Kt88 datasheet watts. 5 to 3k and 250V-300V across the tube.

Kt88 datasheet watts f. Thread starter Tubeglowpio; Start date Jan 6, 2019; Tags amp blueglow kegger kt88 se single ended stereo tube Prev. 9 KT88 - BEAM PENTODE. This is matching data only. 9 watts is okay. Definitely my best KT88's without spending $100's per tube Compared to the regular 42 watts or even 35 watts on some more common KT88's that seems pretty high and really makes a big difference (about 10 mA) I always biased them up as 35 watt tubes. The seated height is approximately 4. For example Vg1=-5V, Va=500V. pdf (236209 bytes) KT88 Svetlana P KT88spec. 4. 90; 91; 92; First Prev 92 Based on the standard kegger voltage and current for the driver stage, the screen dissipation of 0. TUBES KT88 Result Highlights (5) Part ECAD Model Manufacturer Description Download Buy CR6KM-12A#B00: Renesas Electronics Corporation Thyristors, TO-220FN, /Tube: CR3AS-8ME#B00: Renesas Electronics Corporation Thyristors, MP-3A, /Tube: CR6LM-12B#B00: EL34 PDF Datasheet - High Performance Audio Power Pentode, EL34 equivalent, , EL34 tube, schematic, The Device is a glass envelope power pentode having a plate dissipation rating of 25 Watts with convection cooling. Push pull KT88s in triode mode can make anywhere from 15 to 30 watts per channel in most schematics I've seen. It puts out 14 clean watts in UL mode for HiFi duty. EL84 - 6BQ5; EL844 - 6BQ5 ; The KT88-TK is a beam-power tetrode that shares similar applications as the 61. It has a lot of headroom and a fat, solid tone. ). KT88 Datasheet BEAM PENTODE 6V 3V INDIRECTILY HEATED - List of Unclassifed Manufacturers KT880 SLOTTED OPTICAL SWITCHES PHOTOTRAMSISTOR OUTPUT, Match&Start with "KT88"-Total : 51 ( 1/3 Page) Manufacturer: Part No. Close (800) 222-4700 Call in for the I built KT88 datasheet, KT88 equivalent, KT88 cross reference. Monolithic Power Systems EVKT-8843 EVAL BOARD FOR MP8843. For this reason, we use the old G. Radio tubes are valves. Please enter KT88 Search Results. KT88 Tube Types. Part #: KT88. Originally introduced by GEC in 1 956, it became competition for the American-made 6550, but with the ability to handle a There's a lot of Chinese amps giving an EL34/KT88 option, but it makes little difference to the actual power output. 2017-03-28 2:11 pm #19 2017-03-28 2:11 pm I know you may not want to hear this but you might be better off just building an 80-100 watt Fender or Marshall output section. Somethinglike taking a light bulb rated at 7000hrs, use it for 6500hrs, test it, if passes the cnadle watt test, sell it as NOS. This amplifier was featured on the February 2004 Issue of the "High-Fidelity Audio: Radio Technology" by Mr. The KT88 is a commercial version of the CV5220 and is similar to the View results and find kt88 datasheets and circuit and application notes in pdf format. Specially Electro-Harmonix KT88EH Datasheet (PDF) Download Adobe Acrobat PDF reader. KT88 CIRCUIT Result Highlights (5) Part ECAD Model Manufacturer Description Download Buy TLP2701: Toshiba Electronic Devices & Storage Corporation Photocoupler (photo-IC output), 5000 Vrms, 4pin SO6L: 74HC4053FT: Toshiba Electronic Devices & Storage Corporation The KT88 is one of the few classic audio output valves. KT88-98 tetrode equivalent, beam tetrode. The 6550 has a max dissipation rating of 40W, while it's near equivalent the KT88 is rated at 42W. I want the amp to still feel "bouncy". When Vg2=250V. Tung-Sol KT120, which has a plate dissipation of 60 watts, making it the most powerful tube in the 6550/KT88/KT90 family. Unleash Rich Sound with the LM-88IA: Versatile Class AB Stereo Amplifier Experience the captivating warmth and clarity of the LM-88IA, a masterful blend of vintage charm and modern engineering. DOWNLOAD PDF. Description. Optek Technology. The power dissipation of beam power tube KT88-98 can deliver power of 42W. KT88-98 - Beam Tetrode. E. TAD – KT88-STR High Performance Audio Beam Power Tetrode Latest version of our TAD KT88-STR is built in the style of the early British MOV KT88. 5 ~ 6 Watt is possible where with pentode - CFB - GNFB it is 6. Octal, IO) K8A, USA 1935 and Power/Output shown. AB1 gives a continuous output of up to 100W. and became quick competition for the USA made 6550 tube. With this KT88 vacuum tube you can expect a full warm midrange, extended highs, and powerful Audio Primary Operation Suggested Tube Types Watts Impedance (R. is recommended to mount the The KT88 has an absolute maximum anode dissipation rating of 42W and is designed for use in the output stage of an a. zapnspark. Files: Datasheet I have been running 2 of these JJ-KT88 in my home built S. KT88 beam tetrode. The founder of Cary Audio, Dennis has been at the tube business for a long time. When Vg2=275V. KT88 ultralinear mode connection. Shuguang. NEW Content Creators Home Audio House of Worship ¡Obtenga asesoría en español! Llámenos hoy a (800) 222-4701. M. KT88 Price and Stock . Due to its rugged construction and conservative ratings, it is the most reliable current production EL84 KT88 datasheet, KT88 tetrode equivalent, JJ, Features and benefits, Stock and price. Wonderful tone and great appearance made this tube the most attractive choice for high-end audio applications and powerful However, looking at the KT88 datasheet it seems this tube might be most comfortable with 2. 5mh rt1 l2 2. L. kt88 b+ grid bias 465v fb in fb kt88 ecc88 ef86 kt88 –80v –80v r38 270r/2w 270r/2w r32 4k7 r29 68k r28 r27 220k r26 220k r3 270k r4 27k r1 330r r2 68k c6 22µf 500v c5 10µf c4 220µf 500v c3 220µf 500v c9x 0. Carbonized screen grids and gold-plated grid wire contribute to its exceptional performance. They had obviously chatted to MingDa, and modified (at factory) to use KT88's instead of EL34's. Though matching and quality are two fully different things. Analog Metric Limited Email: [email protected] Shuguang Vacuum Tube KT Series Beam Tetrode: KT88-98 (KT88) Compatible with: 6550 and CV5220 DE. Its exclusive screen-grid radiator The new KT88 features greatly enhanced sonic performance: Increased peak cathode emission from new cathode materials; Stable operation from extended processing and aging; Gold The KT88 has an absolute maximum anode dissipation rating of 42W and is designed for use in the output stage of an a. This applies especially to power tubes like EL34, 6550, 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. The monoblock tube amp kits arrived about two weeks after placing the order in two double boxed packages, each package weighing about 6. 2008-12-29 6:42 pm #2 2008-12 I don't know about the power handling of the recent EH KT88's. 0 1 Download. 6 A MAXIMUM RATINGS Absolute and Design Maximum Va KT88 SINGLE-ENDED STEREO AMPLIFIER Stereo 6-8 Watt/channel Single-Ended Zero-Distortion *Prototype sold – taking pre-orders for production units. The Kt88 datasheet may include specifications related With a massive plate dissipation of 70 watts, than typical KT88 tubes. 8 years later. Download KT88 Datasheet. They sound great with 5" full range folded horns and on the old Wharfdale 9. Companies including Leak, McIntosh, Dynaco, and Harmon-Kardon all offered high-end amps that would take advantage of the KT88 tube's abilities. It's only 300mA according to the datasheet, but it's measured nearly 400mA on my equipment. Joined 2006. Two tubes in Class AB1 give a continuous output of up to The new KT88 features greatly enhanced sonic performance: Increased peak cathode emission from new cathode materials; Stable operation from extended processing and aging; Gold use in the output stage of an a. That's why I recommend the Antek PT's. The device has an anode dissipation of 35W and is primarily designed for the output stage of an a. 2 The KT88 is one of the few classic audio output valves. KT88 Power Tube - Single Tube. 5% distortion. I guess I should have added this to begin with. TT21 / TT22 have 37,5Watt plate dissipation, same as KT88, but they mention 45 Watt in the data sheet too, saying it's possible at shorter lifetime. A pair of these tubes Description. pdf (434345 bytes) KT88 : JJ P KT88. KT88 SE Stereo Amplifier – Hand Wired Dimensions: 18. With its robust 42 watts per channel, this Class AB integrated stereo amplifier invites you to dive deep into your favorite recordings, unveiling layers of detail previously hidden. 6 volts (208 watts). for audio serice applications oxide coated indirectly heated unipotential cathode any mounting position direct interelectrode capacitances without shield Dennis Had Inspire IFA-1 Single Ended KT88 amplifier. Very powerful and great for bass, guitar and Hi-Fi amplifiers. Go. The Datasheet Archive. As a result, KT88's and 6550's are produce cleaner tones and have low Product datasheet Created Date: Forty-two watts per channel, Class AB Integrated Stereo Amplifier with KT88 (JJ Electronic) output power tubes, 6CL8A (Mullard) and 12BH7 (Electro Harmonix) input tubes. 1 Go to page. Datasheet: Description: List of Unclassifed Man KT88: 618Kb / 8P: BEAM PENTODE 6V 3V INDIRECTILY HEATED The kits are available in two versions, KT77 rated at 15 watts and KT88 rated at 25 watts which I decided to try. Due to many requests by fans of our Tung-Sol line of tubes, the Tung-Sol EL84/6BQ5 has been reissued. How you operate the tubes (push-pull, push-pull parallel, You sacrifice some power doing that, but no feedback is necessary, so it makes around 6 watts. T amp (9 Watts) . Heck, with the 275 volt antek you could get 90 watts out of a pair of EL34s! The Datasheet Archive. Download. 5 ~ 7 Watts at slighlty (!) higher distortion levels. Two valves in clas. BEAM PENTODE 6L6GC is a beam power pentode with an octal base and power of 30W for use in 6L6 amplifiers. Output Power and Distortion. They just say the tubes are "good" and "well-tested". 7 ma U g1 = -15 V S = 11,5 ma/V R i = 12 kΩ µ-g1-g2 = With a gold-plated molybdenum alloy grid and carbon-coated screen grid, the Svetlana KT88 is the finest power tube of its type being manufactured today. Download PDF Datasheet Feedback/Errors. 5 inches wide by 12 inches deep by 8 inches high Weight: 33 pounds Our KT88 SE Stereo Amplifier has lower distortion than a SE triode amp. KT88: A. BEAM PENTODE 6550 is a beam output pentode with an octal base and power of 35W. Big bottles (6550/kt88) generally require higher voltages to make big power. I think it’s the output transformer impedance that limits the output power to 110-112 watts clean RMS (42. The starting point of Vg1 was adjusted to -3V, The KT120 and others are a clone of the KT88 and produced for those wishing to push the limits in my view. Two valves in Class AB1 give a continuous output of up to 100W. EL84/6BQ5 REISSUED. If I get 60 "clean" watts out of them, I'm happy. Those tubes are still in the amp. The figures given are for single ended use, but the valve is almost invariably used in push pull pairs. KT88 Datasheet. pdf (633155 bytes) KT88 GEC P KT88_GEC. Push pull KT88s in PUSH - PULL "CLASSIC" TUBE TYPE OUTPUT TRANSFORMER Suggested Tube Types Cat. f. . 5h c7 330µf r5 27k r6 470k 3w r33 4k7 r30 A. In later years, 6550 tubes were used in popular guitar amplifiers, notably in I'll be running at about +490 using standard Marshall 100 watt PT Also, I don't need the full 100 watts out of them. 6. About 40 volts are dropped across the cathode resistor so the tube eats 390 volts at 80 mA for 31 watts of dissipation. TUBE KT88 Result Highlights (5) Part ECAD Model Manufacturer Description Download Buy CR6KM-12A#B00: Renesas Electronics Corporation Thyristors, TO-220FN, /Tube: CR3AS-8ME#B00: Renesas Electronics Corporation Thyristors, MP-3A, /Tube: CR6LM-12B#B00: Download KT88 Datasheet. Warranty Information and Return Policy Warranty Period: Used them in my sunn 1000s guitar amp took a little bit more time to break in the EH-KT88 tubes. Odd Block KT88 Series 1 Tube Amp Kits. sold 100% on kt88 push pull in the 60ish watt class project starts here with this . KT88-98 Datasheet. KT88 max 52,0 max 110,0 max 125,0 Base: OCTAL U. Dennis Had is a legendary name in tube audio. DC, at idle 235 mA Plate dissipation, peak or idle 44 watts Screen grid dissipation, peak or idle 10 The Kt88 datasheet may provide information on the amplification factor, guiding users in selecting the suitable operating conditions for their audio amplification requirements. With an anode to anode load of 4,000 Ohms and 550 Volts on the anode a pair run in ultra linear AB1 will deliver 100 Watts at 3. TT21 has it's own datasheet, it differs mainly because of maximum 800V plate voltage. It can also be used in 6550 amplifiers. KT88 is a beam output pentode with an octal base and power of 42W. KT88 penthode mode connection. Logged You should also see from the datasheet that for similar supply voltage you will get less output power than in fixed bias (mostly because of the change in The KT88 was invented by Marconi-Osram Valve Co. Thanks to Frank Philipse for supplying the above PDF GL-KT88 Datasheet. The datasheet rating is the MAX plate dissipation rating and not an indication of how they should be biased up. KT88 datasheet, KT88 pentode equivalent, ETC, Features and benefits, Stock and price KT88 GEC P KT88. T he Svetlana™ KT88 is a beam power tetrode having . KT88 Datasheet, Features, Application. You may even find data on the KT88 box, saying: IP=44mA, Gm=10. Now in his retirement, Dennis builds one-off single ended amplifiers out of his workshop in Cary, North Carolina under his "Inspire" brand. 6V6 Tube Stereo Amplifier Schematic (6SL7 input) - [12 Watts, PP, class-AB1] - (DIY) KT88 Tube Mono Block Amp Kit (5751 SRPP input) - [25 Watts, SIPP, class-A, UL] - (Kit) The original 6550 tube was a pear shaped high power tetrode designed for power control by American Tung-Sol company. S. Datasheet: 618Kb/8P. The saying, “the [] Pro Amplifier VSQ65 - ALL Tube KT88 English Guitar Amp - 65W Watt RMS - Maroon Fully Serviced New Tubes, Sounds Amazing + Flight Case plate voltage than other power tubes. so with that in mind even 40 watts would be enough. 5W CCS (Continuous Commercial Service) Historical KT88 and 6550 and KT90 datasheets here (scroll down to KT88 or 6550 or KT90) we're working on this part. Two valves in Class ABI give a continuous output of up to IOOW. They sound wonderful, I bought from the Tube Store some years ago. KT88 triode mode connection. The 5881 (mil-spec 6L6GB) was 23W, and the 6L6GC 30W. Em: 8m Sq 8m SN 02 > 7 >006 H mm: This amp is biased at 69% of 42 watts (29 watts per tube). Power tubes. 11 amprmur [or KT-88 Push-Pull Project with Hashimoto Transformers. pdf (70096 bytes) KT90 Ei P KT90. Description: BEAM PENTODE 6V 3V INDIRECTILY HEATED. 1 µf 70+ v c2 1000pf c8 330µf c1 120µf 500v d1 d2 f1??a l n sw1 dpst l1 1. pdf (9774126 bytes) KT88 M-O Valve P KT88. Gold plated control grid for improved fidelity. the original 6L6 and 6L6G's dissipation limit was 19W. Every power tube is different. 6's (4 way I think). New Sensor now announces the Tung-Sol KT120, which has a plate dissipation of 60 watts, making it the most powerful tube in the 6550/KT88/KT90 tube family. While often compatible with KT88 amplifiers, you should check with your amplifier's manufacturer before trying these. The 500 Pa =35W 300V vgt=ov 400 = IOOV =200V =IOOV 150 IOO 200 The one app-point in the datasheet shows a 400V condition. Marshall also got into the action a few years later when they released the 200 watt Marshall Major amplifiers. I know a while ago a USA based dealership was offering the MingDa MC34AB as a MC75 option. 4 KT880 - Slotted Optical Switches Phototransistor. KT88 datasheet, KT88 pdf, KT88 data sheet, datasheet, data sheet, pdf, etc, BEAM PENTODE 6V 3V INDIRECTILY HEATED KT88 Datasheet (HTML) - List of Unclassifed Manufacturers: Similar Part No. The 6550 tube became quite popular in American audio amps in 1950s and 1960s due to its linearity and high power output. LM-88IA Amplifier can operate in two different ways Auto-biased or KT88-98 Datasheet, Shuguang. For audio frequency amplifier, if two tubes are used as class AB amplification, the output power can reach 100W. Distributors: Part: Package: Stock: Lead Time: Min Order Qty: What type of valve is a KT88? The KT88 is a Beam power valve with an anode/plate dissipation [originally] of around 35 watts, it is sometimes referred to as a pentode by some people, but in fact the clue is in the title “KT” which Super-premium Octal Beam Tetrode, impervious to overload when used at parameters found in existing 6550/KT88/KT90 circuits. 31 Kbytes. F. The width is 2" (52mm). rating / M : 1. 51 Results carries a 70 watt plate dissipation rating which provides for push-pull amplifier designs up to 200 watts output. Plate dissipation of 60 watts and higher current handling capacity has allowed the design of new amplifiers which are unique, extremely powerful and stable. The KT88's have a nice bouncy feeling to Maximum power output of 146 Watts comes in the efficient Class C mode, The data-sheet says that the TT21/22 may be used, as a pair, in place of the KT88 for audio use. 155 watt max. A. Warranty Information and Return Policy The Datasheet Archive. 5" (113mm). I'm intending to run local cathode feedback on the output stage. Tadaatsu Atarashi. Avg. They used to be cheap on Ebay, but boy these days have gone. Although they chugged up there to a maximum of 57. It is very nice and the weight is very manageable as well. Later, GE and Philips produced straight bottle 6550s. KT88-98 datasheet, KT88-98 equivalent, KT88-98 cross reference. In UL and CFB about 5. Manufacturer: List of Unclassifed Manufacturers. It uses 6SL7 drivers with the sections paralleled. Rather than having a new and unsed tube in a box that has been sitting for a few decades. KT88 TUBE Result Highlights (5) Part ECAD Model Manufacturer Description Download Buy CR6KM-12A#B00: Renesas Electronics Corporation Thyristors, TO-220FN, /Tube: CR3AS-8ME#B00: Renesas Electronics Corporation Thyristors, MP-3A, /Tube: CR6LM-12B#B00: I stuck a pair of the EH KT88's in a Tubelab SSE which runs 430 volts at about 80mA on the KT88. KT88 BEAM POWER TETRODE . C. It would be an outstanding candidate for SS rectification due to the high B+ requirements (a tad over I think my favorite is still the KT88's in UL, which is what the amp was designed for. Mine will glow well below 40 Watts and like Bennybuis I can't keep them balanced either. 5 volts on a 16 ohm dummy load) with the KT88’s. 4 kg (14 lbs. All power tubes are Platinum Screened & Tested to the highest standards, including a 72-hour burn in process, and testing at real-world voltages. Does anybody have any datasheet and/or charts for Sovtek KT88? Thanks, Miha . Mikael's KT88 single-ended design should make 7 or 8 watts per channel (mine come in at almost 8). datasheet for the KT88 which has such data called "Characteristic". Kegger/blueglow kt88 project. ) (Ohms) 1608 10: 8,000 ct Push-Pull (2 Tubes) 6AQ5, 6V6, 6BQ5, EL84, SV83 1609: 10 10,000 ct KT88 Datasheet. Other Tung-Sol tubes. File Size: 618. 1. amplifer for which two valves will provide up to 100W output. The RE 40 AK is also suitable for use as a seri. beam pentode Base: OCTAL Uf = 6,3 V If = 1,6 a Typical Characteristics: U a = 250 V U g2 = 250 V I a = 140 ma I g2 = max. Plate voltage at 65mA per tube is 450 volts. Additional Information and Downloads. It uses t KT88 for 80 watts and has a very similar tone to a twin. ) . I'd be interested in trying the Sovteks KT88 Datasheet, PDF : Search Partnumber : Match&Start with "KT88"-Total : 51 ( 1/3 Page) Manufacturer: Part # Datasheet: Description: List of Unclassifed Man KT88: 618Kb / 8P: BEAM PENTODE 6V 3V INDIRECTILY HEATED OPTEK Technologies: KT880: 279Kb / 7P: SLOTTED OPTICAL SWITCHES PHOTOTRAMSISTOR OUTPUT The amp is a Cary SLi80 signature, GL Kt88's output is 40 wpc triode-80 watts UL speakers are 4 ohm est 86 db efficient. The Tung-Sol EL84/6BQ5 was a popular OEM tube for American-made EL84/6BQ5 guitar amplifiers, such as those built by Gibson and Harmony. Audio Watts Primary Impedance Tube Types 1608 10 8,000 ct 6AQ5, 6V6, 6BQ5, EL84 1609 10 10,000 ct 6AQ5, 6V6, 6BQ5, EL84 Original: 1650F 1650H 1650K 6146B, 6550B 6L6GC 5881 tube el34 807 tube el34 tube 6a3 tube kt-88 kt88 tube KT88 6L6GC TUBE: PDF 6l6 ultralinear The Tung-Sol KT120 has a plate dissipation of 60 watts, making it the most powerful tube in the 6550/KT88/KT90 family. total 930watts. 3 V I h (approx. Genalex BEAM PENTODE 6‘3V INDIRECTLY HEATED KT88 Tlu: mas has an anode dissipation or saw and is prinmnly dusrguemur the uuzpm Stage or an . The 6pi3c is also commonly marketed as the "Sovtek 5881", which with a safe dissipation above 30W, isn't a true 5881. OPT is 5K ohms. Using a sunn cabinet with 6 12 inch Pyle driver vintage 1980s speakers. 2 KT88-98 - Beam Tetrode. construction features provide for reliable oper-ation at full ratings. HEATER V h. The KT88 is also suitable for use as a series valve in a stabilised power Title: KT88 Author: GEC England Subject: JA-FP-2000-10-01 Created Date: 10/1/2000 7:37:10 PM KT88 a. KT88 ISSUE 3 The KT88 has an absolute maximum anode dissipation rating of 42W and is designed for use in the output stage of an a. (TT21 and KT88 have the same plate. ETC. amplifier. Please see the substitutes at the top of the page for more details The Datasheet Archive. 000 and that's it. A pair of these tubes in push-pull configuration can deliver power levels of 150 or more watts. No. - KT88: Manufacturer: Part # Datasheet: Description: OPTEK Technologies: KT880: 279Kb / 7P: SLOTTED OPTICAL SWITCHES PHOTOTRAMSISTOR OUTPUT KT880L11: 279Kb / 7P: SLOTTED OPTICAL SWITCHES PHOTOTRAMSISTOR OUTPUT KT880L15: ga('set', '&cu', 'EUR'); ga('ec:addImpression', { 'name': 'KT88-STR REDBASE TAD Premium Matched', 'id': 'RT891', 'price': '73. It does have 4 ohm/8 ohm switches, playing them pretty loud on triode, Per the KT88 datasheet, the load for UL and triode are effectively the same. Sweetwater Gear Exchange Integration Studios . lordoff. Same big and heavy glass envelope and beautiful polished metal base. Two valves in Class AB1 give a continuous output of up to The KT88 has an absolute maximum anode dissipation rating of 42W and is designed for use in the output stage of an a. When used at the The KT88 is also suitable for use as a series tube in a stabilised power supply. 5 to 3k and 250V-300V across the tube. BEAM PENTODE, TUBE: EL84: Pentode Triode, Vacuum tube – Philips: ECL86: The Gold Lion KT88 vacuum power tube delivers a smooth, big, and tight sound. Filter by Manufacturer. KT88: pdf Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. Tube Matching Information: Power Tube Matching FAQ Perfect Pair System Downloads: Tung-Sol KT150 Datasheet (PDF) Download Adobe Acrobat PDF reader. JJ-KT88 Datasheet by TubeDepot. 95', 'brand': 'Tube Amp Doctor GmbH Philips KT88 DATASHEETS Philips DATASHEETS. 37. Two valves in Class AB1 give a continuous output of up to The KT88S has an absolute maximum anode dissipation rating of 50W and is designed for use in the output stage of an a. Its clarity and tonal balance make it a favorite among musicians and audiophiles. Member. Em: 8m Sq 8m SN 02 > 7 >006 H mm: Tube KT 88 or Röhre KT88 ID19153, Beam Power Tube, Octal (Int. 51 Results JJ Electronic KT88 Factory Data Sheet: KT88 Factory description: Has more power, a wider frequency response and dynamic range than any other KT88/6550 on the market. 6 and El-34, and is one of the largest tubes in its class. pdf (67175 bytes) KTW63 : Marconi q Still most folks do not really need more than 40 to 45 watts of audio power. The KT88 is also suitable for use as a series valve in a stabilised power supply. JJ-KT88 Datasheet. Very powerful, with strong bass and very bright highs.