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| 12AX7 Pinout |
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| 12AX7 Substitutes |
| Close or identical |
12AX7R, CV10319, CV492, ECC83 |
| Different rating or performance |
12AX7A, 12AX7S, 12AX7WA, 5751, 5751WA, 6057, 6681, 6L13, 7025, 7382, 7494, 7729, B339, CK5751, CV4004, CV4017, CV8156, CV8222, CV8312, E2164, E83CC, ECC803, ECC803S, ECC863, M8137, QB339 |
| Different filament voltage |
20EZ7, 6AX7 |
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. |
| 12AX7 Ratings |
| Vh |
Ih |
VaMax |
VhkMax |
PaMax |
IkMax |
| 6.3 |
0.3 |
300 |
100 |
1 |
8 |
| 12.6 |
0.15 |
300 |
100 |
1 |
8 |
|
| 12AX7 Application Data |
| Class |
Va |
Vg1 |
Ia |
Ra |
S |
| Triode |
100 |
-1 |
0.5 |
80,000 |
1.25 |
| Triode |
250 |
-2 |
1.2 |
62,500 |
1.6 |
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| 12AX7 Data sheet links |
| Automatica |
12AX7: html |
| Dave Cigna''s Pages (DuncanAmps mirror) |
12AX7: html |
| City Radio |
ECC83: html |
| David Crittle''s site (Retrovox) |
12AX7: Acrobat PDF application sheet |
| Duncan''s Amp Pages |
6L13/ECC83: Acrobat PDF (5 pages) Vade Mecum s.345: Acrobat PDF (2 pages) |
| Peter Millett |
12AX7: Acrobat PDF 65K 20EZ7: Acrobat PDF 186K |
| N7JP Tube Database |
12AX7: HTML page |
| National Valve Museum |
12AX7: html ECC83: html2 |
| oldradio.qrz.ru |
12AX7: MK buizen handboek ECC83: html page, MAZDA Valves & Picture Tubes Data |
| Penta Laboratories |
ECC83: Acrobat PDF |
| Frank Philipse |
12AX7: .gif file, 082/e/ECC83.pdf, 093/1/12AX7.pdf, 126/b/B339.pdf, 137/1/12AX7.pdf 20EZ7: 049/2/20EZ7.pdf ECC83: 010/e/ECC83.pdf, 030/e/ECC83.pdf |
| Triode Electronics |
12AX7: gif1, gif2, gif3, gif4, gif5, gif6 |
| TubeZone |
12AX7: pdf |
| Virtual Valve Museum |
ECC83: HTML page |
| WPS |
12AX7: html page |
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