ECL82

Triode-Pentode — Noval

Philips

Known Equivalents & Substitutes

6BM8CV5215

Similar Tubes (Not Drop-In Compatible)

ECL85

Triode-pentode compound on Noval base but designed for frame output, not audio — different characteristics

ECL86

Similar triode-pentode compound on Noval base with higher output power (4W vs 3.4W) — different operating points, not pin-compatible

Electrical Specifications

Section 1 — Triode

Absolute Maximum

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

Anode Dissipation (max)Anode Dissipation (max)1.5W

Typical Operating

Anode Voltage (typical)Anode Voltage (typical)200V

Grid 1 Bias VoltageGrid Voltage-3V

Anode CurrentAnode Current10mA

Anode ResistanceAnode Resistance14,500Ω

TransconductanceTransconductance

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)1.7W

Typical Operating

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.66A

Notes

The triode section: mu=70, Rp=14.5kΩ, Gm=4.8 mA/V at Va=200V, Vg=-3V. Plate dissipation max 1.5W.
The pentode section: at Va=170V, Vg2=170V, Vg1=-7.3V: Ia=34mA, Ig2=4.5mA, Rp=40kΩ, Gm=10.2 mA/V. Output power 3.4W at 5% THD with 5kΩ load. Plate dissipation max 9W, screen dissipation max 1.7W.
The 6BM8 is the American designation for the same tube with identical pinout and characteristics.
Common in European single-ended amplifiers where a single ECL82 provides both driver and output stages. Two ECL82s can be used in push-pull for approximately 8W output.

Pin Layout — Noval

1Triode Plate

2Triode Grid

3Triode Cathode

References