GrahamH's photos with the keyword: tunnel 4

201301BorderRangesQld 011

201301BorderRangesQld 011

GrahamH
17 Jan 2013 171
Border Tunnel 4 showing the feed to the tunnel's leaky co-ax.
201301BorderRangesQld 010

201301BorderRangesQld 010

GrahamH
17 Jan 2013 184
Border Tunnel 4 showing hut, mast and feed to the tunnel's leaky co-ax.
201301BorderRangesQld 008

201301BorderRangesQld 008

GrahamH
17 Jan 2013 40
Border Tunnel 4 Train Radio site. January 2013.
201301BorderRangesQld 012

201301BorderRangesQld 012

GrahamH
17 Jan 2013 1 78
Apparently a radio link has replaced the original landline for comms back to Train Control. January 2013.
201301BorderRangesQld 006

201301BorderRangesQld 006

GrahamH
17 Jan 2013 181
Border Tunnel 4 showing hut and mast. Sometime since construction the landline link has been replaced with a radio circuit. The UHF yagi antenna, I guess, is using the fixed point service variant of the Telstra 3G mobile system.