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OC2

Cold-cathode 75 V regulator for approximately 5–30 mA operation, with starting voltage notably affected by ambient illumination.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 5B0
Socket code: B7G
Base pins: 7
Nominal heater: -

Description

RCA OC2 is a cold-cathode glow-discharge voltage-regulator tube for maintaining a relatively constant DC output voltage despite load and supply variations. Its nominal regulated region is centered near 75 V.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 5B0
Socket code: B7G
Base pins: 7
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

5B0 - 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

Voltage Regulator

X-ray radiationInterelectrode capacitances

Regulator voltage: 75 V
Regulator minimum current: 5 mA
Regulator maximum current: 30 mA
Regulator starting voltage: 145 V
Regulator maintaining voltage: 75 V

Published ratings and characteristics promoted from approved datasheet.

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

1971 RCA HB3 Binder 2 of 7

Published operating points and test conditions from this source.

SECTION 1

Voltage Regulator

Other

Average starting current
75 mA
DC cathode current
5 mA to 30 mA
Ambient temperature range
-55 to +90 C
Maximum shunt capacitance
0.1 uF
Anode breakdown voltage in total darkness
145 V

Characteristic

Anode breakdown / starting voltage
145 V
Anode voltage drop
68 to 83 V
Regulation over specified cathode-current range
- to 4.5 V
Anode breakdown voltage under normal ambient light
- to 115 V