[TowerTalk] CATV hardline question and cage dipoles

Gene Smar ersmar at verizon.net
Tue Jul 8 22:53:43 EDT 2008


     If the two cage dipoles can be fed from the same coax line, then there 
is no need for a T connector and parallel lengths of 75 Ohm cable.  Simply 
connect both wire sets to the same center insulator and string the antennas 
up either in the same vertical or horizontal plane.  This is known as a 
spider web dipole set; my Novice station back in the mid-60s used this type 
of antenna for 80, 40 and 20M.  Seemed to work ok for me (all wires were no 
higher than 20 feet above ground so you know how well that would have 

73 de
Gene Smar  AD3F

----- Original Message ----- 
From: "John Hudson" <jd_hudson at comcast.net>
To: <towertalk at contesting.com>
Sent: Tuesday, July 08, 2008 10:27 PM
Subject: [TowerTalk] CATV hardline question and cage dipoles

I've came into a length of 75 ohm ¾" hardline and wanted to use it to feed a
pair of cage dipoles for 80 meter and 40 meters, supported by the same tower
assembly at 60-65' high and the hardline would be approx an 145 feet run.
Could it, would it or should it be able to feed both dipoles with the one
feed line into a "T" connector or some other assembly with a 50 ohm feed
line to each dipole?

Now just for discussion purposes both dipoles would be used and supported
approx 5-6 apart from each other. It will be possible to lower one from the
other if need to be.

If this is not possible then the 80 meter cage could be used only but both
antennas are already built and ready to be strung up..

PLUS I'll be using the hardline to feed a TA-33/40m and a 17M monobander
with an Ameritron remote switch on a crankup and also feeding a hombrew
Hytower project

Thanks for any help and or suggestions





TowerTalk mailing list
TowerTalk at contesting.com

More information about the TowerTalk mailing list