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UV199- First year: 1922
- Base: UV199 (Codex=Bo)
- Filament: Vf 3 Volts / If 0.
- Identical to: UV199 = C299 = SV-
- Tube type: Triode, vacuum U
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UV200- First year: 1920
- Base: UV-Base (4 Pins+Ba
- Filament: Vf 5 Volts / If 1
- Identical to: UV200 = C300 = C-3
- Tube type: Gas Triode Detec
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UV201- First year: 1920
- Base: UV-Base (4 Pins+Ba
- Filament: Vf 5 Volts / If
- Identical to: UV201 = C301 = 01
- Tube type: Triode, vacuum U
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UV201-A- First year: 1922
- Base: UV-Base (4 Pins+Ba
- Filament: Vf 5 Volts / If 0.
- Identical to: UV201A = C301A = 2
- Tube type: Triode, vacuum U
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UV202- First year: 1921
- Base: UV-Base (4 Pins+Ba
- Filament: Vf 7.5 Volts / I
- Identical to: UV202 = C302 = D
- Tube type: Transmitting Triod
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UX 201-A- First year: 1925
- Base: UX-Base (4 Pins (2
- Filament: Vf 5 Volts / If 0.
- Identical to: UX201A = GX201A =
- Tube type: Triode, vacuum U
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UY1- First year: 1940
- Base: Octal (Int.Octal,
- Filament: Vf 50 Volts / If:
- Tube type: Half-Wave Vacuum R
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UY11- First year: 1939
- Base: German Steel Y8A,
- Filament: Vf 50 Volts / If:
- Identical to: = UY11g
- Tube type: Half-Wave Vacuum R
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UY1N- First year: 1941
- Base: Octal (Int.Octal,
- Filament: Vf 50 Volts / If:
- Tube type: Half-Wave Vacuum R
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UY224- First year: 1929
- Base: UY-Base, 5 Pins (U
- Filament: Vf 2.5 Volts / If
- Identical to: UY224 = 24 = 124 =
- Tube type: Screen-grid Tetrod
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