I keep seeing talk of the 400(435) or 500 combined with the 250(370).  I see
very little talk about the 200.  My thought was to use the 400 and the 200.
Maybe the decision should include the 500/200 combination.  Is the 200 just
"too narrow" or why don't I see more apparent use of it?  I know, what is my
use?  I want to be able to operate most all modes except AM and FM where I
have very little interest at this time.  Will the 400 cut out RTTY?

The other configuration I was considering was the 500 and the 250 but hadn't
added the filters to my order yet as I was trying to make up my mind but
comments here aren't really helping with my decision.

Thanks es 73, de Jim KG0KP

----- Original Message ----- 
From: "Bill W4ZV" <[EMAIL PROTECTED]>
To: <elecraft@mailman.qth.net>
Sent: Wednesday, May 28, 2008 6:23 AM
Subject: Re: [Elecraft] SV: Getting Ready For The 2nd RX





Lennart Michaƫlsson wrote:
>
>
> ... and what filters do the test pilots recommend?
> Presently I have 6, 2.8, 0.4 and 0.25 kHz - all being 8 pole.
>
>

One more issue Len.  In your example above, you should only use diversity in
the WIDTH range where identical filters will be in use.  You would want to
avoid using diversity with bandwidths where you would have filters of two
different bandwidths in use (e.g. above 2800 and below 400).

BTW, on another issue,  I assume you know the 250 Hz is actually ~370 Hz and
the 400 is actually ~435 Hz according to measurements provided by Elecraft:

http://www.zerobeat.net/mediawiki/index.php/K3_Roofing_Filters

If it were me, I might consider removing the 250 while you have the radio
open to do the KRX3 installation.  You could sell it and use the proceeds to
help pay for the second 400 to use in the KRX3.  There is so little
difference in actual BW between the "400" and "250" that I believe having
both may be redundant.

73,  Bill
-- 
View this message in context:
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