Antique radios, Old Time Radios
RK21
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Country:
United States of America (USA)
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| Identical to |
RK21
= 38266A
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| Similar
Tubes |
Normally replaceable-slightly different:
836
; CV636
; SS-836
; VT-236
|
| Base |
Jumbo 4-pin bayonet (1918) (Codex=Br)
Top contact with a cap.
|
| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 2.5 Volts / If 4 Ampere / Half indirect |
Dimensions (WHD)
incl. pins / tip |
x 164 x 61 mm / x 6.46 x 2.40 inch |
| Weight |
76 g / 2.68 oz |
| Information source |
Tube Lore (II) p. 182 & 219
Tube Lore (I)
Taschenbuch zum Röhren-Codex 1948/49
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RK21: ARRL Handbook 1972
Anonymous 10 Collector
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Just Qvigstad
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RK21: Handbook Raytheon amateur tubes
Miguel Angel Trujillo-Rodriguez
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