Rolls-Royce Archives
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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Specification sheet for 1 1/4 and 1 1/2 value ballast resistance.

Identifier  ExFiles\Box 168a\5\  img037
Date  19th January 1929
  
E7C. X7720
19.1.29.
1 1/4 and 1 1/2 VALUE BALLAST RESISTANCE
Specification.
Pure nickel wire, gauge 32 S.W.G. 30 inches and 35 inches length per ballast respectively.
EFC.
  
  


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