Preamp tubes 12au7 ecc82 cv4003 5814 tube basics and faq. I tried ecc81, does a good job, but need less gain for sure. 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. Ecc8212au7 page 1 of 4 franks electron tube data sheets. Diy 12au7 ecc82 tube irf510 mosfet headphone amplifier. Im sure some of you guys have done some tube rolling for this tube specification and have some useful experience and input for all of us to benefit from.
One of the most commonly found driver tubes found in pushpull tube audio power amplifiers is the 12au7 tube. Extremely rare telefunken ecc802s issue made in ulm. Tube testing equipment why we dont sell certain brands filter by all 12at7 ecc81 6201 cv4024 12au7 ecc82 cv4003 5814 12ax7 ecc83 cv4004 5751 6922 6dj8 7308 pcc88 6sl7 5691 cv1985 6n9 6sn7 5692 cv1988 6n8 hide price misc. Mar 14, 2009 well, i think i just found the ideal 12au7 preamp tube for my cj pv12, but before i disclose it, im curious, those of you that use this tube, whats your favorite 12au7 ecc82. Matched pair ecc82 12au7 ei yugoslavia telefunken long smooth plates 17mm nib. A headphone amplifier with outstanding sound quality can be built using readily available modern components. The ecc82 is a dual triode vacuum tube with medium gain and low noise. In some cases, yes, but does that make the tubes noninterchangeable. Double triode, ecc82 datasheet, ecc82 circuit, ecc82 data sheet. Namjeravao sam zamjeniti pinove za grijanje i probati ecc82. This is simple to build audiophile classa tube headphone amplifier.
So they dont drive so hard as a 83 at the same gain. Well, i think i just found the ideal 12au7 preamp tube for my cj pv12, but before i disclose it, im curious, those of you that use this tube, whats your favorite 12au7 ecc82. The perfect choice for stereo audio applications ideal as a balanced driver. Western electric altec transformer tube phono preamplifier mc stepup ecc82 ecc83. Even as it sound, by far, the least refined of all 12au7 today, it actually gives an excellent bass extension and control to its merit. Tube preamp or tube buffer with ecc82 all about circuits. Another ecc82 in the collection shows a different style of lettering in this long lived device. Vacuum tube 12au7a ecc82, electroharmonix amplified parts. The ecc82 tube type is equivalent to the north american 12au7 tube and can be used in any 12au7 or ecc82 circuit.
In television receivers the ecc82 was used as frame and line timebase multi vibrators, agc circuits and driver stages. Jan, 20 ive just switched back to mullards after using brimar ecc82 s for a while. We were surprised at the very low cv number, suggesting availability at the start of wwii even though the b9a base is post war in the uk. I have a few tubes that are marked ecc82 made in western. Double triode 5 ugv iama uav25 20 15 10 5 0 0 0 5 10 15 20 50 100 150 200 250 300 350 400. Western electric altec transformer tube phono preamplifier mc. Anode current ia10,5ma transcoductance s2,2mav amplification 17 heating. The jj ecc82 is a good solid reliable valve that gives a good rich sound. Double triode ecc82 is 12au7 medium gain preamplifying double triode. Watford valves, one of europes leading suppliers of tested, graded and guaranteed valves to the professional music industry.
Ecc82 datasheetpdf list of unclassifed manufacturers. The output stage of the circuit is a cathode follower and is suitable to drive a low impedance amplifier. It is based around 12au7 ecc82 audiophile vacuum tube that provides warm, rich and smooth sound expected from audiophile amplifiers. Jul 24, 2018 another ecc82 in the collection shows a different style of lettering in this long lived device. As well, this tubes low gain make it a great choice for tube preamps in hifi stereo systems. Potentiometer routing eagle circuit board file brd 5kb. Double triodequick reference dataanode current ia10,5ma datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. I wish that i create design tube preamp or tube buffer with ecc82 12au7 for my cd player tehnics and audio amplifier tehnics to get the realtube sound so please give recommend a good schematic circuit or project for tube preamp or tube buffer. Classa 12au7 tube headphone amplifier electronics diy. Due to the combination of low gridplate capacitance and medium gain, it is suited for use in audio voltage amplifier with an extended frequency range. Ima that optimally is a badly overused word imho, theres a lot of ways to use a tube. It belongs to a large family of dual triode vacuum tubes which share the same pinout retma 9a. Etc2, alldatasheet, datasheet, datasheet search site for electronic components and. The 12au7 and its variants are a miniature ninepin b9a base mediumgain dual triode vacuum tube.
Heating is indirect by ac od dc, with serial or parallel supply. Use of these parameters shall be entirely at the users own risk. Now, if youve interchanged x tube with y tube thats interchangeable but not electrically identical, could you change some stuff to make it work more optimally. The design is exactly the same as the 12ax7 preamp, it is a single gain stage triode tube with cathode follower. I see there is a ecc802s gold pin version that has long plates. Commonly used as a lownoise line amplifier, driver, and phase inverter in. I use the term builder as electronic experience combined with innovation which allows the creation of a device, rather than simple board stuffing. Otl headphone amplifier with ecc82 12au7 elektor magazine. 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. British mullard 12au7 ecc82 tubes 1960s british mullard 12au7 ecc82 quality tested. This tad 12au7a ecc82 has especially strong systems which are selected to. A guide to ecc83 type preamp valves and the kinds of sounds you can expect from each type. 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. Also popular for hifi applications that want the lowest noise possible.
Just curious as to what the sonic character of the long plates might be compared to the ecc82. If youre still using yours, the centre tube must remain a 12ax7ecc83 for proper riaa equalisation, but id suggest a 5751 in the rearmost position. Superior mediummu twin triode for use in preamplifier and driver circuits. The thin glass tube envelope is 20 mm in diameter and the length excluding the b9a base pins, is 48 mm. Thanks to frank philipse for supplying the above pdf datasheet. Detailed instructions to build a diy 12au7 vacuum tube irf510. Ecc82 datasheet, ecc82 pdf, ecc82 data sheet, ecc82 manual, ecc82 pdf, ecc82, datenblatt, electronics ecc82, alldatasheet, free, datasheet, datasheets, data sheet. This schematic below is a simple two stage linelevel preamplifier using a single 12au7 ecc82 tube per channel. Valves use high voltages and these voltages are dangerous. I collect vacuum tubes, vintage parts and tube gear since 1986. Eirc electronic tubes factorydata sheetecc8212au7page 1 of 4telephone. He help me find the right valve tube amperex 6dj8 bugle boy for my aune t1 dac and it has made my dac a top notch device.
Details about matched pair ecc82 12au7 ei yugoslavia telefunken long smooth plates 17mm nib. The overall voltage gain of the circuit is about 8. Pdf ecc82 7z0s05953 ecc82 ecc82 tube ecc82 tube data ecc8 ecc82 triode. Valve experts know that even power valves that can deliver.
Valve experts know that even power valves that can deliver several. Siemens chrome plater double getter support ecc82 marconi toast plate square getter wrinkle glass b329 mullard made and the surprise of the day could well be the chinese 12au7. Classa 12au7 tube headphone amplifier this is simple to build audiophile classa tube headphone amplifier. So i am glad to introduce this attractive w output transformers module type 12au7 12ax7 tube stereo phono mm mc preamplifier for real line cd sound with vintage western electric audio phono mc stepup transformers for real phono sound lprecordvinyl and w double front meters module type 300b pp monoblock tube power amplifiers. 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. 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. These specifications are provided asis, with no warranty of any kind. Text in other languages may differ dimensions whd incl. Other jj electronics tubes 12au7 tube types additional information and downloads.
A guide to ecc83 type preamp valves valve tube guitar amps. Thank you for checking out our listing we hope to work with you. We offer some of the most comprehensive testing facilities available today. There are many equivalent tubes with different names, some identical, some designed for ruggedness, long life, or other. Even as it sound, by far, the least refined of all 12au7 today, it actually gives.
We will ship your order as normal please be aware that due to the high volume of shipments in transit, you may see a delay. Price includes vat and second class post in the uk. My pre came stock with a set of the jj ecc82s gold pin 12au7. The ecc82 isused in marshall and vox amps and these are great solid sounding amps. Glass tubes included for the line stage, 12ax7ecc83 x 2.
Hi there, ive now listened and analyzed countless 12au7s and its equivalents and thought id give my opinion on my current favorites. The np100v12 is a simple headphone amplifier that allows an entry level builder to experience assembling and listening to their own creation. In television receivers the ecc82 was used as frame and line timebase multivibrators, agc circuits and driver stages. Vacuum tube 12au7a ecc82, tube amp doctor, premium. Although our storefront is currently closed, we are continuing to operate online. Guys, have quite expensive vintage amps and to increase headroom of input stage i want to put ecc82 tube instead of schematics 83. Jj 12au7ecc82 preamp tube chicago music exchange reverb. Matched pair ecc82 12au7 ei yugoslavia telefunken long. An amplification factor of 17 is quoted, and the ecc82 is virtually a pair of ec90 triodes in a single envelope but not designed for rf use. After finished my simple 12ax7 tube preamp, i decided to try other medium mu tubes, including this 12au7 and also the 6922.
We have the ecc81 ecc82 ecc83 was introduced specifically for audio applications way back in 1954 to replace the earlier 6sl7 octal based valves. I replaced it with a nos tungsram e80cc and never regretted that. Provides a very smooth sound with welldefined tones suitable for audio and guitar amplifiers. The brimars have more warmth in the midrange, but the bass was not as well contr.