Great review, Since one of the design Engineers came from Kachina to TenTec
what do you bet that the Orion has the best of both worlds.
KO4O
----- Original Message -----
From: "Duane Grotophorst" <n9dg@yahoo.com>
To: "George, W5YR" <w5yr@att.net>; "Gary Hoffman" <ghoffman@spacetech.com>
Cc: "Ten-Tec Reflector" <tentec@contesting.com>
Sent: Tuesday, October 29, 2002 23:21
Subject: Re: [TenTec] Receivability
>
> I've recently acquired a Kachina 505 and ave done some
> subjective comparisons of the filtering in it vs. the
> Pegasus and IC-765. For the same SSB bandwidth the
> Pegasus filter seems to be about the same as the 765
> for shape factor, the 505 clearly has the better shape
> factor than either the Peg or 765.
>
> Another area that was interesting to compare was the
> Noise Reduction of the Peg vs. 505, there are some
> very notable differences with each radio having a
> distinct adavntage depending on what you are trying to
> do. For relatively loud signals (about S-7 and
> greater) the Pegasus NR did a better job of "erasing"
> the noise without adding any "watery" sounding effects
> to it like the 505 tends to do. For reducing the noise
> around a really weak signal however the 505 has a
> distinct edge, it will make marginally readable
> signals more copyable, the Peg's NR does little or
> nothing for those same conditions.
>
> Other than these two areas there doesn't seem to be
> that dramatic of a difference between the Kachina 505
> and Pegasus for performance. In the end the Pegasus
> wins overall by virtue of its software support.
>
> Duane
> N9DG
>
>
> > > ----- Original Message -----
> > > From: "George, W5YR" <w5yr@att.net>
>
> > >
> > > > Very interesting, Gary, and thanks!
> > > >
> > > > I have made detailed spectral comparisons
> > between the IF DSP filters in
> > > the
> > > > ICom 756 PRO, the Kachina 505DSP of similar
> > architecture and the Icom 765
> > > > with conventional crystal filters. There is no
> > comparison whatever between
> > > > the shape factors and overall shapes of the PRO
> > filters compared to any of
> > > > the others. The PRO filters are mathemetically
> > nigh perfect in shape and
> > > > performance. I think that you have found that
> > the Pegasus IF DSP filters
> > > > are not the equal to the conventional INRAD
> > filters - that is very
> > > > surprising to me.
> > >
>
>
> __________________________________________________
> Do you Yahoo!?
> HotJobs - Search new jobs daily now
> http://hotjobs.yahoo.com/
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
|