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Voltage - Dual Triode (similar) ·Triode-Triode

ECC807

Brimar ECC807 high-gain low-hum dual triode designed for low-level audio preamplifier stages, with 6.3 V, 0.3 A heater.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
B9A
Socket code
-
Base pins
9
Nominal heater
6.3 V / 300 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
B9A
Socket code
-
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

B9A - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0024 S
Amplification factor
150
Max plate voltage
300 V
Max plate dissipation
1 W
Max cathode current
8 mA

Brimar 1964 each section: max anode voltage 300 V (550 V at zero current), max heater-cathode 150 V, max negative grid 50 V; typical Va 250 V, Vg -1.5 V, Ia 1.3 mA, gm 2.4 mA/V, mu 150. Input 2.0 pF, output 1.35 pF, anode-grid 2.3 pF.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0024 S
Amplification factor
150
Max plate voltage
300 V
Max plate dissipation
1 W
Max cathode current
8 mA

Brimar 1964 each section: max anode voltage 300 V (550 V at zero current), max heater-cathode 150 V, max negative grid 50 V; typical Va 250 V, Vg -1.5 V, Ia 1.3 mA, gm 2.4 mA/V, mu 150. Input 2.0 pF, output 1.35 pF, anode-grid 2.3 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

9999 Mixed 2000

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    250 V

    Typical anode voltage; Brimar ECC807

  • Control-grid voltage

    -1.5 V

    Typical grid voltage; Brimar ECC807

  • Plate current

    1.3 mA

    Typical anode current; Brimar ECC807

Characteristic

  • Transconductance

    2400 µS

    Mutual conductance; Brimar ECC807

SECTION 2

Triode

Other

  • Plate voltage

    250 V

    Typical anode voltage; Brimar ECC807

  • Control-grid voltage

    -1.5 V

    Typical grid voltage; Brimar ECC807

  • Plate current

    1.3 mA

    Typical anode current; Brimar ECC807

Characteristic

  • Transconductance

    2400 µS

    Mutual conductance; Brimar ECC807