Topband: 160 top loaded vertical question (Kees Nijdam)

W7RH midnight18 at cox.net
Wed Feb 7 20:53:57 EST 2018


Kees,

A 50 ft high vertical with two top hat loading wires each equal length 
about 67ft will work great with a good ground field. It can easily be 
fed with a 4-1 toroidal transformer 50-12.5 Ohms. Absolute minimum 
radial field would be 30 1/4 wave radials adding as many possible short 
radials in space if required.

A small inductive coil wound on base insulator can easily tune the 
antenna to the band segment you want. Use large diameter copper tubing.

73


Bob

-- 
W7RH DM35OS


It has become appallingly obvious that our technology has exceeded our humanity.

Albert Einstein



More information about the Topband mailing list