Make a multi-coupler out of a stick of hardline, take your ports every
1/4 electrical wavelength using a 3-5 pf cap, seal everything with
copper tape or aluminum autobody shop tape - hold back the flames on the
aluminum please this is not going to be flexed like tower feedline.

nu5o wrote:
> 
> Good evening.  I have some TxRx bandpass filters that we are using
> in a 450-470 tower top preamp system.  The system will be installed
> on a new tower soon and we are trying to figure out a way to get 3
> windows instead of 2 out of the bandpass filter so we can add 448-
> 449.5 Receive on the amplified downfeed to the 2 commercial windows.
> 
> Has anyone done this and if so, what equipment and/or configuration
> did you use?  With high gain antennas at great HAAT and with tower
> top preamps, we just hate not to use it on the 440 ham band.
> 
> Thanks,
> 
> Andy NU5O/P29AM
> 
> 
> 
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-- 
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