On Mar 15, 2005, at 3:41 PM, [EMAIL PROTECTED] wrote:
I'm sure that this has been discussed many, many times, but would you
be so kind as to give me the pros and cons of the various filter
options? Also does grounding the crystals at the bases significantly
improve filter performance?
The current KSB2 uses the 2.2 kHz bandwidth, as designed by John KI6WX.
This is probably a good choice for most hams. There are a few who like
more "fidelity" in their audio, and opt for the 2.5 kHz bandwidth.
Several builders have recounted this change. The only con on the wider
bandwidth is you are more susceptible to adjacent QRM.
The original KSB2 had about a 2.0 kHz bandwidth, which I thought was
adequate. I'm one of the few who has opted for the "1.9" kHz filter. It
really isn't any narrower than the original 2.0 kHz filter -- but it
has a lot less passband ripple. Since much of my K2 use is during radio
contests, I prefer the narrower bandwidth.
When you order your KSB2, you can ask Elecraft for the appropriate cap
values for any of these filters. I think they can handle that.
Bill Coleman, AA4LR, PP-ASEL Mail: [EMAIL PROTECTED]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
