Not sure where the notion that a 2 dB NF is sufficient for 2M
SSB/CW work comes from. I suspect though that it is a figure
that has persisted for years in ARRL Handbooks. I would argue
that a NF in the .6-.8 dB range is a more realistic minimum
to shoot for. I run a transverter that is factory spec'd at
.8 dB at the end of a coax run with a measured loss of .8 dB
and still find occasions where I could use a lower NF. If you
are running an antenna with a clean pattern, low loss
feedline, and have quiet radio horizons at VHF a 2 dB NF in
the RX is simply not low enough for 2M.
Duane
N9DG
--- "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
wrote:
> All this adds complexity
> that wouldn't be there if the radio had a 2 dB NF instead
> of 12 dB.
>
>
> --
> 73, Jerry, K0CQ,
> All content copyright Dr. Gerald N. Johnson, electrical
> engineer
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