Generally conduit is not used as they tend to hold water and it is not desirable to have RF cables constantly immersed. However in certain instances conduit has been used.
Good question. The 1/4" are for the monitor returns. This is a Selex system so they are used for CRS CSB, CRS SBO, CLR 1, and CLR 2 from the combining unit back to a monitor detection unit in the facility shelter.
@@ArtofNAVAIDs Thanks for the reply. I install and repair/refurbish the LOC and GS on Thales/Wilcox Mark-1DEF, Mark-20/20A and ILS 420 systems. I have worked on the old ASII 1100 series ILS systems which is now Selex 2100 series - upgraded. The ILS420 has the same type monitoring signal return instead of the comm cable with integral detectors as used on the Mk-1 and Mk-20 series LOCs.
My preference would be to put all the cable in 4 - 4" conduit the whole way which has been done in some locations for reasons unknown. Direct bury is a long held practice in our organization though. The biggest debate is the conduit holding water but in my opinion I don't see it as a problem with this cable and never have. Conduit certainly makes replacing cables easier.
Absolutely Fantastic video! I felt like I was there again. Appreciate the planning you put in.
Generally conduit is not used as they tend to hold water and it is not desirable to have RF cables constantly immersed. However in certain instances conduit has been used.
What's the 1/4" Heliax for? We usually run 6 1/2" Heliax cables for a localizer - CSE CSB, CSE SBO, CLR CSB, CLR SBO and 2 spares.
Good question. The 1/4" are for the monitor returns. This is a Selex system so they are used for CRS CSB, CRS SBO, CLR 1, and CLR 2 from the combining unit back to a monitor detection unit in the facility shelter.
@@ArtofNAVAIDs Thanks for the reply. I install and repair/refurbish the LOC and GS on Thales/Wilcox Mark-1DEF, Mark-20/20A and ILS 420 systems. I have worked on the old ASII 1100 series ILS systems which is now Selex 2100 series - upgraded. The ILS420 has the same type monitoring signal return instead of the comm cable with integral detectors as used on the Mk-1 and Mk-20 series LOCs.
Great job. I have a question though, do you ever use conduit to protect the cables?
My preference would be to put all the cable in 4 - 4" conduit the whole way which has been done in some locations for reasons unknown. Direct bury is a long held practice in our organization though. The biggest debate is the conduit holding water but in my opinion I don't see it as a problem with this cable and never have. Conduit certainly makes replacing cables easier.