08./08/2005 0852z
Hello all LFer,
Some years ago for a cardïod vertical antenna system on 7MHz i have used
old windsurfer masts with success. You can easy find broken masts,
not expensive; 10 meters high mast are easy to errect.
73: Jeff / F6CWN
----- Original Message -----
From: "Mike Dennison" <[email protected]>
To: <[email protected]>
Sent: Monday, August 08, 2005 7:27 AM
Subject: Re: LF: 136 khz acty Sunday
> I bought one of those DK9SQ telescoping masts a couple of years ago.
> Yes, its very light but also very weak The top section is maybe 1/4"
> diameter. I was able to (just barely) get it to hold up a 75m dipole
> made up of #20 insulated wire fed with 300 ohm tv twin lead, I used
> fishing line instead of rope at the dipole ends. I used the mast as
> a center support, and it still bent a bit under the weight of the
> very light dipole. Also, there is no locking mechanism on the
> telescoping sections, to prevent it from collapsing on itself I had
> to put a piece of tape accross each of the lower sections.
> 73 Warren K2ORS/WD2XGJ
I had exactly the same experience with mine, though it was useful
when operating occasional LF portable. When I used it at home, my
neighbours didn't like it because it was so unstable in the slightest
wind.
I still keep it handy, though, as it makes a very lightweight 25ft
extension to my arm when I need to disentangle branches from the
antenna after a storm.
Mike, G3XDV
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