UA55

Tungsram all-stage twin beam tetrode whose sections can serve RF, IF, mixer, detector, or power-amplifier functions, making it an unusually multifunctional receiving valve.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Tungsram all-stage valve comprising two symmetrically arranged beam tetrodes; the sections can be used for RF, IF, mixer, detector or power-amplifier functions.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: -
Nominal heater current: -
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

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 2500 Ω
Transconductance: 0.007 S
Max plate dissipation: 3.5 W

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

Section 2

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 2500 Ω
Transconductance: 0.007 S
Max plate dissipation: 3.5 W

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

195X Tunsgram

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

Transconductance
7000 µS
Published operating characteristic

Other

Maximum plate dissipation
3.5 W
Published maximum rating