6GW8 — Compound (multi-section), Noval | Tubeofile

6GW8

Compound (multi-section) — Noval

Known Equivalents & Substitutes

ECL86CV8297

Similar Tubes (Not Drop-In Compatible)

6F5P

Soviet triode-pentode (6Ф5П) listed as Russian substitute for ECL86 — similar application but verify pin compatibility and characteristics

Series-heater equivalent (14.5V/0.3A) — not compatible with 6.3V parallel heater circuits

Electrical Specifications

Section 1 — Triode

Absolute Maximum

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

Anode Dissipation (max)Anode Dissipation (max)0.5W

Cathode Current (max)Cathode Current (max)4mA

Heater-to-Cathode Voltage (max)Heater-Cathode Voltage (max)100V

Max Grid ResistorMax Grid Resistor

Section 2 — Pentode

Absolute Maximum

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

Screen Voltage (max)Screen Voltage (max)300V

Anode Dissipation (max)Anode Dissipation (max)9W

Screen Dissipation (max)Screen Dissipation (max)1.8W

Cathode Current (max)Cathode Current (max)

Section 3 — Triode Strapped

Absolute Maximum

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

Anode Dissipation (max)Anode Dissipation (max)9W

Cathode Current (max)Cathode Current (max)55mA

Typical Operating

Anode ResistanceAnode Resistance2,500Ω

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.66A

Notes

Triode section Rg1 max is 1 MOhm; pentode section Rg1 max is 0.5 MOhm (fixed bias) or 1 MOhm (cathode bias, typical).
PCL86 (14GW8) is the series-heater equivalent (14.5V/0.3A heater) — not pin-compatible without heater circuit changes.
Inter-electrode capacitance between triode grid and pentode plate can be reduced below 0.002 pF using a shielding ring (22.5 mm diameter, 15 mm height).
Pentode mu of 21 is measured from grid No.1 to grid No.2, not grid-to-anode.

Pin Layout — Noval

1Triode Grid

2Triode Cathode

3Pentode Screen Grid (G2)

Socket-Compatible Tubes ⚠ Not electrically compatible

References