[Elecraft] Coax Loss Figures

[Radio Amateur N5GE]

On Wed, 23 Jun 2010 11:43:30 -0500, "Phil & Debbie Salas"
<dpsalas at tx.rr.com> wrote:

See below...

>"...Ditch the 43 foot vertical!  The 43 foot vertical craze is a joke, as
>you can see by the figures, Tom, W8JI, gives you in his post showing
>feedline loss and SWR...."
>
>With a 1:4 unun at the base of the antenna, the VSWR from 40-10 meters is 
>not bad - resulting in minimal coax losses.  However, the VSWR on 80 and 160 
>meters with or without the unun is terrible, and you should match the 
>antenna at the base on those bands.  See the "Articles" section at 
>www.ad5x.com for 160/80 meter matching ideas.
>
>Phil - AD5X 

But a 43 foot vertical is resonant at about 5.441MHz.  That is nowhere
near any ham band you could use on FD, except 6m using the tenth
harmonic.  Matching an antenna's feed point impedance doesn't change
it's point of resonance.

Any how, this thread is way off topic, since it's subject is not an
Elecraft product.  Those of you who want to continue this thread,
let's do it with direct emails instead of the reflector.

Tom, N5GE
Licensed since 1976
QCWA Life Member 35102

n5ge at n5ge.com
http://www.n5ge.com
http://www.swotrc.net

[snip]