Re: [TenTec]omni-d (genealogy)

["Steve N4LQ" <n4lq@iglou.com>]

I believe you could consider the Delta 580 as TenTec's first Dual Conversion 
receiver. The first IF was at 11mhz and the second was at 6.3mhz. The 11mhz 
IF had a roofing filter with no optional filters available. I think this was 
their only product built like this. This scheme eliminated the spurs on 17 
meters plus some image problems found in the single conversion rigs, Omni, 
Triton, Argosy etc. The 11mhz IF had very little if any gain and contributed 
almost nothing to the noise therefore the 580 was one of the quietest 
receivers around. The variable preselector was replaced by fixed passband 
circuits for the front end. Unfortunately it retained the audio derived agc 
design and with no RF gain control it suffered from the annoying pop on 
strong signals with no easy means of compensation.

Steve N4LQ
----- Original Message ----- 
From: "Duane Grotophorst" <n9dg@yahoo.com>
To: <tentec@contesting.com>
Sent: Saturday, December 11, 2004 10:02 AM
Subject: Re: [TenTec]omni-d (genealogy)


> Another radio to think about when pondering the Ten
> Tec genealogy is the 580 Delta. It is rather unique in
> that it did not use any 9MHz IF filters at all like
> the 540/544, Omni's, Argosy's, Paragon and others. The
> reason I bring this up is that the same 6Mhz IF
> filters that were used for the 580 Delta later became
> the second IF filters for the Corsair's, Omni V/VI's
> and Paragon. So I have always thought of the Corsairs
> and later analog-only IF Ten Tec models as being
> somewhat of a homogenization of the original Omni
> series and the 580 Delta, - for whatever that's worth.
>
> Duane
> N9DG
>
>
>
> --- Carl Moreschi <n4py@earthlink.net> wrote:
>
> > Bill,
> >
> > This was done about a year ago or so on this
> > reflector.  But I will try from
> > memory to give the genealogy.
> >
> > After the Omni C, the main transceiver evolution
> > continued as follows:
> >
> > Corsair
> > Corsair II
> > Paragon
> > Omni V
> > Omni VI
> > Paragon II
> > Pegasus
> > Jupiter
> > Orion
> >
> > There were of course many side branches for all the
> > other transceivers.
> >
> >
> > Carl Moreschi N4PY
> > Franklinton, NC
> > ----- Original Message -----
> > From: <Able2fly@aol.com>
> > To: <tentec@contesting.com>
> > Cc: <n4py@earthlink.net>
> > Sent: Friday, December 10, 2004 7:26 PM
> > Subject: Re: [TenTec]omni-d (genealogy)
> >
> >
> > >
> > > Karl,
> > >
> > > Thanks for the history lesson (as far as it went).
> >  Could you please carry
> > it
> > > a bit farther to include the Paragons,  Corsairs,
> > and the ensuing  Omnis.
> > If
> > > it  hasn't been done already, it'd be nice for
> > someone to compile a Ten
> > Tec
> > > time  line listing all the transceivers and their
> > features. It'd be sad to
> > see
> > > the memory such a rich part of hamdom's past lost
> > altogether.
> > >
> > > 73,
> > > Bill   K3UJ
> > >
> ===========================================================
> > > <Karl wrote:>
> > >
> > > The original Omni's were as follows:
> > >
> > > Omni A  - Analog  version
> > > Omni D -  Digital version
> > >
> > > Then came the series B  modification which added
> > two additional IF filter
> > > slots, 30 meter receive and  an AUX band position.
> >  So this made
> > >
> > > Omni A Series B - Analog  Version
> > > Omni D Series B - Digital Version
> > >
> > > Later, TenTec had an upgrade  kit that added the
> > 12 meter band to the AUX
> > > position, and 30 meter transmit  to the above
> > radios.
> > >
> > > Finally, the Omni Series C came out.  It was
> > available only in digital.
> > It
> > > added the 18 mhz band, individual  selection of IF
> > and audio filter, and
> > XIT.
> > >
> > > 73,
> > >
> > > Carl Moreschi  N4PY
> > >
> > >
> > >
> > >
> > >
> >
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> > TenTec@contesting.com
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>
>
>
>
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