K3 Design

[Bill W4ZV]

 From the K3 FAQ:

 >With a first IF of around 8 MHz, how can the receiver be general
coverage?  Will there not at least be hole in the coverage around the
IF frequency?

 >General does not mean continuous in this case. There is a small gap
at 8.215 MHz. You may be able to tune to this frequency, or not,
depending on the firmware. There is a trap circuit to suppress
response at this frequency, so the receiver won't work very well
within several kHz of 8.215 MHz if it does allow you to tune  .

         Count me as one who is thankful I am not forced to
pay for General Coverage, FM, AM, ATU, bandscopes and
a host of other features I don't need.  Of course all of these
are possible for extra cost, but I'm not forced to pay for the
features I don't need and will never use.

         Modularization is truly the breakthrough in the
K3's design.  We only pay for what we need, whether it's high
performance RX (contests), true phase-locked diversity Sub
RX for low band DX-ing,  SWL GC, AM/FM modes, QRP, portability
or even a bandscope (eventually).  The customer pays for what
he needs and *not* for what he never uses.  This is how a very
high-performance K3 configuration can be so cost competitive.
I guarantee the K3 is causing headaches for the competition
even as we speak.

                                 73,  Bill  W4ZV

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[N8LP]

Amen to that, Bill.

73,
Larry N8LP



Bill Tippett wrote:

>
>         Count me as one who is thankful I am not forced to
> pay for General Coverage, FM, AM, ATU, bandscopes and
> a host of other features I don't need.  Of course all of these
> are possible for extra cost, but I'm not forced to pay for the
> features I don't need and will never use.
>
>         Modularization is truly the breakthrough in the
> K3's design.  We only pay for what we need, whether it's high
> performance RX (contests), true phase-locked diversity Sub
> RX for low band DX-ing,  SWL GC, AM/FM modes, QRP, portability
> or even a bandscope (eventually).  The customer pays for what
> he needs and *not* for what he never uses.  This is how a very
> high-performance K3 configuration can be so cost competitive.
> I guarantee the K3 is causing headaches for the competition
> even as we speak.
>
>                                 73,  Bill  W4ZV
>
> _______________________________________________
> Elecraft mailing list
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> You must be a subscriber to post to the list.
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> Elecraft web page: http://www.elecraft.com
>
>

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[Brett gazdzinski-2]

 Another thing elecraft is doing with the K3 is to put in
ham band only bandpass filters, with general
coverage filters optional, but when operating in the ham bands, the
ham band filter is switched in.

The single conversion is likely the major reason the K3
(and the K2) are so good.

My homebrew single conversion receivers seem to work real
well, a good 455 KHz filter is all it takes.
Ham bands only, very quiet, nothing modern works
as well as the homebrew receivers, except maybe the K3!
 

Brett
N2DTS


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