Jj tubes tend to be well made and this model fits well into the family. 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. These used but tested good tubes have repaired centering pins on the base, and the tubes are good as new. It has the harmonic complexity of an el34 in the upper mids and highs and the round low end of a 6l6 so its as.
In audio amps, the velvet smooth mids of el34 is hard to miss. You can get much darker and with more drive, more high end harmonics. Feb 18, 2012 6ca7 essentially kt88 guts in an el34 bottle, the glass shape of the bottle is the only real resemblance to the el34 reference. As always, please check with your amp tech before swapping different tube types. The el84 is a thermionic valve of the power pentode type. Svetlana el34 kt77 el34 tube el34 pentode el34 6ca7 tube el34. Beam pentode components datasheet pdf data sheet free from datasheet data sheet search for. The el34 was the 1952 successor to the very successful el37 and both share a high value of mutual conductance 11. Any exceptions will be noted on that tubes warranty tab. Pentode miniature type, 6ca7 datasheet, 6ca7 circuit, 6ca7 data sheet. This is a very rare tube that is a direct replacement for the el34 or 6ca7.
Tried the bias at 19,22 and 25 and they sounded thin and brittle on all three. Designed to the exacting specifications of the philips 6ca7 tube, this classic tetrode returns to life in a big bottle design. Rs pro gzc81, thermionic valve base octal for 6550, 6ca7. I put my old sylvania, single getter, 6ca7 s back in. Tell me about kt77 in place of el34 page 2 the gear page. Etc2, alldatasheet, datasheet, datasheet search site for electronic components and. Internally this inherent design is similar to all above mentioned beam tetrode tubes. El34 pdf high performance audio power pentode, el34 datasheet, el34 pinout, el34 equivalent, el34 replacement, el34 schematic, el34 manual. 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. Power tube descriptions vacuum tubes by jj electronic. Warranty information and return policy warranty period. It is intended for audio frequency power amplification service in either pentode, ultralinear or triode connection and single or pushpullparallel applications. Special grid windings give a unique sound for both guitar and hifi.
It is dedicated to be used in audio frequency range which requires the output power 100w. The el34 is darker but at the same time it can be shrill on the high notes. Jj electronic vacuum tubes are one of the most rebranded tubes on the market. Each tube is meticulously measured for all critical parameters of performance including transconductance, gain, noise, and microphonics. Our new ehx strings electroharmonix electric guitar strings are customdesigned to our specifications and made in the usa by a premiere string manufacturer. The jj electronic 6ca7 is a true to form reproduction of a classic tube that will work. But, between the three, the jj and eh 6ca7 and the kt77, the jj kt77 is the best of the three, being better in the highs, a cleaner midrange and just a better overall performer and the better value. The ts el34b is a new design where the plate impedance is tweaked to resemble that of a 6l6, which gives it a tad more highs and slightly fuller tone than most el34s. An extremely faithful reissue of the xf2 mullard el34 from the 1960s. So far the jj kt77, the winged c el34 and the tungsol kt120, in a primaluna amp which came with branded kt88s. Jj electronic vacuum tubes, capacitors, amplifiers. Dec 14, 2014 ive been using the shuguang treasure 6ca7 s for the last 3 years.
Elektroakustik, in partnership with jj tubes from the carpathian mountains of cadca in slovakia. Jj electronics el34 and e34l data sheet pdf el34 ei yugoslavia. All telefunken branded tubes are hand picked to be the best examples of eastern european construction in the. Heater voltage vf 6,3 v heater current if 1,5 a 6ca7 page 1 of 5. Really nice to have this tube available, its not as bright in the top end as the el34 or e34l or the kt77 but it really warm sounding and tames an overly bright amp giving a thick and woolly tone.
The jj kt77 have crystal clear 3d cleans, extended lows and highs. Pdf scanned from an original document held by the museum. I bought on here a few years ago to the jj e34ls as i play alot of ac. In a nutshell, i prefer the jj 6ca7 over the eh as the jj to me sounds a little more. Prior to this jj 6ca7 tube being introduced the choice in a 6ca7 tube was nos or the electro harmonics 6ca7eh. Datasheet rs pro gzc81, thermionic valve base octal for 6550, 6ca7, 6p3p, 8pin vacuum tubes such as el34, kt88 rs stock no. It is perfect for use with kt88, 6ca7, 6p3p, 8pin vacuum tubes such as el34 and 6550. The electro harmonix 6ca7 is built to withstand todays highgain amps while still retaining the detailed tone and component integrity of the original. All in all, id say that the jj 6ca7 is a lively, thick sounding tube, with a broader frequency range, airier mids and has less sonic trash compared to the el34. I also prefer the jj 6ca7 over the eh in the midrange as i feel it is slightly more realistic, more 3d sounding over the eh tube. A side note about the jj s is they are biased a little cool. I have only seen versions made by genalex marconiosram valve co. 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.
For the most part, the jj kt77s will bias up same as an el34 6ca7. Gec, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. El34 pushpull monoblock power amplifiers this amplifier was featured on the january 2003 issue of the highfidelity audio. Please see the substitutes at the top of the page for more details. 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. We had to include this tube in along with the el34 family. Vacuum tubes for amps pre and power tubes tubes for amps. The early genalex kt77 had a skinny bottle with a flat top.
The svetlana el34 is manufactured with the original mullard design in the svetlana factory in st. It is powered by yaqin speacial blue wave 6ca7t tubes in this luxury version which are better than standard versions default 6ca7t tubes an analog vu meter on the front panel to monitor the average of the two channel output levels. Jj 6ca7 datasheet pdf download adobe acrobat pdf reader. Octal u f 6,3 v i f cca 1,4 a typical characteristic. The el34 is a thermionic valve or vacuum tube of the power pentode type. It has a 9 pin noval base and is used mainly in the power output stages of audio amplification circuits, most commonly now in guitar amplifiers, but originally in radios and many other devices of the pretransistor era. I will keep the sylvanias for historical reference and continue to use the jj s.
This is a suitable replacement for any el34 6ca7 power pentode tube type. El34 6ca7 mullard made xf1 date code, hole in centering pin, large dark brown micanol base, rare. Each wound string is precision wrapped with round nickelplated steel onto a high carbon, hexagonshaped steel core. The 6ca7 sounds more alive and sparkly, while at the same time being smoother. These tesla el34 are nos with black bases in original tesla boxes, and are one of the best nos el34 values around. El34s is an economical method to achieve high quality sound with a minimum of driving stage components. Nice construction, good glass, and the base and pins are well assembled. Vacuum tube el34, mullard reissue antique electronic. Compared to the winged cs or the jj s they were too sweet, and tight for me. Early xf1 date code 1957 fat base type, dual ring getters, good getter flash. When buying a rebrand version, its more than likely that you will pay much more for these tubes. Pdf e34l 6ca7 19ilable el34 e34l 6ca7 e34l 6ca7 jj el34 pentode el34 decibel ug20 v25w.
Petersburg, russia, and is designed to be a direct replacement for any el34 6ca7 or equivalent. Well i just got through trying some new jj 6ca7, double getters, in my 21065, 12ax7 driver. Kt66 is the designator for a beam tetrode vacuum tube introduced by marconiosram valve co. Therefore, for downloading data sheet, please refer to el34 page. Buy jj 6ca7 vacuum tubes online, in stock and ready to ship. Bf422 high voltage transistors npn silicon features this is a pb. I had winged cs i my yjm for a while, then jj 6ca7 s which i loved but they fried rather quickly. Ktbbtk tube data sheet mechanical type base number of pins heater requirements parameter heater voltage heater current a. The sylvania 6ca7 s were the best sounding in this amp until the jj 6ca7 s were installed. The jj big bottle 6ca7 is another welcome addition to the already extensive line offered. The jj has the output of a 6l6gc and some of its characteristics, with a broader tone and harder breakup. The jj s are more musical than the sylvanias which were a little dry and sterile sounding compared to the jj s.
Vacuum tube el34, mullard reissue antique electronic supply. Pdf e34l6ca7 19ilable el34 e34l 6ca7 e34l6ca7 jj el34 pentode el34 decibel ug20 v25w. The plain strings are made from the same high carbon steel as the hex cores. 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. Jul 24, 2019 el34 datasheet pdf the el34 is a much loved audio power valve with an anode dissipation of 25 watts. If the el34 sound is a bit boxy, kt77 or 6ca7 will give you more open sound with heaviness on demand. The american retma tube designation number for this tube is 6ca7. Smooth and musical compared to what i would call, very harsh.
Direct heating cathode, medium power consumption triode is used for class a amplification. 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. Output pentode suitable for use in power amplification note that 6ca7 is essentially the same as el34, except for the physical dimensions i. Output pendode el34 is an octal power tube with a maximum plate power of 25w. Harries is believed to be the first engineer to discover the critical. Open for business music is a vital source of comfort, and it can help us get through these difficult and frustrating times. The el34 is a much loved audio power valve with an anode dissipation of 25 watts. Free device maximum ratings rating symbol value unit collector. New jj electronics power tube, add some low end chunk to your el34 tone. Svetlana el34 el34 el34 tube pentode el34 6ca7 el34 amplifier circuit tube el34 data el34 el34.
El84 datasheet pdf pentode triode, vacuum tube philips. The kt66 is the direct descendant of the harries valve developed by british engineer j. Beam pentode for af power amplifier applications, 6l6gc datasheet, 6l6gc circuit, 6l6gc data sheet. El346ca7 high performance audio power pentode he svetlana el34 is a glass envelope power pentode having a plate dissipation rating of 25 watts with convection cooling. El34 6ca7 high performance audio power pentode he svetlana el34 is a glass envelope power pentode having a plate dissipation rating of 25 watts with convection cooling. All our tubes are guaranteed for 3 months from the date of purchase. The el37 was of pinch construction whereas for the el34 mullard used the pressed glass foot construction employed on the b9a and b7g miniature. Vacuum tube 6ca7, jj electronics antique electronic supply. Reissue mullard el34 6ca7 fully tested guaranteed vacuum tube. We burn in and test screen all jj valves for all possible faults and tonal quality. We also offer current draw options for higher and lower gain output valves. Page 3 of 3 jj 6550 will not make as much power as the jj kt88 and the kt88 is thicker sounding, in fact some players feel its too thick, so if you want a fatter sounding tube than a 6l6 that breaks up earlier than a kt88 then the jj 6550 may be just right. Jj has provided another choice and another price point.