Topband: Shunt feed foiled

Maurizio Panicara i4jmy@iol.it
Sun, 14 Oct 2001 15:47:01 +0200


>
> This seems to be confirmation of the importance of having no feedlines
> entering or leaving a shunt fed tower above ground.  Or am I
> misunderstanding?

In theory it's possible for a feed line and other cables to leave the tower
in any point, if you're able to decouple in that point and to minimize
common mode currents.
Practical reasons suggest that lines (and other cables) follow the tower for
the whole lenght down to the ground.
Alternatively it's the RF ground (radials) that has to be an effective one
and has to be elevated where the fed line or cables divert from the tower.

73,
Mauri I4JMY


> 73, Pete N4ZR