On Thu, 18 Sep 1997 Ken.Silverman@zool.AirTouch.COM wrote:
>
> Ken Silverman@AIRTOUCH
> 09/18/97 05:06 PM
>
> While I haven't read all the mail on this one, I thought I'd throw in some
> other considerations on filter selection.
>
> One of the key things I am concerned about is the insertion loss of the
> tighter filters. Normally I like 500 Hz cascaded filters, and will never
> use 250hz filters in contests (especially from the DX side, from which I do
> a lot of contesting).
---
>
> Kenny K2KW
>
If switching in narrow bandwidth filters makes the signal-to-noise ratio
worse, the receiving system is internal noise limited. HF receiving
systems should be environmental noise limited, and then (on CW) the
narrower the bandwidth the better the signal-to-noise ration.
73 Jim w3cp headrick@radar.nrl.navy.mil
--
CQ-Contest on WWW: http://www.contesting.com/_cq-contest/
Administrative requests: cq-contest-REQUEST@contesting.com
|