E80CC — Small Signal Triode, Noval | Tubeofile

E80CC

Small Signal Triode — Noval

Philips

Known Equivalents & Substitutes

6085CV5989

Similar Tubes (Not Drop-In Compatible)

Soviet Noval double triode listed as Russian substitute — different pinout (pin 9 is not shield) and different characteristics (µ=35 vs µ=27)

6N3P

Soviet Noval double triode listed as Russian substitute — different heater current and characteristics, not a direct drop-in

Electrical Specifications

Absolute Maximum

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

Anode Dissipation (max)Anode Dissipation (max, per section)2W

Cathode Current (max)Cathode Current (max, per section)12mA

Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max)120V

Max Grid ResistorMax Grid Resistor

Notes

Pin 9 is a heater shield (internal screen), NOT a heater center-tap. Circuits relying on the center-tap of ECC82/ECC83 (pin 9) for hum reduction need modification when using E80CC.
Heater current is 0.6 A at 6.3 V — double that of ECC82/ECC83 (0.3 A). The heater supply must accommodate the extra current before substituting.
Compared to ECC82 (12AU7): higher μ (27 vs 17), higher gm (2.7 vs 2.2 mA/V), higher ra (10 vs 7.7 kΩ), lower Pa_max (2.0 vs 2.75 W). Signal pins are compatible but not a drop-in replacement due to heater differences.
Compared to ECC83 (12AX7): much lower μ (27 vs 100) but higher gm (2.7 vs 1.6 mA/V) and much lower ra (10 vs 62.5 kΩ). Better current drive capability, lower gain. Signal pins compatible but heater pin 9 and current differ.
Frame grid construction gives tighter tolerances, lower noise (noise factor 4.6 dB), and better section matching than wound-grid consumer types (ECC82/83).
Parallel heater: 6.3 V / 0.6 A. Series heater: 12.6 V / 0.3 A. No center-tap available.
Vibration proof: 2.5 g at 50 Hz for 96 hours; impact acceleration approx. 300 g.

Pin Layout — Noval

1Anode (triode 1)

2Grid (triode 1)

3Cathode (triode 1)

Socket-Compatible Tubes ⚠ Not electrically compatible

References