13D9

Brimar 13D9 B9A dual triode with two similar sections, 6.3 V/0.3 A parallel or 12.6 V/0.15 A series 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: 6.3 V
Parallel heater current: 300 mA
Series capable: Yes

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

Plate resistance: 8900 Ω
Transconductance: 0.0057 S
Amplification factor: 50
Max plate voltage: 300 V
Max plate dissipation: 2.5 W
Max cathode current: 20 mA

Brimar Aug 1965: zero-current anode voltage max 550 V; typical Va 200 V, Vg 0 V, cathode resistor 200 ohms, Ia 10 mA; input 2.3 pF, output 0.5 pF, anode-grid 1.6 pF; anode-to-anode <0.33 pF. Heater-cathode maximum OCR uncertain (~90 V).

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 8900 Ω
Transconductance: 0.0057 S
Amplification factor: 50
Max plate voltage: 300 V
Max plate dissipation: 2.5 W
Max cathode current: 20 mA

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
200 V
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series
Control-grid voltage
0 V
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series
Plate current
10 mA
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series

Characteristic

Plate resistance
8900 Ω
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series
Transconductance
5700 µS
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series
Plate Resistance
8900 Ω
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series

SECTION 2

Triode

Other

Plate voltage
200 V
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series
Control-grid voltage
0 V
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series
Plate current
10 mA
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series

Characteristic

Plate resistance
8900 Ω
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series
Transconductance
5700 µS
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series
Plate Resistance
8900 Ω
Brimar 13D9; Va=200 V, Vg=0 V, Rk=200 Ω, heater 12.6 V series