Antique radios, Old Time Radios
NR55
| Base |
British-7-Pin, old (M7A) (Codex=Na)
Top contact with a cap.
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| Filament |
Vf 13 Volts / If 0.15 Ampere / Indirect |
| Description |
According to the specs for CV1000 and CV1109, both giving NR55 as direct equivalence, at least two sources exists for this tube with different heater current drains. A 200mA heater current version of NR55 is given in the spec sheet of the CV1109.
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
-- Original-techn. papers.
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NR55: Manufacturer's Literature
Emilio Ciardiello
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Just Qvigstad
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NR55: Manufacturer's Literature
Emilio Ciardiello
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