* Al Fansome <alfansome69@yahoo.com> [2002 Feb 14 20:06 -0600]:
> I spoke to Inrad when I was considering filter mods in
> addition to those done by the previous owner. Inrad
> said there's an inherent blow-by flaw in the 920 that
> their filters wouldn't eliminate.
>
> Being a CW newbie, exactly what is blow-by and what
> would it sound like using a 500 Hz filter?
It's been about a year since I last used my '920 (still in the box from
moving...gahh!), however I recall that it manifests itself as stray
signals clearly beyond the filter passband. You will also notice it as
hearing the signal "on the other side" of zero beat. I found that
simply switching in the DSP even at its widest bandwidth eliminated the
blowby. INRAD is correct, the 400 Hz filter I bought from them did not
eliminate the blowby, but it sure allows the DSP to do its thing.
The first time I encountered the blowby I was quite disappointed. But I
think Yaesu opted to keep the radio in a lower price range and clean up
the effect with the DSP. With this in mind, I've come to enjoy the
capabilities of the '920.
73, de Nate >>
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