Notice to Mariners 2017
8/2/17 Temporary Beacon in position
Douglas Head Scenic View (2003)
Douglas Head from the sea (2003)
Old Engine Room_________Tower and Private Residence
Douglas Head Station (2002)
Control Panel (2004)__________________ Sealed Beam Lamp Array (2004)
The metal panels in front of the lamps are called collimators,whose purpose is to give a sharper more defined flash.
RLK or Technicians view when changing lamps (2011)
Circuit of sealed beam lamps (2004)___________AGA PRB21--Gearless Drive Unit (2004)
Two double banked units of 12 lamps mounted facing in opposite directions,turned by an AGA PRB21 Gearless Drive Unit rotating at 3 rpm,gives a flash every 10 seconds.|
Only 8 of the lamps (30 Volt 200 Watt) run at 25 Volt 150 Watts to give increased service life are used in normal operation 4 in each bank are 6 Volt 28.5 Watts used as emergency lamps (Loss of mains electric power or complete failure of main lamp banks)
Corresponding lamps (4) in each bank are connected in series,if one lamp fails all four go out,which gives each unit the same intensity,similarly with the 6 volt lamps,two connected in series.Power provided by emergency batteries.
Operation of the light is monitored at Northern Lighthouse Board Monitoring Center.
Attendant visits on a fortnightly basis carry's out system checks and checks physical condition of building.
All photographs Copyright Fred Fox.