I like to run about 500 cycles on CW initially. Then I drop in a single 250
cycle in conjunction with the 2000 filter. And if it gets close I'll go 250
cycles and adjust the shift and notch to narrow it down some more. Works
fine except you miss those that can't get on frequency.
On RTTY I don't contest. But I do operate digital modes. On RTTY I find
setting the Mark to 1000 in the program will allow me to put in the 500
cycle CW filter. Works quite well indeed.
In PSK I run straight 250 cycle filters. Nothing bothers me. But I
understand some rigs can't do these things, such as running the cw filters
in phone mode. If so, use your shift and width in combination to sharpen
things up.
Dan/W4NTI
----- Original Message -----
From: "Jerry Flanders" <jeflanders at comcast.net>
To: <mrcne4s at attglobal.net>; <secc at contesting.com>
Sent: Monday, January 30, 2006 5:49 PM
Subject: Re: [SECC] Re AA4LR comment on a claim jumper
>I primarily run, and only (currently) work RTTY contests. With my
> 756PRO I have steep-sided filters, and routinely use 250 Hz, which is
> all I need to hear stns calling me BUT I worry about my CQ being
> heard by S&P guys using conventional filters. If they hear QRM near
> my call freq then maybe they can't copy me.
>
> So if I keep my filters narrow to help me receive weak stns then I
> don't hear nearby QRM when it starts up. Maybe I waste time calling
> when average stns can't copy me.
>
> There is probably an optimum Rx BW for calling stns. Any guesses?
>
> Jerry W4UK
>
> At 23:09 1/30/2006, Michael Condon wrote:
>>The quick answer is "all of it"...
>>The reality is "none"...
>>
>>But on CW with a 250 Hz filter on, someone inside of 100-150 Hz is
>>getting close.
>>I often work with someone who is positioned to produce zero beat to
>>me, so I just see AGC action, and that works fine. I will also move
>>when it is possible.
>>
>>I noticed this fellow when I moved to mitigate, and he just slid
>>each way with me.
>>
>>So, Jerry, How much space do you need?
>>
>>Mike...
>>
>>Jerry Flanders <jeflanders at comcast.net> wrote:
>>
>>How much space do you guys think is needed on each side of your
>>calling freq in a contest? - for what mode?
>>
>>Jerry W4UK
>>
>>At 16:06 1/30/2006, you wrote:
>> >FWIW
>> > I had someone jump my Freq, low on the band, and give me some ...
>
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