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jb66 · 04-12-2012, 16:00

When you have a long cable run RG11 is more effective than an HDU as the high frequency signals will be very low.

HDUs are mostly used in sid architecture where there are a set of taps every 20m. If your close to the amp there will be a 26db attenuated tap to lower the downstream, unfortunatly the upstream will also be attenuated by 26db so will be high. Its common for the upstream to be 47db from the pit in those situations. Add a 3 way splitter and a few connectors and the upstream rises above 55db.

04-12-2012, 16:00	#9
jb66 cf.mega poster Join Date: Aug 2009 Posts: 5,386	Re: HDU installed, problems since. When you have a long cable run RG11 is more effective than an HDU as the high frequency signals will be very low. HDUs are mostly used in sid architecture where there are a set of taps every 20m. If your close to the amp there will be a 26db attenuated tap to lower the downstream, unfortunatly the upstream will also be attenuated by 26db so will be high. Its common for the upstream to be 47db from the pit in those situations. Add a 3 way splitter and a few connectors and the upstream rises above 55db.