The advantages of such a line stage are much the same as those when a srpp is used as a driver. We test each jj ecc82 preamp valve on our analogue and digital testers and give a 120 day warranty. Another common name for the 12ax7 tube is ecc83 and for premium versions the 7025 and ecc803 audio tubes. Frank philipse pocnet mirror patrik schindler, 12au7. The jj ecc82 valve double triode is used in preamp circuits, and phase splitter applications. The difference again is that the gold pin tubes are a little smoother and richer sounding and the long plates have a. Ecc82 datasheet, ecc82 pdf, ecc82 data sheet, ecc82 manual, ecc82 pdf, ecc82, datenblatt, electronics ecc82, alldatasheet, free, datasheet, datasheets, data sheet. Headphone amplifier and 12au7 tube is powered by just 12v dc voltage.
Vacuum tube 12au7 ecc82, jj electronics image 1 vacuum tube. It has a centertapped heater filament so it can be used in either 6. Eirc electronic tubes factorydata sheetecc8212au7page 2 of 4telephone. If you cant find what you need here, try duncans tube data sheet locator. With the very large number of vacuum tubes or thermionic valves that were produced and as a result of the multiple vacuum tube numbering systems that were in use, there are generally equivalents for most types of tube. The 12au7 ecc82 is a twin triode vacuum tube, it is very popular in the audio world because it is rather rugged and can be operated at lower voltages. Welcome to tubedepot javascript must be enabled to use this site. Somebody told me that 8381s are interchangeable but 83 and 82 are not.
I tried ecc81, does a good job, but need less gain for sure. Novaltypical characteristics and operating conditionsanode voltage datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. The entire 1945 taylor tube catalog in pdf format note, 1. After finished my simple 12ax7 tube preamp, i decided to try other medium mu tubes, including this 12au7 and also the 6922. It was widely used, in specialquality versions such as ecc82 and 5814a, in presemiconductor digital computer circuitry. To my knowledge this tube has been produced only in soviet union the oldest sample i found was. Ecc82 datasheet, ecc82 datasheets, ecc82 pdf, ecc82 circuit. The 6sl7 type of valve has the same base as output valves such as the 6v6, 6l6, el34 etc and were bulky, so the ecc8x. Quick reference, connected to earth, the more favourable triode section of the tube with regard to hum. Also popular for hifi applications that want the lowest noise possible. Vacuum tube 12au7 ecc82, jj electronics amplified parts. J j electronic ecc802s gold pin 12au7 factory data sheet. Just curious as to what the sonic character of the long plates might be compared to the ecc82. Vacuum tube 12au7a ecc82, tube amp doctor, premium selected.
A guide to ecc83 type preamp valves valve tube guitar amps. The output stage of the circuit is a cathode follower and is suitable to drive a low impedance amplifier. Ecc82 circuit to work with 6h6p first cut the traces or wires joining pins 4 and 5. Dec 21, 2014 output spectral analysis of tube buffer with variable second harmonic, and volume control. Vintage european and us 12au7, ecc82, 5814a, 6189, 7316, cv4003, and m86 tubes in stock now, fully tested and guaranteed.
Vacuum tube 12au7a ecc82, electroharmonix amplified parts. The thin glass tube envelope is 20 mm in diameter and the length excluding the b9a. The ecc82 or 12au7 is a miniature 9pin low gain 17mu dual triode tube. Jj ecc82s versus ecc802s tubes canuck audio mart hifi. Ecc82harma retro harma valves the harma ecc82 is designed on the ladder plate design that was used by mullard and philips. Download a zip file of all 12au7 pages byclicking here. The design is exactly the same as the 12ax7 preamp, it is a single gain stage triode tube with cathode follower. Tube ecc 82 or rohre ecc82 id1050, double triode, noval, b9a and universal shown. Please note that we can only convert videos up to a length of 1 hour the limitation is necessary, so the conversion of any video will not take more than a couple of minutes.
Etc2, alldatasheet, datasheet, datasheet search site for electronic components and. I see there is a ecc802s gold pin version that has long plates. Pdf converter convert files to and from pdfs free online. Standard replacement for all circuits requiring 12au7ecc82 types. Our service is for free and does not require any software or registration. Heres how to convert quicksilver and otheramplifiers from 8417 to 6550kt88kt90.
Main problem is the heavy use of nowunavailable ironcore ceramic coil forms. The overall voltage gain of the circuit is about 8. Text in other languages may differ dimensions whd incl. Guys, have quite expensive vintage amps and to increase headroom of input stage i want to put ecc82 tube instead of schematics 83. Please see the substitutes at the top of the page for more details. Output spectral analysis of tube buffer with variable second harmonic, and volume control.
Vacuum tube accessories vacuum tube amplifier sets vacuum tubes wire yellow jackets tube converters. This schematic below is a simple two stage linelevel preamplifier using a single 12au7 ecc82 tube per channel. This 12au7 offers smooth tones and clear definition which is why its no. The use of this valve will give more headroom and clarity and lower the gain on a over distorted valve amp. See also ecc82 from mullard that designates the valve with both the mullard ecc82 and the american 12au7 designations. Double triodequick reference dataanode current ia10,5ma datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. You can access the free pdf file converter anywhere, with an internet connection. Eirc electronic tubes factorydata sheetecc8212au7page 1 of 4telephone. In television receivers the ecc82 was used as frame and line timebase.
Tube amplifier setsvacuum tubeswireyellow jackets tube converters. The tool will instantly upload and transform the file into a pdf. Twotube converter, using the 12ek6 pentode as an rf amp in front of a 12ad6 pentagrid converter, with a switch swapping out a crystal and coil for each band. Hi there, ive now listened and analyzed countless 12au7s and its equivalents and thought id give my opinion on my current favorites. The tube is popular in hifi vacuum tube audio as a lownoise line amplifier, driver especially for tone stacks, and phaseinverter in vacuum tube pushpull amplifier circuits. However, you do need to follow some standard tube layout and construction procedures. Another 12au7 variant from jj which is a long plate gold pin version of the ecc82 tube. The 12au7 is probably the first noval b9a tube ever, registered on october 18, 1946, in the electron tube registration list, followed by the 2c51, registered on november 25, 1946. The ecc82 valve also known as a 12au7 is a low gain preamp valve used in guitar amps and hifi ampliers. Tube buffer with one double triode ecc82,ecc88 youtube. Double triode quick reference data anode current ia10,5ma transcoductance s2,2mav amplification 17 heating heating is indirect by ac od dc, with serial or parallel supply. In most cases the tubes manufactured to the european system have an exact equivalent tube in the american system and vice versa. Originally, the 12ax7 ecc83 vacuum tube was introduced to be a superior option for lower noise and microphonics over the 6sl7 tube that was commonly used in the 1940s. If we actually want to design a simple, puretube line stage for hifi i use the.
We have the ecc81 ecc82 ecc83 was introduced specifically for audio applications way back in 1954 to replace the earlier 6sl7 octal based valves. My pre came stock with a set of the jj ecc82s gold pin 12au7. The videos are always converted in the highest available quality. Vacuum tube 12au7 ecc82, jj electronics antique electronic. Vacuum tube 12au7a ecc82, tube amp doctor, premium. Diy ecc802s 12au7 ecc82 vacuum tube srpp preamplifier. This tad 12au7a ecc82 has especially strong systems which are selected to provide. However, for reasons which will become obvious, the ecc82 is the valve of choice, so i used this for.
Pretty much everything in the preamp is standard tube amplifier construction. Tc tubes and audio repair repair services include tube and solid state gear, turn table setup, and tubetesting in twin cities metro area. My pre came stock with a set of the jj ecc82 s gold pin 12au7. Ecc8212au7 page 1 of 4 franks electron tube data sheets.
For this we use a halogen lamp transformer from the shop or any other transformer with minimum 10 va and the secondary from the range between 12 and v ac. The ecc82 is a dual triode vacuum tube with medium gain and low noise characteristics, making it ideal for hifi audio equipment and instrument amplification. Double triode,alldatasheet, datasheet, datasheet search site for electronic components and. The thin glass tube envelope is 19 mm in diameter and the length excluding the b9a base pins, is 48 mm.
All 12at7 ecc81 6201 cv4024 12au7 ecc82 cv4003 5814 12ax7 ecc83 cv4004 5751 6922 6dj8 7308 pcc88 6sl7. Smallpdf pdf converter operates fully in the cloud. Tube depot not only sells vacuum tubes we also carry an extensive line of tube mount sockets, holders, adapters, bases, tube retainers and much more. The use of this valve will give more headroom and clarity and lower the gain on a.
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