KC5GNG's Ham Radio Page

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The 146.66- repeater is a GE Mastr II mobile radio modified for repeater operations. These modifications can be found many places on the Internet. In the current configuration of the repeater we are running approximately 70watts out of the transmitter. The radio can run up to 150 watts. The receiver is running approximately a 0.1 microvolt sensitivity. This repeater has general coverage of about 45 to 50 miles with a mobile rig and about 7 to 10 with a handheld. This repeater is an open repeater with no PL at this time, there maybe one added for the purpose of eliminating some local intermod. The PL will have a bypass code using a DTMF code so that all can use the repeater.

The 442.700+ repeater is co-located with the 146.66 and is also a GE Mastr II radio, however it is a true repeater style GE Mastr II. This repeater is running approximately 60 watts out of the transmitter and the receiver also has about a 0.1 microvolt sensitivity. The 442.700 repeater has about the same range as the 146.66 repeater.

The cavities used for the 146.66 repeater are Wacom cavities in the standard 4, Bandpass-Bandreject (BP-BR), configuration with 2 on the transmit side and 2 on the receive side. The cavities used on the 442.700 repeater are modified commercial cavities donated by Alcatel.

These repeaters are controlled with a RLC-3 controller from Link Communications. This controller is configured with the autopatch, DVR, and analog I/O cards for options. With this setup we have the capabilities of autopatches from both repeaters and linking capabilities. The I/O card is going to be used to notify club members over the air of people at the repeater site, possible high temperature problems in the cabinet, and will soon be monitoring the UPS system we will be putting on the repeater.

The type of antennas used for both repeaters are commercial DB Products antennas. These antennas were modified to the ham frequencies by replacing the phasing harnesses. These antennas are phased folded dipoles that are semi-directional based on the mounting position of the folded dipoles on the mast. In the current configuration of both our antennas we are omni-directional.

	146.66 Repeater Specs.	442.70 Repeater Specs.
Radio	GE Mastr II mobile	GE Mastr II Repeater
Output Power	70Watts (at Transmitter)	60Watts (at Transmitter)
Cavities	Wacoms	Modified commercial
Antenna	DB224 (Decibel Products)	DB410 (Decibel Products)
Coax	RG214	RG214
Height	Approximately 100ft above the ground	Approximately 80ft above the ground
Location	Baylor Hospital in Garland	Baylor Hospital in Garland
Controller	RLC-3 (port-1)	RLC-3 (port-2)
Power Supply	GE Repeater Power Supply	GE Repeater Power Supply
SWR	1.4 to 1	1.5 to 1

For more information contact Mark (KC5GNG) Communications Officer GARC 1999-2000 at [email protected].