[Moon] Radio compass

[peter blair]

 Does anyone know the correct 400Hz voltage rating of the Bendix radio compass indicator type I 82A , see here http://www.compassmuseum.com/aero/aero.htm#BENDIX
 also, I saw somewhere a reference to a simple  HB 400Hz supply circuit.... but where?
 many thanks for any help. 
 Peter G3LTF 
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