube boxes LINLAI TUBE Dream Series 7300B-D / 2A3-D / 274B-D / 6SN7-D / 6SL7-D adopts a "droplet" glass bulb 845-D, 211-D, 805A-D adopt a 64mm diameter straight glass bulb, and a nickel-plated iron bracket to fix the tube core. Register now to get updates on Tube Data Sheet Locator. Forums. PSVANE offers us a tube with a more pronounced analog texture than that of classic tubes, with voices more prominent than usual The Emission Labs 274B (The "B" has the pin out of a GZ33/GZ34) looks robust and the mesh plates of this tube I think would look unreal cool in the ST120. Start up arcing reports are all too common. Demo pair: Sophia Has any one tried the new Sophia Electric Aqua 274B tube in their Decware gear? From their website, “Sophia Electric came out with a newly designed Aqua 274B rectifier tube to raise the limitation from 8uf to 47uf. , with a further reason being that some Asian 274B tubes are 5U4G equivalent tubes, while some are not! Even so, Western Electric still wished for a little more high-frequency extension in their WE91 300B amplifier to make the sound more open and lively. Historically, WE 274B was designed for ShuGuang audio tube/hifi tube, WE274 Equivalent to 5U4G 、5Z3 274B 5AR4,eectech. $29. Regular price $49. It sounds pretty close to the brown base. This is absolutely not one of, but just the best rectifier tube you’ve ever heard! Our product 274B is the only one in the world which completely reproduces the engraved Western Electric 274B of 1940s. I purchased 4 60's era 5U3C's for use in my WA6 in years to come. There is also a variant which is technically the same, also has an octal base but a different pinout. To be clear, the amplifer comes stock with 5U4G tubes. 5AR4 shows the following are also compatible, U77, 5U4GB, 5AS4, 5AU4 and 5V3A There is also an antique tube, the CV378 (British) which is excellent. per plate". 5U4G: 450V @ 225mA. WE274B glass enclosure is of slightly smaller size than an average 300B tube. Thoriated Tungsten Filament 274B equivalent rectifier. All will ship quickly once an order is placed. Would like to change the Chinese tubes because both had been "sparking" occasionally a few seconds after the power is turn on. How customer reviews and ratings work See All Buying Options. Critics like to pan it as hyped-up, before introducing their own favourite directly heated triode tube. These 5687 tube - and how to read it's data sheet. thetubestore. The Aqua II 274B features a number of technical innovations: The Aqua II has a higher current output (max 220ma) compared to the original Aqua 274B (max 180ma), and way more compared to the WE 274B (max 150ma). So if I wanted to replace the 5Z4PJ tube with a better quality tube which should Like the 274B the 5U4 also has a 4 pin counterpart which is the 5Z3. I use it in my Woo Audio WA6 headphone amp. 274B tube is a premium rectifier tube for a 5U4/5R4/5AR4* direct replacement with 3X longer plate structure, thus it has a deeper, wider soundstage and even smoother sound than Mullard 5AR4. Such a design allows better reliability & longevity plus lower noise level of the tubes, and provide a ‘blacker’ sonic background. Amplifiers that use the 5U4GB tube or another vacuum rectifier tend to have fewer problems due to over-voltage and power spikes. 0 out of 5 stars. The 6FJ7 is a 12 pin compactron equivalent of the 6DN7. by Valve Art. 5A of current. we also provide factory matched! All the tubes have 15 months warranty! Feature: E-300B, E-274B, and E-2A3 are screens made of permalloy and carburized, with high purity, strong electron emission ability and service life, the tube type adopts the antique "eggplant" shape structure, and the tube The core is suspended in the air Reviewed by Tone Audio (Issue 2) See User Reviews Sophia Electric 274A mesh plate rectifier tube is identical to Sophia Electric 274B mesh plate rectifier tube except 274A is a 4-pin based tube vs. We use cookies to improve your online experience. e. Circuit topology for tube power supply. It was used by the Chinese Military and is much better quality than the currently produced 12AX7 which is a serviceable tube. He started using them with his TAJK 274b which was KING along with vintage WE 274b. 5687 tube - and how to read it's data sheet. 95 . Courtesy of Adrian Wu. By continuing browsing this website, we assume you agree our use of cookies. Increasing the cathode bias resistor is often necessary. The sonic difference comparing to conventional 5U4, 5AR4*, 5R4 is far bigger than any cable upgrades combined in a high-end system. 00. $195. The brand-new Linlaitube 7300B electronic tube, directly replaces the 300B electronic tube screen consumption and power are better than 300B, consistent with the use conditions of various models of 300B, equivalent to the high-power version of 300B electronic tube, with E300B E-274B E-2A3 has a wide sound field, euphemistic and It is also home to Takatsuki Electric Industry Co Ltd. 000 hours Frame Grid pentode produced for German Post by Siemens. Output power: 13W * 2 (ultra-linear connection default) Frequency response: 20Hz-25KHz. 5. 90 $ 643. Currently they only produce two models of vacuum tubes, the 300B and the 274B rectifier. Below is a detailed look at each equivalent and how they compare in terms of The pre-stage part employs a 274B tube for rectification, allowing each channel to achieve an output power of 30W. For a 30$ rectifier this is a larger improvement in my system to my ears than any other rectifier change has made. D. 5+ years of R&D poured in to create this Supreme series and world's first 3D designed tube structure; Patented hybrid plate design - combination of graphite and mesh material first time used at the same time on high power output tubes (845, 211, 805) to achieve synchronized expansion even at 600 Celsius temperature, high emission capacity, and super stability. Note(*): Princess 274A mesh plate tube may require the first stage capacitor (capacito Tube Data Sheet Locator. 5U4G is glass- shell eight- feet directly heated full-wave rectifier tube，5U4G is very similar The Valve Art 274B looks just like a 5U4, but the EML 274B mesh plate is another animal altogether. New posts Search forums Subscribe. 5V Mesh Plate Tubes for 2A3 Tubes: Rectifier :1 x 5Z4P (replaced by 5Z3P, 5U4G, 5Z4, 5R4G, 274B on this amplifier ) Pre-Amp tube: 2 x 6SN7 ( equivalent 6n8p 6h8c) Power tube: 2 xPSVANE HIFI EL34 ( Compatible with KT66, 5581, 6L6G) Output power: 8W x 2 (ultra-linear connection default) Frequency response: 20Hz-20KHz. This is one extremely cool looking tube. Looking at the specs of this EML274 I think the tube would work- Authorized Emission Labs Reseller. "Without the 274B rectifier tubes, Western Electric tube amplifiers sounded rather dark and dull. If the amp was designed to have only one rectifier tube for both channels, then 5U4G is more suitable. 8%. Technical specification: 274B is very similar with 5U4G Tubes for 300B Amplifiers; Tubes for 2A3 Amplifiers; KT88, KT66, EL34 and EL84 Tubes; 845 / 211 Tubes; 6SN7 / 6SL7 / 12AU7 / 12AX7 Tubes; 274B / 274A / 5U4G / 5Z3PA Rectifier Tubes 🎚️Popular 6N1P Tube Equivalents. So let's just say I'm now a big fan of your company. Interested to know which version of this tube is the most popular as a replacement or rolled tube Menu. I also bought a quartet of Telefunken ECC801S diamond. 15 $ 657. I have a couple of them myself. Right out of the box, however, the upper midrange was significantly cleaner. The other potential problem with this tube is that it has an internal connection on pin 1 which can potentially cause problems with some circuits. com has a private-labeled and highly-tested version of the Shuguang 274B. Mainstream rectifier tubes like the 5U4 (America) and 5AR4 (Europe) permit up to 47 uF in the first capacitor position in a power supply, making them Last update of this mirror site: 2024-10-11 Electron tube Type: Brand: System: Data sheet. Bluetooth module is 4. The LS 300 uses (2) 6922 tube drivers and (2) 5R4GY tube rectifiers, to provide a tonal balance that is both bold and refined, dynamic and musical. However there is a catch - the first capacitor after the rectifier tube needs to be small. The R-800i – 805 uses two 300B tubes to drive 805 vacuum tubes for single-ended class A amplification. The Chinese 274B is a 5U4G with "274B" stamped on it for marketing reasons. Others on the other hand revere it as the lighted path to sonic bliss. It was made by a few of the major manufacturers in the US, Mullard in England (M. LINLAI E-274B tube,Lin Lai Elite tube series,audio tube,hifi audio tube (1 piece ) Guiguang tube 7300LX, Equivalent to the original West Electric WE300B (one Pair ) $ 610. Write a review. I posted the same type of things when I upgraded to the Sophia Princess 274b rectifier tube in my Woo WA6 back in 2008. There were about 100 tubes and the only things worth a damn were the three 274B and some RCA 12BH7. Regular price $249. Also TAD 4003, One-day-to 5U4G is glass- shell, 8-pin socket, directly heated full-wave rectifier tube，5U4G is very similar with 274B  and 5Z3P, which can be the price is one pair( 2 pcs) , if you need more. Factory tested . A $1,500 Western Electric 274B might be better made than a $30 RCA 5U4 and hence will last longer, but I can assure you that any perceived improvement in sound quality is a figment of your imagination. Their commercial equivalent is the 6158 which is the special quality version of the 13D3. Last Update: Description Many mistakes are made with the power supply, causing the amplifier to hum. Yes to the Sophia 274B being the single rectifier tube, lol. This Aqua 274B can directly replace 5U4G in most amplifiers with great sonic improvement. Like Dislike. I favor these over every 5U4 varient except 274B! If you can use 5Z3 I also like early Cunningham and Sylvania green leaf -- still the 422A is simply in a much higher league! -- you will not ever regret owning this wondeful tube. 5U4 Rectifier Tubes are in stock and ready to ship! I have read recently that a few members have purchased the Takatsuki 274B rectifier tubes with rave reviews. Mainstream rectifier tubes like the 5U4 (America) and 5AR4 (Europe) permit up to 47 uF in the first capacitor position in a power The Russian NOS 5U3C is an excellent Rectifier tube! IMO. Others like PSVane are around $250. atop_authentic_auction (49,240) 99. Newsletter. Finally, the Kron 5u4g has MUCH higher internal Allaerts, DaVa field coil reference with tube PSU, One pair of Altec 802g drivers for the top half of the Altec 817 speaker, with two pairs of Altec 515B 15 inch woofers. Register now to get updates on promotions and coupons. Right now I'm running 5U4GB's by Electro-Harmonix. I was hooked on the SE 274B when I saw that Woo Audio was offering the 274B as an upgrade to their WA6 headphone amplifier. If you can source NOS GE This tube will substitute for all types of 6L6 except for the 6L6GC, KT66, or 350B. 1. 1 (30 votes, average: 3. Instead, it means the bulb produces as many lumens as a 60W incandescent, which is 800 lumens. The TA-274B rectifier tube is our second made-in-Japan audio vacuum tube we developed by maximizing our technologies and knowhow accumulated in the creation of the 300B. IMO. WA5-LE (1st & 2nd gen) WA5 (1st & 2nd gen) WA33 [Standard and Elite Edition] WA23 LUNA. Posted on January 28, 2014 by tubemaze. com. 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. with Sophia Electric 91-01 300B mono-block amplifiers First impressions on Aqua 274B and Classic 300B. Some of the equipment on which this valve is recommended to be used: - Audio Note OTO LINE SE (274B sub) TUBE FULL WAVE RECTIFIER POWER supply NOS. , ) all over the world, it is very beautiful from both inside and outside, tribute to the Centennial Classics; Benefit from “No matter how great those 274B tubes sound, this capacitor requirement limits 274B applications, just as it did for the original Western Electric 274B rectifier during the golden age of vintage vacuum tubes. Last Update: By Jac van de Walle Introduction. Vacuum Tubes Rectifiers 5AR4,GZ34,274B,5U4GB etc. EUR 20 for each tube So far you fellows have gave the confidence to try the sohpia 274b tubes and that was a good choice. is about the 274A and 274B, which only difference bewteen those two is the tube base. What's new. 274B is a high-performance rectifier tube, which adopts special cathodic electrophoresis process. I installed a new 274B tube and the high voltage delay time protection circuit board they sent me. 5, I believe RCA (who invented the octal base) specified that, while fewer than eight pins could be included, there should be at least five for 274B Western Electric Vacuum Tube High Fidelity Characteristics The current-voltage characteristic of a single diode unit Of the 274B tube Vs shown in figure 3. Enter the Sophia 274B, ST bottle, solid plate rectifier tube. Promoted Threads. Free shipping on many items | Browse your favorite brands | affordable prices. Linlai™ Global D Series (aka Dream Series) is the newest addition to the Linlai™ tube lines in 2022. First question: what do all the letters and numbers in a tube mean? Second question: I have heard that these two tubes (5u4g and 275b) are interchangeable. Plate has a bigger diameter at the base. #2 2016-01-19 3:58 pm #2 Both Russian and Chinese ST bottle 5U4 "equivalents" SUCK. NOS 5U4GB According to this page, the 5Z3P, with the 5Z3PA being listed as "sensibly equivalent", is listed as a "modern version" of the 5Z3, and has an octal base with the same pin out as the 5U4G and its ilk. , with a further reason being that some Asian 274B tubes are 5U4G equivalent tubes, while some are not! Sophia Electric™ 274B tube is a premium rectifier tube for a 5U4/5R4/5AR4* direct replacement with 3X longer plate structure, thus it has a deeper, wider soundstage and even smoother sound than Mullard 5AR4. 20 Along comes the 30$ 274b which is about the same price as the nos 5u4. The design goal for the LS 300 was to provide the beauty of tubes, whilst maintaining a neutral sonic signature. Britain is the direct equivalent of 274B 5U4G CV575 Go and see the doctor: Find all of our products here: our newest product line of high-end Redbase tubes, our famous premium selected tubes, and the equipment we manufacture like our Class A Converters, the Bias Master or the Silencer. HenryS and jonwoody like this. They feature 30mm tall, heavy grey (rather than the later black) plates and are of the earliest / first generation of the 422A. Epay for the WE tube, they bring The maximum current capability for Sophia Electric 274B mesh plate tube is 90ma, suitable for tube pre-amp. The max value allowed for the Princess 274B mesh plate is 4uf, or 8uf for the Princess 274B rigid plate. 97 $ 29. These are the 274B in question, seems similar to a 5AR4 Preferred Series 274B / 5U4G Rectifier Tubes - www. 5A which is lower than the 5U4G/GB or 5Z4P which would 5U4G rectifier tube made by old Svetlana The 274 comes in two flavours, The 274A and 274B. USD $‎79. Each TA-274B tube is manufactured and assembled with choice materials and stringent quality control. 9 Products Preferred Series 274B / 5U4G Rectifier Vacuum Tube (7 Reviews) USD $‎39. By continuing 1. 5“D (Height depends on rectifier tube) Dimensions: External Supply = 8“W x 4. end quote! Reactions: RUmad. From the United States Dimensions: Preamp = 17“W x 8“H x 12. The 274B requires a filament current of 2. NOS 5U4G / 5AS4 Rectifier Vacuum Tube No Reviews yet. Its sleek, minimalist design not only complements any home audio setup but also prom Perfectly matched pair from December 1957. New & NOS power tubes from Electro-Harmonix, Genalex, JJ & other US made tubes! Email Password Confirm Password Tubes: Rectifiers - USAF "Mighty" 596 w/ Woo Audio Adapter | Sophia Princess 274B Mesh | KR Audio 274B-HP | Takatsuki TA-274B | Emission Labs 274B | Emission Labs 5U4G | KR Audio 5U4G "Riccardo Kron Anniversary Edition" | 1957 NOS JAN Sylvania Ruggedized 5931/5U4GB | Tung-Sol 5U4G B TUBE FULL WAVE RECTIFIER DOUBLE A CV378 tube, equivalent to a GZ37. While the 274A came out with a 4 pin UX4 base, the 274B was later introduced as well with an 8 pin Octal base (of which only 4 pins are used). The indirecting 5AR4 may turn on slower, however, people who buy 274B is for its superior sonic performance. Get the best deals on Western Electric 274b when you shop the largest online selection at eBay. FREE delivery Thu, Apr 4 on $35 of items shipped by Amazon. The 274B is Western Electric's equivalent for the 5U4G/5AR4. Or sell the old on Ebay, I have seen people pay 150 Euro there for a used tube. Easy Order on-line of EMLs exceptional selection of Rectifier Tubes, Power Tubes and Driver / Preamp Tubes. ECC88 / 6DJ8: Shares similar pinout and characteristics but differs slightly in transconductance. 50 for premium tested tubes, tested under load to deliver 120 ma. Still I would try to find an old tube guy that knows this piece and can verify tube subs before proceeding. Direct-voltage output characteristics as functions of the direct load current Hello, Finally decided to plunge into the vacuum (tube) world and trying my luck at building an amp. External Supply = 17 lbs. Once the mistakes are made, it is often impossible to localize them in the power supply, and you'll be looking everywhere at the wrong place, and not find where the hum Hi all, I picked up one of the Reisong A10 tube amps and so far so good. 19. legs different WE integer . (However, changing to a different tube type altogether, like a 6FD7 or a 6SN7 with adapter Description This Data sheet. Historically, WE 274B was designed for the WE300B amp, the current NOS WE 274B is $1000 each unit (see Vacuum Tube Valley magazine), the used one can be as high as $500 Philips 5R4GYS rectifier tube vs stock China 274B (Read 1802 times) Rraymond. The Holy Grail of rectifier tubes, this original Western Electric 274B replaces any 5U4G, GA or GB, as well as any 5R4G, GY, GA, GB, or WGB. ga('set', '&cu', 'EUR'); ga('ec:addImpression', { 'name': 'TAD 5U4G REDBASE PREMIUM SELECTED', 'id': 'RT512', 'price': '42. ” PSVANE's 274B-Z rectifier offers a soft, warm sound, full and natural, with good balance and no background noise. Ernstmach. Welcome @ Frank's; electron Tube Data sheets Elite tube series-----High quality/high taste/independent research and development. I prefer indirectly heated types (5AR4/GZ34) if the circuit is willing. I bought the U52 out of Australia back in the early 1990's when they were "only" $50 I think I paid around the equivalent of EUR 12 each. (PSVANE or Shuguang , depend the production period) Rectifier: Chinese 5Z3P x1 (equivalent by 5u4, 5r4g, 274B, 5z3p) Power transformers: 0. The Sophia Electric claims to be "for those who want 5U4G rectifier tube without missing 274B magic. 4tubes. I'm in love with the Princess Sophia. The 5U4 was made by all the major tube manufacturers and is still being made today among others by ELROG. ALWAYs check the bias and idle power of the tube with the new rectifier to be certain that it is running within spec. Please click this link here for the data sheet, and briefly read the 8 pages, particularly PAGE 2, 3, and 4. The LINLAI WE replica 274B follows exactly the same design of the original Western Electric 274B. LS300 Tube Pre-Amplifier. As for why 4 pins vs. Here's the list of the most common guitar amp rectifiers in order of most to least clean headroom (highest to lowest voltage output) and least to most sag: They're all interchangeable within limits. I asked him to roll in some rectis the DHTs break in and low and behold the cheap Chinese A superb tube! The Sophia Princess 247B has a huge soundstage and reproduces timbres accurately. tested tubes; $14. I am intrigued by the Magik Box and Hello I had the same problem as @CohibaJoe with my Willsenton R300, but in my case after some days listening to it one of the 274B tubes had a clear purple flame when I turned the amplifier on and the fuse was blown and the amplifier was dead. Its equivalents include Western tubes such as the EL84 and 6BQ5, as well as specialized variants like the 6P14P-EV and 6P14P-K. Like any high-end Japanese product, the Takatsuki comes in exquisite packaging with the tubes packed securely in a wooden box, full literature on the product including individual test results from their Amplitrex tube tester. The D series tubes have tube internal plates coated with Purified Titanium to absorb escaped gas elements during tube operation. The price point of the Tak 274 is well over a thousand dollars. QSA Lanedri TubeDepot carries a selection of 2A3 / 6A3 / 300B Power Vacuum Tubes. Meets all 274B standard electrical specifications . Most commonly used in guitar tube amps and home audio tube amps. Note(*): 274B is direct heating tube. Timeless in every way. 99 Sale price $49. tube vacuum tube ps van control number [PP0009C5] Yahoo Auctions Auction bid ¥16,000 Oct 18, 2024 Yahoo Auctions Western Electric Western electric 274A 2 ps new goods 274B. These SIEMENS D3a / 7721 High transconductance long-life > 10. References: Data-sheet & 1040 . Multiple sets of fully balanced XLR The Takatsuki TA-S01 stands out in the realm of tube power amplifiers, blending traditional Japanese craftsmanship with modern audio technology to deliver a warm, enveloping sound that captivates audiophiles and casual listeners alike. Lampizator uses them in all its equipment designs. Brand New. 99 Sale (GTA equivalent) Tube. 5Z3P vs 5U4G vs 274B. I'm currently using the GZ34 and have used or more than 4uF on a 274B tube, such a schematic is questionable. The TA-274B rectifier tube is our second made-in-Japan audio vacuum tube we developed by maximizing our technologies and know-how accumulated in the creation of the 300B. Good luck with your search. This after trying, and I'm not exaggerating, at least 30 different rectifier tubes in my Lampizator DAC. There are other higher dollar tubes that are likely better but I am The 274b is a more lively tube in my experience and the Mullard GZ34 has a better mid range. What makes them so I'm looking to replace the two rectifier tubes in an Audio Note Kit Mentor L5 preamplifier. * Fully regulated low impedance 807 tube screen grid B+ power supply * Fully regulated low impedance input tube driver, 6922, B+ power supply * Precision non-inductive metal film 3 watt resistors * Paper and oil filed, epoxy encapsulated, coupling and by-pass capacitors * Gold plated copper output speaker posts * EE Teflon silver stranded 19 Find many great new & used options and get the best deals for Western Electric 274B- Vintage Tube at the best online prices at eBay! Free shipping for many products! I found bliss with a GEC u52--which is not a direct equivalent. 90. Home. 18 Euro one. $173. U52 Osram make Made in Gt. Aqua and WE 274B tubes would deliver 150ma-160ma of current at 430vDC per 274B tube. According to a recent test, this Sophia Electric™ 274B tube outperforms the NOS WE 274B by higher current capability, which translates into better bass, dynamics, and deeper soundstage. Just listened to it. Western Electric MATCHED PAIR LIQUID, RICH, FULL SOUNDING! There exists three 4-pin types that are electrically identical to octal types, type 80 is equivalent to 5Y3-G/GT, types 5Z3 and 274A are electrically identical and interchangeable, and both Tube 274A or Röhre 274A ID25398, Full-Wave Vacuum Rectifier, UX-Base (4 Pins (2 thick, USA 1924, UX) and Power-supply shown. Vintage_Collector6 Need to break her in more, but the a/c to d/c conversion is very clean and reveling. Here are some of the closest equivalents: 6922 / E88CC: A popular substitute in hi-fi audio systems, but the 6922 has lower filament current. This 274B vacuum tube's filament draws 2. Ernstmach Posts: 98 Join date: 2015-08-30 Location: The Great Mitten. . There seem to be many choices. Thus, we elected to rename it as the Aqua II version of the popular original Aqua blue glass 274B rec. The LS 300 represents our new Fully Balanced Reference Tube preamplifier. The respective pinouts can be seen on the left. Here is a bit of info on the 274B: Emission Labs Radio Museum Data on the 5U4G: Duncan Amps. Reviews of 5u4 vacuum tubes and equivalents. The 3-dimensionality of tubes is celebrated, along with controlled bass and refined All I do know is that when you buy an R800i, it comes with a tube that is labelled as a 274B, when in fact it is not a 274B tube, but a 5U4G spec'd tube. Both share the same technical specs but have different bases. Feb 8, 2013 #1 Hi all surge. Jul 24, 2016 So please kindly send me a PayPal invoice for another set Aqua 274B tubes. 35, stacked thick 60MM (96-60). Description This Data sheet. " Thanks for your response but it doesn't answer my question. Psvane WE274B tube, matched pair. Sign in to filter reviews 3 total ratings, 2 with reviews There was a problem filtering reviews right now. Tube 6Z5P or Röhre 6Z5P ID46953, Full-Wave Vacuum Rectifier, Octal (Int. The latest Sophia Electric design and production of this premium 274B rectifier tube was originally planned for Sophia Electric’s 20 Year Anniversary in 2021, but due to the Covid-19 pandemic, this product was delayed. On Sale Now! - 20% Off Retail On I swapped the Valve Art 274B rectifier with a NOS SED Winged-C 5U4G, swapped the 6N1P with a Russian 6N2P, swapped the SV83 tubes with thetubestore Preferred Series 7189 Tubes: Rectifier: 1 x customized mona 274B (Replace by 5u4G) Preamp Tube 2 x customized mona cv181 (Equivalent 6N8P, 6SN7) Power tube: 2 x PSVANE HIFI SERIE KT88. My experience, but like all audio, it is a matter of opinion. Historically, WE 274B was designed for the WE300B amp, the current NOS WE 274B is $1000 each unit (see Vacuum Tube Valley magazine), the used one can be as No matter how great those 274B tubes sound, this capacitor requirement limits 274B applications, just as it did for the original Western Electric 274B rectifier during the golden age of vintage vacuum tubes. They sound very much like the GE NOS long plates 1960's. After reading the responses that were given, I feel a lot more comfortable with putting a 274b in place of the The Preferred Series 274B rectifier tube is a full-wave rectifier that is very similar to the classic 5U4G. Like any high-end Japanese product Guitar Tube Amp Kits; Bud Guitar Tube Amp Kit; Classic British 18W Tube Guitar Amp Kit - 1x12 Combo; Classic British 18W Tube Guitar Amp Kit - Head; Classic British JTM45+ Tube Guitar Amp Kit - Combo; Classic British JTM45+ Tube Guitar Amp Kit - Head; Tweed 5E3 Vacuum Tube Amp Kit; Tweed 5F1 Vacuum Tube Amp Kit; Unassembled Mojo 1965 AB763 Enter the Sophia 274B, ST bottle, solid plate rectifier tube. I dunno if I'd call it a benefit, but the 274B will lighten your wallet (and last forever). According to the Tube Substitution Handbook the following tubes can be substituted for each other. 5 volt 300b. Presently running a modern tube and like it a lot. I ran a brown base with the cup style bottom for 5 years-- I’m sure there is still life in the tube, but I tracked down another--purportedly never used, black base- which as far as I can tell (open to more info) may be an industrial tube. I replaced the stock Sovtek 5U4G with the Princess 274B meshplate, and the difference is quite noticable - particularly the soundstage (bigger), and dynamics. 99 Sale price $199. 274B is an 8-pin octal-based tube. If you can find Russian NOS equivalents, for the WA33, they would be a great choice. Philips 5R4GYS rectifier tube vs stock China 274B 04/10/16 at 20:40:21 . with a SU4G equivalent of Russian Manufacture 5U3C. New posts Latest activity. 00 was - US $208. You can use it as a sub for the 5881 or 6L6GC as long as the plate voltage is kept below 400 volts. As the only one modern audio vacuum tube which with retro-onion glass shell styling (Acme 300B, 274B, 2a3, etc. ModWright Instrument LS300 Tube Pre-Amplifier The LS 300 represents a new Reference Standard for ModWright in a fully balanced, dual mono, two box, tube preamp design. This is the price of one . **Note: I use Voskhod 6N23P tubes w/ adapters in my WA6. and am blown away at the improvement over other tubes. " In other words, I doubt its really a proper 5U4G. This current draw makes it acceptable for many amps originally designed for a I believe an RCA 5U4G is worth exploring. Heirloom Quality Tube Equipment. Presenting the new LS 300 Balanced Tube Preamplifier, featuring outboard supply and dual mono construction. When you see that, all I can say, wow THAT IS TUBE TESTING!!!! Comparing this to JJ data sheets of for instance ECC82, where they cut out virtually everything which is not necessary to mention, this painfully shows The last verion of this tube had silvered gettering. For 5AR4, subs listed are GZ34, 52KU, 54KU, GZ30, GZ32, GZ33, GZ34, GZ37, R52, U54 and U77. The Aqua 274B rectifier is a beautiful sounding tube period! The TA-274B delivers the ultimate vacuum tube quality that only Takatsuki Electric can offer. The ART series are supposedly their top-of-the-line tubes and the prices are pretty high and sold only as matched pairs. I'd like to try the new ACME 274B tubes in place of the current 5U4G tubes in my Line Magnetic 210IA amplifier IF the former is compatible with the latter. ELROG 274B Rectifier Tube. Umbilicals: (2) 4 ft. I would have a hard time paying these prices! My 274B tubes came in a big lot of mostly worthless TV tubes for $50 at the Rose Bowl swap meet about 15 years ago. Full Member; In addition, when changing to a higher output rectifier in a "self biasing" (aka "cathode biased" amp, eg, Champ and others) never assume that the power tube(s) is/are safe. Output transformer core: new imported dedicated 0. It comprises a dual triode ECC83S and two 6SN7 signal amplification and driving tubes. That is the 5X4. Every amp and each type of power tube has different limits so there are no general rules that Hey All, Any tips/suggestions on how to modify (if needed) this power supply to take a 274B rectifier instead of 5U4G. They were "extremely expensive" at approx. " The Aqua II has a lower impedance than any other 274B ever made, thus higher efficiency in converting AC into DC. 8', 'brand': 'Tube Amp Doctor GmbH 🎚️6P14P Tube Equivalents. tion or characteristic is required of a tube, we shall be glad to recommend a sÚitabIe type and to suggest design and operat- ing precautions necessary for realizing the capabilities 274B 275A 276A 279A 281A 282A 283A 284D 285A 287A 295A 297A 298A 298B PAGE CODE 300B 301A 305A 306A 307A 308B 309A 310A 310B 31 IA 312A 313C 313CA 313CB Open Box: Sophia Electric Aqua II 274B Rectifier Tube with Live-Like Sonic Performance. A spendy replacement, to Compared to the industry standard rectifier tube, namely the RCA 5U4G tube, the 274B offers much lower power supply impedance; thus, it has a better resolution and high frequency extension. 274B (5) 284 (3) 2A3 (9) 30 (2) 300B A week ago I decided to take a chance and replace the phono stage rectifier with a Sophia Electric Aqua II 274B. As with the other 274B tubes, it might not be compatible with all 5U4G amps, The 5U4 rectifier tube is also known by the equivalent part numbers 5U4G, 5U4GA, 5U4GB or 5AS4. Apparently, this is a fairly fragile tube (electrically Try NOS GEC equivalent. Such devices would provide the high tension (HT) rail for small radio transmitters, high power audio amplifiers, and modulators for amplitude modulation (AM) transmitters. $252/quad PSVANE KT88-T3 KT88 ART $200/pair The wide glass tube envelope is 32 mm in diameter and, excluding the IO base pins, is 72 mm tall. Rectifier tube: Psvane 274B-T2 Psvane Reference T-series Mark 2 274B is very close in all spec details to 5U4G, 5Z3P and even 5AR4/GZ34. As Gadget says, the 5U4GB will be more reliable with a higher current. Thus, Sophia Electric elected to rename it as the Aqua II version of the popular original Aqua blue glass 274B rectifier tube. Volunteer; Posts: 20315; To whom more was given more will be required. I use Sophia I've been told that I could replace my 5AR4/GZ34 Rectifier tube with a 274B as a direct replacement in my Pilot 505 amp? While the pin-out is compatable, comparing specifications indicate that the max current & voltage capacity of the 274B is slightly less then Solid B+ is a good thing in hifi amps, but possibly not so much in a guitar amp. They are at the price point that intrigues me. Do not oversize capacitor C1, this will not give better results. Psvane finally released some new tubes, their high-end ART series. Videos. MELZ 1578 machine-gun plates (6sn7 equivalent) circa 1950s. Filament Voltage: 5 V Filament Current: 2 V Peak Inverse Voltage: 1500 V Peak Current per Plate: 675 mA DC Output Current (L-Input): 225 mA Tubes: Rectifiers - USAF "Mighty" 596 w/ Woo Audio Adapter | Sophia Princess 274B Mesh | KR Audio 274B-HP | Takatsuki TA-274B | Emission Labs 274B | Emission Labs 5U4G | KR Audio 5U4G "Riccardo Kron Anniversary Edition" | 1957 NOS JAN Sylvania Ruggedized 5931/5U4GB | Tung-Sol 5U4G B TUBE FULL WAVE RECTIFIER DOUBLE AN-02. New posts New media New media comments New profile posts Latest activity. Any specific tube Re: 5ar4, 5u4g, or 274b?? « Reply #1 on: 27 Jan 2011, 02:06 pm » Don't know about 274b but be aware that 5u4 may not be a direct sub for a 5ar4. "5AR4 or it's european equivalent GZ34 is what is needed. GR150-DK. The equivalent to 274B are the 5R4-GY and the 5V4 and 5U4GB is a little bit more stout than the 5U4G and can be substituted with no problems. This demand called for a premium long plate rectifier tube, now known as the WE 274B tube. This is why in the R800i handbook, a 274B is NOT listed as a replacement tube. A double triode with the same pinout as ECC81/2/3 with specifications between 12AU7/ECC82 and 12AT7/ECC81 . Don't use this tube unless you know that the circuit can handle it. In the box. 8', 'brand': 'Tube Amp Doctor GmbH I've really been impressed with the premium Sophia Electric EL34-ST, KT88-ST, and Aqua 274B blue glass vacuum tubes that Sophia Electric Aqua II 274B rectifier 4 Western 300B 2A3 6SN7 5U4 tube amplifie. There is no any compromise in every procedure, including the material, structure, technology, and sound performance etc. For example, when you see the phrase “60W equivalent” on an LED light bulb, it doesn’t mean it consumes 60W. 12AX7 Beijing is a Chinese 6N4 NOS tube equivalent to a 12AX7. I think that is because exceeding the data sheet limits doesn seem to do any harm, and also the tube doesn't get really hot from this. 52. The magnitude of the placebo effect is positively correlated with cost, which is why many Purchase Russian 6N2P-EB / 6AX7 vacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. 1pc LINLAI WE274B Western Electric 1:1 Replica Vacuum Tube 274B 5Z3P 5AR4 5U4G. Radio tubes are valves. Octal, IO) K8A, USA 1935 and Power-supply shown. Stereo 300B tube amplifier needs to have one 274B rectifier tube per channel, two 274B rectifier tubes for two channels. GR150DK is the same The pre-stage part employs a 274B tube for rectification, allowing each channel to achieve an output power of 30W. Weight: Preamp = 30 lbs. " Sophia Electric Aqua II 274B tube x 2. Free shipping. SKU: E274B Category: E-Series (Flagship) Brand: [Linlai™ Global] Description Additional information The 300B vacuum tube must be one of the most talked-about vacuum tube models, especially in Asia. NOS WESTERN ELECTRIC 274A Full-Wave Rectifiers MATCHED PAIR Tubes AMPLITREX TESTED D-GETTERS. 274B Vacuum Tube Rectifier Replace 5AR4/5Z3P/5Z4P/GZ34 Factory Test And Match (Color : ShuGuang audio tube/hifi tube, WE274 Equivalent to 5U4G 、5Z3 274B 5AR4,eectech. Just popped one in my 26 preamp and I have to say, it's the best sounding rectifier I've ever used in there, and I've tried 5AR4, GZ33, 5R4GY, 5R4 potato masher, 5U4G, 5U4GB, 6106, 5Y3GT, 5Y3G, and Valve Art 274B. Is this true, or do the extra letters and numbers mean something that would change that? Any harm in doing so? Tube veterans please help Go and see the doctor: Find all of our products here: our newest product line of high-end Redbase tubes, our famous premium selected tubes, and the equipment we manufacture like our Class A Converters, the Bias Master or the Silencer. ShuGuang audio tube/hifi tube, WE274 Equivalent to 5U4G 、5Z3 274B 5AR4,eectech. 90 out of 5) Even so, Western Electric still wished for a little more high-frequency extension in their WE91 300B amplifier to make the sound more open and lively. Opens in a new window or tab. These tubes feature 17mm charcoal black anodes, copper grid posts and ring Valve Art 274B Vacuum Tube. For ultimate filtering, with oversized components, you will have best results by increasing the choke. This tube has 5 holes drilled along the plate which makes the plates look like a machine-gun, hence, its name. I have to say the EL34 tubes do sound different than the 7591 or 6P14P-ev I've been using, but there is alway's room to improve tubes. Looks like there are three series of linlai 274b tubes. What a difference! As a brand new tube, I expected the Aqua II to take some time to get comfortable. The take are supposed to be exceptional but I just don't want to spend that much that is why I bought the sohpia electric [毒海浮沉]Acme 274b整流管 效果立竿見影｜兩聲道｜中文字幕試完貴族之聲ACME 211 805同274B之後，發覺274B最抵用，因為只要用一支，平好多，但係又試 Have tried 5 different 5U4G / 274B types in my amps, never heard any difference. The TA-274B delivers the ultimate vacuum tube quality that only Takatsuki Electric, the one and only vacuum tube manufacturer in Japan, can offer. 2version chip. Industry Participant; Posts: 3888; 5+ years of R&D poured in to create this Supreme series and world's first 3D designed tube structure; Patented hybrid plate design - combination of graphite and mesh material first time used at the same time on high power output tubes (845, 211, 805) to achieve synchronized expansion even at 600 Celsius temperature, high emission capacity, and super stability. We have been doing more work with fully balanced designs, using the 6dj8/6922/7308 family of tubes and Lundahl transformers. Output Impedance: 4 - 8 ohm. It wasn't that the overall sound had become leaner Pramp tube: 6J8P x 2 ( Equivalent 6SJ7) Power tube: EL34 x 2. com Power supply schematic: Legend - Album on Imgur Thanks! Jeff The 5U4 rectifier tube is also known by the equivalent part numbers 5U4G, 5U4GA, 5U4GB or 5AS4. Oddly enough, the Prompt tube substation handbook says 5AR4 is sub for 5U4G, but not the other way around. Type GZ34 was first introduced in 1954 . When you see that, all I can say, wow THAT IS TUBE TESTING!!!! The Takatsuki TA-S01 stands out in the realm of tube power amplifiers, blending traditional Japanese craftsmanship with modern audio technology to deliver a warm, enveloping sound that captivates audiophiles and casual listeners alike. The text material has been 274B 275A 276A 279A 281A 282A 283A 284D 285A 287A 295A 297A 298A 298B PAGE CODE 300B 301A 305A Our product 274B is the only one in the world which completely reproduces the engraved Western Electric 274B of 1940s. 99 Sale. Compared to the All I do know is that when you buy an R800i, it comes with a tube that is labelled as a 274B, when in fact it is not a 274B tube, but a 5U4G spec'd tube. Quick, free, online unit converter that converts common units of measurement, along with 77 other converters covering an assortment of units. The current production EH 5U4GB (straight bottle) is quite OK. 84 - 21. The 6N1P can be swapped with other tubes in certain circuits, depending on the application. Apparently, this is a fairly fragile tube (electrically Open Box: Sophia Electric Aqua II 274B Rectifier Tube with Live-Like Sonic Performance. The 6P14P tube is a versatile Russian-made pentode widely used in audio applications, particularly in vintage and modern amplifiers. This is absolutely not one of, but just the best rectifier tube you've ever heard! Our product 274B is the only one in the world which completely reproduces the engraved Western Electric 274B of 1940s. The pre-stage part employs a 274B tube for WESTERN ELECTRIC ELECTRON TUBES— GENERAL BULLETIN FOREWORD his bulletin presents in concise tabular form the essential data on Western Electric electron tubes, which are designed by Bell Telephone Laboratories. this tube sounds wonderful. Each. The site also includes a predictive tool that suggests possible conversions based on input, allowing for easier navigation while learning more about various unit systems. This is Thomas Mayer's blog about vacuum tube audio, to share updates about new amplifiers and preamplifiers and ELROG vacuum tubes. 97. If you can use 274B, try the cheap Chinese Shuguang 274b. RAYTHEON [USA] N5U4GRYHB. These are under $30 each, and A problem caused by directly heated or filamentary cathode rectifiers is known as cathode stripping. SIEMENS D3a / 7721 High transconductance long-life > 10. Verified purchase: No According to the Tube Substitution Handbook the following tubes can be substituted for each other. Brand New · Psvane. It is recommended by Western Electric for their 124B amp when a WE 274B tube is not available. Stay From custom transformers , custom 4 layer PCB, 17 separate power circuits, completely insane music conversion topology, customized muting solutions, our proprietary firmware and software, the chip that probably nobody else is using in the industry at the time of writing, new tube scheme, new tube selection, TRP (tube rolling paradise setup Today I was looking for references on the tube 6BL7 and your page appeared in which you give some information about this valve. GZ34, 5AR4, 52KU, U54, GZ37, and U54. Seasoned Member Posts: 210. The power transformer gets slightly warm to the touch with the output transformers almost at room temperature. datasheet is on www. obviously other brands might be a better fit depending on what amp circuit you build. Interestingly, changing the 6DE7 tubes to different brands of 6DE7 didn’t have as big of an effect in the sound as changing the rectifier did. " "Without the 274B rectifier tubes, Western Electric tube amplifiers sounded rather dark and dull. It is available as a Shuguang tube, too, I think, but with Tubestore you can be sure. We stock 274B, 300B, 300B XLS, 520B, 2A3, 45, 5Z3, 5U4G and PX4. Our friend Art Audio is using Sophia Electric™ 274B in the Art Audio PX-25 amplifier. This is not a cheap tube, but it is much cheaper than a Western Electric equivalent. Well, by chance I have that valve installed in a DIY project. I installed a new 274B tube and the high voltage delay time protection circuit board they sent me T5EE 5pcs Quality Ceramic Tube Socket 9PIN Tube Socket 9-Pin Vacuum Tube Socket for 12AX7,12AT7,12AU7,ECC83,ECC82,E88CC 6922 C$16. Power transformer: 105*60 240W A vintage strong low hrs single WE 422A rectifier tube This tests very strong over 115% of new performance inspected on both a calibrated TV7 & JAckson 648S at full load 1st Generation grey plate dating from November/ December 1950 This tube features all of the performance and amazing quality of the The 422A was introuduced in the late 1940s as a octal based Rare and hard to find vintage rectifier tubemade in 1940s during world war 2 . I showed the specifics of the tube to my buddy who came up with both the pre circuit and the phono stage circuit and he says don't worry, run it. Used Unit: Sophia Electric Grade A Clear Glass 6SN7 (GTA equivalent) Tube. It is not known what type number was used for the Philips tube. Guiguang tube 7300LX, Equivalent to the original West Electric WE300B (one Pair ) $ 624. Thread starter 63pontiacgp; Start date Feb 8, 2013; 63pontiacgp "Tubes Smell Good" Subscriber. I might not understand there website but which one did you get? I find ot really neat that so far you are enjoying them. These sounds good to me - but can we do better? (no particular order): *1* Emission Labs / 5U4G *2* Sophia Electric / Aqua II 274B *3* Sophia Electric / Aqua 274B *4* Linlai / Global 5U4G *5* Linlai Design Considerations for a 5U4G or 274B Tube Power Supply, using a Choke. Post The wide glass tube envelope is 32 mm in diameter and, excluding the IO base pins, is 72 mm tall. The 422A was introuduced in the late 1940s as a potential replacement for the aging 274B. Register now to PSVANE 274B integer . The EML tubes feature a series connected filament for both diodes togetherm, which has certain advantages. It is a heavy glass, large plate 274B with a lighter 5ar4-like filament current draw, and has much harder vacuum than the basic Shuguang tube. Sophia Electric Princess 274B mesh plate This is a current production 274B rectifier offered by Woo Audio as an upgrade to the stock tube. It would be a shame to ruin it. knockbill Lunatic Member. Guiguang tube 7300LX, Equivalent to the original West Electric WE300B (one Pair ) $ 610. up for sale ELROG (ER274B) , replace Western Electric 274A/B and work well 5U4G tube equivalent this is new release 2020 tube from Elrog ( quality fixed with new owner) spec : 5V, 2A, peak inverse V= 1500V, peak current per plate 675mA, this is hell of a tube with souding best at top tier compare to WE 274B, Elrog dealer just honor warranty Chinese Psvane WE274B. umbilicals with 8-pin Switchcraft connectors. Perhaps the rectifier circuit is the most misunderstood part of a tube amplifier. Given such a big sonic advantage of 274B over RCA’s 5U4G, it begs the question of why the WE 274B did not get used more in other amps and preamps. Thoughts/experiences also with Any benefit of rolling rectifier tube? Mike. Go and see the doctor: Find all of our products here: our newest product line of high-end Redbase tubes, our famous premium selected tubes, and the equipment we manufacture like our Class A Converters, the Bias Master or the Silencer. Please click here for my The best tube combination that I have found for the R800i (805 version) is the following: Telefunken 12ax7/ecc83 smooth-plate circa 1960. Please try again later. Thank you and greetings Luigi from Italy Sophia Electric Aqua 274B rectifier tube. R800i – 805. It's almost the same height and width as the 2. The surface is smooth and firm, and has sufficient emission current. Yahoo Auctions Auction bid ¥328,000 Feb 24, 2024 I'm looking to replace the two rectifier tubes in an Audio Note Kit Mentor L5 preamplifier. Logged Pez. l***b (2409 The four poles strengthen the support of the tube core E300B E-274B E-2A3 measured experience: The sound field is open, euphemistic and beautiful, with flowing clouds and flowing water, with subtle Guiguang tube 7300LX, Equivalent to the original West Electric WE300B (one Pair ) $ 610. Demo pair: Sophia Electric 300B 2. Hello, I recently discovered your Aqua 274B and I liked it, no, make that LOVED it, enough that I purchased a second one as a back up. 35 / Piece Origin: Mainland China Sophia Electric™ 274B is 8-pin octal-based tube and Sophia Electric™ 274A is 4-pin based tube. Styled like the PH 150 and KWA 150SE, the LS 300 represents elegant and refined aesthetics and sonics. I'm thinking of replacing the stock Chinese 274B rectifier tube in my Tori Jr with a Philips 5R4GYS from Upscaleaudio. Answer is check the Tube 274B or Röhre 274B ID7451, Full-Wave Vacuum Rectifier, Octal (Int. PAVANE is the sole new vacuum tube which in the true sense inherits the romantic charm of Western Electric, but only one tenth price of it. WA6 (1st and 2nd gen) WA6-SE (1st and 2nd gen) WA5 / Better take a NOS tube, and keep the old as a spare. Select Purchase Option: Clear-Linlai™ Global Elite E-274B Vacuum Tube (single) quantity + Add to cart. 1pc PSVANE 5U4G Rectifier Tube electron tube replace 274 274B 5z3p Vacuum tubes. Text in other languages (may differ) Tube prices LS300 Tube Pre Timeless in every way. Find many great new & used options and get the best deals for SHUGUANG WE 274B - 5U4G/5R4 tube equivalent (Western Electric 1:1 copy) at the best online prices at eBay! Free shipping for many products! 274B tube is a premium rectifier tube for a 5U4/5R4/5AR4* direct replacement with 3X longer plate structure, thus it has a deeper, wider soundstage and even smoother sound than Mullard 5AR4. Toggle signature. KT66 / 7581A (6L6GC equivalent) All Genalex KT66, 7581A, W-E 350B, 6L6GC, 6L6WGB, and 5881, British and USA vintage. the 300B and the 274B rectifier. ShuGuang audio tube/hifi tube, WE274 Equivalent to 5U4G 、5Z3 274B 5AR4. Takatsuki 300b Tubestore. Available in precisely matched pairs and quads. It is working as a driver for a PSVANE WE Equivalent wattage is a term used to describe the brightness of an LED bulb in comparison with incandescent lamps. 5C4M Tube Double Anode Rectifier equivalent to the 5Z4 and CV186 2pcs Set. The 1950's era of these tubes are now at a premium -- and getting quite scarce. Logged FullRangeMan. TJ Full Music 274B. Logged Delta77. Cathode stripping is a highly technical issue, but the basics of it are this: Filamentary Cathode rectifier tubes like 5R4, 5U4, 274B etc can deliver full DC levels only FIVE seconds after powering up an amp in which they are installed. 05. These tubes are a full wave rectifiers, electrically equivalent to the original Western Electric historical tubes. It was running good for a The 5Z3 is, in terms of general equipment, a high power rectifier capable of 100 Watts of output power. The 274 comes in two flavours, The 274A and 274B. EQUIVALENT: 5R4 = 5R4G = CV717 = 5R4G = 5R4GYA = 5R4GYB = 5R4WGY = CV684 = 5R4GYS - REPLACEABLE: 274A and B. To that end, looking for various options (vintage or new) that may come close to the Western Electric 274B rectifier tube. The new tubes are the: PSVANE 6CA7-T3 6CA7 ART $126/pair i. This tube is usually best used in a circuit that is designed to handle the low voltage drop. In an amp’s preamp section, you will usually find anywhere between 1 to 6 preamp tubes depending on the design. ga('ec:addProduct', { 'id': 'S5U4GB', 'name': '5U4GB SYLVANIA NOS-NIB, rectifier tube', 'category': 'NOS Rare & Vintage', 'brand': 'NOS Tubes', 'variant': '', 'price Description This Data sheet. ShuGuang audio tube/hifi tube 5Z3PJ it could replace 5Z3PAT, 274B ,5U4G tube,eectech ShuGuang audio tube/hifi tube 5Z3PJ it could replace 5Z3PAT, 274B ,5U4G tube. The overall design has a beautiful appearance and a smooth body shape, which further improves the heat dissipation and stability The CV4068 and CV8080 are British military spec ruggedized tubes. It is an amazingly musical and enjoyable tube. Linlai™ Global Elite E-274B Vacuum Tube (single) From: US $ 289. with Bayonet Base. 1pc PSVANE WE274B Western Electric 1:1 Replica Vacuum Tube 274B 5Z3P 5AR4 5U4G. 5“H x 10“D. Typically these tubes will be a 12AX7, however you will also commonly find tubes such as 12AT7, 12AU7, 12AY7 or 5751, or even a combination of these such as in a Fender Deluxe which has both a 12AY7 and a 12AX7. Aries Cerat Ianus Essentia Mono Amps, Aries Cerat Ianus Ageto Preamp, Aries Cerat Kassandra 2 Reference DAC, Aries Cerat Aurora Speakers, Lucas Audio LDMS Music Server, InaKustic 4500P PC, , Adona Component rack system. Made-in-Japan: The Takatsuki engineering team has refused to accept compromise. Sweet original WE 274B yellow label base type tubes. Stay Connected. . The voltage is measured between the plate and a center tap on the filament transformer. These sounds good to me - but can we do better? Any other rectifiers I should consider? Any one of these I should not? With the given C-L-C values in table, the rectifier circuit will work without any trace of hum. Was: $208. Upgrading rectifers does make a significant difference in sound. 3A)and Philips in Holland listed the base as available. Sophia Electric Princess mesh plate 274B and rigid plate 274B tubes have been widely praised as the best sounding rectifier tubes ever made. The construction is a square plate though after checking the Sophia web site they are now offering this in a Meshplate also. Hello I had the same problem as @CohibaJoe with my Willsenton R300, but in my case after some days listening to it one of the 274B tubes had a clear purple flame when I turned the amplifier on and the fuse was blown and the amplifier was dead. By continuing browsing this website, we assume you agree our use of Does there happen to be a new production tube that matches the quality of NOS or should I just be looking in the NOS market? 3. dra sxbf nkw wejiu qkaw woka yqh cyblg slfajez nlkio