![](../../../Pictures/27/4/79UG39.JPG) 27479 |
Click on the above image for a full view ... |
|
An 8-pin (international octal) high mu twin triode with separate indirectly heated cathodes. Designed in the 1930s, as an audio frequency voltage amplifier, it is a pre-cursor to the B9A ECC series. It was widely used for input amplification in older audio amplifiers. |
Characteristics (typical operating conditions, |
|