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DISH SETUP: Single sat, Multi-Sat & Motorised
The Precision Antennas 2.8m Dish Project (S4C Auction)
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<blockquote data-quote="uhf-satcom.com" data-source="post: 1115570" data-attributes="member: 403456"><p>I need to make a suitable feed holder, currently thinking of something like 8 to 12" ally pipe about 4-6" long, then other pipe that can fit inside that. Each will have a stop to ensure the phase center is correct for the band in choice. I will adapt my existing set of feeds so they are easily swap-able. Current plan is to get 8.4GHz / 7.5GHz stuff done first for sun noise tests, then 10GHz EME transceiver, followed by the misc bands like Ku, C, S, L, UHF etc. Just need time as always ;-)</p><p></p><p>I reckon the round arrangement would work well because it allows easy rotation of the feed which is important with linear stuff like 10GHz EME. Pretty much everything else is circular pol.</p><p></p><p>The counterweights are just a quick test. The plan is to make two triangular arms from the back frame that has the 2 down-converter boxes on it. These will extend to the centreline of the AZ/EL head and the counter weights will be mounted there, as they are they will hit the rain cover on the controller if I move in AZ to about 280deg (must remember not to do that). The AZ/El head does have a lot of torque, a friend of mine who has the same unit bent the internal 1" steel EL drive shaft due to driving it into the end stop because the micro-switch limit didnt trigger...</p><p></p><p>I'll upload more photos as I get on with the job too.</p></blockquote><p></p>
[QUOTE="uhf-satcom.com, post: 1115570, member: 403456"] I need to make a suitable feed holder, currently thinking of something like 8 to 12" ally pipe about 4-6" long, then other pipe that can fit inside that. Each will have a stop to ensure the phase center is correct for the band in choice. I will adapt my existing set of feeds so they are easily swap-able. Current plan is to get 8.4GHz / 7.5GHz stuff done first for sun noise tests, then 10GHz EME transceiver, followed by the misc bands like Ku, C, S, L, UHF etc. Just need time as always ;-) I reckon the round arrangement would work well because it allows easy rotation of the feed which is important with linear stuff like 10GHz EME. Pretty much everything else is circular pol. The counterweights are just a quick test. The plan is to make two triangular arms from the back frame that has the 2 down-converter boxes on it. These will extend to the centreline of the AZ/EL head and the counter weights will be mounted there, as they are they will hit the rain cover on the controller if I move in AZ to about 280deg (must remember not to do that). The AZ/El head does have a lot of torque, a friend of mine who has the same unit bent the internal 1" steel EL drive shaft due to driving it into the end stop because the micro-switch limit didnt trigger... I'll upload more photos as I get on with the job too. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
The Precision Antennas 2.8m Dish Project (S4C Auction)
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