5u4 vs gz34. Apr 27, 2010 #3 ; Commodore 64 Friend of Leo's.

• 5u4 vs gz34 Thread starter perchdog; Start date Jun 16, 2009; perchdog AudioDouchebag. I'd like to try the new ACME 274B tubes in place of the current 5U4G tubes in my Line Magnetic 210IA My amp is used 5AR4/GZ34,can I replace with 5U4G or 274B ? Audiogon The world's largest high-end audio community. On the other hand the only issue you might have with 5U4 could be 3A heaters vs 2A for the GZ3x types (including the Sovtek jugged edge anode GZ34). Feb 8, 2013 #1 but the 274B will lighten your wallet (and last forever). I used my Gibson GA-10 (now 5E3) as the test bed. hp = Heptode Unit. The Mullard GZ34 has a hole in the guidepin and the upper micas have 5 teeth 5U4GB vs 5U4. 83. The big difference is the current handling capacity. The 5U4 family draws an amp more heater current than the 5AR4. Hi, As long as the replacement tube is listed as a 5AR4 or GZ34 you can replace one with 4 pins with a 5-pin version. donation. So the operating temp of the PT comes down a The 5U4 pulls more current---2X--- than does the GZ34/5AR4, so you would have to know the specs for the PT in order to feel safe about that change. I don't think they made a major You'll get about a 20v increase by going from a 5U4 to a GZ34, and another 20v by going from a GZ34 to a SS rectifier. RCA, for example, supplied 5 pin versions, If it is wired to pin8 in a 5U4 circuit, you can substitute the 5AR4 into the socket and not have to worry about either the tube or the transformer, but continue reading. Thanks for stopping by. Yes - they draw more current but I have never seen an original power transformer GrAph #1 GrAph #2 full – wave vacuum rectifier Utr=550V Rtr=97 W 500V 82 W 450V 67 W 400V 52 W 350V 36 W 300V 20 W 1 W 1 W 5U4GB C F =40mF 5U4GB Rectifier tube is 5U4. 5V4 vs. 75 Our 5u4 Rectifier Tubes are an excellent & reliable response with a strong, dynamic response sound. i do not consider myself an audio fool and listen with my ears. of the 4 In addition, this Groove Tube GT-5U4 works as a suitable replacement for 5Y3, 5Y3GT, and 5Y3GTA, helping boost up power and dynamics. Replacing a 5U4 with a GZ34 presents only one problemhigher voltages. 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 A Modwright SWL 9. Attachments. will. The GZ34 is good for rock ‘n roll. We also use these in Mesa Dual and Triple Rectifier amps in place of the stock 5U4's to get a little less sag but to maintain that rectifier sound. A 5V4 would be safe and just barely drop less voltage than does a I have the same two DRs as you, a 66 BF and an early '71 SF. Would rather not shell out big buck$ for the 5AR4 if I can avoid it. Quote; No. I think you are looking at the heater current. Since that one subs for a ton of types, I'd guarantee its different on at least most of them. 5U4 is Firestorm wrote:The power transformer will certainly support the GZ34, which draws less heater current than the 5U4, but the GZ34 will raise the voltages in the B+ They are now pricy but their sound is often better than the GZ34's or 5U4's and others IMO. I don't want to risk Rectifier Interchangeability and it's relation to Clean Headroom. The 5Y3 might not be able to handle what the circuit demands. 004: 5U4. 33na3rd Forum Resident. I appreciate your candor and desire to make sure I don't kill my amps. doc Author: bergerons The Genalex Gold Lion GZ34 / U77 rectifier tube is smooth, refined, and balanced for the very best high-end audio sound. g. DO NOT use 5AR4, GZ34, 5V4 or 5Y3. The GZ37 is very tough and handles the 1920uf's of monoblock supply in my amplifiers that have a 5 ohm DCR just fine. Octal, IO) K8A, USA 1935 and Power-supply shown. 0 Biggest change in princeton reverbs over the years was going to a 5u4 from a 5ar4 with the same PT although current draw will be 1 more amp. 00 £15. There's no . I've tried RCA and National Union 5U4G and find them quite similar. EML 5U4G Mesh, as soon as 1st song starts. GZ34, 5AR4, 52KU, U54, GZ37, and Yes. This will mean increased headroom, but there is a real Rectifier Valves, GZ34, 5U4GB, EZ81, 5Y3, etc. So in the Putting a 5U4 into a GZ34 socket is not recommended because of the higher heater current requirement Putting a GZ34 into a 5U4 socket MAY be OK but you need to check if the lower current rating (160mA instead of 225mA) will be OK. 95 USD $23. Genalex - Gold Lion; They work, but usually the output voltage isn't the same. 5', 'brand': 'Tube Amp Doctor GmbH The modern-production GZ34/5AR4 seems to be less than perfectly reliable, too - so many of us here use "damper" (efficiency) diodes - either 2 tubes in a full-wave rectifier, or We know that the 5U4 drops more voltage than the GZ34, yet both schematics show 415 DC at the output tube plates. The GZ34 can tolerate a 60uF, but the 5U4 should be limited to a 32uF reservoir cap. Any 5U4 type is acceptable. Hey,I have a Gibson GA5 (1957 transition version), and I want to experiment with the rectifier tube. Didn't most Fenders use a different PT when the I've looked through the forum and not seen much in the way of a direct conversation comparing pros and cons of using a solid state rectifier in your tube amp vs the All the electrolitic caps are new so there's no prob. I have GZ34, GZ37 (expensive), 5U4, & 5Y3 (for small amps) as well as a SS plug. You feel this air, deeper image, Re: GZ33 or GZ37 rectifier tubes vs. Would a rebias be necessary when experimenting with the GZ34? 另外，5AR4 比 5U4 電流小，原本用 5AR4 者，也最好別用 5U4 替代， 不過，原本用 5U4 者，倒是可用 5AR4 替代 (但電流可能稍不足)。 也就是說，5AR4 可替代 5U4，但 5U4 並不適合替代 5AR4 (除非器材規格上許可)。 5AR4 經典名管 1. Availability. A couple of types are left off. Amplifier Hardware; Bias Tools; New Month We are at $40 this month in Donations. The 5U4 has a directly-heated cathode. GZ34 (or 5AR4 : ) Similar, if not identical, the British GZ34 was an ingredient Known now as the "Mighty" 596, this tube is similar to a 5U4G or 5U4GB and should work in most amps made for them. I don't have any real world experience with them other than the JJ GZ34's that are currently in my 5U4 Rectifier Tubes are in stock and ready to ship! A recent customer comment: That went 5AR4 / GZ34 Tubes ; 5U4 Tubes ; 5Y3 Rectifier Tubes ; 6CA4 / EZ81 Tubes ; 6X4 Tubes ; ga('set', '&cu', 'EUR'); ga('ec:addImpression', { 'name': 'GZ34-STR TAD REDBASE PREMIUM SELECTED', 'id': 'RT501', 'price': '36. Items 1-24 of 26. I have 6V6GT output Sovtek 5AR4. Best of both. 01 2 2 1970. 0SE phono pre-amp with Mullard GZ34. 03. Page. very nice warm sound, slghtly euphonic. tuberectifier-diodemod. Cary SLI-80 here, which used to ship with the Sovtek 5U4, I believe. By having this information on a chart you can choose a rectifier tube that will best suit your If I remember right the 5U4 draws double the heater current of a 5AR4(GZ34). Kap'n. Post n°1; gz34 vs 5y3 vs 5u4. Fender recommends this tube for use in the tweed reissue Just picked this up > Philips Miniwatt GZ34 Metal Base made in Holland with Date Code TV2 57A, it was in a Akerlund & Rausing box. In Stock; USD $449. Poorly made and tend to crap out. The latter have 36AM3. They are far and away my 2 favorite rectifiers. $51. I'm aware of no issue with the sub except that the voltage drop is indeed about 25V greater than GZ34 and heater current is 2. The amp has always been a 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. GZ34/5AR4 typically 20 volts higher. GZ34 is the English designation and 5AR4 is the American designation for the same tube. Higher voltages mean more headroom and tighter feel. You might want to have the idle current checked on the power tubes to make sure it is still within Seta1, my only understanding of what the GZ34 does is what I have read. If I remember right the 5U4 draws double the heater current of a 5AR4(GZ34). An often asked question. My guess is that because it runs a bit higher B+ it's a bit tighter, even with a 5U4 recitfier vs the BF's GZ34. 5AR4 / GZ34 / GZ37; 5Y3 / 5Z3; 5U4; 2A3 / 6A3 / 300B; 211 / 242 / 845; American 5 Tube Set; Parts & Accessories. sunil. I have tried: Amperex buggle boy GZ34 (black base); Sophia Electric 274b (mesh plate); and RCA 5R4gy (1944, dark brown base), and some other cheaper ones. Don't shy away from a used Mullard GZ34 as they have a life of 10,000 hours. If I wasn't running speakers with 8 15" drivers I might prefer the 5AR4's I can't say if this is part of the issue there, but it may be. Electro-Harmonix; 5AR4/GZ34 250 1500 450 415 10 1. New 1x Sovtek 5AR4 / GZ34 / 5U4 | One / Single Rectifier Tube | Free Ship. 7025, 12BH7, gz34, 6550 Tung-Sols 3225904 i hope the JJ make it through the testing and rebuilding, final testing, The 5U4 will give you less wattage than the stock 5AR4/GZ34, it will be a bit more spongy. Sovtek 5AR4 rectifier tubes are robust and work great in many different guitar amps such as Fender 40W and Vox AC-30 amplifiers. The 2 x AZ1 mesh which I regarded as unbeatable was arguably equalled by the more dynamic VT-244 version of the 5U4, the GE 5U4, the GZ33 Cossor and the 53KU. Joined Feb 12, 2011 Posts 31,948 Location Around. The Mullard GZ34 is widely regarded as the best of those tubes. You're currently reading page 1; Page 2; Page Next; Show For 5AR4, 5U4, 5Y3. New posts. Inexpensive Russian 5U4Gs are readily NOTE: It provides a higher supply voltages with 5AR4/GZ34 and 5U4. I'm sure anyone knows that it links through the Quick question. GZ34. GZ34 page sheet date 1 1 1970. 19. Wondering if it is ok to use a 5y3 or 5u4 in place of a 5ar4 in my ST The Soviet GZ34 was better than I expected. I have a no-name 5Z3 with this smooth anode and that sounds very nice. jpg. 95 USD $25. This will put some strain on your Power Transfomer. great I just got a pair of JJ GZ34/5AR4 for tech testing only to go through the amps and replace caps and resistors. 002: 5AR4/GZ34 New Metal base European: $600. There's a few minor component changes in the preamp. I try each one in any build w/ a recto socket and there's no telling which one will sound best. The transformer HT winding would be The GZ34/5AR4 may cause minor noise related problems or even cause it to fail due to increased voltages. The Preferred Series 274B rectifier tube is a full-wave rectifier that is very similar to the classic 5U4G. Because the plate voltage I have tried: Amperex buggle boy GZ34 (black base); Sophia Electric 274b (mesh plate); and RCA 5R4gy (1944, dark brown base), and some other cheaper ones. This octal based solid state rectifier is a cost effective replacement for any of the following tubes: 5AR4 / GZ34, 5Y3, 5U4G / 5U4GB, 5R4 / 5V4 / 5Z4 Not only is this an inexpensive Some are built to emulate a certain rectifier tube. Radio tubes are valves. And you're absolutely certain I replaced a bunch of new GZ34's with a 1961 Mullard Fat-Base GZ34, and I spent less than half on it than all seven of the new junk tubes that kept failing one after the other The 5U4 can handle a whopping 1A of peak current. Thanks for the clarification. B+ rises very quickly with this tube. I only use the GZ34 in older equipment that require it and either build My issue today is that I don't have a 5AR4/GZ34, but I do have both a 5R4GA-JAN and a 5U4GB. It has a pretty big effect on the way an amp The GZ34 is equivalent to a 5AR4, specs are 2 Amp @5V heater, 60uF max 1st Cap, good for about 160mA DC with an internal resistance of about 175 Ohms causing about a I have found the voltage drops listed to be a pretty accurate rule of thumb. 5R4-WGB USA (Cetron) Same as used in B52-B bombers. 4 KB · Views: 238 B. However, I read warnings that this could stress the power transformer. 0 for the GZ34. Telemanic Nova I was messing with my 67 super reverb today. p = Pentode Unit. This current draw makes it acceptable for many amps originally designed for a 5AR4/GZ34 tube. Randy . 002: 5U4G Sovtek large The 5U4, depending on the circuit, will drop up to 50v. Butyou won't see 20 volts of drop from a 5Y3GT vs 60 on a 5Y3. £19. It all depends on your application. Now that you've verified that the original AA1164 schematic in your possession shows a GZ34, I have to wonder if the web schemos are geniune or not. Rectifire tubes:- 5U4 GB RCA- GZ34 MullardAmp:- Fender DR Silverface 73Guitar:- Fender Stratocaster 62 CS with Fat 60 pickups by JosephinaEffects- Ts9- Blues So, in a 6L6 amp (like the SF Vibrolux Reverb), the swap from the 5U4 to a GZ34 will probably work out okay. Hello - I have a lovely Bogen AP-35 tube integrated amp. Other custom wood finishes are available Dimensions: 17 1/2" W, 9 7/8" H, 9 1/2" D 5U4. The B+ voltage will be higher with a solid state rectifier than with a tube, but for quick tests it's simpler to have one SS rectifier than 4 tubes. In addition, this Groove Tube GT-5U4 works as a suitable replacement for 5Y3, 5Y3GT, and 5Y3GTA, helping boost up power and dynamics. IF the power tubes will handle the voltage and one is looking for a bit stiffer sound, the GZ34 will function where a 5U4 is specified. It's much less sought than the other two, so it's way gz34 vs 5y3 vs 5u4. The chart is most useful when you use it as a guide to the relative voltage drops of Tube GZ 34 or Röhre GZ34 ID3410, Full-Wave Vacuum Rectifier, Octal (Int. Feb 9, 2013 #4 Epay for the WE tube, they The 5AR4/GZ34 has a total plate resistance of approximately 80 Ohms when used as a full wave rectifier (two plates in parallel). I have not been able to find a definitive answer this question so maybe a tube amplifier expert on this site can clarify for me. Wow, you don't even have to go to them here's some of the text I get for the links: vs. MikE Color Me Gone. This will combat cathode-stripping and stressing the capacitors and tubes. I know I have a couple I bought from a NOS tube vendor at my shop. 1) The way that LTspice models transformers. This tube has a single seam at top of bottle, halo getter, and straight-edge plates. 5U4 vs. I’ve used one in a Bob Latino’s sl70 power amp, Modwright pre and currently using one in my Cary SLP05. The 5Y3 and 5AR4 (GZ34) are at opposite ends of the spectrum of the various pin-compatible rectifiers. 0 GZ37 350 1000 450 388 37 2. So I would say your answer is "it depends". yes, Vibrasonic, the 5U4 draws 3 amps of current compared to 1. And yes the advice of not turning your amplifier back on immediately should be followed. It will quickly red plate (overheat) if used as a substitute! testrun. Not usually a big deal unless the caps are way under rated for the voltage they will see initially. I heard about switching the GZ34 rectifier tube and replacing it with a 5U4GB. Though, I seem to recall Doc saying 5AR4/GZ34 NOS USA manufacture tubes from RCA, GE, and Sylvania: $95. The EZ80 isn't bad either. As said, the 5U4 (& 5AR4/GZ34 Rectifier tubes drop the B+ voltage by different amounts. They're NOT necessarily interchangeable in any given amp, so do your research before swapping. There are few 5AR4/GZ34 250 1500 450 415 10 1. A few can use a 5u4 if the OT will handle the heater current. one older 5u4 (need to test) I only have an emissions tester but if you want one just pay shipping. They are vintage Magnavox and all the other tubes are good vintage also - except the GZ34 rectifier. 1. When using these in place of tube rectifiers, since there's no warmup time, 5U4 tube in Dynaco MKIII vs. I occasionally FULL - WAVE VACUUM RECTIFIER 5U4GB is a directly heated full wave octal base rectifier for Hi-Fi and guitar amplifiers. The 5U4 needs 3A filament current. 5U4GB, 5Y3, EZ81, 5AR4, and GZ34 Rectifier Tubes and Valves; Valve Amp Kits Menu Toggle. 0 amps vs. rfbro Posts: 27 Join date: 2014-12-28 Age: 69 Location: Vancouver WA. Add to Cart. -Tony GZ34 / 5AR4 is the same tube. I did some research at kcanostubes and I don't see why I couldn't, but I wanted to get This octal based solid state rectifier is a cost effective replacement for any of the following tubes: 5AR4 / GZ34, 5Y3, 5U4G / 5U4GB, 5R4 / 5V4 / 5Z4 Not only is this an inexpensive alternative, 5U4 and 5Y3 rectifier vacuum tubes in amplifiers with center tapped secondary power transformer. 5A of current. Location: The 5U4 also works really well in my amps, but the Mullard just adds a bit more of everything. Apr 27, 2010 #3 ; Commodore 64 Friend of Leo's. 3. 00 : I have several components that it explicitly stated that I can use a variety of rectifiers in the same family: 5AR4, 5U4, 5Y4, 5Y3 For instance, the 5Y3 (aka the 80) has much less current handling than a 5AR4 (GZ34) or a 5U4. ASK BEFORE YOU BUY OR TRY! ***We DO NOT recommend using any other 6V6 power tube other than the JJ 6V6. 01 4 4 1972. The NOS Matsushita 5AR4/GZ34 rectifier tube is a great alternative to the more expensive/rare Mullard and Amperex made 5AR4 vacuum tubes. 5AR4/GZ34 and other "GZ" variants are indirectly heated rectifiers with very minimal voltage drop. Expect less than 17v of drop at less than 250ma. In a 6V6 amp (like a SF Deluxe Reverb or SF Princeton Reverb), the same rectifier swap might be problematic. The big issue with using a 5U4 in place of a 5AR4 is that the 5U4 draws more filament current, which taxes the power transformer more. This of course comes at a cost and requires a heftier filament. As for why 4 pins vs. Title: Microsoft Word - Tubes Rectifier Data - Quick Sheet. Last edited by PhatTele; 05-08-2006 at 01:27 PM. However, as you said, the 5U4s are cheap at less than $20, Our 5u4 Rectifier Tubes are an excellent & reliable response with a strong, dynamic response sound. On a 2. It seemed to sound a bit easier on the ears when overdriven. It's that voltage drop that creates the "sag" that amps like the 5E3 have as part of their signature sound. They produce a similar voltage drop to 5U4 rectifiers but require only 2 Rectifier: 1 - GZ34 Controls: Volume, Treble, Bass Configurations: Head Colors: Black. 9 5V4 175 1500 375 400 25 2. $33. Some amps can supply that, some can't. Suitable for use in any 5U4 socket. 4. I realize that many manufacturers designed with the 5U4. 5R4 types may be used in an emergency. The 5Y3 has the most voltage drop and the lowest current capacity. You can follow me at:My website: ht Can the Boss Blues Driver do High Gain? 5U4G: A relatively firm rectifier often found in mid-sized Fender blackface and silverface amps. The Sovtek 5AR4 (GZ34) Rectifier is a suitable replacement for any 5AR4 rectifier tube. 5AR4 / GZ34, 5Y3, 5U4G / 5U4GB, 5R4 / 5V4 / 5Z4 Not only is this an This was because a person I met at a Ham Radio swapmeet told me that he liked the sound of his DIY 6L6GC powered amplifier using a 5U4 instead of a 5R4-GY and Other than the crazy, expensive metal-base Philips 5AR4/GZ34, there are also three varieties of black-base 5AR4/GZ34 manufactured by European Philips. It's a tad saggy at the moment, but I was wondering if I could safely use a 5AR4 in place of it's stock 5Y3. 18 One Brand New in Box Sovtek 5AR4 / GZ34 Vacuum Tube The Sovtek 5AR4 / GZ34 is one of the most popular rectifier tubes in audio and guitar. Like a solid state replacement, 5AR4/GZ34, 5U4 or a 5Y3. See the General Electric The RCA 5U4 and 5Z3 does for instance, though by all accounts it's a pretty mid-range performer. I had a tech change some caps etc a while back and he put a GZ34 in it. I have the Octal sized socket in my amp and I have changed the rectifier a few times to experiment with different voltages. Narrow By. Details; Discussions; Posts; This Some amps need a big rectifier like a GZ34 but most will work fine with 5R4s or 5v4s. , 17 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 This is a chart showing the specifications for 5 volt rectifier tubes that can be used in guitar amps. a GZ34. But if you look at the B+ REgarding CBG's post on rectifier tubes and Vibrsonics inquiry as to the current draw of 5u4 and GZ34's. 6V6 plates at 460v, 50 ohms if I remember correctly, and a 5U4-ish is about 150 ohms. Title: GZ34 Author: Philips Created Date: 3/20/1999 12:39:26 PM 5AR4/GZ34 does for sure. One was The GZ34 is an upgrade to the GZ32 and both are rated at 125 mA rectifier current. Member. GZ37 vs GZ34 rectifier tube. 5Y3/80 vs. Use when less 'sag' is desired in I see that the newer Route 66's are shipping with 5U4's, and that this will decrease headroom. t = Triode Unit. There was a blacker background using the Glenn adapter on the WA22. There was the 5U4G "coke" bottle, the 5U4GA, and the 5U4GB - and it's "twin", the 5AS4. skriefal, May 24, 2014 #10. A Modwright SWP 9. Rectifier tubes mostly work until they don't. IMHO, directly heated rectifiers like 5U4 have a “faster” more “transparent” sound with a lot of punch, speed, and dynamics as compared to a Mullard GZ34. There is another NOS rectifier with the same "sag" of a 5U4 but less heater current but I can't remember the number off hand. Brand New. Seta1, my only understanding of what the GZ34 does is what I have read. Compared to GZ34/5AR4, with 5U4 output is a bit lower, its a bit squishier and breaks up sooner. DO NOT get the JJ GZ34, they are terrible. Aug 29, 2004 #3 Mullard GZ33 The GZ33 "falls" between the GZ34 and the GZ37 in its capabilities. Print. The WE 274a and 274b is superior though. A perfect tube to replace the chinese or sovtek 5R4 rectifiers (any suffix, GY, GA, GB, GYB, etc) are pin compatible with 5Y3, 5U4, 5V4 and 5AR4/GZ34 rectifiers. I thought I'd try a 5U4GB to lower the plate Another thing to be careful about switching rectifier tubes is if you sub a 5u4 for a 5ar4 as suggested by some Dynaco ST70 articles, is that the 5ar4 is an indirectly heated tube while the 5u4 is directly heated. So when you are pulling significant current, you will get much more voltage drop across a 5Y3 compared to a 5AR4/GZ34. Feb 4, 2012 #5 on the power TX primary, as you no longer need to use the rectifier filament power (as much as 3amps @ 5v for a typical 5U4). 5U4GB typically 50 volts higher. A push-pull EL34 amp will run the ever living snot out of a single GZ34, and it will make a 5V4G scream for mercy. I don’t claim to have any “new” vintage tubes since I didn’t buy them original and I try to only use vintage tubes so Therefore, the CV378 series offers slow ramp-up and protection against cathode stripping. I prefer the 5u4 family as it has the tonal balance I like. Has anyone seen this before? I have only seen this type of box from only one I prefer the Mullard 5AR4/GZ34 in some circuits, but as Syrah said in his post, tube rolling is very circuit dependent. . Logged sluckey. Just to try it out, I stuck the old 5U4 tube back in that slot. Loaded with JJ 6V6GTs and modern JJ 12AX7s (for now). I have a bunch of these tubes 5u4gb some nos and some used. patreon. 5AR4 / GZ34 / GZ37; 5Y3 / 5Z3; DO NOT use GZ34/5AR4 or 5U4. d = Diode Unit. Yep, they are the same. I have been told the WE 422A is an excellent rectifier, but they are pricey. Mesa Boogie 5AR4 GZ34ACF Rectifier Tube 750504F. MAx plate voltage PIV is about 1300V or similar. EL84 Valves Singles Pairs Quads; 5881, 6L6, and 6V6 Tubes and Valves; EL34, KT66, KT77, KT88, and 6550 Valves and Tubes If you have any questions on tube availability or substitutions, direct them to repairs@drzamps. stumbled on this old thread looking for info on the mullard gz34 f31 vs f32 so i will reply for future refernce. Apparently I should have been using the former in my Magnatone 214 Tonemaster. For the 5Y3, this resistance is around 400 Ohms. S. This is a great replacement for 5U4 socket tubes. hx = Hexode Unit. Therefore, the CV378 series offers slow ramp-up and protection against cathode stripping. Buzz This octal based solid state rectifier is a cost effective replacement for any of the following tubes: 5AR4 / GZ34, 5Y3, 5U4G / 5U4GB, 5R4 / 5V4 / 5Z4 Not only is this an inexpensive alternative, but this solid state rectifier will firm up your low end. 01 3 3 1972. Just picked this up > Philips Miniwatt GZ34 Metal Base made in Holland with Date Code TV2 57A, it was in a Akerlund & Rausing box. While I'm partial to NOS rectifiers, it is because they last Beware as other have mentioned about the current draw of the 5u4 series over the GZ34/5ar4 Cheers. 003: 5U4G Vintage USA manufacture large bottle ST shape: $35. In all three cases A couple problems I have to start, and hopefully someone can give me a kickstart. 0 Biggest change in princeton reverbs over Does GZ34 and GZ37 are the same? According to the Tube Substitution Handbook the following tubes can be substituted for each other. 66. 5Y3, GZ34, 5U4. 5U4 | 5U4G | 5U4GB | 274B 5Y3 | 6087 EZ81 | 6CA4 GZ34 | 5AR4 HiFi Triodes, Transmitting Tubes Other Tubes Tube Sets Tube sockets and Accessories Speakers, Cabinets & more Parts for Amplifiers Parts for Guitars High Fidelity Tools and accessories Merchandise miscellaneous TAD Brand Distribution Historical Items New Products Special Offer Tube data sheets will reveal why a 5U4 would be better than a 5V4 and vice versa. rfbro. There is another NOS rectifier with the same 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 For starters, a 5U4 draws 3A fil current & the 5R4 only 2A - so this will put more load on the PTX, heating it more, maybe even overloading it. If you spring for some Mullards they last forever! I pulled one out of my Grandfathers blown Heathkit amp that The 5U4 can supply less current whereas the GZ 34 is the same as the 5V4. It is indirectly heated but the cathode is tied to one side of the heater. Menu. It’s mentioned in another forum post in a different thread that if you use a 5u4 in a Dynaco ST 70 instead of a 5ar4, power is reduced by 50%, e. 05-08-2006, 03:00 PM #10. There is no such thing as a 5U4GC (unless it's a relabel of some sort by a vendor). I bought a JJ that seems to work fine - the amp sounds very good. 00: 5AR4. This is a chart showing the specifications for 5 volt rectifier tubes that can be used in guitar amps. I also purchased to gz32 and tried it for the first time yesterday and have to say it is a lot warmer than the Holland gz34 which is more to my liking I have also ordered the gz37 fat bottle which I heard great things about , gz34 5AR4 / GZ34 - FIL : 5V, 1. Practically, the GZ37 behaves pretty much as an IDH 5U4. Please consider making a donation. There is a metal rectifier, 5T4, (3A) and later get a GZ34 (5AR4) which is 2A, will this cause any problems, if swapped. Free Shipping. :) The 5U4G features a fat / shouldered bottle for superior heat dissipation and is the coolest looking 5U4 on the planet! The 5U4G is a suitable replacement for any NP199-4 Now: $292. In my new Deluxe Reverb build, I was using a JJ GZ34S. 5U4/ 5R4 is directly heated tubes capable of 250mA to 300mA with much larger voltage drop and higher PIV (something about 1500V or similar). NEW Facebook google 5u4 5ar4 sag Hmmm 627 hits. A perfect tube to replace the chinese or sovtek 5AR4's that we have all grown to dislike so much Our GZ34's are tested in a custom rectifier tube test fixture. In fact i really like SS rectified EL84 amps! Just my taste i guess. I go back and forth between the 422a and WE 274b on my Stratus. They do come up instantly, but a 5U4 and other direct heat types come up pretty fast too. com/aornicreviewsA nice look at my descent into tube rolling madness. The GZ34 is designed for a much higher voltage application. Apr 24, 2012 #3 ; uriah1 Telefied. I’ve got one 5V4 on the way. The GZ34 is GZ34 drops about 10v under load, and 5U4GB drops about 50v. 141. by rfbro Sat May 21, 2016 10:09 pm. And positive changes from a GZ34, one of the faster, more defined rectifiers bottom to top, and extra good at big, but faster bass Of all the rectifiers, I liked the 5U4 for the mids, but it totally bagged out for bass power. 30-Day Return Policy. This 274B vacuum tube's filament draws 2. Started by MikeViking, December 30, 2018, 11:12:31 PM. I would stick with the stock GZ34 and go NOS at that I usually run the power section about wide open, and the sag from going to a 5u4 would be too much for my tastes. 5U4 Rectifier Tubes are in stock and ready to ship! A recent customer comment: That went 5AR4 / GZ34 Tubes ; 5U4 Tubes ; 5Y3 Rectifier Tubes ; 6CA4 / EZ81 Tubes ; 6X4 Tubes ; Other Rectifier Tubes ; 9 Products . jaymanaa RIP 1961-2018. The GZ34 was great for bass, but made the mids sound "solid-state". 274A/B, 6BY5, EZ80, GZ32, GZ37, 5R4, 5U4, and the 6AU4GTA . Bluebook The 5AR4 has a controlled warm-up characteristic, but otherwise handles conditions similar to the 5U4. Valve rectifiers / diodes are a mainstay Hello - I have a lovely Bogen AP-35 tube integrated amp. 5AR4/GZ34 Sovtek-Russia A new, improved 5AR4/GZ34 from Sovtek. I ended up with a compromise with a SS GZ34 sub creation of all things that had the best of both worlds! For preamps, the 5U4 again, or 6/12X4 or octal 6X5. No need to replace it unless you are getting low B+ readings or other symptoms. Many guitarists and bassists also fall back on this GT-5U4 for swapping with the stock GZ34 (5AR4) in the Vox Custom AC30C2 30W 2×12 Tube Guitar Combo Amplifier. My guess is that because it runs a bit higher B+ it's a 5U4, 5U4GB, 5AR4, GZ34, JAN 5Y3WGTA, U77, GZ37, 5AS4, 5R4, 6CA4, 6X4, EZ81, 5V4, - FAST SHIPPING - AUSTRALIA and NEW ZEALAND. 0 x Top. But if you look at the B+ with each type (as the previous poster has recommended) you'll see the difference and I'm sure that the 5U4 won't win out. 95. They are now pricy but their sound is often better than the GZ34's or 5U4's and others IMO. The GZ37 is very tough and handles the 1920uf's of monoblock supply in my For years I used the 5V3/5AU4, (super 5U4) as my standard build which requires almost 4A of heater current. The GZ34 5V4 vs. of the 4 rectifiers i have tried in my cary audio preamp, i have noted the following: stock sovtek. 0 Members and 1 Guest are viewing this topic. My favoured combination now is a 5U4 type for the output stage of the amp and a single AZ1 or AZ11 mesh for the input stage. Would a rebias be necessary when experimenting with the GZ34? 2. The amp does use a 5U4 either GA or I have several components that it explicitly stated that I can use a variety of rectifiers in the same family: 5AR4, 5U4, 5Y4, 5Y3 For instance, the 5Y3 (aka the 80) has much less The 5U4 heater takes 3 amps, so plan for that. I prefer indirectly heated types (5AR4/GZ34) if the circuit is willing. the 5U4 draws 3 amps @5v while the 5R4 draws 2a. I actually much prefer Amperex GZ34 sound a lot cooler than 5AS4, other than sound singnature, they are about equal. The GZ34 and the 5V4 are both rated for 500 volts rms but the 5U4 is rated at 350 V. Thread starter 63pontiacgp; Start date Feb 8, 2013; 63pontiacgp "Tubes Smell Good" Subscriber. One was manufactured by Mullard's Blackburn factory with code "B", one was manufactured by Philips' Sittard, Holland factory with code "X" and one was manufactured by Belgium Mazda's metal GZ34 ( variations engave but my top is RSB55, perfect all around and liquid) U52 ( sweet UK sound, a little slow to my taste) Tunsol 5U4G top foil getter ( perfect for rock and drum) brimar 5R4GY/CV717 ( early version top config look same to WE274 top, this is holy grail for jazz and blue specially vocal nothing beat this) A 5U4 tube (English Latin), on the other hand, is not the same as a 5C4. Don't shy away from a used Mullard GZ34 as they have a life I wish these ge 5u4 were reliable like mullard gz34 seem to be. I have 6V6GT output tubes in it. The diode replacement drop is essentially zero. GZ33 or GZ37 rectifier tubes have some disadvantages. 5Z3P vs 5U4G vs 274B. 5AR4 / GZ34 Rectifier Tubes are in stock and ready to ship! A recent customer comment: That went 5AR4 / GZ34 Tubes ; 5U4 Tubes ; 5Y3 Rectifier Tubes ; 6CA4 / EZ81 Tubes ; 6X4 A simple set of measurements of the performance of a 75 watt, KT88/6550 vacuum tube power amplifier measuring idle plate voltage, plate voltage under full lo If it was a 5U4 then you probably have higher plate voltages and less sag now. I see that the newer Route 66's are shipping with 5U4's, and that this will decrease headroom. I believe the 5U4 can handle up to an amp (1000ma) while the 5R4 can only handle 250ma. Brands. View Profile View 5AR4 / GZ34 Rectifier Tubes are in stock and ready to ship! A recent customer comment: That went 5AR4 / GZ34 Tubes ; 5U4 Tubes ; 5Y3 Rectifier Tubes ; 6CA4 / EZ81 Tubes ; 6X4 Tubes ; Other Rectifier Tubes ; 9 Products . 0SE line stage pre-amp with Mullard GZ34. It is also similar to the RK60/1641 tube which is also The 5AR4/GZ34 has the least Vdrop, then the 5V4, then the 5R4 and finally the 5Y3. 00 : 5AR4. 002: 5U4G Sovtek large bottle ST shape tube with thin, folded filament: $10. 01 5 FP 1999. Both are excellent tubes. By having this information on a chart you can choose a rectifier tube that will best suit your You'll get about a 20v increase by going from a 5U4 to a GZ34, and another 20v by going from a GZ34 to a SS rectifier. Was: $325. This tube has a nominal voltage drop of about 17 VDC, and is rated for 225 mA. This will mean increased headroom, but there is a real I’ve had great experience with metal base gz34’s. Here's the list of the most common guitar amp rectifiers in order of most to least clean headroom (highest to lowest GZ34 drops about 10v under load, and 5U4GB drops about 50v. com. Hopefully the highly technical producti I had always assumed that all PR's from the BF to the early SF era took GZ34's, and until recently never even noticed the 5U4GB in the AA1164 schematics and layouts on the web. I set up a test to see just how different they are. I think I'll just use the 5U4 but I wasn't shure after reading it would sound better with the GZ34. In Stock; USD $79. Previous topic - Next topic. 8A vs 2. The modern-production GZ34/5AR4 seems to be less than perfectly reliable, too - so many of us here use "damper" (efficiency) diodes - either 2 tubes in a full-wave rectifier, or paired with (eg) UF4007 SS rectifiers in a hybrid bridge. We know that the 5U4 drops more voltage than the GZ34, yet both schematics show 415 DC at the output tube plates. my18watt Unrated Posts: 7 Joined: Thu Mar 22, 2007 8:00 am Location: Germany. A 5W4 has about the same specs as a 5Y3, but will drop a few Patreon: https://www. Inexpensive Russian 5Y3GTs are readily available but we have found they raise the plate voltage considerably and therefore do not recommend them in these I have the same two DRs as you, a 66 BF and an early '71 SF. Joined Mar 1, 2010 Posts Now I have to settle on the rectifier in my Dac (lampizator Dac 4 gen. 9A, Drop : 17 V @ 225ma Indirectly heated cathode Rectifier Tube Very long life if kept below the limits. There is no For what it is worth, I prefer the Ken-Rad 5U4G, for its superior dynamic clarity. 00: 5U4. My amps are currently using the 5U4 tube, and many that have used this amp with this tube love the "triode" like quality, but call me stupid, I don't see how a rectifier tube can make an amp sound like it's triode especially when people making such a comment are coming from a 5AR4/GZ34 tube! But once you start considering different types - solid state vs 5y3 vs 5u4 vs GZ34 they can somewhat more substantially change the behavior of the amp. I also keep this in my first aid kit 另外，5AR4 比 5U4 電流小，原本用 5AR4 者，也最好別用 5U4 替代， 不過，原本用 5U4 者，倒是可用 5AR4 替代 (但電流可能稍不足)。 也就是說，5AR4 可替代 5U4，但 5U4 並不適合替 I prefer the Mullard 5AR4/GZ34 in some circuits, but as Syrah said in his post, tube rolling is very circuit dependent. You will also get a few more volts on the B+ due to lower internal resistance. DIY Central. 5AR4/GZ34 NOS USA manufacture tubes from RCA, GE, and Sylvania: $95. The popular GZ34 (5AR4) was developed to fit into low-profile equipment, thanks to its short envelope. They are much more expensive than a GZ34 2. View as Grid List. SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. 6V6 plates at 460v, and bias about 15mA each tube. I guess you should avoid the Phillips GZ34 as it is too expensive compared to its sound quality - unless you have money to throw away (we only live once) or are a collector. Other custom wood finishes are available Dimensions: 17 1/2" W, 9 7/8" H, 9 1/2" D stumbled on this old thread looking for info on the mullard gz34 f31 vs f32 so i will reply for future refernce. I don't have any real world experience with them other than the JJ GZ34's that are currently in my amps which "appear" to be working fine and my desire was to use something NOS and not Russian in that slot. once back home out come a pair of 1959 Mullard 5AR4/GZ34 rectifiers with all the 1959 old NOS tubes. 8 5U4GB 275 1550 450 375 50 3. This GZ34 (5AR4) vacuum tube is robust and works great in many different guitar amps such as Vox and Fender amps, but also vintage hifi like Dynaco and Scott. Level 5; Posts: 5083; Re: 5U4M/5C4M Rectifiers « Reply #10 on: March 27, 2022, 05:53:46 pm Hi, As long as the replacement tube is listed as a 5AR4 or GZ34 you can replace one with 4 pins with a 5-pin version. The 5V3A at 3A is more usable in classic gear that can The major difference IMO is the 5U4 vs the GZ34. 5AR4 vs. Replaces 5R4-GY, 5U4 and 5Y3 rectifier tubes in amplifiers with center tapped secondary power transformer. I've switched back and forth a couple of times, about 3 months with the 5U4 5U4 | 5U4G | 5U4GB | 274B 5Y3 | 6087 EZ81 | 6CA4 GZ34 | 5AR4 HiFi Triodes, Transmitting Tubes Other Tubes Tube Sets Tube sockets and Accessories Speakers, Cabinets & more The GZ34 is an example of a typical high current rectifier for small equipment use. So you should be OK there. Virtual Systems Let the world see what you've built. The tube lineup is 7408 (6V6), 12ax7, 6eu7, 12au7a, and GZ34. Deeee. Many guitarists and bassists also fall back on I found that the GZ34 and 5AU4/5V3A were equally good sounding, but the 5V4 was poor in comparison. The 5V4 actually drops more voltage than a 5U4 so unless you want 20 volts or less in your amplifier, don't use the 5V4 in place of the 5U4. I also pulled the vintage GE 5V4 out of my '63 AC30, the Chinese 5AR4 I started with, and the Sylvania 5U4 that came in what started life as a '74 Fender Pro Reverb. Didn't most Fenders use a different PT when the change to 5U4 from GZ34 was made to make up for the voltage differences? Does anyone have any insights on this? The most common rectifiers found in vintage British tube hi-fi gear include the GZ30 (5Z4 equivalent), GZ31 (5U4), GZ32 (5V4), GZ33, and GZ37. If this is a single rectifier amplifier, a GZ34 is much closer to what it likely wants in terms of current available. The rectification portion of the circuit in the Cary has the two 5U4 postions in line. The legendary GZ34, though, has a much more refined, more THat shows 17v drop at 250ma on a GZ34, 25v drop at 175ma on a 5V4G. 9). There is one copper Cap that is built to be nothing more than a solid state rectifer that fits in an octal tube Rectifier: 1 - GZ34 Controls: Volume, Treble, Bass Configurations: Head Colors: Black. Of the two I always seem to go back to the '71 as a player. You can easily swap those - FWIW. That's why it's recommended that you not use it. Forums. With 5Y3 typically 75 volts higher. BillyB Well-Known Member. 4). 6V6 Based Kits; 12BH7 ECC99 based Kits; EL84 Amp Valve kits; 6L6 Guitar Amp Valve Kits; EL34 Based Kits; Power Valves Menu Toggle. Can I swap my 5U4 with a 5AR4? The answer is Yes and NO. Silver Supporter. Very well built piece of gear. And stop watching those youtube videos where the person doesn't know what they are talking about. If your amp's This point is much more pronounced when swapping between directly heated rectifiers like 5U4 and 274 and indirectly heated rectifiers like GZ34, GZ37, etc. The reduced current draw of the GZ34/5AR4 is actually esaier on the PT than the 5U4. Philips-Miniwatt GZ34 鐵座，市價約 10 - Other than the crazy, expensive metal-base Philips 5AR4/GZ34, there are also three varieties of black-base 5AR4/GZ34 manufactured by European Philips. 5Y3. Jun 16, 2009 #1 5U4/5AR4/GZ34help clear the madness! jwrosenthal; Swapping one GZ34 for another probably won't be perceptible, but changing to another type like a 5V4, 5U4, etc. GZ34/5AR4 question through the meaningless drivel you and a Pretty useful thing. It features and indirectly heated cathode, so you'll have a slow warm-up of the amp. The GZ33, however, is a high current version and is rated at 250 mA rectified current, and unlike its lower Someone gave me a few solid state replacement rectifiers for 5u4. Has anyone seen this before? I have only seen this type of box from only one The 5U4 filament winding draws more current than does the 5AR4 (3. nji renphfgl kvvb kwfvk cipy xvxhqw xgf mcxi tcst bxcd