Topband: Beverages sharing supports?
kgrimm at adelphia.net
Thu Nov 16 07:44:53 EST 2006
> Alan Benoit wrote:
>> Sorry for the possibly newby question, but I can't seem to find an answer to this in the ON4UN book or the archives:
>> Can 2 seperate beverages (seperate feedlines, seperate transformers, seperate ground rods) share the same supports? I have a 585' NE beverage I recently put up that uses 5' steel conduit supports with PVC pipe insulators at the top (~ 7' height). I have cut slits at the top of the PVC pipes and run the wire through those.
>> Could I drill a hole in the PVCs about a foot vertical down from the current wire and run another wire through these as an independent SW beverage without excessive coupling of the antennas?
>> Thanks in advance for your replies.
>> Alan, WQ5W
> Hi Alan,
> I'm not going to answer your question directly, but rather give you
> another idea.
> Since you intended to run a second Bev, presumably you also intended to
> run separate coax feeds to each. That being the case, why don't you
> send DC down the coaxes as well, to energise a relay at the far end of
> either coax. Use a SPST relay, and connect the end of the Bev wire to
> common, the inner of your coax to NO, and the termination resistor to
> NC. This way, as you select the required feeder, the terminations are
> switched automatically.
> This method removes the necessity for a second wire, with the possible
> problems of cross coupling. I used it very successfully when in Durban
> operating as ZS5K.
> 73, Greg, ZL3IX
Google is your friend. A search for two wire beverage will result in
several useful ideas. The link to the following article represents what
I consider to be the best way of doing the switching, alluded to by Greg
in his comments above. I've used this technique in the past and will be
erecting a NE/SW edition of the antenna later this winter......or
possibly next spring, depending on how the move to the new QTH goes.
k4xl at arrl.net
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