6F14

Mazda 6F14 high-slope screened television pentode rated for broadband signal amplification, using a 6.3 V 0.35 A heater and eight-contact B8A-style base.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: 8
Nominal heater: 6.3 V / 350 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 350 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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 125000 Ω
Transconductance: 0.0106 S
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 4 W
Max screen dissipation: 1 W

Mazda 6F14 screened television pentode, eight-contact B8A-style base, indirectly heated 6.3 V 0.35 A. Tentative manufacturer ratings: plate max 250 V, screen max 250 V, plate dissipation 4 W and screen dissipation 1 W. Nominal at Va=Vg2=140 V and control grid -1.26 V: gm 10.6 mA/V (0.0106 S), plate resistance 0.125 MΩ (125 kΩ), inner g1-to-g2 amplification factor 33. Plate-to-earth ~3.8 pF, grid-to-earth ~9.3 pF and grid-plate ~0.02 pF with fixture-balanced measurements; flag true. Manufacturer says no internal cylindrical shield surrounding the electrode assembly.

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

1960 Mazda

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate Voltage
140 V
Screen Voltage
140 V
Grid Voltage
-1.26 V
Plate Current
15 mA
Screen Current
3 mA