[Wswss] [VHF] 1296 dish

[Len Gwinn]

I would like to say THANK YOU to all that replied with information and 
ideas.

I can not ""bird-bath"" the dish at this time.   No elevation and the 
location next to the house does not allow it.  Maybe I need to find another 
location !!  It appears as tho one/half inch screen of some type is the best 
choice with one inch a second choice.  It also appears as tho I had better 
watch the layout--horizontal/vertical--of the screening to keep the dish 
working at its best, altho that may not be so critical.

Trees prevent me from a good location for the moon at this time so may just 
stay on the horizon.

Again, thanks all for the help.

73  Len  WA6KLK  CM89hi

----- Original Message ----- 
From: "Len Gwinn" <compmtn at instawave.net>
To: <wswss at mailman.qth.net>; "PNWVHFS" <pnwvhfs at googlegroups.com>; 
<vhf at w6yx.stanford.edu>
Sent: Sunday, September 06, 2009 6:02 PM
Subject: [VHF] 1296 dish


> Hi all,
>
> I have been using a 10 foot TVRO dish on 1296.  It works great BUT BUT,  I
> have a question.
>
> Situation.---The dish presently has small spaced wire mesh for its 
> surface.
> OK, that is smooth.  BUT when I get high winds it is more like a solid 
> surface
> I have been told.  I am getting some structure damage from the high wind
> vibration where the dish is braced back into the house at the center of 
> the
> dish.  I have tried turning the dish sideways into the wind but no change 
> in
> conditions.  Wind in the winter runs up to 70 mph  !!
>
> Question---How much do I lose in gain--if at all--if I change the dish 
> surface
> to half inch hardware cloth/wire/screen,   OR to one inch similiar 
> material???
> This should greatly cut down any vibration/acting like a solid dish ie, 
> wind
> load would be much much less.  Does this also maybe allow more power to go
> thru the dish thus affecting anyone behind the dish  ???
>
> I am planning on moving up to 300 watts output to the dish and would 
> rather
> use the dish than a 22 element beam !!!
>
> Any ideas or help  ?? or places to go read about it  ??
>
> Thanks
>
> Len  WA6KLK
> ------
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