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217A

Directly heated half-wave high-vacuum rectifier for high-voltage transmitter and industrial supplies. Its heavy ten-volt filament supports useful current at several kilovolts.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: J4
Base pins: -
Nominal heater: 10 V / 5.25 A

Description

Directly heated half-wave high-vacuum rectifier for high-voltage power supplies.

Socket description

Jumbo 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: J4
Base pins: -
Nominal heater voltage: 10 V
Nominal heater current: 5.25 A
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

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 5500 V
Rectifier nominal output current: 200 mA

Published ratings and characteristics from source sheet.

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 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak Inverse Voltage _ 5500 max
7500 V
Peak Inverse Voltage _ 5500 max. 7500 max. Volts
Peak Plate Current_ 0.6 max
600 mA
Peak Plate Current_ 0.6 max. 0.6 max. Ampere
Average Plate Current .. 0.2 max
150 mA
Average Plate Current .. 0.2 max. 0.15 max. Ampere