Topband: Narrow Filtering
richard at karlquist.com
Tue Feb 2 14:37:38 PST 2010
Steve Miller wrote:
> In a contest (particularly in a contest), it doesn't make sense to
> have filters any narrower than 500Hz. Why should other stations
> have to work like crazy to get into YOUR notch? We all have
> ears. Is it that difficult to use the human filter that's between them?
Here is what is wrong with this oft quoted "wisdom":
When there is a run station every 300 Hz, it becomes difficult
to distinguish between a station calling me off-frequency
vs a station calling my "neighbor" on-frequency. If a station
seems to be calling me off-frequency, based on his time relative
to my CQ, I have a strict rule to send "?" and wait to geta second call
before responding. Often that second call never comes and I know he's
working my neighbor, and the timing was coincidence.
During the recent contest, I was trying to work a station in
Europe that was about 200 Hz below an east coast big gun.
The big gun come back to me several times before realizing I
wasn't calling him. What is even worse is when BOTH stations
come back to me at once.
Yes, I know the solution to that is to send both his call and my
call. But many people calling me only send their only call.
I can't make them send my call.
The real solution is for everyone to learn how to tune their
radios to the right frequency.
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