Charles Hutton wrote:
The impedance drops greatly as the wire approaches ground. If your Beverage
actually lies on ground, it's likely to have an impedance of around 200
Ohms. On grass / shrubs /etc it will likely be a bit over 300 Ohms,
depending on your soil of course. I choose to ignore the lower impedance and
use my normal 450 Ohm transformers. I don't feel the slight signal loss
hurts me at all.
Hi Charles,
If it is a terminated Beverage (mono directional instead of
bidirectional) the big disadvantage of an impedance mismatch would not
be signal loss, but rather reflections at the mismatch, which will make
the antenna work in both directions instead of only one.
Ken N6KB
_______________________________________________
Topband mailing list
Topband@contesting.com
http://lists.contesting.com/mailman/listinfo/topband
|