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Diode (NOT rectifier) ·Diode-Diode

UAA9

Low-resistance dual diode, explicitly co-designated with EAA91, designed for FM ratio detectors and related high-frequency detector circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 300 mA

Description

Low-resistance dual diode for FM ratio detectors and related detector circuits.

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
6.3 V
Nominal heater current
300 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

Diode

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
420 V
Rectifier nominal output current
9 mA
Rectifier peak forward current
54 mA

Representative section row for identical repeated sections.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Second physical diode section added in approved reconciliation.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    300 mA

    Nominal

  • Maximum Peak Inverse Voltage

    420 V

  • Rectified Output Current

    9 mA

  • PeakForwardCurrent

    54 mA