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ECC81 Pinout
basing pinout

 

ECC81 Substitutes
Close or identical 12AT7, CV10662, CV455, CV8154, CV9859
Different rating or performance 12AT7WA, 12AT7WC, 6060, 6201, 6679, 7492, 7728, A2900, B152, B309, B739, CC81E, CK6201, CV4024, E2157, E81CC, ECC801, ECC801S, M8162, QA2406, QA2407, QS2406

Warning: 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.

 

ECC81 Ratings
Vh Ih VaMax VhkMax PaMax IkMax
6.3 0.3 300 90 2.5 15
12.6 0.15 300 90 2.5 15

 

ECC81 Application Data
Class Va Vg1 Ia Ra S
Triode 100 -1 3 16,500 3.75
Triode 170 -1 8.5 11,000 5.9
Triode 200 -1 11.5 10,500 6.7
Triode 250 -2 10 11,000 5.5

 

ECC81 Data sheet links
Dave Cigna''s Pages (DuncanAmps mirror) 12AT7: html
David Crittle''s site (Retrovox) 12AT7: Acrobat PDF application sheet
Duncan''s Amp Pages A2900: Acrobat PDF
Peter Millett 12AT7: Acrobat PDF 190K, Acrobat PDF 73K  6201: Acrobat PDF 517K
National Valve Museum ECC81: html  B309: html2
oldradio.qrz.ru ECC81: MAZDA Valves & Picture Tubes Data, MK buizen handboek
Penta Laboratories ECC81: Acrobat PDF
Frank Philipse 12AT7: 093/1/12AT7.pdf  ECC81: .gif file, 010/e/ECC81.pdf, 030/e/ECC81.pdf, 082/e/ECC81.pdf  12AT7WA: 087/1/12AT7WA.pdf, 138/1/12AT7WA.pdf  6201: 009/6/6201.pdf, 030/6/6201.pdf, 079/6/6201.pdf, 093/6/6201.pdf, 117/e/ECC801S.pdf  6679: 049/6/6679.pdf  B309: 126/b/B309.pdf
Frank Philipse (Pocnet mirror - Patrik Schindler) 12AT7: 12AT7.pdf (114339 bytes), 12AT7.pdf (1275250 bytes), 12AT7.pdf (153704 bytes), 12AT7.pdf (169445 bytes), 12AT7.pdf (349186 bytes) (fr), 12AT7.pdf (364446 bytes)  ECC81: ECC81.pdf (100668 bytes), ECC81.pdf (150741 bytes), ECC81.pdf (415333 bytes), ECC81.pdf (598435 bytes), ECC81.pdf (98394 bytes) (de)  12AT7WA: 12AT7WA.pdf (332854 bytes), 12AT7WA.pdf (336796 bytes), 12AT7WA.pdf (5129310 bytes) (fr), 12AT7WA.pdf (646705 bytes) (fr), 12AT7WA.pdf (872338 bytes)  6060: 6060.pdf (82914 bytes)  6201: 6201.pdf (386816 bytes), 6201.pdf (494719 bytes), 6201.pdf (528431 bytes), 6201.pdf (571768 bytes), 6201.pdf (572636 bytes), 6201.pdf (902849 bytes)  6679: 6679.pdf (100242 bytes), 6679.pdf (197556 bytes), 6679.pdf (337075 bytes)  7492: 7492.pdf (84101 bytes)  7728: 7728.pdf (177245 bytes)  B309: B309.pdf (312704 bytes)  E81CC: E81CC.pdf (314820 bytes) (de)  ECC801S: ECC801S.pdf (214912 bytes) (de), ECC801S.pdf (311423 bytes)
Frank Philipse (Wildcat mirror - Jörg Jan Münter) 12AT7: 12AT7.pdf (114339 bytes), 12AT7.pdf (1275250 bytes), 12AT7.pdf (153704 bytes), 12AT7.pdf (169445 bytes), 12AT7.pdf (349186 bytes) (fr), 12AT7.pdf (364446 bytes)  ECC81: ECC81.pdf (100668 bytes), ECC81.pdf (150741 bytes), ECC81.pdf (415333 bytes), ECC81.pdf (598435 bytes), ECC81.pdf (98394 bytes) (de)  12AT7WA: 12AT7WA.pdf (332854 bytes), 12AT7WA.pdf (336796 bytes), 12AT7WA.pdf (5129310 bytes) (fr), 12AT7WA.pdf (646705 bytes) (fr), 12AT7WA.pdf (872338 bytes)  6060: 6060.pdf (82914 bytes)  6201: 6201.pdf (386816 bytes), 6201.pdf (494719 bytes), 6201.pdf (528431 bytes), 6201.pdf (571768 bytes), 6201.pdf (572636 bytes), 6201.pdf (902849 bytes)  6679: 6679.pdf (100242 bytes), 6679.pdf (197556 bytes), 6679.pdf (337075 bytes)  7492: 7492.pdf (84101 bytes)  7728: 7728.pdf (177245 bytes)  B309: B309.pdf (312704 bytes)  E81CC: E81CC.pdf (314820 bytes) (de)  ECC801S: ECC801S.pdf (214912 bytes) (de), ECC801S.pdf (311423 bytes)
Triode Electronics 12AT7: gif1, gif2, gif3, gif4, gif5
TubeZone 12AT7: pdf
Virtual Valve Museum ECC81: HTML page

Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. Please see the substitutes at the top of the page for more details

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