6550 Tube Data


I would like to enhance this list with additional tube settings, including the ones in the official supplement pages not shown here. are common guitar amplifier power tubes, and are all easily biased with this method. The idea of building a DIY audio vacuum tube amplifier based on high-quality materials begins in the early 90's. This is good news for your intended tube swaps as both the KT77 and the 6550 have the same heater current as the EL34. There is a key between pins 1 and 8 to ensure that the tube can only be plugged in one way. 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. and first introduced in 1954. The 5881 Valve/Tube. pdf (87270 bytes) 8/52HM Ferranti CRR 8-52HM. DIY Audio Home "807" Push-Pull amp (5B/254M tubes driven by the Push-Pull driver board) (Click on the photos for full-size images) This is a pair of monoblock amplifiers that I built using the Push-Pull driver boards (described in more detail here). If I'm not mistaken, I read that the D201A's had the 6DG6 tube final and the D201's had the 6l6 tube. Push Pull 6550 DIY audio tube amps. Shuguang electronic tube kt88-98 generation golden lion noble sound EH quanzhen JJ EL34 6550 the current data or even making new tubes. hp = Heptode Unit. So in a Marshall Major the tube is already being pushed past its limits. ) The 6L6, 7581A, 6V6, 6550, EL34, 5881, KT66, KT88, KT90, KT100, etc. Copy of the original type 3 Tung-Sol 6550 made in the 1960's. Abstract: KT88 GEC 6550 KT88 6550 Tube tubes kt88 CV5220 GEC KT88 valve 6550 kt88 data Tube 6550 Text: is similar to the 6550. Plate load resistor 47 k ohms, following stage grid resistor 100 k ohms, cathode resistor 1000 ohms and gain 13. This entire Select series of tubes are ONLY sold through our website and not through any other vendors in order not to have mixed with unknown quality tubes. Tung Sol 6550 reissue: warm sounding, nice highs, not too expensive JJ KT88: good sounding, reliable. The EM800 indicator tubes are also installed and their circuits connected to the amplifier. 7027 tubes are rare and expensive, however, for under $3. M-6550-3V 4. The TELEFUNKEN 6550-TK is a high output power tube suitable for use in guitar amplifiers and Leslie speaker systems. I have to output tube famous 5998A as indirect heater triodes. Because of our tradition of supplying the highest quality tubes, we are proud that our ouput is the very best in the world for upgrade and replacement. Parallel Push-Pull 300B Mono Amplifiers Rudolf Moers from the Netherlands has kindly sent us details of his parallel push-pull 300B monoblock tube amplifiers to share with the DIY Audio community. When a government requirement for CV4017 tube specification came in a Request For Proposal (RFP) to the 4 major USA tube factories they all worked together to source from one another to fill the orders. Tonally, it's in the same vain as the 6L6: clean, little distortion and an almost 'glassy' feel. KT-88 Push-Pull Project with Hashimoto Transformers. Tungsol 6550 Power Amp Vaccum Tubes. The "premium" qualities of the 5692 include a long-life cathode rated at 10,000 hours along with extra support rods and mica spacers to eliminate microphonics. 0544 A or 54. pdf (87270 bytes) 8/52HM Ferranti CRR 8-52HM. pdf (89848 bytes) 8/04TM Ferranti CRM 8-04TM. BEAM PENTODE 270 310 350 390 430 470 510 Ug2(V) Ua(V) Ua(V) 0 100 200 300 0 0 100 200. The screen resistors are changed from 470 ohms. 6550 tube has been the output tube of choice in high power audio amplifiers in USA. 6550 k,g3 st- 16 bottom view basing diagram jedec 7ac pin 1 no connection or base shell glass bulb large wafer octal with barriers 7 pin low loss 87-99 the 6550 is a beam pentode power amplifier primarily designed for audio service. ) will change optimum plate load impedance. Electrical Heater: Min. To obtain galvanic isolation between the EM800 circuit and the amplifier I used a 1:30 current transformer on the output lead to the speakers. The current can be calculated by dividing by the plate voltage. pdf (238751 bytes) 6559 Sylvania TWT. 6550 application data. For those who like to roll tubes, a switch be used to readily allow adjusting the bias current. The ultimate in musical tone and smooth overdrive, the STR delivers the sound that established Tung-Sol as the benchmark of quality. Tube Data Sheet Locator. A tube manual or tube manufacturer's technical data sheets should be consulted first, before making a decision on a proper output transformer. Product Review - A Comparison of 6550 and KT-88 Power Tubes - June, 2002 Jason Serinus. 6350 Dual Triode (The best sounding 6350 are Sylvania black plates 1950's followed by GE black plates then RCA) (The 6350 is a very high quality dual-triode. This means it can handle a LOT of power. I fond that a KT120 tended to draw less Ia at idle if plugged into a tube socket which previously had 6550, so it would appear it is safe to plug in the KT120 to replace all other beam tetrodes, ( although please don't assume anything, and don't assume KT12 will be. * Specified measurement data. • 4 6550 tubes per channel with individual bias setting for each tube • Audiophile grade film and foil caps used in the signal path • Extruded aluminum front panel with luxurious, modern look – black and silver options available ST-150 Data Specifications Vacuum Tube Complement 8 x 6550, 2 x 12AT7, 2 x 12BH7 Output Power. It is one of the largest tubes in its class and can handle significantly higher plate voltages than similar tubes, up to 800 volts. Xxx jap tube products are most popular in Italy, Chile, and Canada. 6681 4 Tubes. At the time Philips had already developed and patented power pentode designs, which were rapidly replacing power triodes due to their greater efficiency. This is historic data that we found on the internet. The biasing target should be approx 60% to a max 70% of max plate dissipation of the tube. TK-6550, Vacuum Tubes, TELEFUNKEN BLK DIAMOND 6550. View 6550 datasheet online at HeberTech. FAQ; Logout; Register; Home Forums At the Workbench By the Bench; Donations. It should be quite obvious from the photographs that the design and construction of a pair of amplifiers this size is by no means a small undertaking. The data on this page reflects the approximate year that these amplifiers were made and not the actual dates of manufacture of the amplifier. A lot has happened since we began operation in 1951 and developed the beam-power Pentode tube, but at Penta Laboratories our core mission has remained unchanged: To provide a premium product and do our very best to assure customer satisfaction by delivering an exceptional level of service. Reviews (503) 241-0716 reviews and information for Tube Forgings Of America Inc in Houston, TX. rectifier tube: an electronic tube, used in x-ray transformers, to convert alternating to direct current. 34) Hi, I have a 6550 tube that I would like to test, but do not find it list on my roll charts of my Hickok 6000 or Hickok 6000A tube testers. Title: 6550A Author: General Electric Subject: JA-FP-2001-12-02 Created Date: 12/2/2001 4:32:10 PM. So as an example if your plate voltage is 450v, 24. com From the round transformer covers to the quarter inch front panel of black or silver aluminum, the Fusion 801 is a clear statement of elegance. Typical lumen outputs Table 2 Wattage 1000 hr output 2000 hr output [75] 6550. The current can be calculated by dividing by the plate voltage. The Tungsol 6550 Tube is made in Russia and renown for its tone and character. Abstract: KT88 GEC 6550 KT88 6550 Tube tubes kt88 CV5220 GEC KT88 valve 6550 kt88 data Tube 6550 Text: is similar to the 6550. Please see Terms of NCNR; Traceability data (i. At the time Philips had already developed and patented power pentode designs, which were rapidly replacing power triodes due to their greater efficiency. If the voltage is too high, make the resistor higher in value, or vice versa. 27: How to Test 6550 Tube on Hickok 6000 (6. Corrado Facchi. What are some applications of vacuum tubes? Up until recently, vacuum tubes were in much wider use in electronics around the world. Find everything you need for your next creative project online. The Tung-Sol name and trademark have been acquired by the New Sensor Corporation. The screen resistors are changed from 470 ohms. According to Ludwell Sibley's Tube Lore, the 6SN7GT was registered with the RMA on March 3rd, 1941, with data from RCA and Sylvania. Good quality components are used throughout the amplifier circuit. EL34 Push-Pull Mono-Block Power Amplifiers. How you operate the tubes (push-pull, push-pull parallel, ultra-linear, class, B+, bias, operating points, etc. 8417 tube data Replacing 8417 with 6550 or KT88. In the high end audio world, there seems to be no ceiling – in terms of innovation, technology or even price! Psvane has been pumping out high end tubes since their inception back in 2010, and this year, 2018, they have launched ACME Supreme series with the intention to ‘top the tube world, be it NOS or new production’!. Finding the right tubes for your purposes is easy when you shop on eBay, and here are some of the things that you should know before you select a tube for your device. It blew fuses regularly, and when I looked, it had a pair of el-cheapo chinese noname EL34s in it. Tube data & amp schematics online 4CX250B If you're used to glass power tubes,the idea of getting 600W out of two tubes that are half the size of a 6550 might. This is a depository for various audio designs and projects - mostly tube - that I've put in the public domain, as well as additional info to support magazine articles that I've written, and an ever-growing amount of technical data archives relating to vintage and tube audio. GD KT88 Retro. A log normal distribution was applied to the data to determine TWAs (for a further discussion of grab samples used to determine TWAs, see references 9. These use 2-6550's, 2-5AW4's ( you can use 5U4's ), 3-12AU7's and 2-6CL6. These are precisely matched at the factory and the results are marked on each set. 7027/7027A - this is a high power tube similar to a 6550. I want some backup tubes for my Sunn Solarus which came with original USA Tung Sols. Tell a friend. Power output: 60 Watts per channel minimum continous (both channels operating) at 16 ohms from 20Hz to 20kHz with less that 1% total harmonic distortion (typically below. I can't find in any of my tube data the settings for testing a 6550/KT88 on my TV-7 B/U tester. Fusion 801 w/ 6550's Free shipping to the lower 48 states [email protected] Typical lumen outputs Table 2 Wattage 1000 hr output 2000 hr output [75] 6550. Title: Document1 Author: Unknown Created Date: Sunday, March 17, 2002 7:08:23 PM. Electro-Harmonix owns 100% of the largest remaining vacuum factory in the world. pdf (82848 bytes) 8/03TM Ferranti CRM 8-03TM. I own more than 2 dozen tube amps, in 5 systems. There is a key between pins 1 and 8 to ensure that the tube can only be plugged in one way. The top supplying country or region is China, which supply 100% of xxx jap tube respectively. This had been the best sounding new production 6550 until the release of the JJ 6550. p = Pentode Unit. 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. In this article, the 6550 is used in a clean, sweet-sounding, single-ended design. BEAM PENTODE KT88 is a beam output pentode with an octal base and power of 42W. Fulfillment operation is ISO certified. Also for: 6550-33n, 6550-23s, 6550-63s, 6550-73n, 6550-63n. 6CA7 56 Tubes. KT-150 Tung Sol vacuum tube Test results and observations on this new tube offering. Tungsol 6550 Power Amp Vaccum Tubes. The 5881 tube is next in the sequence to the 6L6GB. The JJ 6550 can be used in quite a few 6L6 amps that don't have room. There is a key between pins 1 and 8 to ensure that the tube can only be plugged in one way. Notice: Every attempt is made to ensure the data listed is accurate. KT-88 Push-Pull Project with Hashimoto Transformers. , 12AT7, 12AU7, 12AX7 …. All tubes I have tested have within a few percent same gain at normal drive power levels. kt88 or 6550 Power amplifier Αναρτήθηκε από Electrons Ετικέτες AMPLIFIER , AUDIO , AUDIO TUBE AMPLIFIER , GUITAR , GUITAR AMPLIFIER , HI-FI , TUBE. Dont waste your time. But it comes down to features, functionality, accuracy, repeatability and price! All tube testers are test equipment and will require maintenance and calibration from time to time. Reporters Reid Frazier and Susan Phillips cover the commonwealth’s energy economy. It produces 70w per channel from two tubes 6550 per channel and it uses at its drive another 6 lamps per channel + 1 tude 6550 as stabilizer total 17 tubes (5 - 6550 8 - 6fq7 and 4 ?. Only a few of the most popular tubes are shown. The idea of the Grand Tube Review came from my long (20yr+) tube rolling history with the 6DJ8/6922/6N23P/E88CC tube type. 6550 k,g3 st- 16 bottom view basing diagram jedec 7ac pin 1 no connection or base shell glass bulb large wafer octal with barriers 7 pin low loss 87-99 the 6550 is a beam pentode power amplifier primarily designed for audio service. However many fancy gizmos the techs devise to give us “warm, tube-like” guitar sounds, real tonehounds know it’s only happening in one place: real tubes! If you want to get it happening for you, though, you’ve got to understand what’s going on with different tube types, and learn the. Radio tubes are valves. pdf (82848 bytes) 8/03TM Ferranti CRM 8-03TM. For operation at the 100-watt output ratings, the cur- rent swing Of 4 to 41 ma. R49 sets the bias level. Buy Groove Tubes GT-6550-C R3 Quartet Power Tube at Amazon UK. 5 volts, therefore, a simple dropping resistor would not provide correct heater voltage under all circumstances, in addition to generating 30 watts of heat. Because of our tradition of supplying the highest quality tubes, we are proud that our ouput is the very best in the world for upgrade and replacement. Read their reports. Mechanical Data:. 6BQ5 7 Tubes. History of Vacuum Tube / Thermionic Valve The history of the vacuum tube or thermionic valve from the first observations of the Edison Effect through early developments such as Fleming's Oscillation Valve and de Forest's Audion. The =C= has a nice balanced tone without getting brittle in the highs, a good offering. The idea of building a DIY audio vacuum tube amplifier based on high-quality materials begins in the early 90's. This pair represents the earlier, much harder to find 6550 version. Tube Testing Equipment Why We Don't Sell Certain Brands Filter by All 300B / 845 / VT4C & Other Triodes 6550 / KT88 / KT120 / KT150 6BQ5 / EL84 / 7189 6L6GC / KT66 / 5881 6V6GT Types EL34 / 6CA7 / KT77 Misc. Computer matched valves and curve traced for platinum matching. Octal, IO) K8A, USA 1935 and Power/Output shown. We find this incorrectly! Unfortunately will the notion "equivalent" not be interpreted the same by everybody. 00 per tube. The lower end of the range will suit lower transformer impedances, and vice versa. We want you to have fun. If the tube does not getter within a day it is most likely never going to be restored to a operational relatively pure vacuum. 4 mm Working to develop FR grade (LNI). I would like to enhance this list with additional tube settings, including the ones in the official supplement pages not shown here. 00: 6008: 6008, DF67: 12. The Tungsol 6550 Tube is made in Russia and renown for its tone and character. Name: GU32: Type: double beam tetrode: Cathode type: oxide,indirect heating: Application field: oscillation and amplification RF power in metric band: Brief application. Detector tubes were taken at random times and in close vicinity to the sampling bags. 00: Hickok 539B/C: Tube Test set up manual, obsolete data, dated 1957 contains the 1920's - '40's tube data omitted in the 1974 book. Our Music-Store · Service · Shipping Charge · Payment Methods · General Terms of Trade · Legal Info · Data Protection. Glass internal anode tubes generally have the gettering material coated on anodes, which must be operated a high temperatures to activate the getter. With multiple tubes sharing the same cathode resistor, this calculator assumes the tubes are fairly well matched. Personally, I find the New Sensor Tung-Sol RI the best 6550 for guitar. 2000-05-10 Appendix of Přehled Elektronek 1956 translated to English. ZKX6550A uses reliable high quality X-ray generator. pdf (82848 bytes) 8/03QM Ferranti CRT 8-03AM. pdf (84942 bytes). The 6L6 was released in 1936 and was first announced on page 50 of the May, 1936 issue of QST magazine. Tung-Sol developed the 6550 in 1955 for use as a servo amplifier and in industrial applications. Comparing Eight Tubes For Low Power Amplifiers Article Submitted By Mike Zivkovic Of Teresonic. The EM800 indicator tubes are also installed and their circuits connected to the amplifier. 6CA7 56 Tubes. No Fear Act Data USA. GOV Disclaimer: The appearance of hyperlinks does not constitute endorsement by the United States Department of Defense, the United States Department of the Navy and the Bureau of Medicine and Surgery of non-U. 6550 tube has been the output tube of choice in high power audio amplifiers in USA. The 6550 is a beam tetrode vacuum tube introduced by Tung-Sol in 1954 for application as an audio frequency power amplifier. The British KT-88's could be up to $1,000. The JJ 12AT7 is a solid replacement for any 12AT7, ECC81, or 6201 tube. * corresponds to pentode data; O corresponds to triode data (Vp = Vs). 6550 k,g3 st- 16 bottom view basing diagram jedec 7ac pin 1 no connection or base shell glass bulb large wafer octal with barriers 7 pin low loss 87-99 the 6550 is a beam pentode power amplifier primarily designed for audio service. Regarding the picture above; No, I didn't power-up with one of each installed and yes, I had four of each of the above tubes for the shootout. Corrado Facchi. 1 watt to 1K 5 watts. In the phono section, there are 4 RCA red base 6SN7's, all measuring 85/85, 85/85, 85/85, 85/85. For road use we recommend 6550 for better reliability. A pair of these tubes in push-pull configuration can deliver power levels of 150 watts or more. (I listen to classical music and opera. The Tung Sol 6550's are around $150. Heater voltage is an important factor in tube life. EH-100* ('36 black leatherette, '37 tan aeroplane cloth/dark ver. Back to Tube Data Page. Product Review - A Comparison of 6550 and KT-88 Power Tubes - June, 2002 Jason Serinus. The Svetlana 300B is a power triode intended for use in class A, AB or B audio amplifiers. Read their reports. Pricing and Availability on millions of electronic components from Digi-Key Electronics. 6BQ5 7 Tubes. GROUPING_QUAD_EH-6550, Vacuum Tube Sets, 4 ELECTROHARMONIX 6550 EH PWR TB. HEATHKIT TC-2 TUBE TESTER MANUAL, ROLL CHART, SUPPLEMENT for sale. Made with a strong and compact glass-button-stem construction, the Tung-Sol 6550: Power tubes have a micanol wafer and metal shell base for fuller electrical insulation and increased mechanical strength. 【商品名】Groove Tubes (グルーブチューブ) GT-6550-RD Duet Matched パワーチューブ Low 【カテゴリー】楽器:ギター:エレキギターアンプ. It is dedicated to be used in audio frequency range which requires the output power 100W. They are scanned into my computer, all of the stray lines, dots, etc. The British KT-88's could be up to $1,000. Tubes and parts for hi-fi, radio and guitar. pdf (82848 bytes) 8/03QM Ferranti CRT 8-03AM. Among my first equipment reviews for this website was an evaluation of the Bruce Moore Dual 70 tubed power amp. The =C= has a nice balanced tone without getting brittle in the highs, a good offering. Well, here's a paper on how to convert QS to 6550, etc, so you can decide for yourself whether it's too complex for you or not. Its intent is to present a tribute to the contribution of Mr. EB5AGV's TV-7 Supplement Data Keep them glowing! This is a collection of tube settings for the TV-7 testers family, along with some changes to the TV-7 Technical Manuals. Although offered in good faith, there are no guarantees with this information. Electron tube Type: Brand: System: Data sheet; 8/03AM Ferranti CRT 8-03AM. The Tung-Sol name and trademark have been acquired by the New Sensor Corporation. 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. Finding the right tubes for your purposes is easy when you shop on eBay, and here are some of the things that you should know before you select a tube for your device. Arizona Tube Supply. both show date codes for 1965. A lot has happened since we began operation in 1951 and developed the beam-power Pentode tube, but at Penta Laboratories our core mission has remained unchanged: To provide a premium product and do our very best to assure customer satisfaction by delivering an exceptional level of service. 6550 Bingle Rd Houston TX 77092. Never before at this price, 811A/JAN Cetron. This means it can handle a LOT of power. All pages will be renewed in the coming months. Detector tube. Now USD ~ USD /piece. We are not responsible for any malfunctions of equipment due to inaccuracies in these tables. This list is Constantly and Perpetually under construction. It is *probably* using the data-sheet's 100W conditions. TK-6550 offered from PCB Electronics Supply Chain shipps same day. You can Get the reading direct from the current meter. The Agilent 6550 iFunnel Q-TOF LC/MS delivers the lowest limits of detection over the widest in-spectral dynamic range in a benchtop. In the high end audio world, there seems to be no ceiling – in terms of innovation, technology or even price! Psvane has been pumping out high end tubes since their inception back in 2010, and this year, 2018, they have launched ACME Supreme series with the intention to ‘top the tube world, be it NOS or new production’!. Putting it into lay person's language, think of the 6L6GB valve as a 23-watt tube. 6550-01-566-1484, 6550015661484,Tube, Sorbent. R49 sets the bias level. for many decades. 6CA7 56 Tubes. Since the output tubes are run conservatively, you could try using some old stock Tung-Sol 6550 or Genelex KT88 (I did not). Other sources were the Parts Connection catalog (1-800-769-0747), which has a large collection of reprints, old copies of the Sylvania and RCA tube manuals, and the pages of Glass Audio. Tube data and amp schematics, links to tube amp information. Nuvistors were the latest tube development at just about the same time as the introduction of the first integrated semi­conductor circuits. This had been the best sounding new production 6550 until the release of the JJ 6550. To obtain galvanic isolation between the EM800 circuit and the amplifier I used a 1:30 current transformer on the output lead to the speakers. It's maximum output power is 100 Watt for a pair. The Tung-Sol name and trademark have been acquired by the New Sensor Corporation. The screen grid resistors need lowering from 1K to 470R. 6922 3 Tubes. 34) Hi, I have a 6550 tube that I would like to test, but do not find it list on my roll charts of my Hickok 6000 or Hickok 6000A tube testers. T12 (11/2in) argon filled white tube data is shown in brackets ([ ]) ()Table 2). It was the 'better' 6L6, with higher output at the same input signal. Produced in China, Side Getter, Holes in Plate Gray Carbonizedplate. The SED (Svetlana) 6550 I find kind of flat. Its intent is to present a tribute to the contribution of Mr. These are not simple photocopies. 8W rms at triode mode. 6L6 is the designator for a vacuum tube introduced by Radio Corporation of America in July 1936. * Note that some early model numbers are a guess as Hickok produced many early items that had no model number on unit or produced many variations without changing model numbers. Can the tester do the line of tubes you plan on testing, tube sockets, operating voltages, test data available. This new blue glass 6SN7 has rich tonality and big sound stage. If using EL 34 tubes, pin 1 has to be jumpered to pin 8. The Tungsol 6550 Tube is made in Russia and renown for its tone and character. In these calculations, 5% of the cathode current is assumed to be screen current. It is not a topic that can easily be summarized. Some tubes require more bias voltage ( 6L6 and 6550 for example), while others require less (6BQ5, 7591). Click "more info" for pricing, availability, and matching options. Power Pentode The Svetlana 6550B / 6550 Vacuum Tube is a Russian glass octal type used in the output stages of high-fidelity audio amplifiers. The 6C33C-B triode output tube used in the VK-55 Power amplifier offers many times the current delivery of the more common 6550 tube used in many traditional tube amplifier designs. The RC coupled amplifier data for a 12AU7 are as follows. BEAM PENTODE 270 310 350 390 430 470 510 Ug2(V) Ua(V) Ua(V) 0 100 200 300 0 0 100 200. Although offered in good faith, there are no guarantees with this information. 4 mm Working to develop FR grade (LNI). Vacuum Tube Data Sheets. The output transformers have what you'd expect out of a Dynaco transformer, like healthy low frequency inductance , high resistance to distortion caused by output tube DC current imbalance, and low overall distortion. Tube Testing Equipment Why We Don't Sell Certain Brands Filter by All 300B / 845 / VT4C & Other Triodes 6550 / KT88 / KT120 / KT150 6BQ5 / EL84 / 7189 6L6GC / KT66 / 5881 6V6GT Types EL34 / 6CA7 / KT77 Misc. Finding advertising for B&K test equipment is pretty easy; finding tube tester advertising is something else. The tester works for all popular octal-base output tubes (6V6, 6L6, EL34, KT66, KT77, KT88, 6550, and more). In fact, fig. What are some applications of vacuum tubes? Up until recently, vacuum tubes were in much wider use in electronics around the world. ULTRA-RARE FISHER 55A TUBE POWER AMP PAIR - 6550 VERSION These Rare American Classics were produced in two different versions under the same model number. Direct heating cathode, medium power consumption triode is used for class A amplification. This is good news for your intended tube swaps as both the KT77 and the 6550 have the same heater current as the EL34. This amplifier was featured on the February 2004 Issue of the "High-Fidelity Audio: Radio Technology" by Mr. Vacuum Tube Data Sheets. I think local operator Knight Train just recently modded his 201A with a 6L6 final and made some changes to the bias circuit with the help of Camera Man. In these calculations, 5% of the cathode current is assumed to be screen current. I fond that a KT120 tended to draw less Ia at idle if plugged into a tube socket which previously had 6550, so it would appear it is safe to plug in the KT120 to replace all other beam tetrodes, ( although please don't assume anything, and don't assume KT12 will be. The ratings of the TAD 6550C-STR meet or exceed those of the classic 6550A tubes. Fusion 801 w/ 6550's Free shipping to the lower 48 states [email protected] The best places to find tube data on the Web are Duncan's Amp Pages and Frank's Electron tube Pages. Vacuum Tubes. RCA was likely the developer, since it had assigned a development number of "A4273B". (*)These specifications are provided 'as-is', with no warranty of any kind. Higher crystallinity will cause higher stiffness and a more opaque color of the tubes. Referring to the data sheet, we can see that an EL34 can be operated from a very wide range of HT potentials. You will need to be an experienced test technician to carry out these repairs. Tung-Sol developed the 6550 in 1955 for use as a servo amplifier and in industrial applications. This is good news for your intended tube swaps as both the KT77 and the 6550 have the same heater current as the EL34. I think better than 300B for cost(C/P). Tadaatsu Atarashi. A simple switch can be. These are not simple photocopies. pdf (902849 bytes) 6550A General Electric P 6550A. However many fancy gizmos the techs devise to give us "warm, tube-like" guitar sounds, real tonehounds know it's only happening in one place: real tubes! If you want to get it happening for you, though, you've got to understand what's going on with different tube types, and learn the. If you have an amp with the tubes visible, this is the coolest-looking 6550 I've seen in quite a while. pdf (135652 bytes) 6550 Tung-Sol P 6550. kt88 or 6550 Power amplifier Αναρτήθηκε από Electrons Ετικέτες AMPLIFIER , AUDIO , AUDIO TUBE AMPLIFIER , GUITAR , GUITAR AMPLIFIER , HI-FI , TUBE. 4ma for 70% setting. If using EL 34 tubes, pin 1 has to be jumpered to pin 8. The tester works for all popular octal-base output tubes (6V6, 6L6, EL34, KT66, KT77, KT88, 6550, and more). Higher crystallinity will cause higher stiffness and a more opaque color of the tubes. Finding the right tubes for your purposes is easy when you shop on eBay, and here are some of the things that you should know before you select a tube for your device. Examination of the 6550 tube data given in Table 1 shows that the most unusual requirement is the large screen current swing -between "no-load" and "full-load" conditions. Initially had to answer the question "Classic Push Pull or a Single ended amp ?". The following text is displayed in the Matlab window. Since the output tubes are run conservatively, you could try using some old stock Tung-Sol 6550 or Genelex KT88 (I did not). 6550 Electronic vacuum audio tube general electrical and mechanical characteristics continued. A favorite among hi-fi audiophiles, provides excellent value for the price. A stock 6BQ5/EL84 may work if the power and voltage conditions in the amp are not right out at the limits of the tube design. d = Diode Unit. The beam power part tells us that the tube, as RCA put it, "is a tetrode or pentode in which directed electron beams are used to increase substantially the power-handling capability of the tube. 5 watts per tube. When Svetlana began direct US export of audio tubes in the mid 1990's, they also used the 6550C designation as it was the next variant they produced after their 6550B, and aside from microphony, it is a MUCH superior tube to the junk Chinese 6550C. This is 23 Watts. Ive been playin my EL-34 JMP for a few weeks exclusivly, but tonight i plugged in my 6550 JMP after swapping a pre-amp tube and WOW!!! That 6550 sounds like 200 watts, very beefythe 34's are cool too, but lack top & bottom of the 6550's, but to be fair i really can't open them both up too much here at home, but what a difference. Well, here's a paper on how to convert QS to 6550, etc, so you can decide for yourself whether it's too complex for you or not. ) will change optimum plate to plate load impedance. LIB) using a text editor (the Matlab editor or Wordpad work fine). Can someone please provide the settings? Thanks! Bill Jewell. com - Audio Engineering since 1999 Studio & Field Recording Post Production & Mix Down Serious Sound Reinforcement ~ Jackson County OR USA. 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. I have always been amazed at the sound quality improvements that some of the better of these tubes made. It was originally designed for high-speed digital computers and was manufactured using very high quality materials under rigid controls and underwent rigorous testing. Personally, I find the New Sensor Tung-Sol RI the best 6550 for guitar. Miked by 2 BeyerDynamic M160 Ribbons, at the. It is one of the lowest-distortion tubes ever made, and is a close duplicate of the original Western ElectricTM 300B. Tube manuals give you lots of information on how to operate power tubes. Fisher later made the 55A's with EL-34's. The 6550 is a beam tetrode vacuum tube introduced by Tung-Sol in 1954 for application as an audio frequency power amplifier. In the following example we'll use 300V. For road use we recommend 6550 for better reliability. Light use, white box. 6550A GE USA NOS straight shape tube in original/white box. Chosing A Replacement Output Transformer Now lets assume we have a set that has an output transformer with an open winding that must be replaced, and the output tube is a single 6F6. of digital data thought presently to exist in the world and still have room for plenty more.