[Elecraft] Noise Power Ratio and the K3 with new synthesizer?

[Phil Wheeler]

Or perhaps the author will update his article, 
which was outdated at the date of publication :-)

Phil W7OX

On 3/12/15 9:23 AM, Hank P wrote:
> I read that article and was hoping Wayne or one 
> of the guru guys would comment . It is probably 
> picking specs out of the pepper , but it seems 
> to me that testing a  K3 around 5300 khz means 
> there is essentially no benefit from the ham 
> band bandpass filters the K3 uses - Would like 
> to see those numbers compared for instance with 
> the 3880khz   or whatever freq it was with a 
> filter in a ham band. (I am NOT talking about 
> roofing filters)
>
> Hank K7HP
>
>
> -----Original Message----- From: Chip Stratton
> Sent: Thursday, March 12, 2015 7:53 AM
> To: Elecraft Reflector
> Subject: [Elecraft] Noise Power Ratio and the K3 
> with new synthesizer?
>
> Adam Farson VA7OJ has an article in the current 
> March/April 2015 QEX
> discussing the use of Noise Power Ratio (NPR) to 
> help define a
> receiver's performance in a crowded band in a 
> way that might be more
> illuminating than the simpler two tone tests. 
> Its an interesting
> discussion which makes some sense, but then I'm 
> not anywhere close to
> an expert in that field.
>
> In any event, he has figures from a number of 
> transceivers, including
> a couple of K3s which no doubt do not have the 
> new synthesizer. The
> K3s still performed very well relative the the 
> rest of the field in
> these tests, though they were slightly behind 
> the IC-7700, IC-7800,
> and TS-590S.
>
> Which of course makes me wonder how the K3 with 
> new synthesizer would
> perform in this arena?
>
>> From a guy with a mild metrology addiction...
> Chip
> AE5KA