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Voltage Pentode or Tetrode (under 100V) ·Pentode

EM10

Extremely low-power electrometer pentode designed for output stages of sensitive electrometer amplifiers and minute-signal measurement circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
0.7 V / 16.5 mA

Description

Electrometer pentode for output stages of electrometer amplifiers.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
0.7 V
Nominal heater current
16.5 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

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Max plate voltage
10 V
Max screen voltage
12 V

Promoted ratings and characteristics are taken from the printed target-tube entry in the approved PDF.

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

1981 Russian Tubes Katsnelson and Larionov

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater voltage

    0.7 V

    Published nominal/basic-parameter heater condition.

  • Heater current

    16.5 mA

    Published heater current.

  • Plate current

    0.008 mA

    Published basic-parameter operating point.

  • Grid current

    0.000009 mA

    Published in the filename-designated tube entry.

  • Anode-circuit resistance

    10 MΩ

    Published in the filename-designated tube entry.

  • Service life

    2000 h

    Published in the filename-designated tube entry.

Other

  • Maximum plate voltage

    10 V

    Published limiting operating value.

  • Maximum screen voltage

    12 V

    Published limiting operating value.