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27481 |
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| An 8-pin (international octal) medium mu twin triode with separate indirectly heated cathodes. Designed in the 1930s, it is a pre-cursor to the B9A ECC series. Widely used for input amplification and driver stages in older audio amplifiers, some designers still prefer these valves for the same applications in today's designs. |
| Characteristics |
(typical operating conditions, |
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7.5W (both anodes combined) |
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