Jj kt66 tube data book

The mids are a bit more complex and its obvious that this tube makes a lot of power. Power tube descriptions vacuum tubes by jj electronic. The jj factory was born out of the ashes of the former tesla factory. Jj kt66 the jj has got to be the most rugged tube ive seen in years. Yes changing the cathode resistor would allow me to use the 5881. Nov 08, 2003 there is a way to design enough adjustment into a bias circuit to use kt88, 6550, kt66, 6l6, el34 and 5881 all in the same amp. This tube has a tone that is warm, thick, and straightforward. Gold lion el84 all tubes in the el84 family are tested in a cathode biased amp where they are really pushed and their harmonic content blooms. When i changed to kt66, i had to turn the adj quite a ways. Brief data kt66 beam tetrode a beam tetrode with an absolute maximum anode dissipation rating of 30 w. Although power pentodes and beam tetrodes have some differences in their principles of operation the beam forming plates of the beam tetrode or fifth electrode 3rd grid of the pentode, both serving to hinder the return of unabsorbed electrons. You can use acrobat for viewing and printing pdf files. Ive been really enjoying the blue glass jj kt88 power tubes in my jolida jd502p amplifier. The jj kt77 have crystal clear 3d cleans, extended lows and highs.

The 50hz measurement was used for lows, 700hz for mids and 6khz for highs. Parts free delivery possible on eligible purchases. For the most part, the jj kt77s will bias up same as an el346ca7. Buy jj kt66 vacuum tubes online, in stock and ready to ship. Jj chose not to follow other kt66 makers by ignoring any physical resemblance to the original british tubes. I would definitely try kt66 if your amp can take them which it should. With a more balanced sound than the 6l6gc, the jj kt66 is an excellent ch. Kt66 jj electronic, matched quad 4 pieces beam pentode all products. Nice mids, sparkling highs and solid bottom end characterize this tube. It is designed for use in the output stage of an a. The construction reminds me of a ge 6550, including the metal base ring. The m0 valve company limited kt66 brief data a beam tetrode. Correct orientation of the valve socket for horizontally mounting the kt66.

Kt66 genalex cryo matched quad cryoset online store genalex. Here youll find tubes by tungsol, genalexgold lion, shuguang, shuguang treasure, and jj electronic. The m0 valve company limited kt66 brief data a beam tetrode with an absolute maximum anode, valve in a stabilized power supply. Developed by philips in 1953 for use in the british mullard 510 amplifier, t he el84 pentode tube, or commonly known as 6bq5 in north america, was intended for use as an inexpensive alternative to the larger audio tubes of the time, such as el34, 6l6, and kt66 power tubes. The 1959 miniwatt technical data book from philips lists the 6bq5 as the r. Used by heathkit and leak hifi amplifiers in the 50s60s. The kt66 was very popular in european radios and audio amplifiers. Capacitors tube amp capacitors or guitar amp capacitors, our selection currently covers the most commonly used types in vacuum tube amplifier applications. Kt66 is a beam power pentode with an octal base and power of 25w.

At the bottom of this page youll find some links to other tube datasheet sites in case you cant find what youre looking for here. Power tube selection charts for highpower audioamplifiers eimac,rcapage 1, rca page 2. Due to coronavirus covid19 we have limited staff working on location. Many of the kt66 vacuum tubes listed below have tube. The bias controls the current that flows through the tube and defines the quiescent point of the tube, so that the tube reacts immediately to an input signal and so that it amplifies that signal accurately. This is a hand aligned beam power tube resulting in stable performance at higher power levels. So, even though i set them both to 65, its in a way different spot on the pot.

In general, kt66s tends to have a bit warmer sound with more low end. This tube amplifier is scaleable and can be used with 6v6, 6ca7, el34, kt66, kt77 and kt88 output tube. It has an international octal base indicated by the 3 in the part number and is found mainly in the final output stages of audio amplification circuits and was designed to be suitable as a series regulator by virtue of its high permissible voltage between heater and cathode and other parameters. Since tubedepot is in memphis, tn, the home and main hub for fedex and usps, we get very good rates, so rest assured your heavy item will be shipped at the most affordable rates. U a 800 v u g2 800 v u a,g2 800 w w a 25 w w g2 6 w w a,g2 28 w i k. The el34 is a thermionic valve or vacuum tube of the power pentode type. There is a way to design enough adjustment into a bias circuit to use kt88, 6550, kt66, 6l6, el34 and 5881 all in the same amp. Beam pentode kt66 is a beam power pentode with an octal base and power of 25w. The beam tetrode design of the 6l6 allowed rca to circumvent philips pentode patent. We still prefer the jj e34l for most applications simply because of its extended low end and the fact that its tighter and.

Kt66 gec england clear glass late 1950s cupshape getter halo cupshape getter halo, smooth rich textured sound, the oldest and 2nd best sounding kt66 ever made oldest and rarest clear glass version of kt66 asl leyla 2002 power amp marshall bluesbreaker reissue 1964 dr. Z route 66 jtm45 pure sixtyfour the 64 head quad ii thd bivalve leak 12. In a single ended amp wired as a triode it has a fuller sound than the other kt66s ive tried. Vacuum tube kt66, jj electronics antique electronic supply.

After winged c jacked up the price of the 34s, curiosity and the price of jj s 6ca7s overcame me. Kt66 equivalent kt8c gec england it is a beam power tube almost identical to the kt66 made by the same company except that is has a 5 pin british type ceramic base and a top cap anode connection. U a 250 v u g2 250 vu g1 1 v5 i a 100 ma i g2 10 ma s10,5 mav r a 23 k. Jj valve kt66 is manufactured in slovakia, what used to be the old tesla factory. This kt66 tube is rated to handle 550v of plate voltage and screen voltage. The recent introduction by new sensor of the gec gold lion kt77 replica has put in the arena a great competitor for the gec gold lion kt66 replica, produced at the same plant in saratov. They are very smooth and have the biggest low end of any current production el34. I hope others can give this power tube a try in their amps.

I also think the modern jj s take the most voltage but are not a real kt66. This tube is very much like the jj el34 but it has about 1520% more headroom. It varies with the tube maker of course, but in general kt66 have the best treble of any output t 53. For other taylor tubes, see the entire 1945 taylor tube catalog in pdf format note, 1.

A good analogy from the automotive world is the idle speed of a motor. The nature of the design of the quad ii means that it is actually pretty tolerant about tube substitution with very. Jjelectronic tubes overview product 11 of in this category first back next last. 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. Kt66 genalex matched and cryoset quad the new genalex kt66 is an exact copy of the orginal clear glass kt66. Eurotubes eurodamper tube damper rings extra large for 6550, kt66, kt88, 300b and 2a3 power tubes. I play a wide range of music, but primarily hard rock and detuned metal. Kt66 has been used in high end audio amps in europe, as well as in the legendary marshall bluesbreaker combo amps in the 196070s.

At the moment the jj s kt66 is dead cheap but performs rather well so the jj s are the real deal for me. Ive paired them with a pair of mullard cv4024 type 12at7 tubes and jj 5751s. Through popular demand because of their high quality structure and reliable performance, the jj tube range has grown considerably and now its possible to purchase a jj kt66 valve. At the moment the jjs kt66 is dead cheap but performs rather well so the jjs are the real deal for me. Test results of the jj ecc803s long plate vacuum tube. As always, please check with your amp tech before swapping different tube types. Bold designators are close or identical, italic designators are different ratings, different pinouts or different filament voltages. Vacuum tube kt66, jj electronics a sonically faithful reproduction of the original tubes with a robust construction. Octal u f 6,3 v i f cca 1,4 a typical characteristic. They currently make a range of high quality valves based on some of tesla most famous designs. This tube is as close to an nos mullard as you can get. Guitars free delivery possible on eligible purchases. The el34 is a pentode, while the 6l6, which delivers a similar range of power output, is a beam tetrode which rca referred to as a beam power tube. It may not have quite as much of an airy high frequency as the tung.

Kt66 design was sold to rca who turned it in to 6l6. At the time philips had already developed and patented power pentode designs, which were rapidly replacing power triodes due to their greater efficiency. With a more balanced sound than the 6l6gc, the jj kt66 is an excellent choice for a full bodied. Free shipping is limited to the contiguous 48 states. There will be a impedance mismatch when running the amp with tubes the output transformer was not designed for. In my renegade, 6l6 and kt66 are set to 6070 mv, per the manual. It uses the same plate structure and bottle that the jj kt88 uses but that is where the similarity ends.

Diagram and data including transformer winding data for building a 75w ab2 amp using 6l6 or 807 page1, page 2, page 3, page 4, page 5, page 6, page7, download a zip file of all fgiles on the 75wab2 amplifier by clicking here. Kt66 is the designator for a beam tetrode vacuum tube introduced by marconiosram valve co. Some have reported reliability problems while i have used the same pair for a year now. Apr 16, 2015 the 5881 wich is cross referenced against a 6l6 i understand to be a lower power version of the 6l6gc kt66. The jj kt66 is designed to be a rugged road worthy kt66 with the sonic qualities of the original g. This tube was not meant to be a copy of any prior kt66, it is a unique design based on the extremely successful jj kt88.

After winged c jacked up the price of the 34s, curiosity and the. An audio frequency generator was used to sweep from 10hz to 20khz with the input voltage measured at the 6l6gc control grid and the output voltage measured at the output transformer secondary winding while connected to an 8 ohm load. The gold lions just sound great at any volume level. Please see the substitutes at the top of the page for more details.

It was the standard output tube in the classic quad ii 1952, a version of which is still being manufactured today and in the leak type 15 1945 and tl12 1948, both among the earliest british hifi amplifiers. The oddwatt 6sl7 srpp kt77 sipp classa ultra linear diy tube amplifier project. Always a good choice for hi fi and guitarist that want that all american bigger beefy sound with enhanced tight lows and more. Jjelectronic tubes overview product 11 of in this category first back next. Mike wanted a bit of data on some of the tubes used in the new producer from the folks at 65 amps. Because of their excellent electrical characteristics and overload tolerance, kt66s are preferred by some guitar.

Jj electronic vacuum tubes, capacitors, amplifiers. With the jj you seem to get a compromise between tone and reliability. These tubes have been cryo treated, given a 24 hour burnin and then carefully matched. The plates look to have a different coating than anything else coming out of new sensor in el84s and this, combined with a heavy gage crimped plate seems to really keep the noise down. Hey viking, i have had all three in my 6100 5881, 6l6 and kt66. Over all its a bit tighter than the jj el34 which is nice for combos or hifi where the standard el34 gives more of a vintage el34 tone. I also think the modern jjs take the most voltage but are not a real kt66. Gold lion kt66 vs gold lion kt77 easyliving tubes asylum. Today i spent a bit of time working with mike franceschini over at 65 amps.