Carolina 440 UHF Link System and IRLP summary
 

The K4JDR, 441.725 +100 PL is the Backbone Hub for the UHF Link System and  IRLP, its controller is what supports the auto patch and other advanced functions for the Carolina 440 UHF Link System. It is located on a tower just west of the Fairgrounds on Chapel Hill Rd. near the City of Raleigh water tank. The antenna pattern is northeast.  View the www.carolina440.net  web page for repeater details and pictures of the UHF Link system. This system is what we call our Voice Interoperability System for Amateur Radio, VISAR.  More about the VISAR system can be viewed at http://www.carolina440.net/VISAR.htm .

The list below indicates the repeaters and their geographical location to guide you on what repeater would be best for you based on your location. All of the auto patch and IRLP functions can be used from any repeater on the link.  The S-meter is only receiving your signal if you are on the 441.725 Hub otherwise it will be the link radio from the other repeaters on the link to the Hub. When located around the Fairgrounds or in areas east of Raleigh where the other repeaters in the link are marginal, you may use the backbone repeater just as any other repeater. When possible, please use the repeaters on the link when in their coverage area to utilize the system.  Each one has a unique footprint of coverage. Hub frequencies are generally not given to users or published since they are link frequencies, but we have made an exception with our system due to some features that can be used and while the repeaters on the links are under construction.

On the Carolina 440 UHF Link System  as of December  2006 
IRLP Node 4270  &  EchoLink Node 42704

444.150+ 100 PL    K4JDR, Clayton, NC ( Antenna pattern Southeast)
444.325+ 100 PL    KF4AUF, Holly Springs, NC (omni pattern)
444.375+ 100 PL    KB4WGA, Henderson, NC ( Antenna pattern Northeast )
444.550+ 100 PL    K4JDR, Coats, NC (Southwest pattern)
444.775+ 100 PL    K4JDR, Cary, NC ( Antenna pattern Northwest )
444.875+ 100 PL    KD4RAA  Wendell, NC (Antenna pattern omni)
444.925+ 100 PL    KB4WGA, Durham, NC ( Antenna pattern West )
444.025+ 100 PL    WX4NC, Smithfield, NC (Antenna pattern west)

Coming in the future on the full time Link 

442.775+ 100 PL       K4JDR, Seven Springs, NC (Southwest pattern)  
443.450+ 100 PL       KD4RAA, Snow Camp/Cane Mt. , NC (Antenna pattern Northeast)
444.275+ 131.8 PL    NC4BJ, Pineview/Spring Lake, NC (Antenna pattern NW-SE)
444.650+ 100 PL       KG4EDW, Middlesex, NC (Antenna pattern Southeast)


Printable list available at:    http://www.carolina440.net/repeaters_on_link.htm 

General Coverage Map at:   http://www.carolina440.net/images/uhf_cov.jpg 

IRLP VHF Repeater
IRLP Node 4260, High Volume QSO Reflector connections, VoIP Skywarn 
146.775 - 88.5 PL KD4RAA

IRLP UHF Repeater
IRLP Node 5270, Point to Point Linking, testing
444.675 + 100.0 PL  KD4RAA, Raleigh-Fairgrounds
(Stand-alone repeater and IRLP node)   

IRLP East Coast/Raleigh Reflector 921
IRLP Node 9210, Designated as N.C. Emergency Reflector, 
IRLP-SkyWarn Net Reflector  (Nets at 00:00 UTC Saturdays)
Channel Assignments:  http://www.kd4raa.net/reflector_9210_channel_assignmen.htm  
WA0ERX, RTP, (Bandwidth Provided by Inflow).

IRLP UHF Simplex Node   
IRLP Node 4104 WW4M, Point to Point Linking, 
IRLP Admin Testing and Technical Support, Backup Node with frequency agile link.
Can be placed on any repeater for Emergency Response.
Normally on 446.150 Simplex 100.0 PL  at KD4RAA shop.

Echolink Repeaters

Carolina 440 Link System 441.725+ 100 PL

W4ATC  442.675 +  100 PL

KD4RAA 444.675 + 100 PL  
Normally on IRLP Node 4340 but can be placed in Echolink - IRLP link mode
for Emergency Response.

IRLP Linked Repeaters