EL82 — Power Pentode, Noval | Tubeofile

EL82

Power Pentode — Noval

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Philips

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Known Equivalents & Substitutes

6DY56П18П6PY5

Similar Tubes (Not Drop-In Compatible)

PL82

Series-heater equivalent (45V/0.1A) — not compatible with 6.3V parallel heater circuits

Electrical Specifications

Section 1 — Pentode

Absolute Maximum

Anode Voltage (max)Anode Voltage (max, operating)250V

Screen Voltage (max)Screen Voltage (max, operating)250V

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

Screen Dissipation (max)Screen Dissipation (max)2.5W

Cathode Current (max)Cathode Current (max)75mA

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

Max Grid ResistorGrid 1 Resistance (max, auto bias)1MΩ

Max Grid ResistorGrid 1 Resistance (max, fixed bias)0.4MΩ

Typical Operating

Anode Voltage (typical)Anode Voltage170V

Screen Voltage (typical)Screen Voltage170V

Grid 1 Bias VoltageGrid Bias-10.4V

Anode CurrentAnode Current53mA

Screen CurrentScreen Current

Output

Output PowerOutput Power (Class A, single-ended, d=10%)4W

Load ImpedanceAnode Load Resistance3,000Ω

Capacitances

Grid-to-Plate CapacitanceAnode-to-Grid Capacitance (transfer)<1pF

Input CapacitanceInput Capacitance11pF

Output CapacitanceOutput Capacitance5.9pF

other

Amplification Factor (g2/g1)Amplification Factor (g2/g1)10

Section 2 — Triode Strapped

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)250V

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

Cathode Current (max)Cathode Current (max)75mA

Typical Operating

Anode ResistanceAnode Resistance1,000Ω

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.8A

Notes

Pins 3 and 9 are both control grid (g1) terminals — dual grid connections for suppression of HF parasitic oscillations, common in TV output pentodes.
PL82 is electrically identical with a series heater (45V/0.1A) instead of parallel (6.3V/0.8A); same electrode characteristics but not a pin-compatible substitute.
D=10% is the standard European rating condition used to specify output power; not a typical audio operating point.
Triode-strapped data sourced from Tom Schlangen, 'Overview of pentodes / BPTs strapped as triodes' (September 2009), not from the manufacturer datasheet. Measured plate curves available at http://www.tubes.mynetcologne.de/roehren/daten/el82pentode_as_triode.pdf

Pin Layout — Noval

1No Connection (internal screen)

2Suppressor Grid (internally connected to cathode)

References