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Re: Using C band polar mounts w/ ao-40



What is the theoretical gain of my "six" foot mesh TVRO dish at 2.4Ghz?
Beamwidth? Links to equations/tables/shareware dish calculators
will be welcomed!

Vince Risalvato
KD7AI


> Tony, Art:
>
> Any roughness in the dish surface becomes less important as frequency
> drops.  Many newer c-band TVRO dishes are rated for ku-band as well, so
> depending on the individual dish mfr and model [and age], I think there is
> little concern for use at either 1.2 or 2.4G.  As far as gain, a 3m
> [ten-foot] dish will provide 12 dB more gain than a 2-foot dish, 10 dB more
> than a bbq grill dish, and much-much more than most helical beams.  At 2400
> a ten-foot dish will show 36 dBi and a bw of 3 degrees; at 1269 gain is 30
> dBi, bw 6 degrees.
>
> If I had an equatorial mount TVRO dish I would definitely try it [I have a
> 33 inch ku-band fixed dish, and a 2.5m az-el dish with drive not in
service].
>
> Ed
>
>
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