[TowerTalk] Feedline

[ersmar@comcast.net]

Bob:

     A while back (ca 1995!) W3LPL compiled a table of coax cables vs loss.  You can find one source here:  http://www.k1ttt.net/technote/coaxloss.html#tables .  

     Frank recommended (elsewhere) that coax should be selected to keep the loss below 1 dB for the highest freq the coax run will carry.  So for 28 MHz and 200 feet of coax the conventional cable designs (RG-213, -8X and 9913) would be too lossy.  You'd more or less be forced to go with some sort of Andrew cable design such as Superflex (FXA12-50J).  

     Of course, you could accept greater losses in your coax runs and select one of the more common cable designs.  These tables will let you calculate the loss impact for each design you might consider.

73 de
Gene Smar  AD3F


 -------------- Original message ----------------------
From: wf3h at comcast.net
> OK I know this has the potential to open a can of worms, but I'm going to put up 
> a nice tower about 100-200' from the station.  I need a good feedline that is 
> low loss and easy to work with. Hardline is not an option.  
> 
> I will be feeding both HF and VHF antennas.  
> 
> Also, I'll be putting in a rotator (Ham IV). Any good rotator cable?
> 
> THanks all you experts! Appreciate it.
> 
> Bob/WF3H
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