Antique radios, Old Time Radios
6R4
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| Tube type: |
Triode, vacuum UHF |
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| Identical to |
6R4
= EC81
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| First Source
(s) |
15.Jul.1949 : Electron Tube Registration List 766
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| Base |
Noval, 9 pin miniature (USA pico-9) B9A
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| Filament |
Vf 6.3 Volts / If 0.175 Ampere / Indirect / Specified voltage AC/DC |
| Description |
UHF triode intended as oscillator up to 750MHz.
RMA registation code for Philips EC81.
Part of the Innoval family, early noval tubes with frit-seal base sealing to envelope, first introduced by Philips Australia.
Text in other
languages (may
differ)
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| Tube prices |
1 Tube prices (visible for members
only)
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6R4: Internet
Miguel Angel Trujillo-Rodriguez
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6R4: RTT Schwandt
Günther Stabe † 19.8.20
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