"Ken" wrote in message
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Switching wall warts I have tried introduce a loud "hash" that
completely hides weak signals; transformer wall warts I have tried
introduce an annoying buzz -- most likely 60 cycles.

Can anyone recommend a 400 ma wall wart with cleaner output?

Failing that, How about a simple, physically small circuit to clean up
a typical wall wart's noisy output?

Ken KC2JDY


Ken
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These are pretty well filtered.

http://www.radioshack.com/product.as...Fid=273%2D1667