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RES374- First year: 1931
- Base: Europe 5-Pin (O5A,
- Filament: Vf 4 Volts / If 0.
- Identical to: RES374 = C443N = P
- Tube type: Vacuum Pentode P
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RES964- First year: 1933
- Base: Europe 5-Pin (O5A,
- Filament: Vf 4 Volts / If: 1
- Identical to: RES964 = E443H = L
- Tube type: Vacuum Pentode
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RG12D2- Base: Side contact S8B (
- Filament: Vf 12.6 Volts / If
- Identical to: RG12D2
- Tube type: Double Diode Det
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RG12D3- Base: OTHER TUBEBASE i
- Filament: Vf 12.6 Volts / If
- Identical to: RG12D3
- Tube type: Double Diode Det
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RGN1064- First year: 1932
- Base: Europe 4-Pin (A, 4
- Filament: Vf 4 Volts / If:
- Identical to: RGN1064 = 1805
- Tube type: Full-Wave Vacuum R
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RGN2004- First year: 1928
- Base: Europe 4-Pin (A, 4
- Filament: Vf 4 Volts / If: 2
- Identical to: = 1561 = G2004 = 4
- Tube type: Full-Wave Vacuum R
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RGN354- First year: 1930
- Base: Europe 3-Pin (B3,
- Filament: Vf 4 Volts / If: 0
- Identical to: = G354 = EG200 = K
- Tube type: Half-Wave Vacuum R
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RL12P35- First year: 1936
- Base: OTHER TUBEBASE in
- Filament: Vf 12.6 Volts / If
- Identical to: RL12P35 = RS287 =
- Tube type: Transmitting Tube,
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RS 282- First year: 1934
- Base: OTHER TUBEBASE in
- Filament: Vf 8 Volts / If
- Identical to: RS282
- Tube type: Transmitting Triod
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RS291- First year: 1936
- Base: SPECIAL TUBEBASE i
- Filament: Vf 8 Volts / If 1.
- Identical to: RS291
- Tube type: Transmitting Tetro
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