[TowerTalk] Bandwidth of a 1/4wl 80m vertical

[Richard (Rick) Karlquist]

I did a study of bandwidth vs diameter and there are 3 results:

1.  Bandwidth increases fairly slowly with diameter.

2.  No practical diameter is going to cover 3.5-4 MHz with a
fixed match.

3.  Making the antenna fat lowers the radiation resistance, and
increases ground losses.

I'm going to stick with my 3 inch irrigation tubing, which is
3 inches mainly for mechanical reasons.

Rick N6RK


w8zn at comcast.net wrote:
> 
> Hi all,
> 
> To those running 80m 4 squares, what kind of bandwidth do you typically see? Is it about the same as a typical dipole or 1/4wl sloper? Does anyone know if using a larger radiator (such as Rohn 25 vs 3"/4" irragation pipe) gives broader bandwidth or is the diameter to wl ratio just too small to make any diff?
> 
> thanks!!
> 
> Terry
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