[Elecraft] filters and contests and interference question/opinions

[goldtr8 at charter.net]

Thanks for all the replies.

I did forget about playing with the AGC so I went back and did some 
adjustments and was able to make things better.

I think that the problem is that there is too much junk in the passband 
during contests and asking the dsp to take it all out just does not 
work.

So I think that I will be looking for either a 1.8 or 1.5 filter.  I did 
pay attention to the pc screen to see how wide I was running the filter 
and most of the time I was below 1.8 in width and a fair amount at 1.4 
to try and reduce the splatter.

Thus until I have more filters to play with I wont know for sure.

Cheers
Don

~73
Don
KD8NNU


On Sun, Mar 25, 2012 at 11:10 AM, Peter Chamalian wrote:

> Sadly if the splatter is real (not an artifact generated in the 
> receiver)
> and the splatter is in the passband, no amount of filtering is going 
> to help
> get rid of it.  If the other guy's signal is broad then there isn't 
> much
> that can be done to get rid of it given today's technology.
>
> Pete, W1RM
>
> -----Original Message-----
> From: goldtr8 at charter.net [mailto:goldtr8 at charter.net] Sent: Sunday, 
> March 25, 2012 8:34 AM
> To: Elecraft_K3 at yahoogroups.com; elecraft at mailman.qth.net
> Subject: [Elecraft] filters and contests and interference 
> question/opinions
>
> After spending time in two DX contasts this year and also dealing with 
> lots
> of splatter from other stations during non contest conditions I find 
> myself
> continually dialing down tighter and tighter filter settings on phone 
> (ssb)
>
> Currently I have a 2.7, and 2.1 filter plus the narrow ones for 
> digital.
>
> My brain is starting to tell me to stop using the 2.1 and get either a 
> 1.8 or even a 1.5 or possibly both.   My thoughts are that the dsp 
> would work much better if some of the interference can be directly 
> blocked out by the filter.   These thoughts are guided by past 
> readings on the list that this is the case.
>
> What is the collective wisdom of these filter changes I am thinking 
> about.   I am curious about others who may have tried these and if 
> they kept them or if they thought it made no difference at all.
>
> Again thanks in advance for your help.
>
> ~73
> Don
> KD8NNU
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