[Elecraft] K4 Receive Filter question

[BRUCE WW8II]

I work in the 2 to 3 db above the noise floor CW, and 6 to 10 db above the
noise floor on SSB now, (that is why I presently own a K3s and a P3VGA)  so
I guess I will have to wait for the real answer. I really cannot
believe that Elecraft did not run their own test. If and when I spend my
cash I am not looking for the pretty blinkie colored lights and a fancy
screen, I want performance.  My really big issue is: receiver noise floor,
sensitivity and DSP that does not distort or degrade the incoming signal.
 But thank all of you for your input  and I truly appreciate all the
comments.

Bruce
WW8II



On Tue, Jan 19, 2021 at 10:43 AM Louandzip via Elecraft <
elecraft at mailman.qth.net> wrote:

>  That's not a simple or easy question to answer, especially since there's
> been no independent test of a K4, and there are many different criteria
> that go into it.  That said,  I'll go out on a limb and say that in most
> all practical situations on the air, it won't be. I say that because I've
> listened to and half-assedly compared a number of very good radios and some
> less good radios on the air. They might sound different, and take some
> tweaking of the controls to make them sound a similar as possible, but in
> the end I couldn't copy sigs better on one than the other. The K3 is really
> good in the tests, and I'm confident the K4 will surpass it, but that's at
> level that will only matter in what I consider to be exceptional
> circumstances.
>
> I'll add that I'm not the radio connoisseur that some are, and what I feel
> is largely the same, others may find hugely different. That doesn't stop me
> from wanting the best, even if I believe it won't make a practical
> difference in my operating.
>
>
>
>
>     On Tuesday, January 19, 2021, 12:47:17 AM MST, BRUCE WW8II <
> wa8hgx at gmail.com> wrote:
>
>  I also would appreciate a real answer to the question.  The question is
> will the K4 or K4D be as good or better on receive than my K3s with the
> 2.1kHz and the 200Hz filters.
>
> Bruce WW8II
>
> On Tue, Jan 19, 2021 at 12:56 AM RVZ via Elecraft <
> elecraft at mailman.qth.net>
> wrote:
>
> > I believe there are no crystal Roofing Filters in the standard K4 model.
> > Yet the manual talks about "one set of receive filters".  Please advise
> the
> > type and bandwidth of these filters?  (DSP?)
> >
> > From the K4 Manual:  There are three models: the basic K4, with one set
> of
> > receive filters and one analog-to-digital converter (ADC); the K4D, with
> a
> > second set of receive filters and a second ADC; and the K4HD, which adds
> a
> > superheterodyne front end that can be enabled as needed to provide even
> > greater dynamic range. The superhet module uses high-performance,
> > narrow-band crystal filters such as those used in the Elecraft K3S.
> Thanks
> > & 73, Dick- K9OM
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