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All linked repeaters share the features of the Hub including automated (S.A.M.E.) weather alerts, NOAA WX radio on demand, triangle area autopatch, telephone interconnect link and the IRLP Node 4270. The proposed repeaters are also shown on this general location map by an X.

The 441.725 serves as the Linking Hub for all of the UHF repeaters in the KD4RAA-K4JDR link system. It is located near the NC State Fairgrounds on a 360 foot tower at the 320 foot Northeast level and serves as IRLP Node 4270, it has SAME WX alert and has emergency backup as well as local autopatch. Below is a propagation by terrain module of the Hub.

This is a talk out propagation coverage map for the 441.725 that was done by Todd Ellis, N2XL of Booth & Associates, Inc. in Raleigh. This indicates propagation with a terrain module without any account of obstructions from the tower, buildings, trees and other obstacles. The largest factor is the Southwest tower shading from the antenna being mounted on the Northeast side. The areas effected are in the direction of Fuquay-Varina from Raleigh. The coverage details are not viewable from a this jpg file like it is directly from the software.

The Diamond X-500 antenna is side mounted 24 inches out at 135 degrees SE on a Rhon 25G at a height of 172 feet to the base. The terrain is at 294 Ft. ASL The repeater is nulled to the Northwest as the other Raleigh/Cary local repeaters provide coverage in this area. Portable coverage should be around 7 to 10 miles and mobile coverage around 20-30 miles with a total estimated coverage area around 1500 Square Miles around Clayton.

This is a talk out propagation coverage map for the 444.150 that was done by Todd Ellis, N2XL of Booth & Associates, Inc. in Raleigh. This indicates propagation with a terrain module without any account of obstructions from the tower, buildings, trees and other obstacles. The largest factor is the Northwest tower shading from the antenna being mounted on the Southeast side. The areas affected are in the direction of Raleigh/Cary. The coverage details are not viewable from a this bmp file like it is directly from the software. I have found this to be fairly accurate south and east.

The 444.775 repeater is located at 601 Kildaire Farm Road at the intersection of Pleasants Avenue. The water tank and communications building sits on ridge at 508 ft. above sea level which is the second highest elevation area in Wake County. The repeaters coverage is nulled to the south due to its location on the northwest side of the tower. It has consistent mobile coverage on I - 40 at Hillsboro to the east at Exit 312, HWY 42 in Johnston County. The Clayton 444.150 repeater will cover all of Johnston County and Holly Springs will take up the nulled area in its direction.

This is a talk out propagation coverage map for the 444.775 that was done by Todd Ellis, N2XL of Booth & Associates, Inc. in Raleigh. This indicates propagation with a terrain module without any account of obstructions from the tower, buildings, trees and other obstacles. The largest factor is the Northwest tower shading from the antenna being mounted on the Northwest side. The areas affected are in the direction of Holly Springs/Willow Springs. The coverage details are not viewable from a this jpg file like it is directly from the software. I have found this to be fairly accurate North to Southwest. Mobile coverage using a 5db gain antenna is @ 32 miles out to the Northwest and 22 miles to the Southeast. Portable coverage is within the Cary City limits around 7 miles out. Estimated land area coverage is @ 1,950 square miles mobile and 135 square miles portable.

This is a talk out propagation coverage map for the KF4AUF, 444.325 that was done by Todd Ellis, N2XL of Booth & Associates, Inc. in Raleigh. This indicates propagation with a terrain module without any account of obstructions from the tower, buildings, trees and other obstacles. Mobile coverage in an omni configuration is @ 20 to 25 miles out using a 35 Watt mobile with a 5db antenna gain and covers @ 1,250 square miles of land area. Portable 4 watt coverage is @ 6 miles out and covers @ 110 square miles. This increased our Southwest coverage dramatically because of our other repeaters tower shading and topography.

The 146.775 KD4RAA repeater is located on the same tower as the 441.725 K4JDR Hub Repeater. Due to the radiation patterns of 2 meters over 70 centimeters, the 146.775 machine propagates slightly further that its sister UHF repeater at the same location. It is now connected fulltime to the Internet Radio Linking Project as Raleigh Node 4260 and normally stays parked on a IRLP Reflector with high volume radio traffic.

This is a talk out propagation coverage map for 146.775 that was done by Todd Ellis, N2XL of Booth & Associates, Inc. in Raleigh. This indicates propagation with a terrain module without any account of obstructions from the tower, buildings, trees and other obstacles. The largest factor is the Southwest tower shading from the antenna being mounted on the Northeast side. The areas affected are in the direction of Fuquay-Varina from Raleigh. 45 Watt + fixed stations with good antenna systems in this area should not have any problems accessing the repeater.

This is a projected coverage area of the Morehead City repeater. It was placed on the air under test mode December 28, 2002. The test frequency is 444.825 + 100 PL. It also has a VoIP Link on IRLP Node 4554. It should cover 8 miles handheld and 30 miles mobile reaching to Sneads Ferry, Jacksonville, New Bern and Oriental on the fringe.