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

[Hank P]

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
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