I also use the 500 Hz filters stacked in RTTY QRM situations, and one would
think that since the shift is 200 Hz (right?) that a 250 Hz filter stacked with
a 500 Hz should still work ok, but might be a bit narrow to tune a signal
quickly.
On DSP, I've found the KAM-Plus works better without the DSP most of the time.
There are very rare instances where it helps. Likewise, don't turn on the low
pass filter! I use DSP 100% of the time in CW and SSB however. (Omni-VI+)
There's my input, FWIW.
73, Duane AC5AA
Duane A. Calvin
Server Systems Test Engineer
Dept. 76TS RS/6000 - SP Nodes
Austin, TX >O< Tie: 793-3368
owner-tentec@contesting.com on 07/24/98 02:22:50 PM
Please respond to andrenr@ul.com
To: tentec@contesting.com
cc:
Subject: [TenTec] More 250 Filter Stuff
>From some of the responses I've received, my initial posting wasn't very
detailed regarding the use of a 250 6.3 IF filter for TTY use. I should
explain that I already cascade the 500 6.3 and 9 Meg filters, and together
they are superb. While contesting, I use this combination most of the time.
During a contest isn't the time to learn about your filters, so that's why I
asked the question. Sure, I'll play around with it while copying TTY sigs to
see what happens, but while under a heavy QRM attack is when you really get a
chance to see a filter perform. Most of the time, I would think a 250 would
be too narrow, and miss some people who mis-tune. Of course, the main
purpose of this filter is for CW use.
I guess I should also mention that the radio I run is an Option 3 Omni VI.
Has anyone found the DSP to be useful using TTY? I personally find the DSP
to be most useful for CW.
73/DX de Rick N9THC
--
FAQ on WWW: http://www.contesting.com/tentecfaq.htm
Submissions: tentec@contesting.com
Administrative requests: tentec-REQUEST@contesting.com
Problems: owner-tentec@contesting.com
Search: http://www.contesting.com/km9p/search.htm
--
FAQ on WWW: http://www.contesting.com/tentecfaq.htm
Submissions: tentec@contesting.com
Administrative requests: tentec-REQUEST@contesting.com
Problems: owner-tentec@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|