[K3PZN-List] FD2008 Advanced Planning

[Andy Leeds]

Yes, that is the kind I was talking about, not trying to isolate 2 
stations on the same band from each other. I should have clarified. 
Filters for 2 signals on 1 HF band would need much higher Q and would be 
physically prohibitive for HF frequencies and high power levels. I've 
seen resonant lengths of coax used as notches, but again in this case 
the Q would be far too low to get decent isolation out of it. I'm sure 
with some surplus water pipe (more like water main, something about 24" 
- 36" diameter) we could create something but the cost and physical 
aspects make it an impractical idea (but probably a good idea for an 
April QST article).

Andy
Curt Milton wrote:
> Andy
>
> we did not use any extra bandpass filters (that i know
> of) during the contest.  
>
> last i knew the club does have a set of bandpass
> filters.  these are designed to reject interference
> from radios on a different BAND, saying keeping a 20m
> meter SSB signal on 14.200 from interfering with a 40m
> CW signal on 7.035.  they are not sharp enough to
> prevent interference from two radios in the same band.
>  
>
>