1C3

Directly heated medium-mu triode for low-power Class A amplifier service in receiving and general small-signal electronic equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Description

Directly heated medium-mu triode for low-power Class-A amplifier service.

General specifications

Properties common to every published source and operating point.

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1P	A	P — Plate (Anode) EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5CF
PIN2IS	A	IS — Internal Screen EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5CF
PIN3H	—	H — Heater EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5CF
PIN4H	—	H — Heater EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5CF
PIN6G1	A	G1 — Control Grid EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5CF
PIN7K	A	K — Cathode EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5CF

1 physical section, each with unique specifications.

Section 1

X-ray radiationInterelectrode capacitances

Promoted from the printed condensed-manual maximum/characteristic columns; operating-point values are retained in TUBE_SECTION_PARAMETER.

Source-dependent data

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

Data set 01

Published operating points and test conditions from this source.

SECTION 1