| skos:altLabel | - valve
- computers
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- valves
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- tubes
- diode
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- (vacuum tubes)
- 12SK7
- 8-tube
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- Tube Power Amplifiers
- Vacuum diode
- Vacuum tube or \"valve\"
- Vacuum tube reliability
- Vacuum tube#AC power
- Vacuum tube#Battery valve
- Vacuum tube#Indirectly heated cathodes
- Vacuum tube#Transmitting tubes
- Vacuum tubes using field electron emitters
- Vacuum_tube
- Vacuum_tube#Diodes
- beam power tube
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- grid current
- heater filament
- incandescent anodes
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- radio valve
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- thermionic valves (vacuum tubes)
- tube (valve)
- tube or valve
- tube transmitter
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- tubes and bulbs
- tubes/valves
- vacuum (electron) tubes
- vacuum power tube
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- vacuum tubes (valves)
- vacuum-tube
- valve construction
- valve-based
- valves (tubes)
- valves (vacuum tubes)
- Vacuum tube#Vacuum tubes using field electron emitters
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