[Elecraft] K3 - Filter suggestions for new builder

[Don Wilhelm]

Stan,

Since you have decided to go with the 2.7 filter, you have a couple 
decisions to make.  Do you pay for matched filters between the main and 
the sub so you can have good diversity reception, or do you "cheat" and 
set the filter offsets to the mean of the two filters.

At a 2.7 width, the small variation from the true offsets will not make 
much difference, but you do need to set them to the mean for diversity 
reception.

In other words, if one filter had a -600 Hz offset and the other -300, 
setting the offset for both at -450 Hz will work just fine. With more 
narrow filters, you may not be able to get away with that, but with wide 
filters, the percentage change is not as great.

73,
Don W3FPR

On 9/25/2012 4:06 PM, Stan AE7UT wrote:
> Thanks for all the feed-back.  It looks like I'm at least in the right ball
> park.
> I definitely want the diversity reception so I'll be doubling most if not
> all filters.
> I've decided to stick with the 2.7 for now.  I doubt my ears could hear the
> difference.
>
> Interesting that most here have gone with the 2.1 vs. the 1.8 KHz filters.
> I'm going to have to go home and listen closer to see if I like 2.1 or 1.8.
>
> Thanks again.  You guys have been a tremendous help.
>
> 73
> Stan AE7UT
>
>
>
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