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Satellite TV receivers & systems support forums
Fringe Reception General
Cooling the LNB
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<blockquote data-quote="guest poster" data-source="post: 542532" data-attributes="member: 262401"><p>How do you vent condensation at minus 30C? I think before you said use </p><p>silicone to seal it from condensation...... I liked that, or using another sealant material.</p><p></p><p>Venting would increase condensation and freezing on the LNB ... if it was working at minus 30C then all moisture in passing air would want to condensate on it and then freeze to the point where you should end up with a block of ice where the LNB was (that might be OK if the LNB's PCB is protected from moisture).</p><p></p><p>If you can get it to minus 30C with a butchered domestic freezer, some of the things we came up with when looking at the practicalities of this were running costs, lagging, strengthening the LNB arms and using a thermostat.</p><p></p><p>If you lag it and seal it at the same time, the actual moisture available to condensate could be almost completely removed. With good lagging, the actual energy needed could be greatly reduced and the efficiency could be increased and with a stat you could turn it up and down or off depending on the particular satellite (hmm like a super charger) but if it were off, with the lagging it might mean that it actually gets hotter than normal and may need a bit of cooling.</p><p></p><p></p><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool :cool:" loading="lazy" data-shortname=":cool:" /></p></blockquote><p></p>
[QUOTE="guest poster, post: 542532, member: 262401"] How do you vent condensation at minus 30C? I think before you said use silicone to seal it from condensation...... I liked that, or using another sealant material. Venting would increase condensation and freezing on the LNB ... if it was working at minus 30C then all moisture in passing air would want to condensate on it and then freeze to the point where you should end up with a block of ice where the LNB was (that might be OK if the LNB's PCB is protected from moisture). If you can get it to minus 30C with a butchered domestic freezer, some of the things we came up with when looking at the practicalities of this were running costs, lagging, strengthening the LNB arms and using a thermostat. If you lag it and seal it at the same time, the actual moisture available to condensate could be almost completely removed. With good lagging, the actual energy needed could be greatly reduced and the efficiency could be increased and with a stat you could turn it up and down or off depending on the particular satellite (hmm like a super charger) but if it were off, with the lagging it might mean that it actually gets hotter than normal and may need a bit of cooling. :cool: [/QUOTE]
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Fringe Reception General
Cooling the LNB
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