6SA7

Compound (multi-section) — Octal

Tung-Sol

Known Equivalents & Substitutes

6SA7GT6SA7GTXCV1966VT150A

Similar Tubes (Not Drop-In Compatible)

Older pentagrid converter on Octal base with different grid structure

Miniature (B7G) pentagrid converter — electrically similar but different base, not pin-compatible

Datasheet notes ratings and characteristics somewhat similar — Loctal base

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)300V

Screen Voltage (max)Screen Voltage (max, grids 2 & 4)100V

Anode Dissipation (max)Anode Dissipation (max)1W

Screen Dissipation (max)Screen Dissipation (max, grids 2 & 4)1W

Notes

The 6SA7 has five grids: Grid 1 (oscillator), Grids 2 and 4 (screen, connected together), Grid 3 (signal input), and Grid 5 (suppressor, connected to cathode at socket).
Maximum ratings: Va=300V, Vg2/g4=300V (supply), Pa=1W, Pg2/g4=1W, Ik=14mA.
Conversion transconductance at Eg3=-2V: 450 umhos. Oscillator transconductance (grids 2 and 4 to plate): 4500 umhos.
Self-excited operation uses 20kΩ cathode resistor. Separate excitation also supported.

Pin Layout — Octal

1Shell (Metal type) / No Connection (GT)

2Heater

3Anode

4

References