[AMPS] ALPHA 77SX on 50Hz

[Vic Rosenthal]

> ARNE GJERNING wrote:
> 
> The other question is the concern of 50Hz vs 60Hz. Any problems here or
> precautions needed.

I built a 3300v power supply with the intent to use it in a 50 Hz country as
well as here in the US.  I asked Peter Dahl about this.  I was told that the
magnetizing current in the primary of a large 60 Hz transformer operating on 50
Hz would be excessive, enough to burn it out.  Much more iron is needed in a 50
Hz transformer -- the one I finally got weighed 60 pounds (27kg), compared to an
equivalent 60 Hz only unit weighing 40 pounds (18 kg).

73,
Vic, K2VCO
Fresno CA

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