Re: [Amps] Testing filament xfmr

[Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>]

Simpler is to connect an ampmeter  across the secondary, feed the primary from 
a Variac and wind up the Variac until trhe desired filament current flows. then 
leave it for a time and see how hot it gets. The probability is that most of 
the losses will be copper losses: leave it on full primary with open circuit 
secondary to get an idea of how much iron loss there is by the temp rise.

73
Peter SM/G3RZP/P
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