[Elecraft] [K3] Re： Re： K3 VS 7600 Sherwood List

[David Y.]

Bill and All,

I think you hit the nail on the head Bill!  Johnny seems to be very nicely 
equipped over there, and certainly should be proud of the choices he has 
there in his shack.  However, if you aren't much interested in CW, a great 
deal of the refinement of the K3 can be pretty subtle.  I suppose if I only 
operated SSB, I might be just as happy with a 7600, 7700 or 7800--maybe even 
happier in some respects.  There are several operating conveniences the 
Icoms have which the K3 really doesn't effectively compete with.  Even on CW 
this can be the case, unless you are really in a battle with QRM. 
Nonetheless, I'm still extremely impressed that I can pretty much stand toe 
to toe with the Icoms, save several thousands dollars, and still have a rig 
I can pick up with one hand--two fingers actually, if I grab the handle. 
Not everyone sees it that way though, and I understand their side of the 
comparison.  It's just a matter of what your "hot buttons" are.

Dave W7AQK


----- Original Message ----- 
From: "Bill W4ZV" <btippett at alum.mit.edu>
To: <elecraft at mailman.qth.net>
Sent: Sunday, September 06, 2009 3:13 AM
Subject: Re: [Elecraft] [K3] Re： Re： K3 VS 7600 Sherwood List


>
>
>
> Johnny Siu wrote:
>>
>> Secondly, I mostly operate in SSB and always openly admit that I seldom
>> operate CW. Having said that, I understand the joy of operating a SSB
>> station just 3kHz away from a local 1kw big gun within line of sight.
>> Again, I do not see a day and night difference among ic7800, ic7700,
>> ic7600 and K3.
>>
>
> This is the key to your perception of the K3 and the other rigs.  If 
> you're
> operating 3 kHz from any strong SSB station, the observed dynamic range
> (probably ~35 dB) is primarily limited by the cleanliness of his 
> transmitted
> signal (TX IMD, phase noise, etc) no matter how good your receiver may be.
> In fact Sherwood's ranking (2 kHz IMD performance) only makes sense for 
> CW,
> since it simulates performance of a CW receiver with strong stations 
> spaced
> every 2 kHz.  If you don't operate CW, then indeed there's probably little
> difference in any receivers since none of them can clean up transmitted 
> SSB
> QRM.
>
> If you operate CW in crowded contests or large pileups, there's a vast
> performance difference (20-30 dB in dynamic range) in the rigs you have.
>
> 73,  Bill
>
> -- 
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