Having a structural "fuse" is a good idea, assuming the consequences of the
fuse blowing are acceptable. I've thought about the pin/socket scheme, but
always worried about it getting stuck.
On Jan 15, 2011, at 8:01 AM, "Clint Talmadge W5CPT" <w5cpt@bellsouth.net> wrote:
> There has been some discussion here on the reflector about the strength of
> the pipe/tube to mount a vertical. It occurs to me that I may not want a
> very strong pipe/tubes as a mount.
>
>
>
> Years ago I dug a hole about 3 feet deep and buried a piece of 2" thick
> walled PVC and cemented it in so that the top is just flush with the lawn.
> Over the year in this I have a used: a thin walled aluminum pipe, a piece of
> aluminum 2" X .25" wall mast (from Texas Towers) as well as a piece of thin
> walled galvanized steel tube (from a support on a store display).
>
>
>
> The first failure I had was the thin wall steel tube. But I think it became
> a sacrificial element, as when it failed the HF6V did not even reach the
> ground and had no damage at all. The second failure was the thin walled
> aluminum tube. It allowed my KU4AB 6M loop to touch the ground but other
> than being a little tweaked, was not damaged.
>
>
>
> So I think I will defy conventional wisdom and stay with thin walled tube to
> mount my various experiments.
>
>
>
> Clint Talmadge - W5CPT
>
>
>
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