5ar4 vs 5v4. This means y.

5ar4 vs 5v4. SS, 5U4, 5V4, 5AR4, 5V3 & 5Y3 Rectifiers Compared In 75 Watt Vacuum Tube Audio Amplifier Tube Rectifier vs Solid-State Rectifier - What's the difference? 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 load and power output for five different Aug 13, 2015 · The rectified voltage will be higher as the gz34 drops less voltage than the 5v4, maybe a percent or 2. Octal, IO) K8A, USA 1935 and Power-supply shown. For an amp with that sort of load (quad of 6V6s), that's exactly what my experience has been, too. I'd like to make sure this is safe before I try it - as you can imagine Jul 23, 2013 · There have been several threads at various times on the suitability of subbing a 5U4G rectifier tube for either a 5V4G or a 5AR4 in a ST-70. I can tell it has less clean headroom. Replaces 80 (with 4-pin base). Very liquid and smooth, and the slower attack helps tame the natural bright transients of the amp. ) provide differing amounts of voltage and sag, so I would imagine that such a change (from a 5AR4 down to a 5Y3, etc. I have recently acquired a PrimaLuna Dialogue Three preamp. Dec 23, 2020 · The 5V4 is closer to a 5AR4 but drops 10-20 volts more in a typical amp. Oct 23, 2022 · I found this on the internet, so it must be true Typical Rectifier Voltage Drops • 5Y3 – 60 volts @ 125 mA • 5U4GB – 50 volts @ 275 mA • 5U4 – 44 volts @ 225 mA • 5V4 – 25 volts @ 175 mA • 5AR4 – 17 volts @ 225 mA As a safety note – you can generally go “down” but not always “up”. It is NOS though. May 17, 2012 · To me, the 5V4's do a much better job at bringing out the amp's potential. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. Nothing a 5Y3 can't handle. The 5V4 draws 2. Vdrop: 60V @ Imax: 125ma Jul 17, 2020 · Based on my experience with the 5V4 vs. Amp uses 2 x 7247 and 4 x 7591 tubes. The circuit board is finished if we use an EZ81. 5V/46. Click to expand Thanks, scooteraz. Apparently these tubes are interchangeable but I can't find anything to back this up. He just got his trannies from hoffman. You can increase that with greater circuit resistance, however once you do the math, I have yet to find a production amp that has enough resistance to allow for a bigger cap w/o actually adding resistance. 20V for the 5Z4). My current 5U4 factory tubes (electro-harmonix) This is a chart showing the specifications for 5 volt rectifier tubes that can be used in guitar amps. 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. 4-pin Copper Cap. Because of this direct connection, you really can't run any other tube on the circuit. The chart is most useful when you use it as a guide to the relative voltage drops of different rectifiers. Our 5R4 / 5V4 / 5Z4 Rectifier Tubes are powerful, sturdy rectifier tubes & have a reliable response with a strong, dynamic sound. Will this run the risk of damaging anything ? Thanks ! 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. Mar 11, 2006 · Difference between 5V4GA and 5AR4 rectifiers? I need some technical help. (something David Allen says is OK) and came across this May 12, 2022 · In my Allen Accomplice I've been running JJ 6L6GC's Biased at 396. Dec 15, 2015 · For low voltage drop, as well as the 5AR4, there are the 5V4 and 5Z4 tubes. Lately (last 2years) the vendors I trust the most have been saying the current production Chinese 5AR4 is better, more consistent and reliable. This means y Sep 9, 2007 · I've got an old Heathkit AA-111 stereo tube amp. The starting volatge is 425 volts from a diode rectifier and each tube’s specs drop from Apr 22, 2021 · I was looking at how these 2 tubes compare. One solution for this is to add 100 ohm/10W resistors in series with each 5V4 plate, or add a bit of resistance in the B+ feed. com (great site and I'm not afflicted in any way): " 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: 1) Solid State Rectifier (NOT Weber Copper caps) 2) 5AR4/GZ34 3) GZ37 (3 amp filament current) 4) 5V4G/A (Possibly lower if plate current of Mar 25, 2010 · For a long time, the sovtek 5AR4 was the most consistent reliable 5AR4 on the new production marker, only because the bar was not set very high. 2 mA My Sovtek 5AR4 just died. Taking what I see from Decware directly, for the three applications I see: OUTPUT: 6P15P-EV SV83 EL84 6BQ5 INPUT: 6N1P 6922 6DJ8 7DJ8 6N5P 6N23P RECTIFIER: 5U4G 5U4 5AR4 5Y3GT 274B (not all Oct 20, 2018 · I don't recommend using a 5V4 to replace a 5AR4 in an ST120 as the 5V4 while they look similar to a 5AR4, they aren't, especially in the voltage rating department. Same heater current demands too. Nov 14, 2008 · Here's the answer quoted from www. Apr 3, 2022 · Would a 5AR4 from Bugera also be suitable for what I’d want to use it for? Could a rectifier tube provide a big sonic upgrade if I spent enough money on it? Can I make a sonic upgrade from what I believe (I haven’t opened up the power supply yet) is the stock EH 5AR4 without breaking the bank? I have subbed 5V4 for 5U4 in a tweed amp. Jan 27, 2020 · Post addressed to the owners of Primaluna preamplifiers. 5R4 types may be used in an emergency. The 5U4 has a quick turn on, so the surge voltage will be higher than the static voltage as it waits for the power tubes to draw current, but in my experience, 500 volts will be fine - good quality caps can handle the surge. I'm thinking of running New "Reissue" Tung Sol 5881 tubes with either a 5V4 rectifier or a 5R4GY instead of the 5Y3GT and I also have a 5AR4 that I could use with Nos JAN Philips 6L6WGB's. If you have too much sag in your low end, then Just build it with the octal rectifier and then you can try a 5v4/5ar4/5y3 or a SS adapter and see which one you like. My understanding is they are not interchangeable with the 5AR4 & 5U4G. I get 428vac to center tap from transformer. This is a very popular rectifier to use in place of 5U4, 5AR4, 5Y3, 5V4 and many others. com. Not sure what the plate voltage currently Dec 10, 2013 · Dubstep Girl's Massive 5AR4/5R4/5U4G Rectifier Review/Comparison! (Rectifer Tube Rolling thread) Home Forums Equipment Forums Mar 17, 2005 · AFAIK, the 5V4 lies between a 5U4 and a 5AR4 as far as voltage drop. Jan 27, 2011 · My experience is similar in that I know nothing of the 274b, and it is important to make sure the 5AR4 and 5U4 can be used in the same circuit. I've heard that you can improve the sound of this amp by substituting a 5AR4 rectifier tube for the original 5Y3GT. Original 5AR4 + 2 series connected chokes put out 520v. recommended first filter cap is 10 uf. (not the new 'premium' preamp, the original Dialogue Three) It's a fantastic unit and sounds incredible. Aug 29, 2009 · So then, one could say that a 5V4 and 5R4 have voltage drop values of 23 and 45v, respectively, at their "average" current output? As well, (to add to the spreadsheet), what is the maximum capacitor size you can place after a 1N4007 diode? Apr 1, 2018 · This is for amp build from organ parts. My concern is that the currently made Russian and Chinese 5ar4 are very unreliable. 9 volts. Aug 29, 2004 · A 5AR4, though, will have a significantly lower voltage drop than a 5U4. Mar 4, 2009 · 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. The 5V4 tube comes in the older ST style "G" glass and in the newer "GT" style glass. Filament draw is 3 amps. 3v and 5v taps. Apr 12, 2007 · Playing around this evening with my fried Valve Art 5AR4 I made kind of a surprising observation - losing one of the filaments doesn't seem to have affected it much, at least from a voltage standpoint. Today, these are most often seen in pairs as a replacement option for the single firmer GZ34 (below) that comes standard in a Matchless DC30, for players who want a softer playing feel and a little more sag. e. I'm trying to get a little more clean headroom while still retaining the The typical 5v rectifier, like 5AR4 or 5Y3 is directly heated. the 5U4GB. 5v4's aren't made anymore, so I bought an old set of GE 5V4GA's from ebay. Jun 16, 2011 · Matsushita made a nice 5AR4 that is very close to a Mullard and can be had cheaply. I think there was a Silvertone or Dano amp that had P/P 6L6's with a 5Y3? But can't remember for sure? I like the VVR idea. I asked Wil Feb 25, 2016 · For a SE EL84, it should be OK. Installing this tube into an amp that calls for a GZ34/5AR4 MAY blow the power transformer. Apr 11, 2007 · Doing some tube swapping the other evening, I managed to arc and open one of the filaments in a Valve Art 5AR4. So would a 5R4 be in between a 5AR4 and a 5Y3 in terms of voltage drop/sag/softness, etc. Thanks, Dmitriy Nov 16, 2020 · I also wonder about tube rectifier recommendations for the tweed Tremolux here: "Rectifier tube is 5U4. 5V4 Tried a couple 5AR4's, can't remember the brands but I think one was a Sovtek. com/content/newsletter_details. Sep 7, 2008 · I would get 500 volt capacitors to be safe, especially if you think you might use a 5AR4 or 5V4 at some point in the future. I use one in my vintage '65 Princeton Reverb (5AR4 version) to drop the voltages down to close to 60's levels, with the higher wall voltages we have these days. The King of Tubes! Feb 20, 2010 · Other tubes I tried were 5Y3 -- 295v, 5V4 -- 356v, and a 5AR4 -- 369v I checked voltage because the amp has a replacement power xformer with less voltage than orig, but a higher current rating, rectifier was a 5U4 Oct 25, 2020 · I have a SE84UFO2 on order, and it seems it is pretty forgiving about using different tubes. The current capacity of the 5ar4 is a little more than the 5v4 so that is a bonus. May 29, 2022 · I was just looking at the tubes4hifi website and I notice that the ST120 and M-125 amps have switch to the 5U4 rectifier from the 5AR4. I have always used a 5Y3 but I was looking at an amp that calls for a GZ34. First : DO all rec tubes have the same pinout ? so they are "interchangeable " ? I am thinking of trying a 5AR4 vs a 5u3 in the same amp to compare tone and sag characteristics. I've achieved some very nice results tube rolling some of the other components I own (ed). I agree with some previous posters though--wait for a relatively new testing used Mullard to show up at auction and snap it up. Harry May 17, 2012 · 5AR4 vs. asp?ArticleID=3 If the amp is running 6V6s, the 5V4 or 5R4 are likely the safest to run. In some cases, changes were huge (e. The 5U4 family can handle more forward current than the 5AR4. Jul 24, 2010 · The diode tubes in the Prologue 3 and 8 are 5AR4 tubes (Chinese). I searched around a bit but could not decipher the explanations. 9 amps of current and can supply up to 250 mA of current. In the 5Y3, the filament is also the cathode, and in the 5AR4, the filament and the cathode are internally connected. The 5R4's cost 25 to 40 volts, and all are used, mostly pulls from military surplus. But the 5V4 is even lower-resistance than the 5Z4 (I won't guess where the 5AR4/GZ34 falls on this chart, which apparently pre-dated the 5AR4). The 5R4 can handle high plate voltage and is one of the beefier rectifiers. 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. 02 seconds, for out maximum voltage to be developed, 413. I'll probably use a 30 watt G12H30/Hellatone 30 or a Weber 12A125O 30watt speaker. Z Route 66 has a NOS GE 5V4GA rectifier in it. 5U4G Rectifier Dec 10, 2013 · Dubstep Girl's Massive 5AR4/5R4/5U4G Rectifier Review/Comparison! (Rectifer Tube Rolling thread) I like the 5V4 rectifiers Hoffman sells with 5881's real well. The 5U4G is rated for less current draw vs. DO NOT use 5AR4, GZ34, 5V4 or 5Y3. I'm looking to get 450v or close to it. Oct 1, 2012 · 5AR4 rectifier (17v drop), Mullard especially, has one of the smallest drops in voltage, which lead to tighter sound, but also more transparency and more speed, but warmth was sacrificed – with type 45 and 2A3 tubes that was not a desired effect. Did a little search and the 274b equivalents are the 5R4-GY & 5V4. May 8, 2014 · So, buy a tube and let us know how it works for you. I know these amps are bard on them. Jun 26, 2021 · I am looking to experiment with different rectifiers in an amp. Jun 9, 2006 · What does a 5V4 in a Bassman amp, do as opposed to a 5AR4? TIA, Nov 19, 2000 · It has less voltage drop than the 5Y3 but more than the 5V4 and GZ34/5AR4. It is a great tube to put in old amps that took 5AR4's to keep the voltages more in line with today's higher wall voltage. kcanostubes. , 5AR4 vs. Free shipping on many items | Browse your favorite brands | affordable prices. I had a GE 5AR4 to replace it with (noticeably improved the sound quality, to my surprise) but the cost of replacement NOS 5AR4's got me thinking of substitutes. The PT has 6. Telecaster Guitar Forum Buy JJ GZ34 / 5AR4 rectifier vacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. Please report any I can't tell for sure from the picture, but it does look like it has the chunkier plates with copper holes of the sylvania big bottle 5AR4 than the more typical flat plates of the 5V4 (at least the ones I've seen). This is one of the strongest vacuum tube units used today. Aug 13, 2018 · 5V4: Housed in a slightly smaller glass bottle than many other eight-pin rectifiers, the 5V4 is a little firmer than the 5Y3 and 5R4. Due to the increased current draw of the 5U4, I would not sub it in an amp designed for 5Y3, 5V4, or GZ34. That's because they are heater/cathode style tubes: the glowing heater takes time to warm the cathode, which is actually passing current. He really wants to use a 5AR4 recto, so I guess I have 2 questions: 1. Jan 18, 2009 · I recently got a nice 5V4, and I wondered if the amp techs here could tell me for sure whether it would be safe to use in my PR. a 5AR4 in the same amp, I would expect around 20-30 volts drop in B+. 8 mA and 396. I think that's a great rectifier tube. Settled for 5u4. Sep 7, 2008 · The 5U4GB's cost about 20 to 30 volts. Z's website says that the 66 uses a 5AR4. I plugged it into a small homebrew power suppy laid out in the usual fashion: Stancor PN 8403 May 21, 2016 · gz34 vs 5y3 vs 5u4 by rfbro Sat May 21, 2016 10:09 pm Wondering if it is ok to use a 5y3 or 5u4 in place of a 5ar4 in my ST 120 Like Dislike Tube 5V4G or Röhre 5V4G ID3302, Full-Wave Vacuum Rectifier, Octal (Int. The 5AR4 draws 1. 5V4 is rated for 175 mA, 5U4 for 250 so it 5V4 may be marginal in a push-pull amp. They went bad after about a month, kept blowing fuses. So yeah, the 5Z4 is lower-resistance than the 5Y3. Mar 20, 2007 · In fact, I believe I remember that a well-known amp guy that is knowledgeable about vintage Voxes recommends running the 5V4 in older AC30's to bring the voltage down. The reverse will not necessarily be a correct replacement. My Dr. I bought the amp used and assumed that it had the correct tubes but upon close inspection it doesn't. Dr. Most of them are used tubes of unknown origin. By having this information on a chart you can choose a rectifier tube that will best suit your playing style. Any knowledge of this will be greatly appreciated. Personally, I have a Hewlett-Packard 200B audio oscillator where the 5Z4 has been replaced with a 5Y3GT, and though I haven't tested it yet, I'm guessing it didn't affect operation too An often asked question. I measured this once in a circuit, and the 5AR4 gives you something like 30+ volts more (depending on how worn the tubes are). 9 17 250 450 low Vdrop 5U4/5Y3 5AS4-A 5T 5 3 50 275 450 improved 5U4 5AT4 5L 5 Jun 29, 2007 · EZ81 -vs- 5AR4 by Colin_D » Mon Jan 14, 2008 8:35 am I'm helping a friend build a richie TMB. I like the snappier, less saggy response, and the way the amps handle pedals. just too damn high. So my question is what's the consensus for the best new manufacture 5AR4? The JJ lasted 5 or 6 years, but I don't run the Apr 21, 2009 · Hey,I have a Gibson GA5 (1957 transition version), and I want to experiment with the rectifier tube. I chose the 5R4 knowing that it produces lower voltage and only requires 2 amps heater current. Mar 22, 2009 · The 5AR4 and 5V4 are similar and are both indirectly heated. 5U4 drops more voltage than a 5AR4/GZ34, but less than a new production/Russian "5Y3" which drops less voltage than an old-production/American 5Y3, etc. " Any idea why they would say a 5R4 was acceptable, but not a 5Y3 (similar voltage drop)? Actually, the 5E9-A (cathode bias) schematic shows Feb 17, 2003 · I'm thinking about what rectifier tube to put in an incoming tweed deluxe. Dec 10, 2013 · Mullard GZ34/5AR4 (metal base) Metal base 5AR4 made by Mullard/Philips (Miniwatt) /Amperex (Bugle Boy logo) in the 1950s before it got replaced by the black base version which is much more common and not as good sounding. The schematic for the 64 DRHW lists the 5AR4 but right beneath, in parenthesis, the 5U4 is also listed. It looks like 5R4G/GY/GYA can drop additional 57v. You wouldn't want to use a 5V4 in place of Aug 27, 2019 · The 5V4 warms up slower, but otherwise it should work fine if you need some extra volts. 6V/44. I never compared 5V4 by measurement, but I guarantee it will have a greater drop than 5AR4. . Feb 26, 2003 · I put a 5V4 in my vintage '65 PR, it is closer in specs to the 5AR4 than a 5U4 (which draws more heater current), and drops the voltages about the same as the 5U4. All and all still sounds pretty decent. I read a lot about substituting these but want a final opinion before doing it. Hopefully the highly technical producti Five Volt Full Wave Rectifier Tube Tube# Base Fvolt Famp Vdrop MaxPmA MaxPv notes 5AR4/GZ34 5DA 5 1. What is the differenc Oct 16, 2003 · I'm the original owner of a 1989 SF Vibro Champ - still going strong on the original speakers and tubes. In this video we see how different vacuum tube rectifiers and one vacuum tube solid state replacement rectifier affects the power supply voltage in the amplifier and the power output with The metal collared Mullard 5AR4 are the most desirable and the most expensive of the tube type, but they reportedly last for many tens of thousands of hours, so in the long run it might be worth the expense. 5AR4 will get you about another 10v over a 5V4. Get the best deals on 5v4ga tube when you shop the largest online selection at eBay. Feb 11, 2020 · So the JJ 5ar4 I've used in my VTA ST-70 finely failed after about 5 or so years. I think they traditionally use 5Y3's. Jul 16, 2009 · As mentioned, the 5U4 tubes will work in the simple SE, although they are directly heated (will warm up faster than the indirectly heated 5AR4) and will drop more volts than a 5AR4. Oct 14, 2020 · 5AR4 Rectifier Moving along, we substituted a 5AR4 vacuum tube rectifier. http://www. Wouldn't this be easier on the amp? I know the 5AR4's are indirectly heated, which would seem to be much easier on the amp when powering up. Oct 20, 2018 · I don't recommend using a 5V4 to replace a 5AR4 in an ST120 as the 5V4 while they look similar to a 5AR4, they aren't, especially in the voltage rating department. Any 5U4 type is acceptable. I would like to know what sonic changes others may have found by substituting either 5V4G or 5Y3 in place of the 5AR4 diode tube. The 5V4 dropped 30 volts compared to the 5AR4, but I only have one of them. ? Would a 5R4 be a drop-in replacement with these other types, or would I have to re-wire the recto socket? Vintage US and European 5R4G, 5R4W, 5V4G, and 5Z4 rectifier tubes in stock now, fully tested and guaranteed. Feb 5, 2009 · If you have an amp that is designed to use a 5AR4, you can use a 5V4 to bring the voltages down a little, it will be similar to the 5U4 but with the 2 amp filament current, also you can use a 5R4 instead of a 5Y3 to really lower the voltages. It has 3 12ax7's and 2 6V6's. Oct 31, 2009 · I'm aware of the fact that different types of rectifiers (i. Dec 10, 2022 · Re: GZ34S vs 5U4GB --- voltage drop question by M Fowler » Sat Dec 10, 2022 6:46 pm On my one recent Dlx Rvb build I tried 5ar4, 5v4, and 5u4 because the voltages were. May 16, 2011 · Well, my most recent order from Blue Strat showed up today (super fast shipping, thanks Mike!), and so I'm going to try the two NOS 5V4s vs. 5V4 or 5Y3, etc. May 22, 2020 · According to this page, the 5V4 is recommended by some guides as a replacement for the 5Z4, with the drop being similar (25V for the 5V4 vs. I know it has basically the same filament voltage draw as the 5AR4, and has more drop, but is there some other reason I shouldn't use it?. I went through my tube stock and had a 5U4, 5Y3 and 5R4. Tubes in the "Tube" column are directly replaceable with tubes in the "Replacement" column. So what does a GZ34 provide that 5Y3 doesn't. But I don't think Fender would have used both with the same power transformer if it wasn't designed to take it. Have you tried to replace the 5AR4 / GZ34 rectifier valves with 5R4GY? Although the valves have Mar 25, 2021 · RDH4 Page 1171 comes to the rescue showing that at 100mA the 5Z4 is ~190Ω while the 5Y3 is ~500Ω. So , unless the extra B+ will take your amp over the limit you are good. The amp calls for the 5AR4/GZ34 tube but mine has the 5Y3GT in its place. And I’ve used a 5V4 subbed for GZ34 in another amp. 5V4 looked Feb 29, 2004 · 5V4 and 5Y3 are for equipment drawing 100-120 ma max, and 5U4 and 5AR4 are for current needs of 225-250 MA. These tubes don't have Mar 27, 2013 · I have a couple nos 5v4 tubes just sitting around and I read that dr z says it's ok to use different rectifiers in his amps because he uses better iron. Something else to consider with a 5V4: if you check the spec sheet, you'll see that the max. a Ruby (Chinese?) 5AR4 in the Matchless this weekend. Dec 10, 2013 · Dubstep Girl's Massive 5AR4/5R4/5U4G Rectifier Review/Comparison! (Rectifer Tube Rolling thread) Home Forums Equipment Forums Jan 19, 2009 · I use a 5V4 in both my Silverface Champs (which have replacement Weber speakers). Radio tubes are valves. I have no experience in swapping them. Works great, and the still-good Mullard 5AR4 has been stashed away for the future. What is the reason for the change? It is a supply issue, for are there performance reasons? Jan 29, 2014 · Was doing some research on trying a 5V4 rectifier in place of the 5AR4 in my Allen Accomplice Jr. I did some research at kcanostubes and I don't see why I couldn't, but I wanted to get Aug 9, 2010 · Nostalgic Kit CentralTube Interchangability Reference The following should be direct substitutions. The 5V4 is indirectly heated, with slow warm up - like the GZ34, and that is a nice feature. I've seen enough of these in blackface amps that originally came with GZ34/5AR4s to know that the 5U4GB will work most of the time. Feb 17, 2003 · Before swapping rectifiers, read this. The more of a voltage drop (DCV Drop) you have the more sag or compression you will have. Feb 2, 2016 · Swapping 5AR4 rectifier for 274B in a PrimaLuna Preamp Long time lurker, first time poster. Although the the other two are closer in their ratings they are still not Feb 17, 2012 · The 5AR4 warms up in about the same time as the EL34's so there is no initial B+ spike at initial power up, which can be hard on the power supply capacitors and the output tubes. Quickly ordered some NOS tubes from a reputable tube dealer, can't remember the specific brand, but they're USA made. That's why I contacted Fender as I felt that the OT would handle the 3 ma vs 1. 0 amps of current but can only supply 175 mA of current. The 5U4GB takes about 50% more heater current, and decreases the voltage output a bit, as compared to a 5AR4. Mar 24, 2013 · My Cary SLI-80 integrated amp came with 5U4 rectifiers, and I am thinking of going to 5AR4's instead. What modifications will we need to make to use a 5AR4? 2. 8 ma of the 5AR4. g. Jul 13, 2009 · The 5AR4 handles as much current as the 5U4, and has as little heater draw as the 5V4. Can I swap my 5U4 with a 5AR4? The answer is Yes and NO. I even installed the "Yellow Sheet" mod just in case. Mar 17, 2005 · A 5V4 is right between a 5U4 and a 5AR4 (GZ34) in voltage drop. The 5V4 and 5AR4/GZ34 have slow warm-up times compared to the other rectifiers. This is a fairly large drop from the earlier solid-state rectifier. I don't know all the underlying theory, but it won't work. Rectifier Interchangeability and it's relation to Clean Headroom. The 5Z4 also comes in the ST and GT styles, but has slightly lower voltage drop (20v vs 25v). It all depends on your application. ) would typically require re-biasing of the power tubes in a fixed (or adjustable) bias amplifier ala the Fender '65 DRRI. 5U4: 3 amp heater, 275ma current 5V4: 2 amp heater, 175ma current 5AR4: 2 amp heater, 250ma current (close enough to the 5U4 for almost everything) You wouldn't want to use a 5U4 in place of a 5V4, because the extra heater current could damage the power transformer. The 5V4 is an octal version of the four pin 83-V tube. It took about two times as long, . Jan 23, 2023 · What am I missing here? The seller that I purchased my first Sylvania 6SN7 pair from on eBay is sending me a 5V4 rectifier to replace my Chickidy China 5Z4p and he suggested that I only use a 5V4 or 5AR4 rectifier tube in my Blue Velvet Pre, mainly because the current draw of the 5U4G and the surge could cause me some problems. Any meaningful sonic reason to consider a different tube? Anyone have a good source for NOS 5y3's? Apr 16, 2012 · 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? I have a Clark 5E3 that has overrated transformers. , 5AR4 vs 5u4G); in some case, changes were practically none. gcqf0ox 1we iva w3u xg p6yhj iglnv ajz7 tq11bo 2du9ru