Repeaters on  the Link System             UNDER CONSTRUCTION 

441.725 (Backbone Hub) West Raleigh, NC K4JDR Linking Repeater VXR 5000U Vertex		The K4JDR Backbone Hub Repeater consists of a commercial Vertex VXR 5000 with a Pacific Research, RI-310 Controller v2.11 including a 120 minute DVR, and AD-3 audio delay board @ 62.5ms delay.  The Repeater is presently Running a Henry UHF Amplifier at 85 Watts out of the duplexer with .10 watts reflected ( 1 : 1 ) VSWR. The antenna at 320 Feet AGL. The site is 468 Feet ASL.  DB-4070 BP/BR duplexor cavities DCI Band Pass Filters are used on the link radios and repeaters to filter out other services outside the Amateur Bands. Click here to View Graph 1 and View Graph 2  RFI Surge Suppressor Sentry RFI Surge Power strip Astron RS-50BB, 12 V Power Supply.		Polyphaser IS-50NX Surge ArrestorEAR #5120 Weather Radio (SAME)                                                    Decibel, DB4001-1 band pass filter cavity for 162.450mhz Home Brew WX interface and modifications Home Brew, 90 sec. WX Broadcast Circuit Home Brew, Wx Radio, Reset Circuit Home Brew, VHF 1/4 wave Weather Radio Antenna Home Brew, Notch, 1/2 wave stub filter. 6 Ft. 19 inch Repeater Rack Assembly
Communications Building at the 441.725 Hub and 444.675 site in Raleigh				T
A look into the Building, the 725 Hub and 675 is on the left at the end.		A shot of the 360 ft. Tower		Rob Noble, a Cary Firefighter and tower rigger for Nav-Com Communications, climbing the Raleigh Hub repeater tower inspecting cables and removing a UHF link antenna.

If you are interested in my field notes which contain many schematics and information on the equipment and addition items I had to build, please click Field Notes here or on the side bar and visit our Yahoo site for schematics.  The notes are in a PDF or jpeg format so you will need Adobe Acrobat Reader available at Adobe's web site.