[Elecraft] Which KSB2 bandwith do you like?

[Bill Coleman]

On Mar 15, 2005, at 3:41 PM, paulrubin at houston.rr.com 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: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901