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Madera County Amateur Radio Club

2-Meter Repeater Technical Information



LOCATION: Deadwood Peak. Two miles east of Oakhurst, north of highway 41 and 38 miles north of Fresno. Lat. 37 17 55 Long. 119 41 04


ELEVATION: 4540 ft.


REPEATER NORMAL MODE: Carrier (any on frequency signal will activate the repeater).


RECEIVER: 147.780 Mhz +-2 micro volts

sensitivity at duplexer terminal. +- 5 Khz audio

deviation. +- 2 Khz transmit frequency tolerance.


TRANSMITTER: 147.180 Mhz +- 2 ppm Output 15 watts to the antenna (after duplexer) +- 5 Khz

peak audio deviation. Transmitter does not encode CTCSS tones.


ANTENNA: Omni directional 5+ dbd gain. ERP about 45 watts. Antenna base is 40 ft. above ground. It is a commercial antenna (Celwave PD 220) that consists of eight collinear dipoles mounted in a 20 ft. long fiberglass tube.


FEED CABLE: 75 ft. 1/2" copper hard-line.


POWER: Radio operates from a nominal 12 volt (13.6) battery, 250 amp hours maintained by a 25 amp regulated charger. This battery is shared with the 441.175 repeater. Receive current drain 340 ma Transmit current drain 4.5 amps.


IDENTIFICATION: Repeater signs W6WGZ/R every eight minutes and two minutes after the last transmission of a QSO. It waits until the end of a transmission before identifying unless the transmission lasts longer than two minutes. If the repeater is in TONE MODE a short tone 

burst follows call identification.


TIME OUT: The timer allows five minutes continuous transmission without a break. It then turns the transmitter off without warning. Reset (no received signal) must be at least two seconds.


ALARMS: There are four station alarms. Each is a loud tone followed by a group of five shorter tones followed by a group of two tones, then a group of one, two, three or four tones. This whole sequence is repeated several times.


Third group


One tone: A.C. power fail (operating on



Two tones: Vault temperature out of limit,

below 35 degrees or above 95 degrees



Three tones: Battery under voltage, 11.4



Four tones: Vault door open. There is no

external defeat on the door alarm.


The MCARC is a member of the Northern Amateur Relay Council of California and the  repeater frequencies have been coordinated and sanctioned by that council.




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Copyright 2019 Madera County Amateur Radio Club
Last modified: February 15, 2019