[Elecraft] K3 Filter question - SSB

David Gilbert xdavid at cis-broadband.com
Thu Nov 10 14:50:43 EST 2011



I've had exactly the same experience.  If the offending QRM is outside 
the passband of the filter, the narrower filter setting helps.  However, 
If the offending QRM is heavily inside the passband (i.e., splatter), it 
seems that the additional intelligibility gain by capturing more of the 
desired station's audio bandwidth can often more than offset the 
additional interference you get from using a wider bandwidth.  A lot 
depends upon the desired station's voice characteristics, but I've 
played with this quite a bit and the results can be surprising.

Splatter is the enemy of us all, except of course for the idiots who do 
it intentionally to give themselves "elbow room".  One of these days I'm 
going to start posting spectral screenshots of significant offenders on 
my web site.

73,
Dave   AB7E




On 11/10/2011 12:21 PM, Bill W4ZV wrote:
>
>
> I found my ears to be the best tool for copying weak signals in the presence
> of strong adjacent splatter.  For whatever reason they heard better using
> the stock 5-pole 2.7k set to a DSP BW of 2.0-2.1k than the 8-pole 1.8k set
> to actuate at DSP = 1.9k.  I tried many times to use the 1.8k but simply
> just found the 2.7k worked better for me.  Of course that's just my
> experience which wouldn't necessarily apply to everyone.
>
> 73,  Bill
>
>


More information about the Elecraft mailing list