[Elecraft] FW: Sherwood Engineering Tests

[Wayne Burdick]

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
> 	
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to n6kr at elecraft.com