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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).
Wireless screening of a 20/25 tank engine and potential radio interference issues.

Identifier  ExFiles\Box 163\2\  img011
Date  29th August 1932
  
Y86008

To F.{Mr Friese} from Hs{Lord Ernest Hives - Chair}/Wst.
c. E.{Mr Elliott - Chief Engineer} Wor.{Arthur Wormald - General Works Manager}
c. By.{R.W. Bailey - Chief Engineer}

Hs{Lord Ernest Hives - Chair}/Wst.6/KT. 29.8.32.

WIRELESS SCREENING OF 20/25 TANK ENGINE.

We thank you for your F.2/JL. 27.8.32, referring to the above.

We can foresee no difficulty at all in screening for the wave-lengths referred to, providing we take special care to make a careful examination of the whole system, to ensure that nothing is left unscreened as in all the wave-lengths referred to, the degree of screening will be very critical.

We are rather surprised in view of the fact that such low wave-lengths, i.e. 60 - 100 metres, are being used for transmitting and receiving on these tanks, that the War Office have not called for screened sparking plugs. We should anticipate quite a good proportion of disturbance would be occasioned by unscreened sparking plugs.

Hs{Lord Ernest Hives - Chair}/Wst.
  
  


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