On 15 Jun 2006 11:51:24 -0700, "
wrote:

so I can use the 2:1 SWR bandwidth as
per the description he

http://lists.contesting.com/_amps/2006-01/msg00179.html

Once you know the Q, you need to know the antenna's radiation
resistance using some method, so that you can figure out the loss
resistance.

Hi Dan,

Conceptually close, but certainly not to the degree of accuracy you
might expect. 2:1 SWR points are not half power, as would be the
classic determinant for Q bandwidth. As your link provides, it is 88%
power points.

73's
Richard Clark, KB7QHC