[TenTec] Corsair II Conversions

[Sherrill WATKINS]

Doug: I also really believe in condensers.  Every whiskey distillery must have one! - sherrill   k4own

>>> "Carl Moreschi" <cjm@qvssoftware.com> 10/18/00 12:55PM >>>

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
> >
> > --
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>
>
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