[Elecraft] K3: Rob Sherwood's full text reply

[DOUGLAS ZWIEBEL]

Okay...I sent out about a dozen private "forwards" around 0800z.  Just
got back on line, and my in box double that again.

So shown below is a cut/paste of the full text NCØB reply.  Nothing
earth-shattering.  I also received (from a separate source) a note
indicating that the 250hz filter (which, as mentioned below, is "more
like 375hz") came in at 98, which seems to fit with what Rob is saying
(but Rob never told me 98).

ENJOY!

de Doug KR2Q


from	Rob & Terri Sherwood <rob at sherweng.com>
to	DOUGLAS ZWIEBEL <dougzzz at gmail.com>,
date	Fri, Apr 18, 2008 at 10:27 PM
subject	Re: K3 various roofing filters
	
	
Hi,
The results are on my web site now. http://www.sherweng.com/table.html

While I did not include the 250 Hz filter (which is more like 375 Hz),
it fits between the 200 and 400 in dynamic range (DR3).
They all work.  I doubt anyone could tell the difference on the air
from a DR3 standpoint.
One can certainly tell the difference from a bandwidth standpoint.
Personally I would use the 500 and 200.  One could also choose the 400
and the 200.
On SSB I think I would add the 2.1.  One can always set the DSP to 1.8
when needed.  If a contester only, maybe the 1.8 instead of the 2.1,
but I would have to evaluate that over time, and I did not have the
2.1, and I did not listen to the K3 in an SSB contest.

The 2.7 in my borrowed K3 had some passband tilt or ripple, and I
could never get LSB and USB to sound the same on noise.
Feel free to post any of this on the reflector.
73, Rob Sherwood, NC0B