The preamplifier uses the 12au7 family of tubes that also includes ecc802s and ecc82 valves. The output stage of the circuit is a cathode follower and is suitable to drive a low impedance amplifier. The 12ax7, also known as ecc83, is a vacuum tube that is a miniature dual triode 6av6 with high voltage gain. This tube featured superb linearity and extremely low noise. Files are available under licenses specified on their description page. Bc547 transistors and used ecc82 or 12au7, so the circuit operates at low voltage. Etc2, alldatasheet, datasheet, datasheet search site for electronic components and. 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. Jj ecc82 12au7 datasheet pdf download adobe acrobat pdf reader.
The 12au7 and its variants are a miniature ninepin b9a base mediumgain dual triode vacuum tube. For use in the phase inverter position, we recommend the triode matched option. 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. Pdf ecc82 7z0s05953 ecc82 ecc82 tube ecc82 tube data ecc8 ecc82 triode. 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 thin glass tube envelope is 20 mm in diameter and the length excluding the b9a base pins, is 48 mm.
A customer reported that the jj ecc802s tube is very warm and rich with a golden glow in voices. It belongs to a large family of dual triode vacuum tubes which share the same pinout retma 9a. The reissue genalex gold lion ecc82 b749 12au7 tube features gold plated pins and has been carefully engineered to recreate all of the attributes of the original. I have decided to post the scans of the original philips holland lists that were created at their headquaters in eindhoven, the netherlands.
Can be also used as replacement for 12ax7 in many applications. Valve experts know that even power valves that can deliver. Tube circuit provides classic, warm sine wave tremolo tones. It also contains a page or so of the factory codes as well. So along with a digital tube computer comes a storage room, with a few thousand spare tubes. Double triode, ecc82 datasheet, ecc82 circuit, ecc82 data sheet. Any exceptions will be noted on that tubes warranty tab. Double triode quick reference data anode current ia10,5ma transcoductance s2,2mav amplification 17.
The reissue genalex gold lion 12au7 ecc82 b749 tube is new sensors modernday effort to recreate the renowned sound signature of the vintage european original. The preamp uses a srpp circuit and the gain is either 7 or 11. 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. A headphone amplifier with outstanding sound quality can be built using readily available modern components. Provides a very smooth sound with welldefined tones suitable for audio and guitar amplifiers. We have the ecc81 ecc82 ecc83 was introduced specifically for audio applications way back in 1954 to replace the earlier 6sl7 octal based valves. Omitting the output transformer, avoiding overall negative feedback and using good coupling capacitors guarantees a highly linear frequency characteristic, while certain construction methods yield low channel crosstalk. This tube can be used without precautions against microphony in equipment which is characterized by. Vintage amperex 12au7 ecc82 bugle boy tubes, made in holland 15206576624. 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.
Ecc82 is 12au7 medium gain preamplifying double triode. Ecc82 datasheetpdf list of unclassifed manufacturers. Overall the sound is open and balanced from top to bottom, with a good deep bass. The design is exactly the same as the 12ax7 preamp, it is a single gain stage triode tube with cathode follower. 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. I tried ecc81, does a good job, but need less gain for sure.
The temperature inside such tube computers was very high, and even the ambient temperature was a. We also offer low noise option to eliminate potential issues. Preamp tubes 12au7 ecc82 cv4003 5814 tube basics and faq. All structured data from the file and property namespaces is available under the creative commons cc0 license. We offer some of the most comprehensive testing facilities available today. This tube is a premium replacement for all 12au7, ecc82, 5814, and 6189 tube types.
Ecc81 is 12at7 medium gain preamplifying double triode. For reverb driver, we recommend smaller plate 12at7 such as electroharmonix 12at7ehwc. This is a premium version of the ecc82 and again the best way to describe the difference is that the gold pin ecc82 is smoother and richer sounding. It is popular with tube amplifier enthusiasts, and its ongoing use in such equipment makes it one of the few smallsignal vacuum tubes in continuous production since it was introduced. So they dont drive so hard as a 83 at the same gain. Another ecc82 in the collection shows a different style of lettering in this long lived device. All our tubes are guaranteed for 3 months from the date of purchase. Otl headphone amplifier with ecc82 12au7 elektor magazine. There are many equivalent tubes with different names, some identical, some designed for ruggedness, long life, or other. The overall voltage gain of the circuit is about 8. The ecc802 tube type is equivalent to the north american 12au7 tube and can be used in any 12au7 or ecc82 circuit. Warranty information and return policy warranty period. After finished my simple 12ax7 tube preamp, i decided to try other medium mu tubes, including this 12au7 and also the 6922. The single ecc82 12au7 runs at low voltage for a full, rich and dynamic sound tube.
Tubes free delivery possible on eligible purchases. Ecc8212au7 page 1 of 4 franks electron tube data sheets. Thanks again paul, will find you again for 12ax7s soon. A guide to ecc83 type preamp valves valve tube guitar amps. But it is nice to have these codes available if you are not sure what type of tube you have.
This schematic below is a simple two stage linelevel preamplifier using a single 12au7 ecc82 tube per channel. 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. Guys, have quite expensive vintage amps and to increase headroom of input stage i want to put ecc82 tube instead of schematics 83. The ecc82 tube type is equivalent to the north american 12au7 tube and can be used in any 12au7 or ecc82 circuit. Watford valves, one of europes leading suppliers of tested, graded and guaranteed valves to the professional music industry.