[Elecraft] Coax Loss Figures

[Radio Amateur N5GE]

On Wed, 23 Jun 2010 00:19:03 -0700, Brett Howard
<brett at livecomputers.com> wrote:

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.

During FD you are going to get most of your points from QSO's within
the U.S.A., so put up a 40m ground plane at eight feet on a 4X4 wooden
post in a two foot hole with 4 radials (you can use the radials to guy
the wooden post).  40m is a good band for day and night and is only 32
feet or so tall plus eight feet of post.  By doing this you will have
a resonant antenna that will cover 360 degrees at ranges within the
U.S.A.

Adjust the length of your 43 ft vertical by removing the top ten feet
and adjusting it for the end of 40m that you are going to work or set
it in the middle of the band and attach it to the post.

Tom, N5GE
Licensed since 1976
QCWA Life Member 35102

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

>Yea I know I'm going way overkill and I was doing all the calculations
>by hand of total loss and at a 7:1 SWR (which is entirely possible on
>this 43 ft vertical) the loss at 30Mhz can get kinda ugly... I've not
>modeled it fully but on all bands but on 20 meters its 7:1 and on 40
>meters its 3:1...  
[snip]