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Voltage - Triode (single) ·Triode

955

Acorn medium-mu triode for AF/RF amplification and oscillator service through approximately 600 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 5BC
Socket code: ACORN5
Base pins: 5
Nominal heater: 6.3 V / 150 mA

Description

Acorn medium-mu triode for AF and RF amplifier or oscillator service through 600 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: 5BC
Socket code: ACORN5
Base pins: 5
Nominal heater voltage: 6.3 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

5BC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1H	—	H — Heater EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BC
PIN2P	A	P — Plate (Anode) EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BC
PIN3G1	A	G1 — Control Grid EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BC
PIN4H	—	H — Heater EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BC
PIN5K	A	K — Cathode EIA chart transcription; manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 5BC

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 11400 Ω
Transconductance: 0.0022 S
Amplification factor: 25
Max plate voltage: 250 V
Max plate dissipation: 1.6 W

First published Class-A operating point used for promoted characteristics.

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

Triode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
150 mA
Nominal
Maximum Plate Voltage
180 V
RFPowerOutput
0.5 W
ClassC Telegraphy

Characteristic

Transconductance
2000 µS
Typical
Amplification Factor
25
Typical
Plate Resistance
12500 ohm
Typical

Data set 02

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
150 mA

Other

MaximumOperatingFrequency
600 MHz
Reduced ratings may apply at upper frequencies
Plate Dissipation
1.6 W
ClassA

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum plate voltage
250 V
Published handbook rating
Plate voltage
250 V
ClassA
Control-grid bias
7 V
ClassA
Plate current
6.3 mA
ClassA

Characteristic

Plate resistance
11400 ohm
Published handbook characteristic
Transconductance
2200 µS
Published handbook characteristic
Amplification factor
25
Published handbook characteristic
Heater/filament voltage
6.3 V
Published heater/filament rating
Heater/filament current
150 mA
Published heater/filament rating

Data set 04

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
250 V
UHFOscillator
Control-grid voltage
-7 V
UHFOscillator
Plate current
6.3 mA
UHFOscillator

Characteristic

Amplification factor
25
Section1
Transconductance
2200 µS
Section1

Data set 05

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
150 mA
MaximumOperatingFrequency
600 MHz
Approximate/useful limit
Application
RF amplifier and oscillator

Data set 06

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
6.3 V
Heater current
150 mA
Plate current
2.5 mA
ClassA;Vp=90V

Capacitance

Grid-to-plate capacitance
1.4 pF
Grid-to-cathode capacitance
1 pF
Plate-to-cathode capacitance
0.6 pF

Data set 07

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
6.3 V
Nominal
Heater current
150 mA
Nominal
Maximum DC plate voltage
250 V
AF amplifier
Maximum plate dissipation
1.6 W
AF amplifier
Maximum DC heater-cathode potential
80 V
AF amplifier
DC grid voltage
-2.5 V
ClassA; DC plate voltage 90 V
Amplification factor
25
ClassA; DC plate voltage 90 V
Plate resistance
14700 ohm
ClassA; DC plate voltage 90 V
Transconductance
1700 uS
ClassA; DC plate voltage 90 V
DC plate current
2.5 mA
ClassA; DC plate voltage 90 V
DC grid voltage
-3.75 V
ClassA; DC plate voltage 135 V
Amplification factor
25
ClassA; DC plate voltage 135 V
Plate resistance
13200 ohm
ClassA; DC plate voltage 135 V
Transconductance
1900 uS
ClassA; DC plate voltage 135 V
DC plate current
3.5 mA
ClassA; DC plate voltage 135 V
DC grid voltage
-5 V
ClassA; DC plate voltage 180 V
Amplification factor
25
ClassA; DC plate voltage 180 V
Plate resistance
12500 ohm
ClassA; DC plate voltage 180 V
Transconductance
2000 uS
ClassA; DC plate voltage 180 V
DC plate current
4.5 mA
ClassA; DC plate voltage 180 V
DC grid voltage
-7 V
ClassA; DC plate voltage 250 V
Amplification factor
25
ClassA; DC plate voltage 250 V
Plate resistance
11400 ohm
ClassA; DC plate voltage 250 V
Transconductance
2200 uS
ClassA; DC plate voltage 250 V
DC plate current
6.3 mA
ClassA; DC plate voltage 250 V
Load resistance
20000 ohm
ClassA; DC plate voltage 180 V
Second harmonic distortion
5 %
ClassA; DC plate voltage 180 V
Power output
135 mW
ClassA; DC plate voltage 180 V
Plate-supply voltage
180 V
ResistanceCoupling
DC grid voltage
-3.5 V
ResistanceCoupling
Load resistance
250000 ohm
ResistanceCoupling
Plate current
0.42 mA
ResistanceCoupling
Second harmonic distortion
5 %
ResistanceCoupling
Voltage output
45 V RMS
ResistanceCoupling
Voltage gain
20
ResistanceCoupling
Maximum DC plate voltage
180 V
ClassC; RF power amplifier/oscillator
Maximum DC plate current
8 mA
ClassC; RF power amplifier/oscillator
Maximum DC grid current
2 mA
ClassC; RF power amplifier/oscillator
Maximum DC heater-cathode potential
80 V
ClassC; RF power amplifier/oscillator
DC plate voltage
180 V
ClassC; RF power amplifier/oscillator
DC grid voltage
-35 V
ClassC; RF power amplifier/oscillator
DC plate current
7 mA
ClassC; RF power amplifier/oscillator
DC grid current
1.5 mA
ClassC; RF power amplifier/oscillator
Power output
0.5 W
ClassC; RF power amplifier/oscillator
Plate-supply voltage
180 V
Detector; Biased
Grid voltage
-7 V
Detector; Biased
Load resistance
0.25 Mohm
Detector; Biased
Plate current
0.2 mA
Detector; Biased; approximate
Cathode resistor
50000 ohm
Detector; Biased
Plate-supply voltage
45 V
Detector; GridLeak
Grid leak
1 to 5 Mohm
Detector; GridLeak
Grid condenser
0.00025 uF
Detector; GridLeak

Capacitance

Grid-to-plate capacitance
1.4 pF
Grid-to-cathode capacitance
1 pF
Plate-to-cathode capacitance
0.6 pF