I have confidence that the Orion synthesizer will be
very quiet in terms of phase noise. And I'm also not
too worried about internal digital noise coupling
issues either.
However the main point I think Carter was originally
driving at, and which is very important, is making
sure that the Orion will stand up solidly in an
unfriendly RF environment. Sure it is easy to say make
sure that everything is grounded properly, and yes it
is good practice, but it is not always the reality of
what peoples shacks are. If TT makes the Orion bullet
proof in terms holding up in such harsh RF
environments then it will be the competition that will
have the inferior immunity external RF/EMI. And as
Carter pointed out $5 or so in parts will go a long
way to making that happen.
Duane
N9DG
--- "George, W5YR" <w5yr@att.net> wrote:
> In many respects, the Kachina 505DSP was an
> excellent lab experiment for
> Doug Smith in the design and implementation of
> sophisticated transceivers.
> While it is a "good " radio in most respects, the
> ORION can be expected, in
> comparison, to be a SUPERIOR radio.
>
> The physical construction of the 505 with its
> motherboard and heavily
> shielded plug-in modules is a study in compact
> construction with minimal
> crosstalk and other internal RFI problems.
>
> 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
>
>
> Paul Christensen wrote:
> >
> > > While we are on the subject, hopefully the
> synthesizer board will be
> > > designed properly- wide ground traces on the
> board, bypass capacitors,
> > > ferrite beads and other fixes already discussed
> here so we can avoid the
> > > "birdie issue".
> >
> > Between the lessons learned from the design of
> both the low-noise Kachina 505DSP and Ten-Tec RX-340
> DSP products, I think we're
> > going to find a new level of low-noise synthesizer
> in the Orion. If the Orion can match the RX-340 in
> this performance
> > area...consider it a non-issue, even up to 30 MHz.
>
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> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
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