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Satellite Systems - What to Buy - What to install
Norsat 4108CF Ku band LNB
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<blockquote data-quote="moonbase" data-source="post: 943317" data-attributes="member: 178786"><p>Martin,</p><p></p><p>The Primesat feedhorn looks very similar to a Chaparral orthomode dual C band feed and looks to be OK.</p><p></p><p>Were you considering buying the unit with the 2 C band LNB's included (£199.85p) or without the two C band LNB's (£79.95p)? Reading the SSS description, they do not provide detailed specification figures for the LNB's that are supplied in the inclusive package. However, the LNB's are listed at £69.95p each elsewhere on the SSS website but it still does not state if they are DRO or PLL.</p><p></p><p>You need to check if the LNB's require 18 volts, if they do then you will need a power inserter to get 18 volts to the LNB for Vertical polarity as the receiver will be sending 13 volts. If the LNB's do not require 18 volts then you do not need the power inserter.</p><p></p><p>If you only buy the feedhorn without the LNB's and purchase Norsat PLL LNB's separately then you will need a power inserter to send 18 volts to the Norsat LNB's.</p><p></p><p>Finally, for circular polarisation you will need to insert an appropriately sized dielectric plate into the throat of the feed. A high proportion of the C band arc visible to a UK location is circular polarity although there are some linear polarised signals. It might be best to check with SSS if a dielectric plate is included, or talk them into chucking a few in as freebies.</p><p></p><p>Rgds</p></blockquote><p></p>
[QUOTE="moonbase, post: 943317, member: 178786"] Martin, The Primesat feedhorn looks very similar to a Chaparral orthomode dual C band feed and looks to be OK. Were you considering buying the unit with the 2 C band LNB's included (£199.85p) or without the two C band LNB's (£79.95p)? Reading the SSS description, they do not provide detailed specification figures for the LNB's that are supplied in the inclusive package. However, the LNB's are listed at £69.95p each elsewhere on the SSS website but it still does not state if they are DRO or PLL. You need to check if the LNB's require 18 volts, if they do then you will need a power inserter to get 18 volts to the LNB for Vertical polarity as the receiver will be sending 13 volts. If the LNB's do not require 18 volts then you do not need the power inserter. If you only buy the feedhorn without the LNB's and purchase Norsat PLL LNB's separately then you will need a power inserter to send 18 volts to the Norsat LNB's. Finally, for circular polarisation you will need to insert an appropriately sized dielectric plate into the throat of the feed. A high proportion of the C band arc visible to a UK location is circular polarity although there are some linear polarised signals. It might be best to check with SSS if a dielectric plate is included, or talk them into chucking a few in as freebies. Rgds [/QUOTE]
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Satellite Systems - What to Buy - What to install
Norsat 4108CF Ku band LNB
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