[R-390] 400 cycle ac

[Steve Hobensack]

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A lot of times an old 400 cycle powered military or aircraft radio
can be made to operate on single phase ac power by replacing the
power transformer with a single phase 60 cycle unit. Voltages do not
have to be exact but close. The filter cap value will need increased.
The transformer will be larger and present a size problem. Usually an
external power supply is homebrewed.
  73...Steve...KJ8L

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