Topband: Open wire line vs. Paralleled coaxials.

[David J. Sourdis]

I have a friend's farm near the coast line to use for contesting/DX. There is a group of palm trees, very tall, one of them is 25+ m. Interesting posibilities for a vertical array for top band, but it has a small drawback: it is 80m+ away from the TXCVR. 

I have used openwire line for my dipoles and other antennas also the window line 450 ohm and more with RG59 or RG6 in parallel using center conductors as open wire line. Shields tied together and grounded at matcher's chassis. Longest run ever used: abt 40m of RG6 paralleled. It can be installed as coax without the problems of the ladder line and antennas can be used on other bands.

Literature says that paralleled coax is not as good as "real" open wire line. Is there any other information or technical data available? Here, RG6 of good quality is cheaper than good RG213, even when doubled. For a long run of almost 100 meter to get comfortably to the tree group, I wonder if losses would be too much.

David  
HK1KXA
EC5KXA


 		 	   		  
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