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| ECH81 Pinout |
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| ECH81 Substitutes |
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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. |
| ECH81 Ratings |
Vh
V |
Ih
A |
VaMax
V |
Vg2Max
V |
VhkMax
V |
PaMax
W |
Pg2Max
W |
IkMax
mA |
Cgk
pF |
Cak
pF |
Cga
pF |
Notes |
| 6.3 |
0.3 |
300 |
125 |
100 |
1.7 |
1.0 |
12.5 avg |
4.8 |
7.9 |
0.006 |
Heptode section |
| 6.3 |
0.3 |
250 |
|
|
0.8 |
|
6.5 avg |
2.6 |
2.1 |
1.0 |
Triode section |
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| ECH81 Application Data |
| Class |
Va
V |
Vg2
V |
Vg1
V |
Ia
mA |
Ig2
mA |
Ra
Ω |
S
mA/V |
Notes |
| Static |
100 |
|
-1.0 |
10.0 |
|
|
3.2 |
Triode section |
| Frequency changer |
100 |
|
|
4.5 |
|
|
|
Triode section |
| Static |
250 |
100 |
-2.0 |
6.5 |
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|
2.4 |
Heptode section |
| A |
250 |
100 |
-2.0 |
6.5 |
3.8 |
700,000 |
2.4 |
Heptode section |
| Frequency changer |
250 |
103 |
-2.0 |
3.25 |
6.7 |
1,000,000 |
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Heptode section |
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| ECH81 Data sheet links |
| Duncan''s Amp Pages |
6C12/ECH81: Acrobat PDF (10 pages) |
| The Valve Museum |
ECH81: html UCH81: html2 |
| oldradio.qrz.ru |
ECH81: MAZDA Valves & Picture Tubes Data, MK buizen handboek |
| Frank Philipse (Wildcat mirror - Jörg Jan Münter) |
6AJ8: 6AJ8.pdf (762509 bytes), 6AJ8.pdf (85372 bytes) ECH81: ECH81.pdf (108296 bytes) (fr), ECH81.pdf (188664 bytes) (de), ECH81.pdf (508079 bytes), ECH81.pdf (522127 bytes) (fr), ECH81.pdf (9041652 bytes) (cs), ECH81.pdf (99461 bytes) X719: X719.pdf (311300 bytes) UCH81: UCH81.pdf (101857 bytes), UCH81.pdf (133898 bytes) (fr), UCH81.pdf (1397950 bytes) (cs), UCH81.pdf (2103261 bytes), UCH81.pdf (425404 bytes) (fr) |
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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