[TowerTalk] Dipole Centre - Proximity To Metal Mast

[Jim Martin - MM0BQI]

Thanks for all the replies.
The centre will now be fixed to the metal mast which will indeed raise the 
ends further from the metal supports.  A win-win situation!  Less coupling 
into the neighbours TV/audio and hopefully a better signal by getting the 
antenna clear of the roof.
Maybe even 3Y on 80m?... you have to dream!
73 and thanks again
Jim

----- Original Message ----- 
From: "Jim Martin - MM0BQI" <MM0BQI at blueyonder.co.uk>
To: <TowerTalk at contesting.com>
Sent: Monday, January 30, 2006 11:26 PM
Subject: [TowerTalk] Dipole Centre - Proximity To Metal Mast


>I have a small garden and just manage to squeeze a 40/80 loaded dipole from 
>the roof to the fence.  The centre of the dipole is currently unsupported 
>six feet above the flat roof and I would like to increase this to about 
>fifteen feet by supporting the centre with a fifteen foot metal mast.  Can 
>I secure the dipole centre directly to the metal mast (2 inch diam pole) or 
>should I use some form of insulated stand off?  The dipole ends are only a 
>foot from the metal end supports, will this be having a detrimental effect 
>on performance?
> With this sort of compromise you need to squeeze every bit of advantage 
> where you can so your comments and advice on what is actually worthwhile 
> doing would be appreciated.
> Thanks
> Jim,  MM0BQI
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