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These are expensive for fiber glass. I would expect
carbon fibre for these prices.
I have one of these 10 metre German masts
and after several years one section of mine has split, so they are not that
robust, they are lightweight and convenient for /P use. Mine has been abroad to
the Algarve a few times CT1/G3KEV
De Mal/g3kev
----- Original Message -----
Sent: Wednesday, July 21, 2010 8:49
AM
Subject: Re: LF: Best way to connect
feedline - advice appreciated
Hello Andy,
Maybe you can try a even higher antenna
mast. I think there are some fiber carbon masts of 18m length. This could give
you even more efficiency and would be a more easy to handle arrangement that
the massive top load. You know, antenna height is the most important
parameter!
Oh, i found that link for a 18m and even a 26m mast!: http://www.wimo.com/cgi-bin/verteiler.pl?url="">
(scroll down)
A little expensive but you will definitely have a better
signal compared to 12m and the top load!
Good
luck!
Stefan/DK7FC
Am 21.07.2010 04:52, schrieb Andy -
KU4XR:
Hello all:
I will soon be finishing my re-construction of my lowFER antenna
to be used at 185 KHz. I will be using a different top hat design
from my previous antenna. I am not sure what would be the best way
to connect the feedline to the top hat, and down to the transmitter.
Photos of the new top hat are at:
http://ku4xr.webs.com/apps/photos/album?albumid=9558802
There are 24 horizontal wires, and 8 diagonal wires ( tensioners )
so 32 wires total in the top hat. The cross arms are 10 feet ( 3.3 m )
in length, and are grey electrical PVC ( UV resistant ).The vertical
pipe for the tensioning wires is 3 feet ( 1 m ).
The mast will be grey PVC, and a wooden " A " frame mounted against
the side of my aluminum sided mobile home,
(I know !! Not Good, but the best I can do)...
The loading coil ( Variometer ) is just inside the window at the
operating position...... Possibilities :::
#1 : A single wire, straight down the mast.
#2 : A single wire offset by about 1 foot, or more ?? to help
lessen the coupling effect.
#3 : Maybe a 2 wire downlead, spaced a given distance apart, and
offset from the mast also at a given distance, then tied together
for a single wire coming into the window at the loading coil.
Any ideas will be appreciated. This antenna will no longer be a
" one man job " it is going to be heavy, and will have to be guyed.
So, once my help is gone, I won't be able to raise, and lower this
antenna by myself like my previous one, so I need to do everything
the best possible while it is on the ground, and hope for the best
when it goes up in the air.
The top hat will be at 36 feet ( 12 m ) AGL, and the APEX will be
at 39 feet ( 13 m ) AGL.
Again, thank you for any suggestions, I'll consider all of them, and
then do the best I can do with the recomendations. Thank you for your
time, and 73 to all :
Andy - KU4XR - EM75xr - Friendsville, TN. USA
LOWfer Beacon " XR " @ 185.29875 KHz ( QRSS-60 )
*** Temporarily OFF, while constructing a new antenna ***
Coordinates: N: 35º 43' 54" - W: 84º 3' 16"
http://www.myspace.com/beaconxr
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