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440 Repeater

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Madera County Amateur Radio Club

440 Repeater Technical Information

CALL: W6WGZ/(A,B,C,D Depending on operating mode)


LOCATION: Deadwood peak. Two miles west of Oakhurst and northwest of highway 41.


ELEVATION: 4540 ft.


REPEATER MODES: Repeater I.D. W6WGZ/R will add A,B,C,or D depending on operating mode.


A. Two meter and 440 repeater interconnected,

    that is, input into either receiver will output

    on both transmitters.

B. Each repeater operates independently of each

    other as if they were entirely separate.

C. Reserved.

D. Reserved.

RECEIVER: 446.175 + 146.2 PL at all times. 0.1 micro volt sensitivity at duplexer terminal. +- 5 Khz audio deviation. 

+- 1 Khz carrier tolerance.


TRANSMITTER: 441.175 Khz +- 1ppm. Transmitter encodes PL if receiver input is on 441.175 , it does not encode PL if input is on 2 meters (A mode) Output 15 watts to the antenna (after duplexer) +- 5 Khz audio deviation. PL encode 300 Hz deviation.


ANTENNA: Omni directional but side mounted on a metal tower (south side) causing a pattern dimple toward north. 6dbd gain. ERP about 55 watts. Antenna base is 30 ft. above ground. It is a commercial antenna consisting of eight collinear dipoles in a 10 ft. fiberglass tube.


FEED CABLE: 60 ft. 1/2" copper hard-line


POWER: Radio operates from a nominal 12 volt (13.6 v operating) battery of 250 amp hours maintained by a 25 amp regulated charger. This battery is shared with the two meter repeater. Receive current drain 110 ma. Transmit drain 5.0 amps.


IDENTIFICATION: Repeater identifies W6WGZ/R (x) every 

eight minutes during a conversation. It waits until the end of 

a transmission to identify.

(x) is the operating mode as above.


TIME OUT: The timer allows five minutes without a break. It then turns the transmitter off without warning.


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.


This repeater, coupled with the 147.180 repeater, is owned and operated by the Madera County Amateur Radio Club. 



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