- Country
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Manufacturing
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Function
- Ballast
- Barretter
- Beam power amplifier
- Diode
- Diode pentode
- Diode tetrode
- Diode triode
- Diode triode pentode
- Double diode
- Double diode pentode
- Double diode tetrode
- Double diode triode
- Double tetrode
- Double triode
- Double triode pentode
- Full-wave rectifier
- Half-wave rectifier
- Heptode
- Hexode
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- Nixie
- Pentode
- Photo cell tube
- Quadruple diode
- Relay
- Tetrode
- Thermal delay switch
- Thyratron
- Triode
- Triode heptode
- Triode hexode
- Triode pentode
- Triode tetrode
- Triode twin pentode
- Triple diode
- Triple diode triode
- Triple triode
- Tuning indicator
- Twin diode twin triode
- Twin pentode
- Voltage regulator
- Type
28D7/W
Rugged double beam power amplifier tubes manufactured in the United States by renowned Sylvania. These fine glass 8 pin loctal based tubes, manufactured for reliable service in aviation and mobile equipment subject to severe shock and vibration, come with black plates and chrome tops. With various makers markings, these tubes come in white or beige military boxes printed 28D7/W. Photo is typical of available stock.
Data sheet
- Base
- 8 pin Loctal
- Boite type
- 1/2
- Emplacement
- 21
- Quide
- 223
- Fonction
- Twin pentode
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