EM2

Philips electron-ray tuning indicator providing fluorescent visual indication of receiver tuning and changing signal-derived control voltage.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 200 mA

Description

EM2 is listed in the supplied valve table as a electron-ray tuning indicator. Published operating and characteristic values were transcribed from its target row.

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: 200 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

Tuning Indicator

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published target-row operating and characteristic values reviewed.

Section 2

Triode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

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

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Other

Plate voltage
250 V
Published table operating point
Target supply voltage
250 V
TuningIndicator

Characteristic

Heater/filament voltage
6.3 V
Published heater/filament rating
Heater/filament current
200 mA
Published heater/filament rating
Grid voltage for 150 degree shadow
0 V
TuningIndicator
Grid voltage for zero degree shadow
6 V
TuningIndicator