EM3

Philips fluorescent tuning indicator for visual receiver tuning or signal-level indication.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

EM3 is a Philips fluorescent tuning-indicator tube with an indirectly heated cathode, intended to provide a visual indication of receiver tuning or signal level.

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

Max plate voltage: 275 V

Primary functional section; see parameter rows for published operating conditions, ratings, and capacitances.

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

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Tuning Indicator

Characteristic

Published electrical datum
6.3 V
Chauffage id., CC ou CA, alimentation Vf 6,3 V
Published electrical datum
200 mA
en parallele ou en eerie. If 0,200 A
Published electrical datum
0 MQ
Ra 1 0 MQ 1,0 MB
Published electrical datum
0 V
Is (Vg = 0 V) 0,~5 mA 0 3 mA
Published electrical datum
0 V
Ia (Vg = 0 V) 175 ipA 2~20 µA
Published electrical datum
0 V
Vg (G = 9ob1) - 0 V
Published electrical datum
0 V
Vg (G = i20 )1 0 V -
Published electrical datum
-18 V
Vg (6 = 900)1) -18 V -21 V

Other

Published electrical datum
550 V
Van max. 550 V
Published electrical datum
275 V
Va max. 275 V
Published electrical datum
550 V
Vso max. 550 V
Published electrical datum
275 V
Vs max. 275 V
Published electrical datum
-1.3 V
Vg (Ig = +0,3 VA) max. -1,3 V
Heater voltage
6.3 V
Nominal heater rating
Heater current
200 mA
Nominal heater rating