Re: Attic Antenna
Posted by
N2EY on
Oct 29, 2006; 1:57pm
URL: http://elecraft.85.s1.nabble.com/Attic-Antenna-tp394788p394800.html
In a message dated 10/27/06 4:38:23 PM Eastern Daylight Time,
[hidden email] writes:
> The Diamond bottom tube may, (and likely) contains a broad band ferrite
> cable choke.
Probably - to keep RF off the outside of the coax. Such a choke would cost a
few dollars at most.
Or there may be a combination trap/ loading coil such as used
>
> on some tri band beams for multibands.
>
No, that wouldn't work.
Traps are used in the radiator itself, not at one end.
The BB7 claims SWR of less than 2:1 over the entire range. Traps and loading
coils won't do that.
It's resistively loaded.
73 de Jim, N2EY
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