Not to belabor this point, but the rig should also hold up for magnetic
fields. I'll bet many buyers of the rig will be running linears. I just
went through a difficult experience with a new piece of radio gear that
simply would not operate satisfactorily if it was anywhere within 24" of
my Alpha amp and it's transformer. It's just amazing what that magnetic
field will couple into. Forget RF isolation transformers, for example!
Hopefully their design and testing will check for this (run the rig with
amps on each side, above, and below the rig.)
73, Duane
On Wed, 6 Mar 2002 11:18:26 -0800 (PST) Duane Grotophorst
<n9dg@yahoo.com> writes:
>
> 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.
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
>
>
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Duane Calvin, AC5AA
Austin, Texas
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