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Satellite TV receivers & systems support forums
Fringe Reception General
Cooling the LNB
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<blockquote data-quote="Channel Hopper" data-source="post: 538918" data-attributes="member: 175144"><p>When I was doing tests back in the late 1990's we were using refridgeration components, which are certainly cheap (almost every town has a place where people dump old freezers). This was in the days when there were honest noise figures supplied by most manufacturers.</p><p></p><p>We were able to get a stable temperature of -32 C within the LNB casing from a standard freon jacket provided by a small tabletop freezer, giving the impression of a 40% gain in dish area (20% gain in dish size)</p><p>similar to upgrading from a 1.2 to a 1.5m reflector.</p><p></p><p>If you want a refined product though and are prepared to modify it for use with your satellite gear, then the following link from Denmark is probably the best one to go for.</p><p></p><p>_http://www.asetek.com/content/view/51/101/</p><p></p><p>Reports claim that the cooling can reach -40 C in the area surrounding the microprocessor in a PC cabinet, down from an ambient 15 C on a forced air system, which is quite impressive </p><p></p><p>The LNB doesn't produce heat like a microprocessor does, however additional shielding should be used deflect heat generated by the dish reflector in warmer climates. It is also adviseable to coat the finished LNB PCB in silicone, to prevent the condensation mucking up your hard work.</p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 538918, member: 175144"] When I was doing tests back in the late 1990's we were using refridgeration components, which are certainly cheap (almost every town has a place where people dump old freezers). This was in the days when there were honest noise figures supplied by most manufacturers. We were able to get a stable temperature of -32 C within the LNB casing from a standard freon jacket provided by a small tabletop freezer, giving the impression of a 40% gain in dish area (20% gain in dish size) similar to upgrading from a 1.2 to a 1.5m reflector. If you want a refined product though and are prepared to modify it for use with your satellite gear, then the following link from Denmark is probably the best one to go for. _http://www.asetek.com/content/view/51/101/ Reports claim that the cooling can reach -40 C in the area surrounding the microprocessor in a PC cabinet, down from an ambient 15 C on a forced air system, which is quite impressive The LNB doesn't produce heat like a microprocessor does, however additional shielding should be used deflect heat generated by the dish reflector in warmer climates. It is also adviseable to coat the finished LNB PCB in silicone, to prevent the condensation mucking up your hard work. [/QUOTE]
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Fringe Reception General
Cooling the LNB
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