Hello Gene and thanks for reply. Yes I used the fan dipole on my novice station
and worked pretty well and this configuration is a little different since the
center feed points will be 5-6 feet apart on a yard arm type hanging assembly
and will run parallel . One suggestion that got me thinking (this is where the
problems begin! me thinking) is to run a single feed to a balun and then a T
connector and seperate feeds to each dipole. Or just the T connector with each
dipole have their on balun and feed line.
Having the feed points 5-6 feet apart has me stumped on how would be the best
way to feed the dipoles
Thanks for the reply
73
John
KO4XJ
-------------- Original message ----------------------
From: "Gene Smar" <ersmar@verizon.net>
> John:
>
> 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
> worked.)
>
> 73 de
> Gene Smar AD3F
>
>
>
> ----- Original Message -----
> From: "John Hudson" <jd_hudson@comcast.net>
> To: <towertalk@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
>
>
>
> 73
>
>
>
> John
>
> KO4XJ
> www.w4nja.org/ko4xj.htm
>
>
>
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