ORIGINAL MESSAGE:
On Sat, 27 Mar 2010 22:26:25 -0400, "Gary Schafer"
<garyschafer@comcast.net> wrote:
>Quote from the 2008 ARRL handbook power supply section:
>"percent ripple is the ratio of RMS value of the ripple to the dc value in
>terms of percentage".
>
>As RMS does the same amount of work as dc does it would make sense to use
>RMS as a comparison.
REPLY:
Ok,that works if you're equipped to measure the true RMS value of a
sawtooth wave. I suspect most hams are not. Using a non-true RMS
meter, who knows what you'll get. Did the handbook mention that?
By comparison, a P-P measurement with a scope is unequivocal.
You pays yer money and takes yer choice.
73, Bill W6WRT
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