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6BY6 tube: datasheets and technical data
Explore available pinout, electrical data and related types for the 6BY6 vacuum tube.
The 6BY6 is a miniature dual-control heptode intended chiefly for television sync circuits. General Electric, RCA and Tung-Sol sheets describe it as a gated amplifier that can perform sync separation and clipping in the same stage. Grids 1 and 3 are independent and both have sharp-cutoff characteristics, so the circuit can apply two controls to the current in the same valve. Grids 2 and 4 are connected together as the screen, while grid 5 is tied to the cathode. The 6BY6 has a seven-pin miniature base and a 6.3 V, 0.3 A heater.
The manufacturers' tables distinguish class A amplifier operation from its specific use as a sync separator and clipper. For the former they give a characteristic operating point of 250 V on the plate, 100 V on the screen grids and −2.5 V on each control grid, with 6.5 mA of plate current. The transconductances to the plate differ: approximately 1,900 µS for grid 1 and 500 µS for grid 3. The stated conditions for a sync circuit are quite different, with 10 V on the plate and 25 V on the screen: figures from one application should not be transferred to another without considering the circuit.
The General Electric sheet places the 3BY6 alongside the 6BY6 and describes them as identical except for heater ratings: the 3BY6 is rated at 3.15 V and 0.6 A and is also intended for series heater strings. This comparison explains the relationship between the two designations, but the supply must be checked before substituting one type for the other.
Tube images
Pinout and connections
Base: B7G - Miniatur-7-Pin-Base , USA 1940 (7 pin)
| Pin | Function |
|---|---|
| 1 | g1 |
| 2 | k,g5 |
| 3 | h |
| 4 | h |
| 5 | a |
| 6 | g2,g4 |
| 7 | g3 |
Electrical data
Filament
- Filament voltage Vh
- 6.3 V
- Filament current Ih
- 0.3 A
Datasheet PDF
EL84 ECC83 12AX7 EL34 6L6GC 300B KT88 GZ34
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