6H5

Electron-ray visual indicator for receiver tuning or electrical level indication, using a fluorescent display whose pattern changes with control voltage.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: IO
Base pins: -
Nominal heater: 6.3 V / 300 mA

Description

High-vacuum cathode-ray tuning indicator whose fluorescent shadow pattern varies with control-grid bias.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Max plate voltage: 250 V

Electrical section reconstructed from published ratings/characteristics; transconductance promoted in A/V.

Section 2

Tuning Indicator

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Physical section represented from published tube construction.

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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

“ ‘g Laximum Plate Supply Voltage
250 V
ClassA
liaximum Target Voltage
250 V
ClassA
liinimum Target Voltage
90 V
ClassA
Plate Supply Voltage
100 V
ClassA; Column1
Plate Supply Voltage
200 V
ClassA; Column2
Plate Supply Voltage
250 V
ClassA; Column3
Target Voltage
100 V
ClassA; Column1
Target Voltage
200 V
ClassA; Column2
Target Voltage
280 V
ClassA; Column3
Plate Resistor
0.5 ohm
ClassA; Column1
Plate Resistor
1 ohm
ClassA; Column2
Plate Resistor
1 ohm
ClassA; Column3
Target Current (approximate)
4.5
ClassA; Column1
Target Current (approximate)
4.5
ClassA; Column2
Target Current (approximate)
4.5
ClassA; Column3
Plate Current (zero blas)
0.19 mA
ClassA; Column1
Plate Current (zero blas)
0.19 mA
ClassA; Column2
Plate Current (zero blas)
0.24 mA
ClassA; Column3
Grid Bias (approximate)
-8 V
ClassA; Column1
Grid Bias (approximate)
-18.5 V
ClassA; Column2
Grid Bias (approximate)
22 V
ClassA; Column3

SECTION 2

Tuning Indicator

Characteristic

Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating

Data set 02

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 2

Tuning Indicator

Other

Plate Supply 100 200
250 V
Plate Supply 100 200 250 volts
Resistor o5 1.0
1 MΩ
Resistor o5 1.0 1.0 megohm
Target 100 200
250 V
Target 100 200 250 volts
Shadow lingle 0 0
0 V
Shadow lingle 0 0 0 volts