Kt88 Bias Chart

Also the most common electrical circuits are given for KT88 and 6550. Different rating or performance. No change in bias would indicate other problems, such as poor system grounding, an unstable preamp, a shorted speaker, etc. Testing has been carried out with these tubes so far, 6L6, 6V6, 6F6, EL84 and a EL34. It was originally equipped with (6) 6146 tubes in the PA stage but due. The pin out is the same. 5881 Nobsound Vacuum Tube Amp Amplifier Plate Bias Current Probe Tester 8 Pin Socket for EL34 6550 6L6 KT88 CT1-C, Cathode Current. now the ones I installed are the electo-harmonix ones got a great deal,and would. This is done with a resistor in the cathode circuit. A "black silver" version is also available with silver knobs and black front plate. 52) Posted by Jim McShane on 2004-04-13, 14:55:50 (68. Came with 6550’s (seller said biased for them). Simply import the data and create a scatter graph. Customer Service M-F 9am-4pm CT. and British musicians in favor of which are modified and uprated in power dissipation rating from their KT88 and EL34 prototypes. It adds ultra-fast Hexfreds to the power supply as well as other custom Jolida parts. More Single-Ended KT88 and 6550 Tube Amplifiers. The low and medium gain sounds are balanced and spacious, while the clean tones can be pristine, chunky, crisp or edgy. The 6550 Maximum control grid resistance for fixed bias is 50K. There are some scratches, dings and chips in paint. TAD has sold various models of KT88s, so see what is in your amp, and try to get the exact same type if possible. Thanks Ian and Kirk. It is intended for audio frequency power. KT77 is, was, sorta British for kickass 6CA7. 10-09-2015 10:18pm. The station tests power tubes for short circuits, heater operation and the electrical characteristics of Plate Current (Ip) and Transconductance (Gm). The dynamics are unlike anything we have ever heard before. The bias controls adjust the bias of the tube which they are joined to by the lines. Housed in a compact, handsome and rugged black case. 3V * HS-5348-1 * Bias 3. If you want to bump the bias up a little higher, you are welcome to do so but the amp won't really sound any better and tube life will go down. This may seem like sheer madness, but, thanks to manual bias adjustment, it presents no threat to either the tubes or the integrity of the Bruce Moore amp. The bias tube dial is a slightly different color so this may have been replaced at some point as well. the-Wall Speaker Enclosures Unlike treble and mid-range tones, which are directional, bass tores are non~directional and ordinarily travel along two routes on the way to your ears- resulting in partial cancellation. 2) 5AR4/GZ34. Cayin A-88T MK2 tube EL34/KT88/6550 Integrated amplifier audiophile power amp $1,449. Customer Service M-F 9am-4pm CT. A pair of KT88 output tubes per channel provides a modest power output of about 45Wpc. Kavin's stash). Debuting in 1969, the 400 PS was a behemoth conservatively rated at 435 watts RMS. We now have a modification to the Jolida JD-1000P power amplifier. Single-Ended: 23. The paralleled first stage feeds a driver stage featuring. When biasing to 70% or whatever percent you're looking for you simply multiply the answer by that number divided by 100. B Holes labeled “B” are the location of the bias controls. Noise reduction. EL34 tube produces smooth highs with pleasant mids in guitar amps. The EL84 can be brighter than the EL34 and generally has a bit less low-end. The Bias Easy™ 800 measures the current in the power tubes of your amp. class – A – all power tubes patent full auto biasing ( pre selectable ) CHALLENGER 115 / 145 Watt using 6 x El34, 180 Wat using 6550 ( China brown socket – recommend ) – no use “JJ” brand. Different rating or performance. Warning: Substitutes are given as a guide only - please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. there used to be a link on the Fender website for amp dating from the serial numbers. One of the DSPs on the circuit board of Fractal Audio's amp modelers is devoted to amp modeling. Only the highest quality and most consistent vacuum tubes earn the MESA Engineering® seal of approval. America's Largest FREE Audio/Hifi and Home Theater classifieds site. How you operate the tubes (push-pull, push-pull parallel, ultra-linear, class, B+, bias, operating points, etc. Run in class AB1 push/pull, a pair of KT88's are capable of producing 100 watts at 2. This may seem like sheer madness, but, thanks to manual bias adjustment, it presents no threat to either the tubes or the integrity of the Bruce Moore amp. Groove Tubes GT-6L6R Russian Power Tubes - Medium Quartet 6L6 Power Tubes $117. com 6L6GC a. 5 hp 3530 rpm ACmotor GE 9T23B3873 Dry-Type Transformer 45 KVA NEW General Electric 150 a 3 Pole Breaker THED136150WL GOOD USED GE GENERAL ELECTRIC 200A 600V CIRCUIT BREAKER TJJ436200WL GUARANTEED! GE RMS-9 MicroVersTrip Programmer. FREE Returns. Housed in a compact, handsome and rugged black case. #2 is shared by the rhythm and lead channel. 24 USD $536. A large change could indicate a damaged KT88 tube. supply was easily able to supply 150mA+ into a KT88 under test. 10-09-2015 10:18pm. 39 (9) Belton Octal Tube Tension Clip. This rugged tube also found a home in the '59 Fender Bassman and servo amplifiers used in B-52 bombers. Not to be confused with Russian made KT88. The $450 Maxi-Matcher contains four tube sockets and can test output tubes, such as the popular 6L6, and 5881, 6V6, 6550, EL34, KT88, EL84 and 7027s. 66: JTM45 MKIV 1962: 7304: Black Levant: 784-103: 1202-55: U Frame: Aluminum (End Blocks) Bulgin: 8,16,100V Jumper Style: Yes. We have found the Surgical Steel to be a stellar pedal platform for 6 string guitar, as it's high headroom and near endless sustain offers the perfect canvas for a variety of effects pedal configurations. 3 HS-5348-1 Bias 1. 99 previous price $19. EL34 Substitutes. -new CP tubes sometimes suffer from bias drift until there burnt in, -I bias all my amps hot, I've been abusing the hell out of the GL KT88's for over 5 years, -a bias of 73 shouldn't of cooked anything, sounds like bad tubes and Marshall covering there ass and taking no responsibility. Sounded great, after a while I chose and swapped in some KT88’s. Distributed by parts distributor Magic Parts, the Maxi-Matcher is a handy, comprehensive tube tester that allows for precise matching of output tubes in terms of bias and transconductance. This is required in all "fixed bias" amps when new power tubes are introduced. Circuito VBS, bias autoregolante per la massima linearità. Illuminated roll chart features a smooth action thumbwheel drive. Instructions and part list are also included. I tried using the 667-7511 settings for 6550s, but the Genelec KT88 (NOS) seems to require a different bias. The circuit allows for adjustment of the bias (the 25 ohm variable resistor) but the EH tubes do not stay in sync. Re: Biasing KT88's and/or KT120's in a VTA ST-120 - The. Plate Voltage: Hot (70%) Avg (60%) Cool (50%) 200V: 42mA: 36mA: 30mA: 225V: 37mA: 32mA: 27mA: 250V: 34mA: 29mA: 24mA: 275V: 31mA: 26mA: 22mA: 300V: 28mA: 24mA: 20mA. (KT88, KT120, and KT150 pentodes can also be used, to respectively provide 40Wpc, 44Wpc, and 48Wpc). I have used a couple of amps in the video and made cathode c. All the vacuum tubes are covered by a 12-gauge stainless steel wire cage with a black powder coated finish. Additional types may be written based on demand. 7 ma U g1 = -15 V S = 11,5 ma/V R i = 12 kΩ µ-g1-g2 = 8 Triode Connected U a, g2 = 250 V I a+g2 = 147 ma U g1 = -15 V S = 12 ma/V R i = 670 Ω µ = 8 Red/Blue versions available max 125,0 max 52,0 max 110,0. My 6000A chart is the same as yours - a 6U8 and a 7189, no "A" version of either one. The KT88 fits a standard eight-pin octal socket and has similar pinout and applications as the 6L6 and EL34. at Desertcart. 新卒者、未経験者の方へ。. Two easily overdriven cathode-bias 6V6 output tubes deliver a sweet, harmonically rich tone, and the 5Y3 tube rectifier has the sag required for dynamics and touch sensitivity. ティーコーポレーションでの働き方、会社に関する情報を掲載しています。. This equals. The $450 Maxi-Matcher contains four tube sockets and can test output tubes, such as the popular 6L6, and 5881, 6V6, 6550, EL34, KT88, EL84 and 7027s. It isn't used in guitar amps as often as it is in hi-fi audio amps, but that being said, I know a few guys who totally swear by the KT88. Housed in a compact, handsome and rugged black case. Compare to most of others EL84s I should to boost the bias much hotter. Hickok always listed the 6550 under KT88. jpの国際ニュースについてのページです。. This webpage offers two ways to calculate tube bias and plate dissipation. Apart from Craig's octupler (x8) ruminations , I have been looking at an end -driven hextupler (x6) which makes a bias supply a conventional doddle. KT90 and types and brands exist, and what you can do with the this tube. The citation, while lovely, sounded almost flat and uninvolving compared to this KT88 amp with the fully regulated high voltage supplies for each channel and the adaptive bias system. Groove Tubes GT-6L6R Russian Power Tubes - Medium Quartet 6L6 Power Tubes $117. The purpose of this KT88 / KT66 /6550 / KT90 / KT120 page is to give an overview about what KT66, KT88. It is generally associated with higher brain functions such as conscious thought, and sensory processing. A pair of KT88 output tubes per channel provides a modest power output of about 45Wpc. By using this website, you agree to our use of cookies. The Delta 88 will take its place on top the Dr. Original NOS tubes, Mullard, RCA, Bugel Boy, etc Non-original soft case / cover included. 4 KT88/6550/KT90/300B or 4 x EL34, 5881, 6L6GC, 807. the-Wall Speaker Enclosures Unlike treble and mid-range tones, which are directional, bass tores are non~directional and ordinarily travel along two routes on the way to your ears- resulting in partial cancellation. My '77 JMP 2203 is biased to 40mA per tube. TUBES To create a push pull amplifier is possible to use triode and pentode but obviously to test many configurations like the ultra linear we need a pentode. Dynaco Mark III restoration and modification. 8k : 5 ohms with 44T x 50S core, all details. It tests for Shorts, leakage Grid contamination, Grid Emission & Quality. The 12AX7A vacuum tubes are for the Balanced and Input amps, while the 12AT7 tubes are for the Voltage and Driver amps. Get rid of those annoying "snaps, crackles. When Jon Esau of www. All we need to do is determine the turns ratio of the transformer, and with that information we can calculate what impedance will be reflected back to the primary with a given load on the secondary. Blackstar Sock Monkey Accessories £22. 1big1 New member. 7 10 20 30 40 50 12000 11000 9000 10000 8000 7000 5000 6000 4000 2000 3000 1000 fig. KT88 Author: M-O Valve Subject: JA-FP-2000-10-01 Created Date: 10/1/2000 7:35:29 PM. I set the English R7 Bias pot to the chart for 6L6. If our valve is half a double triode ECC83, where Ca-g is 1. Standard Shiva - EL34 models are 80 watts and have a nice throaty growl with aggressive English-style midrange to punch thru the mix. Before insert KT88 check the bias voltage on grid setting the trimmer for the max negative voltage. So that’s quite a big difference. The calculator will give you the bias current for each tube. Kavin's stash). I had my Deliverance for a couple of weeks before a tube lost vacuum. A super value compared with TV-10 and TV-7. 6SC7 For Resistance CoupledAmplifier Chart, see 6SL7-GT,below Page 1 Page 2. The pots date to 1967(model was only made 1966 to early 1968) This was one of the first Sunn models to utilize KT88/6550 power tubes which began Sunn's staple in the later 1960s and early 1970s. Fisher, Stromberg-Carlson and Bogen console amps- selenium rectifier replacement, full recap and bad carbon comp resistors. #3 additional gain, mostly for the lead channel. In addition to the data I have scanned and posted, if you're looking for data on a particular tube you should visit TSDL on Duncanamps website, or Frank's tube data. A preset on Fractal Audio's amp modelers can have one or two Amp blocks, depending on the product. Turn on your power amp and let the tubes get warm (3-5 minutes) read the bias measurement. The wide range of sounds is limited only by your imagination. Take 20 times 70 percent which equals 14. 5% total harmonic distortion. You'll need a 1-ohm resistor for each power tube in the amp. Elekit TU-H82 Hybrid Tube Amp Kit. Elekit TU-8200DX Stereo Tube Amplifier Kit. I prefer their sound (bias unchanged). CA-4 and newer testers. A cross refe. One of the last articles to appear in Hi Fi News on amplifier construction was a brief review of a kit in the February 2003 issue, but that was a rarity. supply was easily able to supply 150mA+ into a KT88 under test. Solid state rectifier bridges. Push-Pull Fixed Bias. page 5 Installation and outline. So R is 200 ohms. We'll call this variable x. Sencore TC142 Tube Valve Tester Guitar Bass Amp Radio 6L6 KT88 12AX7 | eBay. February 5, 2015. It is worth stressing that the KT88 and ECC83 tubes come from a reputable manufacturer, Electro-Harmonix. (KT88, KT120, and KT150 pentodes can also be used, to respectively provide 40Wpc, 44Wpc, and 48Wpc). 550 VDC bias point (for each output tube) for the ST-120 is a nice compromise for good sound and good tube life. 朝日医療学園は、医療人を育む総合教育機関として進化します。 2016年4月、朝日医療学園の朝日医療専門学校岡山校、朝日リハビリテーション専門学校、朝日高等歯科衛生専門学校は統合し、『朝日医療大学校』へと生まれ変わりました。. class players from all genres of music. accommodate them. Only the highest quality and most consistent vacuum tubes earn the MESA Engineering® seal of approval. Bias is not critical IMO, if it sounds great, bias is smart, but I never bothered, may or may not bias my Cayin. a KT88 or 6550 operated fixed bias is in the range of 100K-220K. the-Wall Speaker Enclosures Unlike treble and mid-range tones, which are directional, bass tores are non~directional and ordinarily travel along two routes on the way to your ears- resulting in partial cancellation. The beam tetrode design of the 6L6 allowed RCA to circumvent Philips' pentode patent. With a gold-plated molybdenum alloy grid and carbon -coated screen grid, the Svetlana KT88 is the finest power tube of its type be ing manufactured today. 6-3 600 600 600 35 40 175 1 50 220t 100t *'Mctal shell wafer octal. You have to bias 6550 or KT88 tubes a little higher than the 42-43 Ma that you mention above. It is still in use in audio applications, especially electric guitar. Power tubes like EL34's and KT88's are good for about 2500 hours or more. A "black silver" version is also available with silver knobs and black front plate. AmpliTube 4 is a guitar and bass tone studio for Mac/PC that works as a standalone application and as a plug-in for your favorite DAW. When Jon Esau of www. KT88 and grid leak/bias feed resistors. I put the ET 6l6 back and rebiased back to my Max 36ma I prob call them Monday to see what they say. 65 Super Reverb Amplifier. Heather Grey (Slanted Pocket)): Shop top fashion brands Pants at FREE DELIVERY and Returns possible on eligible purchases,Buy ProGo Men's Casual Jogger Sweatpants Basic Fleece Marled Jogger Pant Elastic Waist (Medium,Best value for high quality,Wholesale Price,Same day shipping,Sell & More Promotion Services,Visit us for a unique experience!. Testing has been carried out with these tubes so far, 6L6, 6V6, 6F6, EL84 and a EL34. The Matcher II is a compact precision measurement station for the test bench or sales counter. You'll need a 1-ohm resistor for each power tube in the amp. 52) Posted by Jim McShane on 2004-04-13, 14:55:50 (68. For sale is a 1966 Fender Mustang in Daphne Blue with the original case. Always bias your amplifier by strictly following your amp manufacturer's instructions. Also the most common electrical circuits are given for KT88 and 6550. Though simplicity was part of the design goal for this amplifier, this is not a beginner’s build. now the ones I installed are the electo-harmonix ones got a great deal,and would. All of the tubes listed above have their cathodes on pin EIGHT, which will be grounded to the chassis. Close or identical. First, I listened to the initial three discs in my review pile. Sold from 1999-. Message User. 2A3 is super good tone and power is enough for 91dB/m Speaker System. Of course, now the driver tubes have to drive 50k instead of 100k. Esoteric A-100 Modello celebrativo 25 anni Finale di potenza stereo a valvole in push-pull. Matched Quartet of KT88 Power Tubes $229. Have you ever wonder what the difference is between each of the 6l6 tubes, have a quick look at this chart to help you see what the differences are as it just might help you choose. The fixed-bias, push-pull, class-AB Luxman uses two KT88 pentode tubes per channel, operated as triodes, producing 25Wpc; ECC802 and ECC803 dual-triode tubes supply input gain and phase inversion. It provides good body and nice high end definition. Power tubes: 6V6, 6K6, EL84, EL844, 6L6, 5881, EL34, KT66, KT77, KT88, KT120, 6550, 300B. This calculator is for a single tube. -I bias all my amps hot, I've been abusing the hell out of the GL KT88's for over 5 years, -a bias of 73 shouldn't of cooked anything, sounds like bad tubes and Marshall covering there ass and taking no responsibility. 3 HS-5348-1 Bias 1. Genalex / Gold Lion KT88 Is now the No. Most of them show these audio beauties used in the push-pull configuration in order to obtain the greatest efficiency and the most power output. Allow another ~~35V for drop in OT primary, we need 420V at OT B+ feed. 99 5% off 5% off previous price $19. We see some cloned tube (KT88) Some tubes have elements (see periodic charts) added inside , called Calcium oxide, CAO or Barium oxide Bias, and Plate supplies (yes a small horror then) The below radios use 75mA of filament current alone, 10 times what the transistor radio needs to operate. The label which says to adjust bias to -51 VDC for 6550 tubes. The chart below compares the distortion ratio at 50Hz of two mic preamps: a Dbx 386 and an AEA TRP. That bias point is up the chart because of the lower plate voltage driving the dissipation compared to your amp. Trim-pots for KT88 Bias adjustments. Line Magnetic LM-502CA DAC. Preferred Series 7025 and Sovtek 12AX7LPSs or EHs are suitable. The label which says to adjust bias to -51 VDC for 6550 tubes. In fixed bias circuits, the cathode is frequently at ground potential and the grid is negative. Finding the right amp for your bedroom and smaller clubs, can be a challenge. Always bias your amplifier by strictly following your amp manufacturer's instructions. It is generally associated with higher brain functions such as conscious thought, and sensory processing. My recommended bias measurement method is the "Output Transformer Resistance Method. The pin out is the same. Great Prices! I have two single tubes left in stock for $89. Sounded great, after a while I chose and swapped in some KT88’s. 6SL7-GT (same basic data applies to6188, 6SL7-WGT, also, except for filament voltage, 12SL7-GT) ForResistance Coupled Amplifier Chart, click here Page1, Page2, Page3. KT88's or 6550 tubes will last longer in an ST-70 than EL34 tubes. 2 x 845 PSVANE ACME. Joined: Jun 20, 2016. Other tubes from the 6550/KT88 family will work, but the best overall sound can only be obtained from the KT120. All MESA® tubes offer unsurpassed consistency and reliability for ANY tube amplifier, and certainly MESA amplifiers!. The -20 DC voltage in the middle there is for the bias on the grids of the 6V6's. I had my Deliverance for a couple of weeks before a tube lost vacuum. Any Penthodo grid bias are less than Triodo's bias so please try to use any kind of driver. This calculator uses the power equation. Use this tool at your own Risk. intothearena66 likes this. 19 2 bias supply caps 100uF, 100V 647-TVX2A101MCA 1. It has even less distortion and an even cleaner tone then the 6L6 or even the 6550. For enthusiasts, hobbyists, and casual listeners. 10-09-2015 10:18pm. The purpose of this KT88 / KT66 /6550 / KT90 / KT120 page is to give an overview about what KT66, KT88. Planned tube types include. Power cord is replaced with a grounded 3-prong. All the vacuum tubes are covered by a 12-gauge stainless steel wire cage with a black powder coated finish. 50 volts over a 10 ohm resistor on each tube. The wide range of sounds is limited only by your imagination. (As shown on the picture). The fully regulated version outputs 65 watts/ch from about 26. This has nothing to do with personal taste just what will works and what dose not. class – A – all power tubes patent full auto biasing ( pre selectable ) CHALLENGER 115 / 145 Watt using 6 x El34, 180 Wat using 6550 ( China brown socket – recommend ) – no use “JJ” brand. 3 x12ax7 4 kt88 mute on unless spkr in bright active hand built in petaluma, california u. The KT88-TK is a beam-power tetrode that shares similar applications as the 61. 5 out of 5 stars 38 $16. 5% total harmonic distortion. My Marshalls are all biased a little differently. The OP's amp can accommodate either an El34 or Kt88 tubes and these aforementioned bias setting are also quoted in the OP. Don't know what the Rk would be (140-150R, maybe) to create that bias voltage and current. KT88 and grid leak/bias feed resistors. Power cord is replaced with a grounded 3-prong. Distributed by parts distributor Magic Parts, the Maxi-Matcher is a handy, comprehensive tube tester that allows for precise matching of output tubes in terms of bias and transconductance. Supplied complete with all parts, wire, solder, and easy -to- follow instructions. The $450 Maxi-Matcher contains four tube sockets and can test output tubes, such as the popular 6L6, and 5881, 6V6, 6550, EL34, KT88, EL84 and 7027s. America's Largest FREE Audio/Hifi and Home Theater classifieds site. Each tube will have a different effect on the sound. Tung-Sol 6550 New Production Power Vacuum Tube. It provides good body and nice high end definition. Non-Adjustable Fixed Bias: This category can be the most labour intensive when it comes to setting the correct bias. New or used. Unlike the Icon Audio and Ming Da, which display their valves proudly and the Peachtree hybrid, which displays its valves through a sealed window, the Jolida hybrid looks like a basic solid state amp and is ideal if that is the form factor that you want in your system. If fuse blowing continues, these possibili-ties should be checked. It adds ultra-fast Hexfreds to the power supply as well as other custom Jolida parts. I decided to build a tube amp for the fun. 1 choice for the audio Connoisseur searching for that ultimate tone. In many cases you don’t have to remove the Chassis out of the cabinet!. The OP thought that was 51 ma and it's not. Tom Schlangen - ETF 06 Pentodes connected as Triodes 4 All additional grids serve a certain purpose and function - they were added to a basic triode system to improve the system behaviour in. Tube and Bias Info. 2pc Tube amp bias tester for el34 6v6 6l6 kt88 6550 5881 7024 "mV"test mode. Plate Voltage mA: Calculate Plate Dissipation Based On Plate Voltage And Cathode Current Readings. 6SJ7 For Resistance CoupledAmplifier Chart, click here Page 1 Page 2 Page 3 Page 4 Page 5 Page 6. It's hard to read the labels in the manual, but it looks KT88-STR to me. page 5 Installation and outline. It seems odd to me that I would have gone from a higher output tube (KT88) to a lower output tube (EL34) and the bias went from. SEARS NOVEMBER26, 2000 1. Division St. We agreed that I'd throw a few of my own tubes, including the Tung-Sol EL34B and. This is required in all "fixed bias" amps when new power tubes are introduced. The only KT88 settings that I've been able find is on the 666-05 chart, but the pin settings are incorrect and the grid & plate settings appear way off. 新潟県へ旅行するなら、旅館・ホテル予約は日本旅行がおすすめ!複数のお宿を比較できるから、あなたにピッタリのお宿が見つかります。日本旅行のサイトでは、オンラインで人気の温泉や国内旅行の宿泊先や人気プランを検索・予約できます。日本旅行でお得な国内ツアーを見つけて. Universal loadline calculator for vacuum tubes. A KT88 production line of a large factory is always automated. Turn the volume control all the way down (full counter clockwise) while performing bias adjustments. Patrick Turner says that running a tube at %66 of its max anode wattage is optimal for PP amps in terms of both tube life and sound. New! Published this week! From TV front to the 5E and 5F Series narrow panels, from system design concepts to individual stage operation, an all-new examination of Bassman electronics. The KT88 fits a standard eight-pin octal socket and has similar pinout and applications as the 6L6 and EL34. OPT5 for SE 1. A cross refe. Joes Jeans Womens Icon Midrise Skinny Ankle Black Distressed Jean,Icon Midrise Skinny Ankle Black Distressed Jean Joes Jeans Womens, 23: Shop top fashion brands Jeans at FREE DELIVERY and Returns possible on eligible purchases,Buy Joe's Jeans Women's ICON Midrise Skinny Ankle Jean, DITA,find your best offer here,shop for things you love,Free Delivery & 365 Days Returns Policy. 0 Acknowledgments. The author cames no responsibility for any information provided. It is not fixed bias, either. The wide range of sounds is limited only by your imagination. This holy grail of vintage combos has been used by Neil Young, Mike Campbell, Rich Robinson, Mark Knopfler, Billy Gibbons, and countless others. 6SJ7 For Resistance CoupledAmplifier Chart, click here Page 1 Page 2 Page 3 Page 4 Page 5 Page 6. 7 10 20 30 40 50 12000 11000 9000 10000 8000 7000 5000 6000 4000 2000 3000 1000 fig. 99 previous price $19. Kt88's usually have 100k bias resistors for a pair. In German: Single Ended: 48. ProductId : 27005690. SIDE PANELS: Bias pushbuttons (left and right sides). Before insert KT88 check the bias voltage on grid setting the trimmer for the max negative voltage. About 50 ma is right when in an ST-70 which is. It's the model with the sockets for 7, 9 and 10 pin miniatures, 5,6, and 7 pin subminatures,octals, loctals, and Compactrons. In this article, the 6550 is used in a clean, sweet-sounding, single-ended design. Many other DIY amplifier designs were published in the 1980s, and some during the 1990s. With multiple tubes sharing the same cathode resistor, this calculator assumes the tubes are fairly well matched. EL34 Substitutes. Pure valve warmth and clarity that separates tonal frequencies from lows to highs and pronounced mid frequency, is why the KT88 Gold Lion is a winner with Hi-Fi and. for instance: My Cayin Amp. It sounded much better than the old tubes. a KT88 or 6550 operated fixed bias is in the range of 100K-220K. Solving for I we get. The beam tetrode design of the 6L6 allowed RCA to circumvent Philips' pentode patent. Universal loadline calculator for vacuum tubes. The triode configuration employed achieves longer vacuum tube life and a highly transparent timbre that vacuum tube amps are known for. Handy chart of average bias current settings for most tubes on the front of the unit. I decided to build a tube amp for the fun. TUBES To create a push pull amplifier is possible to use triode and pentode but obviously to test many configurations like the ultra linear we need a pentode. The Prodigy features a “multi-watt” feature implemented as a Full/Half power switch that allows the user to select a desired power range. Single Ended 2 x 8 Watt Class "A" (KT88) Uses push-pull 6SN7, then KT88. Many articles have appeared regarding projects using one of the most sturdy, versatile, and trustworthy audio tubes ever made — the 6550. The chart they supply says the 6s are 25 watts and every place else says it's 30 watts. By using this website, you agree to our use of cookies. #3 additional gain, mostly for the lead channel. Housed in a compact, handsome and rugged black case. Please indicate your preference of a gold or black front panel. 05 (amps) X R (ohms). The 0 to 300V (x axis) scale, the 0 to 300mA (y axis) and the bias voltage legend to the right of the chart are generated automatically by Open Office or Excel. I am looking to buy some of the more common model vintage Vacuum tubes for Hi-Fi audio equipment. At this time you can adjust the current level (using the amplifiers bias adjustment control) to the appropriate level. 6V DC filaments heater supply. Tube and Bias Info. I think originally the manufacturers employed 807's. In fact I think of that stuff since a really long time now (since the first amp, I 've built ten years ago). Many articles have appeared regarding projects using one of the most sturdy, versatile, and trustworthy audio tubes ever made — the 6550. 5881 Nobsound Vacuum Tube Amp Amplifier Plate Bias Current Probe Tester 8 Pin Socket for EL34 6550 6L6 KT88 CT1-C, Cathode Current. The EH KT88 can deliver more power, but the sound is different from the KT77. (As shown on the picture). They're all interchangeable within limits. Probes for EL84, 6BQ5, 7189A can be ordered separately (BMA2-EL84). 2 x EL34 PSVANE EL34PH. Tube type: ----Choose---- 6V6 EL84/6BQ5 5881 EL34 KT66 6L6GC KT88/6550. Recommend a low-noise type with a coiled heater, such as NOS 7025s or ECC83s. thetubestore. The Cerebrum or cortex is the forward-most portion and largest part of the human brain. This webpage offers two ways to calculate tube bias and plate dissipation. The Prodigy does not have the Lo setting of the Strategy, but it’s really not needed on this amp. accommodate them. analogmetric. A quick-and-dirty way to add a bias adjustment to a DR504 or DR103. This calculator is for a single tube. T1 can Get the reading direct from the current meter, It does not need any convert from mV to mA. A bad tube will sound loud no matter what channel it’s on. In audio amps, JJ 6550 performs similar to JJ KT88, with excellent three dimensional soundstage that JJ KT88 is known for. The good news is, once your amp is biased for a particular Distortion Rating you won't need to get it re-biased if you re-fit the same number valves next time round. 40 and the amp made my HF section a lot louder. This calculator uses the power equation. No the kt-120s are a better stable tube then the kt-88 to bias in the cad-120 I have noticed. Any of the standard octal-base power pentodes common in today’s audio amplifiers. Each tube will have a different effect on the sound. So, it was designed to run at about %80 of its max in the MK3. My Marshalls are all biased a little differently. The circuit is wired for class B, zero bias. The tube lineup is: 6L6, 6L6, 12AX7, 12AX7, 6AV6, 5U4. Single-Ended: 23. The KT88 tubes sound better, but they are quite expensive, the EH EL34 is one-third the price and it sounds good too! My favorite selction of tubes for this amp are an Amperex Bugle Boy 6DJ8 (in place of the 6N1P) and Siemens EL34 on triode mode. 6l6gc, 5881, el34, 6550b, kt88 Notes: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. My contribution: a collection of triode solvers for DC bias. 5% total harmonic distortion. That journey above is certainly true for me not necessarilly owned a Leak Tube amp but hearing and owning similar items like Dynaco 70 Tube amps and Chinese made KT88 Tube amps plus others. I prefer their sound (bias unchanged). If fuse blowing continues, these possibili-ties should be checked. 65 Deluxe Reverb Amplifier. In fact, I'm minded to use 807's myself. If our valve is half a double triode ECC83, where Ca-g is 1. for instance: My Cayin Amp. Power cord is replaced with a grounded 3-prong. ! After changing tubes always turn all the bias trimmers’ counterclockwise (cold bias) with bias screwdriver, before turning on the amplifier. A well organized and easy-to-understand approach to guitar amplifier repair covering basic electronics, reading schematics, understanding tubes and transformers, tube biasing and use of test equipment. The 0 to 300V (x axis) scale, the 0 to 300mA (y axis) and the bias voltage legend to the right of the chart are generated automatically by Open Office or Excel. They're all interchangeable within limits. Is a bias setting all I need to go from 6l6 to el34 to kt88. In many cases you don't have to remove the Chassis out of the cabinet!. 10-09-2015 10:18pm. Following Ohm's Law, 10 (volts) = 0. Title: 6L6GC Author: RCA Subject: FP-2012-01-07 Created Date: 1/8/2012 12:17:39 AM. Message User. Heather Grey (Slanted Pocket)): Shop top fashion brands Pants at FREE DELIVERY and Returns possible on eligible purchases,Buy ProGo Men's Casual Jogger Sweatpants Basic Fleece Marled Jogger Pant Elastic Waist (Medium,Best value for high quality,Wholesale Price,Same day shipping,Sell & More Promotion Services,Visit us for a unique experience!. The tube lineup is: 6L6, 6L6, 12AX7, 12AX7, 6AV6, 5U4. 2pc Tube amp bias tester for el34 6v6 6l6 kt88 6550 5881 7024 "mV"test mode. Get rid of those annoying "snaps, crackles. Pre-amp tubes: 12AT7, 12AU7, 6SL7, 6SN7, 6922. In this article, we are going to take a look at two power tubes that are similar enough to be interchangeable, but have different internal designs: the EL34 and the KT77. The Alessandro Bias and Matching Meter 6K6, 5881, EL34 / 6CA7, 7581, 7591, 7027, 6550, KT66, KT77, KT88 or any octal tube with the plate on pin 3. Price: £1,050. It was quite an interesting experience. A Holes on the Tube Top labeled “A” are LED indicators for the bias of the power tubes situated nearest. Turn on your power amp and let the tubes get warm (3-5 minutes) read the bias measurement. 6550 Tube Selection Guide. In fixed bias circuits, the cathode is frequently at ground potential and the grid is negative. 4 * P4 * C * 6250 I might as well give the KT-66 while I'm here: 6. You can find kits in the online store! In case you have heard horror stories about the metal bases being connected to a pin and causing shorts, the culprits are the sovtek KT88 and KT66 tubes. In these calculations, 5% of the cathode current is assumed to be screen current. この三つを備えた人だと伝えていますが、では、新卒者や未経験者の方に今すぐ技術力を求めるかというとノー。. In German: Single Ended: 48. 2mA is what I would have liked to see (1. All elements with charts (e. The $450 Maxi-Matcher contains four tube sockets and can test output tubes, such as the popular 6L6, and 5881, 6V6, 6550, EL34, KT88, EL84 and 7027s. KT88 Load line, online calculator One up grade, is this from the maker, the charts are available even for the 532. The KT88 audio tube is considered to be one of the best sounding power tubes for hifi tube audio amplifiers. The fully regulated version outputs 65 watts/ch from about 26. My '77 JMP 2203 is biased to 40mA per tube. EXCITING NEW SPEAKER SYSTEM ACHIEVEMENT ••• For Superior, In-Phase Bass Response from Along. It seems odd to me that I would have gone from a higher output tube (KT88) to a lower output tube (EL34) and the bias went from. Tung-Sol 6550 New Production Power Vacuum Tube. Elekit TU-8200 Optional DAC Module PS-3249. This will enable you to figure out the year your amp was made. 99 5% off 5% off previous price $19. What the manufacturer says: "With the new KT150, Tung-Sol continues to lead in the audio power tube, power game. The purpose of this KT88 / KT66 /6550 / KT90 / KT120 page is to give an overview about what KT66, KT88. Re-biasing of output tubes. Compare to most of others EL84s I should to boost the bias much hotter. IR g —k (cathode bias) Rg—k (fixed bias) *Triode connection Base Bulb Max. com offered a set of five EL34-type tubes for review (JJ KT77; JJ EL34 II; Svetlana EL34; Genalex Gold Lion KT77 and Mullard EL34) I jumped at the opportunity. Blackstar Tone:Link Accessories £19. The tubes included with the Inspire KT-88SE Fire-Bottle: a pair of brand new Genalex KT-88 output tubes , a NOS 6SN7 input tube along with a NOS 5U4G rectifier tube. Handy chart. Then go back to 300B-chart sheet and input the tube ID there. SND Tube Sales. Bias is set. Less expensive than other bias meters, and the ONLY one on the market with TWIN meters in one case. 新卒者、未経験者の方へ。. Recently we had an original owner pair of Dynaco Mark III amplifiers brought to us for restoration and modification. Warning: Substitutes are given as a guide only - please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. I set them though around 140 MA, and I got them for $450 USD all in at upscale. seen as dial above % I turn on the tube tester now. 朝日医療学園は、医療人を育む総合教育機関として進化します。 2016年4月、朝日医療学園の朝日医療専門学校岡山校、朝日リハビリテーション専門学校、朝日高等歯科衛生専門学校は統合し、『朝日医療大学校』へと生まれ変わりました。. You'll need a 1-ohm resistor for each power tube in the amp. Eurotubes Pro One Bias Probe for Octal Base Power Tubes. No reviews. Power cord is replaced with a grounded 3-prong. The Cerebrum or cortex is the forward-most portion and largest part of the human brain. Re-biasing of output tubes. But in a Marshall amp, you can't do that because the voltage is rarely over 500. My contribution: a collection of triode solvers for DC bias. In fact, I'm minded to use 807's myself. but some bias adj. Real easy to use even if you've never used a tester before, set 4 dials from the settings in the chart book & press a switch. 0: 6SN7 (2), KT88 (2) 230: Audio Amplifier with transistor [In Dutch] Schematic Only. Universal loadline calculator for vacuum tubes. They use a fixed resistor soldered into the. Elekit TU-8200R DX 6L6GC Integrated Amplifier/HPA Kit with Lundahl Transformers. 40 set 4 dials from the settings in the chart book & press a switch. Other than being rough on the tubes, what other problems. When Jon Esau of www. If you haven't owned any tube before, we recommend you not to start with a 845 /805/211 tube amps until you get comfortable with maintaining a lower voltage tube amp such as EL34 / KT88 or 300B amps. Blackstar Sock Monkey Accessories £22. CAPACITANCES 1-2 CHARACTERISTICS Cin 16 1)17 a. Allow another ~~35V for drop in OT primary, we need 420V at OT B+ feed. 8 - Cathode & Beam-Forming Plates. Bias current is the amount of electrons flowing from the cathode to the plate with no audio signal on the control grid (idle current). 31 1 speaker load 680Ω, 2W 282-680-RC 0. My contribution: a collection of triode solvers for DC bias. In general, the KT88 tube has a magical mid-range similar to the smaller EL34 tube , but with low and high end extremes that reach much further. - Maybe I should divide this "chart-calculator settings" by 2? But why?. It breaks up faster than the EL34, 6L6, and 6V6, and has the least amount of headroom of the four. 3 15 6 30 2 250 250 14 100 000 75 4. Debuting in 1969, the 400 PS was a behemoth conservatively rated at 435 watts RMS. I am working on posting the RCA HB-3 Tube Handbook on line on this. There is a Red selection button on the Back of the amp to switch. a KT88 or 6550 operated fixed bias is in the range of 100K-220K. In these calculations, 5% of the cathode current is assumed to be screen current. 6V DC filaments heater supply. BIAS ADJUSTMENTS:. The paralleled first stage feeds a driver stage featuring. A cultural bias formed during those years among U. Product information "E34L-Cz TAD PREMIUM Matched". Harp, or bass with a few mods OR use it for a PA or home audio amp. The KT88 fits a standard eight-pin octal socket and has similar pinout and applications as the 6L6 and EL34. With a cold bias the sound is sterile and dull. The KT88 / KT66 /6550 Directory. 99 (1) Beige/Brown, Gold Stripe Grill Cloth, 59" Wide. Cathode Bias/automatic bias allows for easy tube changes without adjustment. Enter plate voltage: Select output tube: EL84: 6v6: 6L6: 7027: KT66/EL34: 6L6GC: kt77: KT88: 6550: KT120: This information is for reference only. Adjustable Fixed Bias: Amps that fall into this category include an internal or external potentiometer/knob that with some basic knowledge, can be adjusted with ease to set the bias. I doubt that any tech will bias a KT88 or 6550 amp hotter than that without a good reason, what ever that reason may be. The circuit is wired for class B, zero bias. Recently we had an original owner pair of Dynaco Mark III amplifiers brought to us for restoration and modification. Unfortunately, your dealer in Thailand is incorrect in his assertion that the amplifier is autobias. A digital voltmeter and small screwdriver are required for bias adjustment. The Matcher II is a compact precision measurement station for the test bench or sales counter. The good news is, once your amp is biased for a particular Distortion Rating you won't need to get it re-biased if you re-fit the same number valves next time round. If you own an EL34 amp, you know the magic it produces. JOLIDA JD1501BRC. One of the last articles to appear in Hi Fi News on amplifier construction was a brief review of a kit in the February 2003 issue, but that was a rarity. Salt Lake City, Utah, 841**, UNITED STATES OF AMERICA. P is the power rating of the power tube, I is the bias current, and V is the plate voltage of the power tube. Also provides 10 troubleshooting flowcharts, voltage charts for typical amplifiers, and many modifications that you can do yourself. 6L6GC Comparison of Current Made Tubes. The Bruiser is a heavy duty stereo tube amp designed to handle these types of speakers. E34L, E34LS. My contribution: a collection of triode solvers for DC bias. In fixed bias circuits, the cathode is frequently at ground potential and the grid is negative. 4 volts press P4. Pre passivo per 3 ingressi gestibili da telecomando in. Back in the day, Ampeg brought into the world the heavy weight champion of bass amps, the legendary SVT. Mikey Demus of Skindred…. If you want 3 ma, and the tube's transconductance chart shows. Grid Resistor (self bias) Cathode to Heater Voltage Cathode to Heater Resistance 1. The first of this family of tubes to be introduced was the 6V6G by Ken-Rad Tube & Lamp Corporation in late 1936, with the availability by December of both Ken-Rad and Raytheon 6V6G tubes announced. Specifically designed for audio amplification, the KT88 has similar ratings to the American 6550 which was designed for use as a servo amplifier. It also has a set of balanced inputs as well as RCA ins. The author cames no responsibility for any information provided. The -20 DC voltage in the middle there is for the bias on the grids of the 6V6's. They are usually used for relatively small amplifiers, e. Each tube in this comparison was installed in the same custom-built, fixed-bias single-ended guitar amplifier in order to obtain the voltage gain measurements and conduct listening tests. These tubes do signature EL34 sound very well. Noise reduction. The story begins in the 1950s with the invention of the EL34 vacuum tube by the Mullard company in England. Use this as a guide for setting your bias. 2021 Billboard Music Awards Winners List. Title: 6L6GC Author: RCA Subject: FP-2012-01-07 Created Date: 1/8/2012 12:17:39 AM. If fuse blowing continues, these possibili-ties should be checked. Electro Harmonix KT90 Power Vacuum Tube. AND has several Western Electric tubes types right on the chart! 300A/B, 101L, 102L, 396A, and 417A! Will also test most common audio tubes like 6CA7, 6L6, 6SN7, KT88, 7247, 12AX, AU, AT, 7247, 7199,7355, 7591 and 7868 (with adapter). Please see the substitutes at the top of the page for more details. 63 Reverb Amplifier. ca: Musical Instruments, Stage & Studio. 99 previous price $19. 6SC7 For Resistance CoupledAmplifier Chart, see 6SL7-GT,below Page 1 Page 2. Recommend a low-noise type with a coiled heater, such as NOS 7025s or ECC83s. 自家用車を本施設にお停めいただく際は、「赤磐市穂崎駐車場利用証」の表面を上にして車外からよく確認できる場所に掲示して下さい。. Plate Voltage mA: Calculate Plate Dissipation Based On Plate Voltage And Cathode Current Readings. ca: Musical Instruments, Stage & Studio. Move the switch from "A" to "B". Adjusting to 350V 3K 117mA puts Pdiss at 41W, OK for KT88. kt66 has different tone and about the same output as 6l6 about 50watts a pair. The beam tetrode design of the 6L6 allowed RCA to circumvent Philips' pentode patent. Have you ever wonder what the difference is between each of the 6l6 tubes, have a quick look at this chart to help you see what the differences are as it just might help you choose. Distributed by parts distributor Magic Parts, the Maxi-Matcher is a handy, comprehensive tube tester that allows for precise matching of output tubes in terms of bias and transconductance. The Prodigy features a “multi-watt” feature implemented as a Full/Half power switch that allows the user to select a desired power range. The KT88 also can handle larger plate voltages, up to 800 volts. 7 ma U g1 = -15 V S = 11,5 ma/V R i = 12 kΩ µ-g1-g2 = 8 Triode Connected U a, g2 = 250 V I a+g2 = 147 ma U g1 = -15 V S = 12 ma/V R i = 670 Ω µ = 8 Red/Blue versions available max 125,0 max 52,0 max 110,0. 99 previous price $19. 5% total harmonic distortion. Esoteric A-100 Modello celebrativo 25 anni Finale di potenza stereo a valvole in push-pull. The Minotaur uses the well-regarded MJL3281 and MJL1302 transistor devices at the output in a modified Sziklai configuration for superior linearity. We burn-in, test and match all tubes. Bias is an alternating current of high frequency which is applied to the tape recorder to reduce distortion. But, the biggest improvement and surprise was when I invested the 2 6sl7 with Sylvania vt-229/6sl7gt ($100 ea. Use a small screwdriver and adjust the bias control (located on the rear of the amplifier, “Tube ias Adjustment”) for 100 mA after the unit has warmed-up for 20 minutes. Bias Procedure for Blackstar The following will show the bias test points, correct bias voltage(s), and bias balance procedure for the HT and Series One lines of Blackstar Amplifiers. NOT EVEN CLOSE. The original Bassman from 1952 had a single 15” speaker and was tube-rectified, yielding 26 watts from a pair of 5881 power tubes. 19 2 bias supply caps 100uF, 100V 647-TVX2A101MCA 1. 6SJ7 For Resistance CoupledAmplifier Chart, click here Page 1 Page 2 Page 3 Page 4 Page 5 Page 6. Standard Shiva - EL34 models are 80 watts and have a nice throaty growl with aggressive English-style midrange to punch thru the mix. and became quick competition for the USA made 6550 tube. The 0 to 300V (x axis) scale, the 0 to 300mA (y axis) and the bias voltage legend to the right of the chart are generated automatically by Open Office or Excel. Bias Amp 2 is software that's available in 3 grades. This is a true single ended class A amplifier, using a 5Y3 rectifier and a single 5691 pre-amp tube. (Order nr: 380-080-67) Final inspection in tube factories is really a weakness. It is still in use in audio applications, especially electric guitar. This is truly the Tyrannosaurus Rex of beam tetrodes. DC voltage measured between plate and cathode. KT120 TUNG-SOL. Second: for KT88 tubes, the output is limited to the voltage of the power supply. The label which says to adjust bias to -51 VDC for 6550 tubes. One step above is to take the 8 triodes (16 elements) and add the plate current. It is identical to the 200s but was supposed to be paired with a different cab. More Single-Ended KT88 and 6550 Tube Amplifiers. Metric winding wire size chart for grade 2 polyester-imide wire. My 6CA7 data sheet SE example shows 25W of plate dissipation @ 14v of bias. FREE Returns. The power amp design is a key component of the sound of a real amp, and the Power Amp section in Bias Amp 2 once again provides a wide range of customization options. Original NOS tubes, Mullard, RCA, Bugel Boy, etc Non-original soft case / cover included. Power tubes: 6V6, 6K6, EL84, EL844, 6L6, 5881, EL34, KT66, KT77, KT88, KT120, 6550, 300B. The $450 Maxi-Matcher contains four tube sockets and can test output tubes, such as the popular 6L6, and 5881, 6V6, 6550, EL34, KT88, EL84 and 7027s. The KT88 audio tube is considered to be one of the best sounding power tubes for hifi tube audio amplifiers. Typical bottles - JJ-6V6S, 5881/6L6WGB, 6L6GC, EL34, KT66, KT88, etc (watch out for pin1 on true pentodes). Solid state rectifier bridges. Power tubes like EL34's and KT88's are good for about 2500 hours or more. 65 Super Reverb Amplifier. Regards Sam Aug 19, 2009 #10. Marshall opted for a built-in digital reverb rather than a traditional reverb tank, and the amp features. The average gain was 88. This is required in all "fixed bias" amps when new power tubes are introduced. Kavin's stash). Z Amplification is proud to release its most powerful Guitar amp to date, the Delta 88. The ProLogue & DiaLogue One, Four, and Six amplifiers can use 6550 and KT88 tube types without any issues. B Holes labeled “B” are the location of the bias controls. Bias is set. T1 can Get the reading direct from the current meter, It does not need any convert from mV to mA. How you operate the tubes (push-pull, push-pull parallel, ultra-linear, class, B+, bias, operating points, etc. The power supply, feedback, biasing arrangement, type. The beam tetrode design of the 6L6 allowed RCA to circumvent Philips' pentode patent. Given below is the tube amp bias calculator to find the bias in ampere or milliampere (mA or A).