Topband: Models and the real world

[Sinisa Hristov]

Tom Rauch wrote:
 
> > To answer the point of Tom W8JI, for a 40 meter ground
> > plane up 20' and
> > having four resonant radials, the worst case coaxial cable
> > shield current is 14 dB
> > below the antenna current. To gain another 12 dB a 150
> > +j150 ohm common mode
> > choke will do it.
 
> Not true at all.
 
> I can model a 7MHz groundplane 20 feet high (or any other
> groundplane) with coaxial feedline and have MORE current on
> the feedline than exists on any single radial.


Agree. Depending on circumstances, it's possible to get
shield current almost as strong as the antenna current.


73,

Sinisa  YT1NT, VE3EA