6CS6

Hexode — B7G

RCA

Known Equivalents & Substitutes

EH90

Similar Tubes (Not Drop-In Compatible)

Similar heptode on B7G base but designed as pentagrid converter

Similar dual-control heptode on B7G base — same gated amplifier application, different operating points

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Max Plate Voltage300V

Screen Voltage (max)Max Screen Voltage100V

Anode Dissipation (max)Max Plate Dissipation1W

Typical Operating

Anode Voltage (typical)Plate Voltage100V

Screen Voltage (typical)Screen Voltage30V

Grid 1 Bias VoltageGrid Voltage-1V

Anode CurrentPlate Current1mA

Anode ResistancePlate Resistance

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.3A

Notes

GE Essential Characteristics: Dual-Control Heptode, B7G (7CH) base. Va=100V, Vg2=30V, Vg=-1V, Ia=1mA, gm=1100 umhos, Rp=1MΩ, Pa_max=1W, Va_max=300V, Vg2_max=100V.
Philips interchange confirms 6CS6=EH90.
Sams lists 6BY6 as substitute — similar function but higher Pa_max on the 6BY6.
Muiderkring Handbook page 158 lists this type.

Pin Layout — B7G

1Signal Grid (g1)

2Cathode,Suppressor Grid (g5)

3Heater

4

Socket-Compatible Tubes ⚠ Not electrically compatible

References