Hi,

     I built this power supply for my Ham Radio HF station. The radio is=20
an Icom IC-7200, usually running 20-30W output on JT65.
     After a couple months the bridge rectifier failed. Two diodes=20
shorted. It is a common KBPC3510.
     Changed the bridge. Three month later, bridge failed. This time I=20
replaced it with a KBPC5010.
     That one lasted only two weeks!

     It seems heat is not the problem, the bridge goes to 60C max when=20
transmitting.
     On every failure the power supply was in light use and the bridge=20
was just warm.

     I'm thinking of building a soft-start circuit just to see if it helps.

     Any ideas?

     Thanks.
     Mark Jordan



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