|
B309Sensibly equivalent¶ to:See also:
|
|
|
The B309 is an RF double triode for television service and a special quality version was also made. (QA2406). The B309 was advertised as a new design in 1953.The valve is equivalent to the Mullard ECC81.The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 49 mm tall.References: Data-sheet & 1040. Type B309 was first introduced in 1953. See also 1953 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |  a(2) | g1(2) | k(2) | h | h | a(1) | g1(1) | k(1) | h(tap) |
|
|
Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vg | mAa | ra | gm | 
| 6.3 | 0.3 | 250 | -2.0 | 10.0 | 10000 | 5.5 |
|
Updated January 07, 2013.
|
|
