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Old 24th August 2005 | 13:02
  #6 (permalink)  
HEATHROW DIRECTOR
 
Joined: Oct 2000
Posts: 8,266
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From: Berkshire, UK
<<Do any of you extremely clever folk know why aircraft use 400Hz ac? It must be nearly DC at that frequency>>

On the contrary, surely? It would be almost DC if it was 1 or 2Hz.... or is my aged brain playing tricks with my radio theory?
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