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Voltage - Triode (single high frequency) ·Triode

EC866

EC866 miniature low-noise high-frequency triode for VHF amplification, oscillators and mixers up to 800 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
9
Nominal heater
6.3 V / 165 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
165 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.014 S
Amplification factor
70
Max plate voltage
220 V
Max plate dissipation
2 W
Max grid dissipation
0.02 W
Max cathode current
18 mA

EC866 high-frequency triode, 1981 Russian Tubes pp.409–410. Va supply 185 V, grid supply +8 V, Rk 800 Ω, Ia 12±0.8 mA, gm 14 (+3/-2.5) mA/V, mu 70. Max Va 220 V, 400 V switch-on; grid negative 50 V, heater-cathode 100 V, max grid resistance 1 MΩ. Unshielded capacitances: grid-anode 2 pF, cathode-anode 0.2 pF, cathode-grid 3.6 pF, grid-heater <0.3 pF, cathode/grid tied heater 6.6 pF, anode/grid tied heater 2.1 pF, grid/cathode tied heater 3.9 pF, anode/cathode tied heater 0.3 pF. External-shield measurements: grid/shield to cathode/heater 4.2 pF, anode to grid/shield 3.1 pF, anode to cathode/heater 0.25 pF.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1981 Russian Tubes Katsnelson and Larionov

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    185 V

    EC866, Katsnelson/Larionov 1981 pp.409–410; Typical anode supply voltage

  • Plate current

    12 mA

    EC866, Katsnelson/Larionov 1981 pp.409–410; Typical anode current ±0.8 mA

Characteristic

  • Transconductance

    14000 µS

    EC866, Katsnelson/Larionov 1981 pp.409–410; Typical transconductance +3000/-2500 µS