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9005

Acorn UHF diode designed for detector, rectifier, and measuring service, with resonant operation extending to roughly 1.5 GHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 5BG
Socket code: ACORN5
Base pins: 5
Nominal heater: 3.6 V / 165 mA

Description

Acorn UHF diode for rectifier, detector, or measuring service; resonant frequency about 1500 MHz.

Socket description

Acorn 5-pin

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 5BG
Socket code: ACORN5
Base pins: 5
Nominal heater voltage: 3.6 V
Nominal heater current: 165 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

5BG - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1H1	—	H — Heater Preserve source label H1; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BG
PIN2K	A	K — Cathode Preserve source label K; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BG
PIN3P	A	P — Plate (Anode) Preserve source label P; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BG
PIN4H2	—	H — Heater Preserve source label H2; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BG
PIN5H2	—	H — Heater Preserve source label H2; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BG

Section ratings

1 physical section, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 1 mA

117-V RMS AC plate rating and 1-mA DC output rating retained as parameters.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

Heater/filament voltage
3.6 V
Published heater/filament rating
Heater/filament current
165 mA
Published heater/filament rating

Other

DC output current
1 mA
RectifierService
RMS supply voltage per plate
117 V
RectifierService

Data set 02

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Maximum RMS plate voltage
117 V
Detector
Maximum DC output current
1 mA
Detector

Data set 03

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

HeaterOrFilamentVoltage
3.6 V
HeaterOrFilamentCurrent
165 mA
MaximumOperatingFrequency
1500 MHz
Approximate/useful limit
Resonant Frequency
1500 MHz

Other

DCOutputCurrentMaximum
1 mA
Rectifier

Data set 04

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Heater voltage
3.6 V
Heater current
165 mA
AC plate voltage maximum RMS
117 V
DC output current maximum
1 mA

Capacitance

Plate-to-cathode capacitance
0.8 pF

Characteristic

Resonant frequency approximate
1800 MHz

Data set 05

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Heater voltage
3.6 V
Nominal
Heater current
165 mA
Nominal
AC plate voltage RMS
117 V
Rectifier; design-center maximum
DC output current
1 mA
Rectifier; design-center maximum

Capacitance

Plate-to-cathode capacitance
0.8 pF
No external shield
Plate-to-heater capacitance
0.2 pF
Approximate; no external shield
Heater-to-cathode capacitance
1.1 pF
Approximate; no external shield

Characteristic

Resonant frequency
150 MHz
Approximate