ご質問致します。現在LUXMANのMB-300を使っておりますが、知人から整流管を、直熱管の5U4GBから、傍熱管の5AR4に交換した方が、電源を入れた直後の300Bに掛かる負担が小さいので、300Bの寿命が延びるよとア. The chart is most useful when you use it as a guide to the relative voltage drops of different rectifiers. Most Vox AC30 amplifiers have at least some hum, which is actually normal. '61 - B15n introduced, 5u4 rectifier, cathode bias, jensen P15n or C15n. My Cary 300SE/Sigs came with CV378(Mullard's 5AR4), however, the menual says using 5U4. Darren Riley's Guitar & Amp Shop. Audio Vacuum Tube List. Stright bottom Vs fat bottom: same 電壓, fat bottom has better sound. Audio tubes are a specialized breed and as such, we feel it necessary to create separate listings and pricing for these tubes. Not a single failure - I recommend this tube as an excellent replacement for any 5AR4 / GZ34 tube. Found 200 records in Search of Tubes Asylum. The Bendix is very good sounding and definitely more rugged than Mullard 5Y3's, but still less of a singing quality than the Mullards, which are still my favorite. John, the Ghia w/5v4 is a bit tighter, ruder, cleaner. I looked at the 5AR4 for that build, but I like the small size of the 6CA4 and its current handling is sufficient for my build. In the case of a 5U4, for instance, this is a savings of 15 watts. Tube Data Sheet Locator. Both are among the firmest, most efficient tube rectifiers commonly used in guitar amps, although they still present a little more sag than solid. p = Pentode Unit. Table of Contents. Looking to replace some tubes in your guitar amp? Sweetwater carries a huge array of guitar amp tubes for various purposes and styles. 5U4? I need a better understanding of the differences between these two rectifier tubes - I know they both drop 50 volts, but the current issues have me confussed. Posted by Hujo (A) on May 27, 2009 at 17:24:07 I recently changed from GZ37s to GZ34s as the rectifiers in my Cary SLA-70B amp. It enables organizations to make the right engineering or sourcing decision--every time. A GZ-34/5U4 and two 6L6GCs provide the clean power while the unique harmonic filter vibrato and classic preamp topology generate tones from spanky clean to Fillmore Gypsy. Register to access all of the benefits reserved to registered users or click on login if you are already registered. The G means glass, the early version is the 5U4G which is ST shaped. Discussion in 'Audio Hardware' started by Steve Hoffman, May 24, 2014. A pair of matched JJ or other brand 6V6 power amp tubes are used. You will need to check your bias afterwards and probably end up bumping it up a few ma. When installing a different rectifier tube, especially from one that gives a greater drop to one that has a lower drop (ex: 5U4GB to GZ34/5AR4), it will cause the amp to be biased differently. Truth umbilical of our own design. I've experimented with replacing the 5AR4 in my Lightning clone with a 5Y3 to reduce the current through the circuit (didn't care for the results) but going the other direction and increasing the current would be asking for trouble. This is a solid state replacement for 5U4, 5Y3 and 5AR4 Tubes. So if you use a 5AR4 in an amp designed for a 5U4 you will have higher voltages all around, which might exceed the ratings of the existing filter caps. The increase in voltages may be too much for the other components in the amplifier. Most tube testers can evaluate balanced plate sections in a heater-type rectifier tube. A rectifier is not in the signal chain and should have little if any effect on the tone. Tube and Bias Info. Another thought might be to go with SS diodes in place of the 5AR4 and install a damper tube where the 5AR4 was. GE 5AR4 Datasheet. Since it’s a replica of a ’57 model, the power valves are 6L6s rather than 5881s (used from ’58 to ’60) and they get their juice from a 5AR4 rectifier valve. Unbeatable prices on thousands of guaranteed vacuum tubes for sale, vintage NOS hi-fi audio tubes, radio tubes, ham and industrial ready to ship. Finding one cheap (especially since the launch of the heritage stuff) means it's usually one in need of some TLC and/or major repairs. The YJR converts your amp's vacuum tube rectifier to a solid state rectifier, reducing tube sag for a tighter sound and feel. com is to offer our consumers with the greatest vaping expertise feasible, helping them vape with style!. Dont have a schem for that amp so I am not sure which rectifier tube you have,but a 5AR4 (GZ34) will give you the "stiffest" or closest to a solid state or diode power supply. 60uf from the Amperex 5AR4 spec sheet. That 5U4 is a saggy tube. Classifieds: DEALER AD - Space-Tech Lab. I looked at the 5AR4 for that build, but I like the small size of the 6CA4 and its current handling is sufficient for my build. 022uF AB763 since less signal leaks to ground through that cap and the 6,8KOhm resistor. You can use the search to find service types or go to the service type lists that you can access from the page More Tube Related Stuff. External PS 9. Therefore, a 5AR4 would not be relevant to this discussion. GZ34 / 5AR4 EZ81 / 6CA4 EZ90 / 6X4 6202 EZ80 6V46 6V4 / EZ80 6AC4 / EZ81 6X4 / EZ90 GZ32 5V4G 5V4GA 5Y3GT 5Y4 5Y4G 5YUG 5Z4G / CV1863 Please contact for prices All test very strong No leaks or shorts Most are never used, some are used All test strong on my B+K tube tester (or would trade for EL 84 / 12BH7 / 12AX7's) Most are never used, some. Lawrence Bethune has done some listening with various 5U4GB's vs. Comparison: Tube Rectifier Shootout (5U4GB, GZ34, 5R4GY, 5Y3S) aornic. theo em thì hai bóng này tuy thay đổi cho nhau được nhưng hoạt động trong mạch amp thì khác nhau. You can dial in jagged if you want. High current power rectifiers. on February 8, 2017, Axalta presents, and will present, certain non-GAAP financial measures. MADE IN ENGLAND - BLACKBURN FACTORY, 1972 FEBRUARY One of the best ever made GZ34 , Really Very Hard to Find this condition, ' UNUSED ' Original box & inner packing paper Tested Very Strong on AVO MARK IV Tube Tester. 3 x 6922/6N1P/6DH8s and a 5Y3/5AR4/5U4 rectifier make up the tube complement. The three in question would be the Psvana 274B,their WE 1:1 Replica and the Sophia 274B mesh plate. Wondering if it is ok to use a 5y3 or 5u4 in place of a 5ar4 in my ST 120. I always thought "sag" was a good way to describe this difference. This is a very popular rectifier to use in place of 5U4, 5AR4, 5Y3, 5V4 and many others. But no way would I try a 5U4 in any amp not so designated specifically for it. Full Wave Rectifier After many failures of the JJ 5AR4 I tried these in my own amps. " and the dot pattern characteristic of GE tubes are etched in the glass. TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar players, DIY tube audio enthusiasts, and audiophiles. One of the reasons I like the specs on the Mullard is the lack of sag they apparently have versus the US branded 5AR4's. 8W for ECC88/6DJ8). The JAN 5U4GB is a high grade USA military tube, making it a well constructed, sturdy tube that you can put a lot of mileage on. There is a fair amount of model variance over the years (cathode vs fixed bias, 5U4 vs 5AR4 vs solid state rec, gain>tone vs tone>gain, double baffle vs single baffle vs theile cabs, added high/low switches, etc). First and second tubes are channel preamp and driver. 8 Pcs Winged C 6550 4 Pcs 6H30P-DR - 1980 made Nos Tubes Totaly: 12 tubes All tubes d. If you want softer response, more sag and bluesier sound then use the 5U4. AB763 vs AA763. The YJR is a direct plug-in replacement adapter for use in most amplifiers that use 5AR4/GZ34, 5U4, 5Y3 or similar full-wave rectifier tubes. Hi Luis, Let’s take a look at why a standby switch is included in most amps and see if your technician has given you some sound advice. (!!) 53KU=GZ37=CV378 Cossor Valve UK brown base used/tests very good 1948-1953 small mica flake inside tube, small rattle inside base (50/40 and 51/40). I replaced the Mesa/Svet 5AR4 with an old coke bottle 5U4 in my silver face Princeton Reverb and got the hugest sound. 5720-J Capital Blvd Raleigh NC 27616 phone (919) 877-0841 [email protected] One of the reasons I like the specs on the Mullard is the lack of sag they apparently have versus the US branded 5AR4's. JJ Electronic - Vacuum tubes, Capacitors, Amplifiers. Audio Research REF-110 Power Tubes Set - Winged C 6550 + 6H30P-DR Super Tubes. Don't know if the audio will work out but I can hear the differences. MADE IN ENGLAND - BLACKBURN FACTORY, 1972 FEBRUARY One of the best ever made GZ34 , Really Very Hard to Find this condition, ' UNUSED ' Original box & inner packing paper Tested Very Strong on AVO MARK IV Tube Tester. I'll monitor this one, and update the review if it's warranted. For example at about 200ma the 5r4 will drop approx 65 volts, the 5u4 45 volts and the 5ar4 20 volts. Obviously this will impact on the circuit following the rectifier. The earlier BF GZ34 driven amps having a stouter Reverb and Vibrato tone. It is quite obvious that the RH84-PPE lacks “universality”. Note: The Chinese 5Z4, 5Z4P and 5Z4G can sometimes be replaced with a US NOS 5Z4, 5Y3GT, 5U4G, 5R4, and even 5AR4. KT88/6550 Compatible Single Ended Amplifier 5th Jan 2014 (using fladance mp player) 8W rms. For a 5AR4 I believe it's around 40uF, so there's a good chance the 5U4 isn't going to work if the amp was designed for a 5AR4. Found 200 records in Search of Tubes Asylum. The big difference is the 5U4G filament draws over 50% more than the A5R4. Be sure to check with an amp tech before swapping different tubes. on February 8, 2017, Axalta presents, and will present, certain non-GAAP financial measures. The Princeton Reverb is. on 2002-12-22, 21:40:47 (64. When installing a different rectifier tube, especially from one that gives a greater drop to one that has a lower drop (ex: 5U4GB to GZ34/5AR4), it will cause the amp to be biased differently. Tube List. The 5AR4 can handle about 10% more current, and the 5U4G can handle a bit more reverse voltage, but neither is enough to really make a difference. almost same 6. 5U4G Mesh Data Sheet 5Z3 Mesh Data Sheet. I've looked at the 6CA4 and the 5AR4. Sort of a rare circuit I have had a blackline SF Dual Showman wth an AB165 BAssman tube chart. ) The 5AR4 drops about 17 V and the 5U4GB drops about 50- 55V. 2) 5AR4/GZ34 3) GZ37 (3 amp filament current) 4) 5V4G/A (Possibly lower if plate current of the power tubes is high enough) 5) 5U4/G/A/B (3 amp filament current) 6) 5R4G/A/B 7) 5Y3G/B And for the whole article: Rectifier comparison and interchangeability chart | KCA NOS Tubes & Amplifier Repair. All I know are of outstanding quality. I believe the 5AR4 is actually a superior tube. NOS Valvo GZ34 / 5AR4 double D Getter made in Holland early 1960s, same as second version of base metal type. All MWI M-type capacitors in signal path. New NOS electron receiving tubes for antique radios are available from Ken's Electronics, (Wholesale & Retail Electronic Parts) Kalamazoo, Michigan at reasonable prices. I've experimented with replacing the 5AR4 in my Lightning clone with a 5Y3 to reduce the current through the circuit (didn't care for the results) but going the other direction and increasing the current would be asking for trouble. p = Pentode Unit. Use when less 'sag' is desired in the power supply; just switch back to the tube rectifier when 'sag' is desired. Hi, Can anyone tell me what the differences are between the following tubes? 5U4 5U4G 5U4GA 5U4GB. The tonal difference is remarkable. Many vintage amp owners blew their power trans when substituting a 5U4 for the hard to find, expensive 5AR4 (particularly before Russian/Chinese tubes arrived on the scene). 3 x 6922/6N1P/6DH8s and a 5Y3/5AR4/5U4 rectifier make up the tube complement. Top–notch Schumacher transformers are used, with three Groove Tubes 12AX7s, a 12AT7 reverb driver and a 6V6 output pair. on February 8, 2017, Axalta presents, and will present, certain non-GAAP financial measures. Of the common rectifiers, I prefer the 5AR4 for its slow-start capabilities (it ramps up the juice from the PS over a few seconds as opposed to instantaneously with tubes like the 5U4), then the 5R4. Weber Copper Cap Rectifiers are solid state rectifier replacement devices for use in place of vintage tube rectifiers. Obviously this will impact on the circuit following the rectifier. (Direct filament vs. "Then we went back to the WE 274B structure design as a starting point, and in an unexpected way we figured out a way to solve the Western Electric limitation of 4uF. The power supply is the most important part of the amplifier because, ultimately, it is the power supply that dictates the limitations of the amplifier as a whole. For this reason, the 5U4 (and other tubes like the 5Y3 or 5R4) are ideally used with a center tapped heater winding. Drop-in Equivalents & Substitutes: 5U4. I had a spare JJ 5AR4 so I'm using that one now, and so far, no signs of trouble. Darren Riley's Guitar & Amp Shop. 33) Posted by Robert H. Some styles demand this kind of snap and twang. A low-noise, low- microphony 12AX7 or 7025 is recommended. The Westinghouse logo of this canadian valve is clearly seen in the main image. Tube Data Sheet Locator. This is usually done to give the amplifier a tighter, more aggressive sound and feel. Product Description. He report: "The 5U4's are give the amp a crisp and immediate response. Solid State direct replacements are more efficient than vacuum tubes. DO NOT use 5AR4, GZ34, 5V4 or 5Y3. Audio tubes are a specialized breed and as such, we feel it necessary to create separate listings and pricing for these tubes. We know that the 5U4 drops more voltage than the GZ34, yet both schematics show 415 DC at the output tube plates. The 5U4 has a little higher ratings and is generally more rugged construction. Octal, IO) K8A, USA 1935 and Power-supply shown. The tubes I run are: WE 422 Rectifier WE 421 Outputs (5998 equiv) Tung Sol 6f8g RP Driver (a 6v tube, via an adapter) Sound. the other?. com offers no-interest financing for six months via PayPal Credit. My build runs one 6SN7/12SN7/1633 driver, two 6080/6AS7/5998/6336 output tubes, and one 5ar4/GZ32/GZ34/GZ37/5u4 (etc) rectifier. It would be used for all types of medium power equipment and was used extensively in 1940's equipment. They produce a similar voltage drop to 5U4 rectifiers but require only 2 amps of heater/filament current from the power transformer as opposed to 3 amps for a 5U4. Like I said,if one is somewhat weaker. Just be aware that going from a 5U4GB to the GZ34 will likely increase the B+ voltage by around 30v. 5AR4/GZ34 types are getting expensive for NOS and new production tubes are not that good, although I like the Sovtek the best. Dubstep Girl's Massive 5AR4/5R4/5U4G Rectifier Review/Comparison! (Rectifer Tube Rolling thread) Discussion in ' Headphone Amps (full-size) ' started by dubstep girl , Dec 10, 2013. Many tubes from which I knew that they worked for many years still test as new tubes. I have had a 1957 NAD Mesa Boogie Express 5:50+. The YJR converts your amp's vacuum tube rectifier to a solid state rectifier, reducing tube sag for a tighter sound and feel. For a 5AR4 I believe it's around 40uF, so there's a good chance the 5U4 isn't going to work if the amp was designed for a 5AR4. "Then we went back to the WE 274B structure design as a starting point, and in an unexpected way we figured out a way to solve the Western Electric limitation of 4uF. 6SJ7 pentode specified, NOT a triode. ご質問致します。現在LUXMANのMB-300を使っておりますが、知人から整流管を、直熱管の5U4GBから、傍熱管の5AR4に交換した方が、電源を入れた直後の300Bに掛かる負担が小さいので、300Bの寿命が延びるよとア. 174) Being a 2v current draw, it is closest to a 5R4, but electrically, in terms of voltage drop it is midway between a 5R4 and 5U4, closer to a 5R4, but really it is neither. The filament supplies to the audio chassis are all dc, with the 300B's each having its own constant current filament supply. The Sovtek 5AR4 rectifier has a rise time from 300-400 volts that is about 1/2 that of a 5U4 tube. For the 5Y3, this resistance is around 400 Ohms. GZ34 vs GZ37. Use when less 'sag' is desired in the power supply; just switch back to the tube rectifier when 'sag' is desired. Direct current (DC) is needed to operate all of the circuitry in a guitar amplifier. 1 - GZ34/5AR4. Click here for info. You can dial in jagged if you want. Appendix A Useful Formulas and Equations the 5AR4, 5U4-GB, 279. if using as single ended amplifier as EL34 ,can be use 6L6. This is ok so long as you don’t use the old metal can 6V6s or the shouldered 6V6. 53KU was designed to replace 5U4G instead. 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. , 5AR4 vs 5u4G); in some case, changes were practically none. This tube should be of good quality. Is there any difference between a 5U4, 5U4G and 5U4GB as the latter two seem to be the more commonly available?. I was looking at my Pro Reverb today to get an idea of what repairs/mods need to be done (finally preparing to do the AA165 conversion), and while I was removing the tubes I noticed that the rectifier (an old Mullard) says "GZ34/5AR4" on one side, and "5AR4" on the other side. 5AR4 / GZ34 Tube Types are in stock and ready to ship! Javascript is disabled on your browser. Fittingly, the 18-watt power rating sits between the MOD 84’s 15 and the AST’s 20, and like the latter, the Antares can be run with 6L6s too. I looked at the 5AR4 for that build, but I like the small size of the 6CA4 and its current handling is sufficient for my build. The only NOS valve dealer with a real webstore. (Direct filament vs. The 5U4G rectifier delivers 100 Watts of DC power. almost same 6. 5720-J Capital Blvd Raleigh NC 27616 phone (919) 877-0841 [email protected] I had been using a new Electro Harmonix 5U4 rectifier tube, but recently was able to try out a new SovTek 5AR4. 8 450 375 37 Yes. The difference between the two times is probably as a result of the direct vs indirect heating of the cathode. It made a bit of clarity difference but took away some warmth. the 5U4 being a problem. The Cool Sound of Tubes by Eric Barbour & IEEE Transistors vs Tubes - Feature Comparison adapted from IEEE & Eric Barbour. 8 450 375 37 Yes. Tested at the Mesa Boogie factory in California. IIRC, a 5Y3 passes ~125ma of current and a 5AR4 passes ~225ma. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. Rectifier tubes (5AR4, 5Y3, 5U4, etc. I had a spare JJ 5AR4 so I'm using that one now, and so far, no signs of trouble. You've got some ears!The only difference in "tone" I can say I've ever noticed between rectifiers is more sag from a lower power rect. '62 - Navy Random Flair tolex changed to Blue Check '63 - solid state rectifier, can cap added in line w/ tubes, jensen EM1500 '64 - 5ar4 rectifier, CTS speaker '65 - cabinet design changed from double baffle to single baffle, amps switched to fixed bias. GZ34 / 5AR4 EZ81 / 6CA4 EZ90 / 6X4 6202 EZ80 6V46 6V4 / EZ80 6AC4 / EZ81 6X4 / EZ90 GZ32 5V4G 5V4GA 5Y3GT 5Y4 5Y4G 5YUG 5Z4G / CV1863 Please contact for prices All test very strong No leaks or shorts Most are never used, some are used All test strong on my B+K tube tester (or would trade for EL 84 / 12BH7 / 12AX7's) Most are never used, some. The Sovtek 5AR4 rectifier has a rise time from 300-400 volts that is about 1/2 that of a 5U4 tube. Common examples of filament-type rectifier tubes would be 5W4, 5Y3, 5U4, 5R4, 80, 83, etc. ) The 5AR4 drops about 17 V and the 5U4GB drops about 50- 55V. Some will argue this is a bad thing, and I'll go along with that for the most part. The tube rectifier can easily be swapped back in when sag is desired. 5U4GB? generally the 5AR4 IME appears to have significantly lower internal losses and hence less voltage drop than a 5U4 at a given. Zoom out and see the bigger picture, or focus in on an unprecedented level of granular data. I'll monitor this one, and update the review if it's warranted. The Princeton Reverb is. I've looked at the 6CA4 and the 5AR4. During its long and storied run the princeton line of amps with 2 band tone controls udnerwent few significant revisions. The circuit was taken from the RCA Receiving Tube Manual RC-19 of 1959, with slight modifications, and is typical of nearly all high-fidelity tube amplifiers. Perhaps you mean Bendix 6106? Anyhow, I'm using a Bendix 6106 in the original CSP (not yet upgraded to a CSP2). Many tubes from which I knew that they worked for many years still test as new tubes. You've got some ears!The only difference in "tone" I can say I've ever noticed between rectifiers is more sag from a lower power rect. Located in New York City and in service since 2015, our experts are a custom vaping warehouse store offering all kinds of vape mods, e-liquids, nicotine salts, capsule systems, storage tanks, coils, and other vaping accessories, including electric batteries and. "Then we went back to the WE 274B structure design as a starting point, and in an unexpected way we figured out a way to solve the Western Electric limitation of 4uF. 5AR4 - NOS, Philips. 5u4であればb電圧そのものは5秒以内に立ち上がっているはずです。 ちなみに、5u4gb→5ar4に変更すると、もう10v程度は稼げ. It is really nice with a strat and a silver bell. Weber Copper Cap Rectifiers are solid state rectifier replacement devices for use in place of vintage tube rectifiers. I also keep this in my first aid kit when I'm playing out. 450 V for the 5AR4. Power tubes potentially have the same issue. 5AR4 / GZ34. The YJR is a direct plug-in replacement adapter for use in most amplifiers that use 5AR4/GZ34, 5U4, 5Y3 or similar full-wave rectifier tubes. Sophia Electric™ 274B/274A Rigid & Mesh Plate Valves Sophia Electric™ 274B valve is a premium rectifier valve for a 5U4/5R4/5AR4* direct replacement with 3X longer plate structure, thus it has a deeper, wider sound stage and even smoothier sound than Mullard 5AR4. Introducing the All New Michael took some of the best qualities of the MOD84 and Atomic Space Tone to create this new Tone Monster Twin 6V6/6L6 • 3-way EQ • Tube Reverb/Tremolo Tube Rectification 5AR4/5Y3/5U4 Holographic, harmonically Rich Cleans with Excellent Power Tube Break-up when pushed. The amp worked fine for 5 or 6 years. Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts. Octal, IO) K8A, USA 1935 and Power-supply shown. Our recommendation in a sparkling 4×10″ Super Reverb is the lower cap value that allows more beefy tones. 174) Being a 2v current draw, it is closest to a 5R4, but electrically, in terms of voltage drop it is midway between a 5R4 and 5U4, closer to a 5R4, but really it is neither. Amazing feel and exceptional overall quality make this our factory. 1 - GZ34/5AR4. There is a single set of SE inputs and no pre out or any other features in that regard. Most Vox AC30 amplifiers have at least some hum, which is actually normal. Simply put, you have to hear it to understand how BIG this thing sounds. on 2002-12-22, 21:40:47 (64. Watford Valves, one of Europe's leading suppliers of tested, graded and guaranteed valves to the professional music industry. You've got some ears!The only difference in "tone" I can say I've ever noticed between rectifiers is more sag from a lower power rect. 5U4GB? generally the 5AR4 IME appears to have significantly lower internal losses and hence less voltage drop than a 5U4 at a given. Wondering if it is ok to use a 5y3 or 5u4 in place of a 5ar4 in my ST 120. Rectifier options include 5AR4, 5U4, and 5Y3 for most sag/compression and sweetness. For a rectifier in the VTA ST-70 you can use a 5AR4/GZ34, Weber WZ34, Weber WZ68 or a 5U4. This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. The AA763 using the GZ34/5AR4 and the SF AB868 (and later) going to the 5U4GB. I don't know, maybe there are yet other variations of these, but I would like to know if they are equivalent to each other and whether or not they are completely interchangeable. what you are looking to get out of it. Tube and Bias Info. We know that the 5U4 drops more voltage than the GZ34, yet both schematics show 415 DC at the output tube plates. Dubstep Girl's Massive 5AR4/5R4/5U4G Rectifier Review/Comparison! (Rectifer Tube Rolling thread) Discussion in ' Headphone Amps (full-size) ' started by dubstep girl , Dec 10, 2013. 有人動了以較通俗的 5u4 來替代 (或想用 5ar4 替代 5u4) 的腦筋。 不過,5ar4 是旁熱管,和 5u4 的直熱管不同, 如果管機的功率管是旁熱式 (如 : kt88、el34),最好別用 5u4 替代。 另外,5ar4 比 5u4 電流小,原本用 5ar4 者,也最好別用 5u4 替代,. Lastly, with regards to the power supply (and a slight return to the output stage). Here one anode is seen face-on. Shop with confidence. Probably not a good replacement for the 5AR4 in most cases. Tube data & amp schematics onlineTubes and Parts for Hi-Fi,Radio,Guitar,etclinks to Tube Amp info on the web. One thing that confuses me, when you look at the BF vs. The 5U4 (filament rectifier w/comparitively high voltage drop) should actually drop more B+ volts under load than the 5AR4 (cathode-type rectifier with comparitively low voltage drop), so the B+ applied to those 6V6's (and the rest of the amp) should be lower, with somewhat lower current draw as a result. I still really like this tube, and JJ tubes in general. A 5U4 will work fine but will drop the amp's B+ a little and, as such, will restrict overall power somewhat. the spirit of rock-n-roll速. The YJR converts your amp's vacuum tube rectifier to a solid state rectifier, reducing tube sag for a tighter sound and feel. I have never heard of any "consensus" between 5AR4 or 5U4. The JAN 5U4GB is a high grade USA military tube, making it a well constructed, sturdy tube that you can put a lot of mileage on. Dubstep Girl's Massive 5AR4/5R4/5U4G Rectifier Review/Comparison! (Rectifer Tube Rolling thread) Discussion in ' Headphone Amps (full-size) ' started by dubstep girl , Dec 10, 2013. I understand the whole reason for going from the 5U4 to the 5AR4 is the direct heating of the 5U4 shortens the life of the output tubes whereas the 5AR4/GZ34 is much easier on the tubes. Zoom out and see the bigger picture, or focus in on an unprecedented level of granular data. Obviously this will impact on the circuit following the rectifier. ご質問致します。現在LUXMANのMB-300を使っておりますが、知人から整流管を、直熱管の5U4GBから、傍熱管の5AR4に交換した方が、電源を入れた直後の300Bに掛かる負担が小さいので、300Bの寿命が延びるよとア. Really, the biggest difference I've seen in the circuitry of the BF and SF DR is the rectifier. Free UK Delivery on orders over £150 5AR4/GZ34 Rectifier. My anthem has originally had a 5AR4 but came with a JAN 5Y3GT in the power supply. The white print on the glass has the GE logo. GE 5AR4 Datasheet. Tube and Bias Info. Perhaps you mean Bendix 6106? Anyhow, I'm using a Bendix 6106 in the original CSP (not yet upgraded to a CSP2). It would be used for all types of medium power equipment and was used extensively in 1940's equipment. The amp worked fine for 5 or 6 years. We got a stash of them and they are incredible. Split Ground Bus. 53KU was designed to replace 5U4G instead. The 5U4 has a little higher ratings and is generally more rugged construction. hx = Hexode Unit. That 5U4 is a saggy tube. Amplifier was designed utilizing four tubes, one 6N1P (Input), two 807 (Output) and 1-5U4 (Rectifier) can be substituted with 5Y3, GR34 or 5AR4. The very hard to find Holland made 5R4 rectifier that will replace any 5R4, 5U4, 5AS4, 5T4 and even the expensive 5AR4! This tube has been reported to outperform the Mullard and Amperex 5AR4/GZ34 tubes that cost more, and will be an incredible improvement in any equipment that uses any of the above mentioned tubes. Rectifier options include 5AR4, 5U4, and 5Y3 for most sag/compression and sweetness. GE 5AR4 Datasheet. This is the earliest philips brand of 5AR4=GZ34=CV1377. Following on from my earlier review, this tube did actually arc on me a few days ago. 022uF in AB763. Tube data & amp schematics onlineTubes and Parts for Hi-Fi,Radio,Guitar,etclinks to Tube Amp info on the web. The 5AR4 / GZ34 was always a better tube rectifier for Quad-II and allowed 33uF + 33uF instead of original 16uF+16uF caps. This little guy has been the secret weapon of an entire range of artists, from Ryan Adams to Glen Campbell and Tommy Tedesco to Jim Campilongo. I had always considered the 6CA4 a low loss regulator but the 5AR4 really blows it away. Weber Copper Cap Rectifiers are solid state rectifier replacement devices for use in place of vintage tube rectifiers. Octal, IO) K8A, USA 1935 and Power-supply shown. This is a list of tube types that some popular amps take. 8 450 375 37 Yes. A tube rectifier will also give you a few less volts in the power supply. (IH) rectifiers: U52, 5U4 (5U4G). The stock Stereo 70 power transformer is marginal to begin with, and hanging more filament draw on it can't help its longevity. I guess my preference would be for the older 5U4G ST-type tubes from RCA and Sylvania. An excellent replacement for any GZ34 tube. The power supply is the most important part of the amplifier because, ultimately, it is the power supply that dictates the limitations of the amplifier as a whole. " and the dot pattern characteristic of GE tubes are etched in the glass. Tube Cross-reference Guide. Only one 5U4 sparked, and it still sparked with the 22uF cap so I assume that it was a bad tube. Many of these items have been discontinued by the manufacturer. The 5AR4/GZ34 makes about 20v more in my SFSR. Audio Vacuum Tube List. The YJR is a direct plug-in replacement adapter for use in most amplifiers that use 5AR4/GZ34, 5U4, 5Y3 or similar full-wave rectifier tubes. When installing a different rectifier tube, especially from one that gives a greater drop to one that has a lower drop (ex: 5U4GB to GZ34/5AR4), it will cause the amp to be biased differently. SUBSCRIPTS FOR MULTI-UNIT TUBES: b = Beam Power Unit. Many viewers of this site have found the regulated power supply and amplifier is too complex for their taste. Does this analogy hold up: the 5R4 is to 5Y3 what the 5U4 is to the 5AR4?. As mentioned a number of times, the SF and newer DR amps used a 5U4 and the PT was slightly overwound to compensate for the additional voltage drop of the 5U4. To view this site, you must enable JavaScript or upgrade to a JavaScript-capable browser. Both are among the firmest, most efficient tube rectifiers commonly used in guitar amps, although they still present a little more sag than solid. Most of the time they are interchangeable, but make sure to verify that with your particular amp!. 2) 5AR4/GZ34 3) GZ37 (3 amp filament current) 4) 5V4G/A (Possibly lower if plate current of the power tubes is high enough) 5) 5U4/G/A/B (3 amp filament current) 6) 5R4G/A/B 7) 5Y3G/B And for the whole article: Rectifier comparison and interchangeability chart | KCA NOS Tubes & Amplifier Repair. theo em thì hai bóng này tuy thay đổi cho nhau được nhưng hoạt động trong mạch amp thì khác nhau. The 5AR4 (and to a lesser degree the 5V4) have a much lower voltage drop at maximum signal due to their indirectly heated cathodes. When you change the rectifier tube in an amp, it changes the voltages in an amp. The Westinghouse logo of this canadian valve is clearly seen in the main image. Tube and Bias Info. 5AS4 / 5AS4A Full-Wave Rectifier (Higher Max DC output current and peak current per plate than 5AR4, but 5AS4 is directly heated, recommended as an upgrade for a 5U4GB) - Sun Audio SV300B-MKII - Meixing Ming Da mc-7r 2006 pre - Audio Note Mono amps. The 5U4 tube has slightly more voltage sag with current draw than a 5AR4/GZ34. Here one anode is seen face-on. p = Pentode Unit. The 5U4 (filament rectifier w/comparitively high voltage drop) should actually drop more B+ volts under load than the 5AR4 (cathode-type rectifier with comparitively low voltage drop), so the B+ applied to those 6V6's (and the rest of the amp) should be lower, with somewhat lower current draw as a result. I usually tend to use 5U4GB's as the rectifier when needing a high current tube rectifier and account for the larger voltage drop with the correct transformer however the 5AR4/GZ34 is a good tube as well. You can use the audio out from an iPod, CD, DVD, MP3, Computer, TV, XM or SIRUS to the input connection. Tube type list The following list shows the tube types I have entered in my database, with exception of the service types (e. Tube amp Theater 5u4 vrs 5AR4 GZ34 Tube Guitar amplifier by D-lab - Duration: 5:53. The earlier BF GZ34 driven amps having a stouter Reverb and Vibrato tone. As the power stage is pushed and plate voltage drops the internal resistance also drops. 5V4 and 5Y3 are for equipment drawing 100-120 ma max, and 5U4 and 5AR4 are for current needs of 225-250 MA. 5ar4 gz34 450v 5v/1. Of the common rectifiers, I prefer the 5AR4 for its slow-start capabilities (it ramps up the juice from the PS over a few seconds as opposed to instantaneously with tubes like the 5U4), then the 5R4. Welcome to Duncan's Amp Pages! This is an internet resource for those interested in guitar amplifiers, vacuum tubes, and design tools such as SPICE modelling. External supply available with optional hole to allow for use of taller, larger diameter tubes other than 5AR4/GZ34 (just. I had a spare JJ 5AR4 so I'm using that one now, and so far, no signs of trouble.