Alternatives & variations Download PDF datasheet

R18

Industrial miniature indirectly heated half-wave rectifier for demanding compact supplies. Rated for approximately 1.8 kV peak inverse voltage and 150 mA nominal output, with high peak cathode-current capability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: -
Nominal heater: 6.3 V / 1.1 A

Description

Industrial miniature indirectly heated half-wave rectifier with high peak cathode-current, inverse-voltage, and heater-cathode ratings.

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: -
Nominal heater voltage: 6.3 V
Nominal heater current: 1.1 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: 1800 V
Rectifier nominal output current: 150 mA
Rectifier peak forward current: 900 mA
Rectifier max heater-cathode voltage: 900 V

Published ratings and characteristics promoted semantically from the approved source; identical repeated sections compressed where applicable.

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

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak Anode Current
900 mA
Peak Inverse Voltage
1800 V
Peak Heater-Cathode Voltage
900 V
DC Output Current
150 mA

Characteristic

Commercial Equivalent
CV2235