The 6F7B is a variant of the 6F7 triode pentode mixer. The triode oscillator has to generate 7.0 Volts pk-pk to drive the mixer section.Both sections share a common cathode. The screened upper cylinder is the pentode mixer. The small bright tab below is the triode anode. Under a glass the triode grid can be seen. The cathode tube is oxide coated only along the length of each anode, above the triode anode the tube is un-coated.The classic envelope is 38 mm in diameter, and excluding the UX7 base pins is 103 mm tall.Reference: 1043. Type 6F7B was first introduced in 1940. See also 1940 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | tc | h | a | g2 | a(t) | g1(t) | k | h | g1 |
|
|
Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm |
| 6.3 | 0.3 | 250 | 100 | -3.0 | 2.8 | 0.6 | 2M | 0.3 |
|
Absolute Maximum Operating Conditions¶
| Va | Vg | mAa |
| 100 | - | 2.4 |
|
Updated June 22, 2013.
|
|