Jim, I would bet a six-pack that Doug wrote that material. He also wrote
the chapter in the recent Handbooks on DSP, using Kachina 505 DSP circuits
and scope pix, etc. for illustrations.
I say again, look for a lot of Kachina features, such as the elaborate
digital metering system, to show up on the Orion.
I am glad that Doug is finally with a manufacturer who is strong enough to
allow him to do a design like it should be done, and like the Kachina could
have been . . .
Of course, a few years have passed since the Kachina was conceived and
parts costs and performance have gone in opposite directions so the climate
is much better now for such a new transceiver development.
72/73/oo, George W5YR - the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
Amateur Radio W5YR, in the 56th year and it just keeps getting better!
QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771 I-LINK 11735
Icom IC-756PRO #02121 Kachina #91900556 IC-765 #02437
All outgoing email virus-checked by Norton Anti-Virus 2002
Jim Reid wrote:
>
> > In many respects, the Kachina 505DSP was an excellent
> > lab experiment for Doug Smith in the design and implementation
> > of sophisticated transceivers.
>
> I wonder if Doug Smith wrote the following very good explanation
> of the Kachina DSP rcvr design theory? Very well done, and
> I am getting close to "knowing" something about DSP rcvr's, but still
> quite a ways to go, hi. Have a look at:
>
> http://www.kachina-az.com/theory1.htm
>
> Guess I "know" what a roofing filter does, explained in the link,
> but why is it called a "roofing" filter?
|