This is a very robust design.  I built one in 1982 and it is still going.

73, Mike KS0T


On 1/17/2014 2:04 PM, Roger Last wrote:
John ,

  you might like to try this link , http://www.warc.org.uk/proj_psu.php .

I built the one mentioned at the start of the article in 1989 and pleased
to say its still performing today , is this tempting fate?

Roger
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