[Elecraft] FW: Sherwood Engineering Tests

[Yngvi (TF3Y)]

Thanks for the explanation Wayne.

73, Yngvi TF3Y

On Tue, Feb 24, 2015 at 9:57 PM, Wayne Burdick <n6kr at elecraft.com> wrote:

> Just to complete the point about this: The K3 tested probably didn't have
> its S-meter calibration ("RX gain cal") completed before we sent it to Rob,
> an oversight on our part. This procedure is fully automated by the K3
> Utility program, and definitely would have corrected the sensitivity
> threshold issue Rob observed.
>
> 73,
> Wayne
> N6KR
>
>
> On Feb 24, 2015, at 1:54 PM, Wayne Burdick <n6kr at elecraft.com> wrote:
>
> > Some on this list are still mistaking this column of Sherwood's chart as
> *receiver sensitivity*. I believe it is a measurement of AGC threshold. The
> K3's receiver sensitivity (MDS) is excellent by any measure; see the "noise
> floor" column. (Side-note: It's interesting that the preamp-off sensitivity
> of the tested K3 was -136 dBm, while that of the Flex 6700 was -118 dBm --
> an 18-dB difference. One would have to leave the preamp ON much more often
> with the '6700. As Sherwood noted, this maximizes the '6700's dynamic
> range, but you'd also be hitting the A/D that much harder.)
> >
> > 73,
> > Wayne
> > N6KR
> >
> >
> >
> > On Feb 24, 2015, at 12:24 PM, "Chester Alderman" <
> aldermant at windstream.net> wrote:
> >
> >>
> >>
> >> _____________________________________________
> >> From: Chester Alderman [mailto:aldermant at windstream.net]
> >> Sent: Tuesday, February 24, 2015 1:59 PM
> >> To: 'Yngvi (TF3Y)'
> >> Cc: 'Elecraft Reflector'
> >> Subject: RE: [Elecraft] Sherwood Engineering Tests
> >>
> >>
> >> Hi Yvgvi,
> >>
> >> I wonder, given atmospheric noise levels, if that is really going to be
> >> noticed by the operator. I seriously doubt It would be noticed in a
> contest?
> >>
> >> 73,
> >> Tom - W4BQF
> >>
> >>
> >> -----Original Message-----
> >> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
> Yngvi
> >> (TF3Y)
> >> Sent: Tuesday, February 24, 2015 1:26 PM
> >> To: elecraft at mailman.qth.net <mailto:elecraft at mailman.qth.net>
> >> Subject: Re: [Elecraft] Sherwood Engineering Tests
> >>
> >> These are interesting stats.
> >>
> >> One thing I noticed was the apparent loss in sensitivity as measured by
> >> Sherwood. This is probably not a big issue for most these days with the
> ever
> >> increasing noise levels but for the few in silent locations, incl.
> >> some DXpeditions this might be an issue.
> >>
> >> Any comments on this?
> >>
> >> 73, Yngvi TF3Y
> >> http://www.tf3y.net
> >>
> >>
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