All cryoset certified power tubes have been doubled matched, both before and after cryo treatment using the maxi matcher to verify. This is a rare matched quad of type ii ei kt90 tubes. Kt90 is designed by blagomir bukumira,a leading engineer at ei. Jan 05, 20 the kt99 is a rebranded ei kt90 type ii. I find the 90 type ii to sound a bit cooler and more forward than the other tubes on your list. Kt90 page 1 of 5 the kt90 is a beampower pentode primarily designed for use in audio frequency power amplifier applications. Great sounding tube, which is considered to be one of the very best of all kt90 tubes and could be used in the majority of 6550 and kt88 tube amps. The electo harmonix kt90 is probably the best kt90 ever built. Electroharmonix kt90 the electro harmonix kt90eh tube is a dropin for any kt88 or 6550 tube.
This switch is controlled by the enable line on the ei 1050. Kt90, kt120 and kt150 are higherpowered direct replacement of kt88. This tube excist as normal grid tube and as frame grid tube. Fl817c datasheet 4 pin dip photocoupler fangjing, fl817c pdf, fl817c pinout, equivalent, fl817c data, fl817c circuit, fl817c output, ic, schematic.
Up to 160w per pair may be achieved with anode voltage of 750v and screen grid. For a collection of datasheets, follow the link to at the top menu. Electroharmonix kt90 the electro harmonix kt90 eh tube is a dropin for any kt88 or 6550 tube. I can personally vouch for the ruggedness of the ei kt90 tubes. Sonically they are true to the electo harmonix brand.
Some folks say the ei kt90 type 2s sound as good if not better than the pricey gecs. Octal u f 6,3 v i f c a1,6 a typical characteristic. This rugged tube also found a home in the 59 fender bassman and servo amplifiers used in b52 bombers. Kt120 datasheet, cross reference, circuit and application notes in pdf format. Anode dissipation rate is 50w, which provides for pushpull amplifiers utilization up to 110w output per pair, with 550v on the anode. Also the most common electrical circuits are given for kt88 and 6550. Jan testing is a military proces for lot qualification, which makes sure that weak production series will not pass as a whole. At the bottom of this page youll find some links to other tube datasheet sites in. Kec, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Most of the datasheets are in pdf format and some are links to other html pages. The ei type 2s arent prone to glowing cherry red and overheating like the type later type 3s. The purpose of this kt88 kt66 6550 kt90 kt120 page is to give an overview about what kt66, kt88.
Type ii is the best sounding and most desirable version of this tube, and can be identified by the numberous spotwelds on the plate structure. 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. The ei 1050 adds a max4514 switch to the data line. This beam power tetrode can be used in place of 6550 and kt88.
Nos ei yugoslavia kt90 gray plate 3 mica type iii vacuum. Ei 1550 revised handbook on maintaining aviation fuel cleanliness. Kt90 note, larger 2 pages wide files, about 80kbytes each. Kt90, kt88 the electo harmonix kt90 is probably the best kt90 ever built. While we do combine shipments on other platforms, we cannot and will not combine shipping on reverb. Ei vs electroharmonix kt90 audiogon discussion forum. Here are the possible answers, only one answer is correct. Block diagram, pinout and kt90 circuit application inside. Kt90 is recommended as a replacement for 6550, 6550a and kt88.
Kt90 is a beampower pentode primarly designed for use in audio frequency power amplifier applications. It may therefore be used as a substitute, given appropriate rebiasing when. In most cases you can use these tubes in place of kt88, but its best to check with your amp manufacturer first. Gotta replace power tubes in my cary monoblocks any. Kt90 is designed by blagomir bukumira,a leading engineer at ei features. Tungsols 6550 is still excellent in overall perfor mance. The kt90 is a replacement for 6550s and kt88s and will put out a little more power. You can use acrobat for viewing and printing pdf files. This switch is controlled by the enable line on the ei1050. The tubes in this quad test asnew on my tv7du, and are very closely matched data sheet, kt805 manual, kt805 pdf, kt805, datenblatt, electronics kt805, alldatasheet, free, datasheet, datasheets, data sheet.
It also has deep solid bass, nice high freq extension and is dynamic. Ei 100c interconnect, ei 100l emergency light, ei 100s silencer. I too, am curious as to what the impressions of the eh kt90 are. Anode dissipation rate is 50w, which provides for pushpull. Nos ei yugoslavia kt90 gray plate 3 mica type iii vacuum tube. Typically, it is used in hifi or electric guitar amplifier applications. The kt90 is recommended as a replacement for 6550, 6550a and kt88. From speakers to batteries to transformers and many other components.
If you like the sound of your amps with this tube it may be worth the effort to find a quad. The kt90 is a vacuum tube used in audio applications. This is a matched quad that have been cryogenically treated. Please see the substitutes at the top of the page for more details.
If you would like combined shipping you must place your order elsewhere. In september of 1950 tungsol introduced the 5881, an uprated and industrial version of the 6l6ga with a 23. View and download ei electronics ei 225e user instructions online. If you require matched pairs or quads, simply order 2 or 4 off. Epitaxial planar npn transistor audio muting, ktd3 datasheet, ktd3 circuit, ktd3 data sheet. The purpose of this kt88 kt66 6550 kt90 kt120 page is to give an overview. View and download ei electronics ei 100b standard instruction leaflet online. Electroharmonix owns 100% of the largest remaining vacuum factory in the world.
The new kt88 features greatly enhanced sonic performance. Sep 05, 20 1 thought on ei kt90 type ii tubemaze on september 30, 20 at 1. The electro harmonix 6ca7 is built to withstand todays highgain amps while still retaining the detailed tone and component integrity of the original. The electroharmonix is oem in most current guitar amplifiers. Kt838a datasheet, equivalent, cross reference search. Kt90 and types and brands exist, and what you can do with the this tube. Kt838a transistor datasheet pdf, kt838a equivalent. 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. Kt90 datasheet, kt90 pdf, kt90 data sheet, kt90 manual, kt90 pdf, kt90, datenblatt, electronics kt90, alldatasheet, free, datasheet, datasheets, data sheet, datas.
The kt90, or in full, kinkless tetrode 90, is a beam power tetrode and features the same octal socket as its smaller variant, the kt88. I had them in my jadis for 5 years, one shorted no damage to the amp, and the others still measure a little better than pass. Kt808a transistor datasheet pdf, kt808a equivalent. The electroharmonix 6v6 is warm sounding, with a sweet sustain and crunchy overdrive, making it a very musical tube. European kt88s but the tubes can be interchanged without issues. Ei electronics ei 225e user instructions pdf download. The tubes in this quad test asnew on my tv7du, and are very closely matched kt90 power vacuum tube. Scroll down to see sets of 2 pair, 4 quad, and 6 sextet. Within ratings, curves for 6aq5 and 6v6gt are the same. Ei 1550 revised handbook on maintaining aviation fuel. Maintains both low power loss and low noise lower rds on characteristic more controllable switching dvdt by gate resistance smaller vgs ringing waveform during switching narrow band of the gate threshold voltage 4. Ei electronics ei 100b standard instruction leaflet pdf. Kt808a datasheet, equivalent, cross reference search.
Im thankful eh began production, it is a worthwhile endeavor. Apr 24, 2006 the ei s also put out a lot less heat than the ehs and valve arts. Designed to the exacting specifications of the philips 6ca7 tube, this classic tetrode returns to life in a big bottle design. Up to 160w per pair may be achieved with anode voltage of. Kt805 datasheet, kt805 pdf, kt805 data sheet, kt805 manual, kt805 pdf, kt805, datenblatt, electronics kt805, alldatasheet, free, datasheet, datasheets, data sheet. Kt90 was developed by elektronska industrija nis ei. Frank philipse pocnet mirror patrik schindler kt90. Key benefits power output vastly increased anode and screen grid maximum voltages low distorsion extended tube life general characteristics kt90 is a beampower pentode primarly designed for use in audio frequency power amplifier applications. Vacuum tube kt90, electroharmonix antique electronic supply. The sht11 speaks sbus, which is similar to i2c but not exactly the same.
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