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Voltage Radio Detector Converter ·Pentode

SP210

Directly heated screen-grid high-frequency pentode for battery receivers, usable as either an RF amplifier or detector. Its low-voltage filament provides useful receiver gain while preserving reasonable battery economy.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
7
Nominal heater
2 V / 100 mA

Description

Screen-grid high-frequency pentode for battery-operated receivers, suitable as an H.F. amplifier or detector.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
7
Nominal heater voltage
2 V
Nominal heater current
100 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
Transconductance
0.0017 S
Max plate voltage
150 V
Max screen voltage
150 V

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

1960 Mazda

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Anode-earth capacitance

    11 pF

  • Grid-earth capacitance

    10 pF

  • Anode-grid capacitance

    0.005 pF