Healy Mt. Repeater

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Healy Mt.(63N52.69', 148W51.29', elevation 998 meters, GPS) near Healy MP 249 Parks Highway Installed May 1994 by KL7XO & AL7FQ
		Left: Community Repeater Shack. KL7KC repeater antennes, Diamond X-50A for two-meters and Cushcraft 224WB for the 223 Mhz link, are on tower to the left of building. AL7FQ is stringing up coax. Right:TV translator antennas and surrounding country side.
		Left: Looking west. The Parks Highway south to north goes left to right through the center of photo. Right: Inside of shack.

223 MHz Link - Path Profile
	Above: Path profile, Ester Dome to Healy. (already loaded)
	Left: Map showing path between Healy and Ester Dome BIG FILE: 527x1637 pixels, 335K bytes not yet loaded.

223 MHz Link - Path Loss Calculation
Elevation antenna A	720	(m)	Ester Dome
Elevation antenna B	998	(m)	Healy
Elevation obstruction	853	(m)	Tota
Distance A to B	124	(km)	Ester Dome to Healy.
Distance A to obstruction	89	(km)	Ester Dome to Healy Mt.
frequency	224.88	(MHz)
Theta	0.0047	rad
V	0.90
defraction loss	13.45	dB
free space loss	121.37	dB	Ester Dome to Healy Mt.
TOTAL PATH LOSS	134.83	dB	defraction + free space

223 MHz Link - Fade Margin Calculation
Tx power	8.00	watts	Ester Dome
Tx power	39.03	dBm	Ester Dome
tx coax	-1.75	dB	50'*3.5dB/100'
tx ant gain	5.15	dBi	AEA Isople *
rx ant gain	7.20	dBi	224WB 4ele Yagi
rx coax	-1.75	dB	50'*3.5dB/100'
system gain	47.88	dBm
TOTAL PATH LOSS	134.83	dB	from above
rx sens	-110.00	dBm	(20dB S+N/N)
FADE MARGIN	23.05	dB	rx sens + system gain - path loss 10dB for 90% reliablity 20dB for 99% reliablity 30dB for 99.9% reliablity 40dB for 99.99% reliablity

* There is no published gain for the AEA Isopole antenna. A reasonable estimate would be 3db more than a dipole. This is 5.15 dbi