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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
My Channel Master 1.8 project.
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<blockquote data-quote="moonbase" data-source="post: 1128629" data-attributes="member: 178786"><p>Congratulations, if you are getting a borderline lock on ESPN from 40.5W with the C138 LNBF as shipped you can expect to improve things with tweaking.</p><p>A polo pipe or the breadboard T plate will get you boosted into a stable lock. Tweaking with the LNBF/Scalar pairing will get some more boost and possibly some from Az/El alignment.</p><p></p><p>Well done, you have stuck with it and achieved the 40.5E ESPN lock with a small dish, a feat to be proud of considering it is your first venture into C-Band.</p><p></p><p>I have attached below the feed-scalar pair table I compiled for 40.5 West some time ago.</p><p>For three of the four frequencies I sampled, the best signal levels were achieved with the feed opening aperture between 5mm and 10mm inside the focal length.</p><p>However, these readings were for a prime focus dish with a flat scalar and not an offset dish with a hooded scalar so I am not sure how applicable they are to your case?</p><p></p><p>.</p><p>[ATTACH=full]141870[/ATTACH]</p></blockquote><p></p>
[QUOTE="moonbase, post: 1128629, member: 178786"] Congratulations, if you are getting a borderline lock on ESPN from 40.5W with the C138 LNBF as shipped you can expect to improve things with tweaking. A polo pipe or the breadboard T plate will get you boosted into a stable lock. Tweaking with the LNBF/Scalar pairing will get some more boost and possibly some from Az/El alignment. Well done, you have stuck with it and achieved the 40.5E ESPN lock with a small dish, a feat to be proud of considering it is your first venture into C-Band. I have attached below the feed-scalar pair table I compiled for 40.5 West some time ago. For three of the four frequencies I sampled, the best signal levels were achieved with the feed opening aperture between 5mm and 10mm inside the focal length. However, these readings were for a prime focus dish with a flat scalar and not an offset dish with a hooded scalar so I am not sure how applicable they are to your case? . [ATTACH type="full" alt="40.5W_Scalar_Feed_Pairs.jpg"]141870[/ATTACH] [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
My Channel Master 1.8 project.
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