UCH4

Series-heater triode-hexode frequency changer for superheterodyne receivers. The triode supplies local oscillation while the high-resistance hexode mixes it with the selected RF signal.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: IO
Base pins: 8
Nominal heater: 20 V / 100 mA

Description

Variable-mu series-heater triode-heptode for frequency conversion and RF, IF, or audio amplifier service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: 8
Nominal heater voltage: 20 V
Nominal heater current: 100 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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Max plate voltage: 250 V

Published ratings and characteristics promoted semantically from the approved source; identical repeated sections compressed where applicable.

Section 2

Hexode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω
Max plate voltage: 250 V
Max screen voltage: 250 V

Published ratings and characteristics promoted semantically from the approved source; identical repeated sections compressed where 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.

No source-specific operating conditions are recorded.