Tube-number record

A28-13W

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BrandTELEFUNKEN

ClassTelevision Picture Tube

BaseMiniature 7-pin (B7G)

Construction

Primary TypeDisplay / CRT

EnvelopeGlass

Base MaterialGlass

Sections1

Filament / Heater

Heater Notes0.75 W filament power, indirectly heated

Absolute Maximum Ratings

Plate Voltage12000 V

Grid 2 Voltage550 V

Grid 1 Voltage-150 V

H-C Voltage200 V

Audio Performance

Key Features

Rectangular faceplate
90 degree magnetic deflection
Electrostatic focusing
Metal-backed screen
Grey glass
20 mm neck diameter
No ion trap required
Metal shielding included

Typical Operation

Mode	Plate V	Gm (µmhos)	Rp (Ω)	µ	Plate mA
Typical TV Operation	10000 V	—	—	—	—

Application Notes

The tube requires a black coating thickness sufficient to meet the 100 Ohm resistance requirement. Focusing voltage is typically -50 to +250 V at an anode current of 0.25 mA.

Datasheets

Datasheet: A28-13W.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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