On 09/09/2010 11:05 AM, Mirko S57AD wrote:
> Some 40 years ago I've been in almost same situation, dwelling in huge
> mansion building with attic 50' * 33' (15m * 10m). I simply made bent
> dipole around the attic (nailed dipole wire to wooden beams), which
> performed pretty well for me (local rag-chewing on CW). I think it
> should work pretty well for you as well, with each side of dipole bent
> in 3 * 20' sides of squared U shape...
> -------------- ------------
> | |
> | |
> | |
> | |
> ----------------O-----------
>
> where O is feedpoint of dipole. (Drawing not in scale, of course, :-D )...
At the feed point, one can mount something like an LDG
auto-tuner. Those devices can handle a pretty high
SWR and will probably allow you to run the above antenna
on all the bands 80 and up.
In a 40x20 attic, you can probably fit about 110' of wire
by going around the edges as shown in Mirko's diagram.
--
All rights reversed.
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