Madera County Amateur Radio Club Deadwood
2-Meter Reapeater Technical Information
CALL: W6WGZ/R (Madera club call)
Location: Deadwood Peak. Two miles east of Oakhurst, north of highway 41. 38 miles north of Fresno. Lat. 37 17 55 Long 119 41 04
ELEVATION: 4540 ft.
RECEIVER: 147.780 Mhz 0.2 microvolts sensitivity at duplexer terminal. +/- 5Khz 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 encode CTSS tone.
ANTENNA: Omnidirectional 5+ dbd gain. ERP about 45 watts. Antenna base is 30 ft above ground. It is a commercial antenna (Celwave PD 220) that consists of eight colinear dipoles mounted in a 20 ft. long fiberblass tube.
FEED CABLE: 75 ft. 1/2" copper hardline (Helax)
POWER: Radio operates from a nominal 12 volt (13.6) battery, 400 amp hours maintained by a 8 amp solar panel charger. Receive current drain is 340 ma, and transmit curent drain is 4.5 amps.
IDENTIFICATION: The 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.
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 long.
This repeater is a memeber of the Northern Amateur Relay Council of California and the frequencies have been coordinated and sanctioned by the council.
Repeater Presentation: Repeater presentation by Frank Ealand
The batteries
The 147.180 and the 441.175 transceivers, dubplexers, controllers & battery charger.
Old repeater vault and tower supporting antennas for both repeaters.