Topband: 160 ground plane choke

[Cqtestk4xs--- via Topband <topband@contesting.com>]

I've been using a 160 GP with 4 radials.  It's a Tee-top  supported with a 
rope between two towers, with the top around 165 feet and the  base at 70 
feet.  I'm feeding it with RG8X to keep the weight down on  the rope which 
supports it.
 
Although it works well I would like to negate any loading which  might be 
taking place on the feed line which drops from straight down from  the base.  
Any ideas for a cheap, easily made, effective choke on the  feedline?
 
Bill K4XS/KH7XS
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