I would actually expect them to be very similar since the DSP backend (while not identical) should be very similar. The SDR elements of the two are probably very close to the same.
Wayne has shown a talent over the years of applying software object encapsulation and reuse concepts in hardware design. DSP and SDR just sort beg for that to be applied in the K3 - KX3 design evolution. I'd also expect some lessens learned and improvements from the KX3 to migrate back into the K3 within the next 4-6 months too...
>
> Bill,
> I did not mean to put any blame on you. In fact I am very grateful to you for sharing with us your first hand impressions of this so much awaited radio. I am just genuinely interested if KX3 audio is the same or better then that of K3. I hope, when KX3 is in production, Elecraft or some of the users will measure in band IMD and come up with the figures. And I hope those figures will exceed similar specs of K3.
>
> 73, Igor UA9CDC
>
> ----- Original Message -----
> From: Bill K9YEQ
> To:
[hidden email]
> Cc: 'Elecraft'
> Sent: Friday, February 24, 2012 2:00 AM
> Subject: RE: [Elecraft] [KX3] KX3 update FT
>
>
> Igor,
>
> My hearing isn't perfect. Just ask my wife. I am using PC speakers, not
> headphones. My environment has fan noise... but to me they sound very
> similar, next to identical. I did not observe on a scope. YMMV.
>
> 73,
> Bill
> K9YEQ
> KX3 Field Test #12
> -----Original Message-----
> From:
[hidden email]
> [mailto:
[hidden email]] On Behalf Of Igor Sokolov
> Sent: Thursday, February 23, 2012 1:49 PM
> To:
[hidden email]
> Cc: 'Elecraft'
> Subject: Re: [Elecraft] [KX3] KX3 update FT
>
> ----- Original Message -----
> From: Bill K9YEQ
> >I do not generally use Software to run my Elecraft radios other than
> >the macros. I work on >PCs/software for a living, so I love the
> >options available with all the Elecraft radios. Like Greg, I >have
> >mine sitting just above the pullout keyboard/Mouse tray in front of the
> >K3. I have a easy to >reach antenna switch. I have listened to audio
> >coming from both units without any signal >conditioning, filters, NB,
> >NR, etc. Hard to tell the two apart on the PC stereo speakers. That is
> >very sweet.
>
> That is not quite what I was expecting. KX3 being SDR based should sound
> better then K3 because KX3 should lack in band IMD caused by non linearity
> of crystal filter. When I compare audio of my K3 with that of QS1R the
> difference is pretty noticeable. Well, sooner or later someone will measure
> in band IMD of KX3 and hopefully we will get objective data.
>
> 73, Igor UA9CDC
>
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