Sorry, my memory failed me this time. The Omni V and Omni VI do not
up convert. They use the same conversion scheme as the Corsairs. Only
the Paragons up convert.
By the way, the original Delta had a true double conversion scheme. The
first
IF was a 500 Khz range around 11 Mhz and the second IF was fixed at 6.3 Mhz.
I don't know what scheme the Delta II used.
Carl Moreschi N4PY
cjm@qvssoftware.com
----- Original Message -----
From: "Carl Moreschi" <cjm@qvssoftware.com>
To: "Dan" <tacquire@earthlink.net>; <dslosty@pipeline.com>
Cc: <tentec@contesting.com>
Sent: Wednesday, October 18, 2000 12:55 PM
Subject: Re: [TenTec] Corsair II Conversions
>
> The IF conversion scheme in the Corsair II goes like this:
> The incoming signal is first converted to 9 Mhz. Then, just
> for passband tuning, the signal is converted to 6.3 Mhz. After
> going through the passband tuning filters, it is converted back
> 9 Mhz. If you didn't count the passband tuning two conversions,
> you could say it was single conversion. But actually, it is a
> triple conversion receiver - 9 to 6.3 to 9. This same scheme
> is in the Corsair I. The Omni V, Omni VI, Paragon I, and Paragon II
> add a first conversion to 45 -75 Mhz before converting to 9 Mhz then 6.3,
> then 9 Mhz again.
>
> Carl Moreschi N4PY
> cjm@qvssoftware.com
> ----- Original Message -----
> From: "Dan" <tacquire@earthlink.net>
> To: <dslosty@pipeline.com>
> Cc: <tentec@contesting.com>
> Sent: Wednesday, October 18, 2000 11:25 AM
> Subject: Re: [TenTec] Corsair II Conversions
>
>
> >
> > Yeah and electrons flow from positive to negative right? ;)
> >
> > Dan
> >
> > dslosty wrote:
> >
> > > >Anyone else notice that the (Ten Tec) ads for the Corsair II said
> "triple
> > > >conversion"?? Of course, it is not true, there are only two IF
stages,
> it
> > > >should be called "dual conversion" (unless you want to call the
OMNI-D
> > > >"double conversion, hi hi). I often wondered how such a mistake got
> made,
> > > >I think it was in the QST ads back when the rig was sold new.
> > >
> > > >I love mine even though it is only dual connversion :-)
> > >
> > > >Clark
> > > >WA3JPG
> > >
> > > I tend to agree with you but it all depends on how you define
> > > a "conversion". Some folks count number of I.F. frequency
conversions,
> > > others count the number of mixer stages.
> > >
> > > True single conversion rigs like old Swan 350's have only one mixer
> > > and change VFO frequencies on each band - that's why the multiscale
> > > dials were used - and why drift was often a problem.
> > > Recently, one such Swan owner did argue with me that rigs like the
> > > Ten-Tec Omni-D were dual conversion since it used two mixers in
> > > order to maintain the VFO at a constant 5 - 5.5MHz range.
> > >
> > > Thus one could argue that the Corsair II, with its two I.F frequencies
> > > and
> > > three mixers was triple conversion.
> > >
> > > It may well boil down to semantics and/or how far back your
> > > memory/training
> > > goes. Hey - I still believe in condensers!
> > >
> > > 73,
> > > Doug/WA1TUT
> > >
> > > --
> > > FAQ on WWW: http://www.contesting.com/FAQ/tentec
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> > > Administrative requests: tentec-REQUEST@contesting.com
> > > Problems: owner-tentec@contesting.com
> >
> >
> > --
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> > Problems: owner-tentec@contesting.com
>
>
> --
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> Administrative requests: tentec-REQUEST@contesting.com
> Problems: owner-tentec@contesting.com
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