That's true, Shawn, but the best place for a preamp in VHF usage is at
the antenna - before you lose the signal in the coax!
73, Duane
(once upon a time, a VHF contester!)
On Sun, 9 Jul 2006 15:19:35 -0700 (PDT) Shawn Upton <kb1ckt@yahoo.com>
writes:
> Besides, wouldn't a preamp be best anyhow on 2m and
> up, to help with NF and coax loss? It's another part,
> yes; but since no coax is lossless and that also
> impacts noise figure, a preamp might as well be used
> if you're going to invest money into a good antenna,
> good feedline and a good radio.
>
> Shawn KB1CKT
>
> --- "Dr. Gerald N. Johnson"
> <geraldj@storm.weather.net> wrote:
>
> > On Fri, 2006-07-07 at 07:46 -0400, Scott Harwood
> > wrote:
> > > I recently acquired a 6N2 and agree with your
> > observations, but I also noted that the receiver
> > sensitivity on two meters was low compared to my
> > other ricebox receivers. I sent it back to Ten-Tec
> > for alignment. They returned the rig saying the rx
> > sensitivity was within specs. I now use it with a
> > Mirage preamp/amplifier and am very happy with the
> > little rig.
> > >
> > > Scott K4VWK
> >
> > The 6N2 should have a quiet receiver. Its MDS
> > specification is 10 dB
> > poorer than a rice box on 2m and 2m rice boxes are
> > at least 10 dB poorer
> > than 2m atmospheric noise in mid USA and more than
> > 10 dB poorer than the
> > 2m receiver state of the art for sensitivity. Of
> > course that makes it
> > easier to stand strong signals, and adding external
> > broadly tuned
> > preamps makes it a whole lot more susceptible to out
> > of band strong
> > signals like pagers and repeaters.
> >
> >
> > --
> > 73, Jerry, K0CQ,
> > All content copyright Dr. Gerald N. Johnson,
> > electrical engineer
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
>
>
> Shawn Upton, KB1CKT
>
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--------------------------------------
Duane Calvin, AC5AA
Austin, Texas
http://home.austin.rr.com/ac5aa
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