30C1

VHF triode-pentode frequency changer for series-heater AC/DC television equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: B9A
Socket code: B9A
Base pins: 9
Nominal heater: 9 V / 300 mA

Description

VHF triode-pentode frequency changer for AC/DC television equipment. The supplied English-language Mazda/Thorn-AEI datasheet was used for the technical and descriptive extraction.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: B9A
Socket code: B9A
Base pins: 9
Nominal heater voltage: 9 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

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0062 S
Max plate voltage: 250 V
Max screen voltage: 175 V
Max plate dissipation: 1.7 W
Max screen dissipation: 0.5 W
Max cathode current: 14 mA

Published ratings and characteristics promoted where clearly stated; identical repeated sections compressed when applicable.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.005 S
Amplification factor: 20
Max plate voltage: 250 V
Max plate dissipation: 1.5 W
Max cathode current: 14 mA

Published ratings and characteristics promoted where clearly stated; identical repeated sections compressed when applicable.

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

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 2

Triode

Characteristic

* Taken atVa =170: VgY =170: 1a =10mA: Vgt =
-2 V
CHARACTERISTIC CURVES
1 a