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 3/25/2012 5:53 AM, Don Wilhelm wrote:
The DSP filters can deal with all the interference as long as it is not
overloaded - and overload is what the Hardware AGC prevents.
And as long as the interference is not on YOUR frequency, which is sadly
all too common during contest stations heavily
-Original Message-
From: gold...@charter.net [mailto:gold...@charter.net]
Sent: Sunday, March 25, 2012 8:34 AM
To: elecraft...@yahoogroups.com; elecraft@mailman.qth.net
Subject: [Elecraft] filters and contests and interference question/opinions
After spending time in two DX contasts
goldtr8 wrote
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
Hi Don,
Every now and then on this subject, I have to throw in this rather
significant (IMHO) caveat on all this talk about how good the DSP
bandwidth is. I have an old MP, INRAD 8 pole filters in 8 and 455
IF's, that has selectivity just barely matched by a K3 with 8 pole
roofing filter AND DSP
Guy,
I will agree with you for CW - cascaded filters of approximately the
same width can be necessary.
However, the question had to do with SSB width filters, and there I
believe the answer is different.
73,
Don W3FPR
On 3/25/2012 10:05 AM, Guy Olinger K2AV wrote:
a K3 with 8 pole
roofing
Hi Bill,
Thanks for the reply.
You are correct that I am new to contesting and do the SP method. So
yes I try to dial in the frequency and tighten the filters as much as
possible.
Yes I was getting some AGC pumping and after emails stating this I went
and played with my settings on low and
On 3/25/2012 6:20 PM, Bill W4ZV wrote:
so after the contest I traded my 1.8k XFIL for a 2.1k.
I'm also thinking of doing that. A major reason is that when the station
you're trying to work is so badly distorted that it's turned to mush and
hard to copy, a narrower filter seems to make it even
On 3/26/2012 10:30 AM, Jim Brown wrote:
A major reason is that when the station
you're trying to work is so badly distorted that it's turned to mush and
hard to copy, a narrower filter seems to make it even worse.
Well, that's a relief! I dabbled in the WPX SSB, SP only, and figured
my
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
Don,
The DSP filters can deal with all the interference as long as it is not
overloaded - and overload is what the Hardware AGC prevents.
What I am saying is - turn Hi-Cut down so you have the equal of a 1.8 or
1.5 filter - then if you begin to hear the Hardware AGC pumping from the
nearby
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