I shunt feed a US Tower HDX55 with a TH7 at 57 ft and a Cushcraft XM240 at
70 ft. It works quite nicely. I also shorted my parasitic elements to the
boom in a similar manner to Gene. I built a 12v remote tuning unit using a
8 rpm motor and a vacuum variable. Used number 4 insulated wire for the
shunt and tapped the tower at the top of the first section ( 24 ft). Did
not bond the other two sections. I got lucky and can tune it on 160M and
80M. Hope this helps.
Pat, K8PC
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