JGBOYLES wrote:
Hi Hank, A 1/2 wave shorted stub looks like a series resonant circuit. It
makes a good notch filter, which is one of the Amateur applications that I have
used. You are right, they don't dissipate any power since Power=I**2*R and R
equals zero.

Stubs dissipate the maximum amount of power possible since the SWR on a
stub is nearly infinite. If you don't believe it, hang a Bird Wattmeter
halfway down a stub. The ratio of Vmax/Vmin and Imax/Imin is very high.
If the stub were lossless, the SWR inside a stub would be infinite.
After all, a stub is merely a shorted or open piece of transmission line.
--
73, Cecil http://www.qsl.net/w5dxp



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