[OZAPRS] Voice Alert
Dave Horsfall
dave at horsfall.org
Thu Jul 29 22:44:15 EST 2004
On Wed, 28 Jul 2004, Robert Bruninga wrote:
> >Have we settled on 123Hz? [for voice alert?]
>
> I'm kicking myself for having chosen 100 Hz in the USA not realizing
> that some countries have 50 Hz power systems making that impossible.
You, and many others before you :-(
Silicon decoders, for example, come with a 120Hz notch filter, but *not* a
100Hz filter.
Hey, aren't there supposed to be more countries on 50Hz than 60Hz?
-- Dave
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