Signal Peak


From the city of Irvine at an altitude of about 1,100 ft above mean sea level, this site covers Southern Orange County and provides much needed fill in coverage to the eastern mountain canyons of the county and both north and south along the California coast. While this low level site has a paved road right up to the gate, being one (1) mile from the Pacific Ocean creates a large antenna maintenance problem. In a couple of years, the salt air literally corrodes away the phasing stubs on the link antennas.

The Remote was completely rebuilt in 1996. The original 5 foot cabinet contained a 440 Remote and one (1) link. The new 6 foot cabinet contains a 440 Remote and three (3) links. The only items from the original cabinet that were reused were the Motorola "MSY" receiver and power supply, the prototype Palomar Telecom Controller card cage and the Cactus Standard 28 volt 80 watt output power amplifier.

This is a picture of the site looking eastward. The white building in the foreground is the building the Remote is in and the large tower directly behind it is where the antennas are located. The Cactus 440 Stationmaster is the third antenna in from the left side on the top crossarm. The link antennas pointed towards Mount Laguna and Mount Otay are between the lower crossarm and the dish antenna on the right leg of the tower. The link antenna pointed towards the Switching Center is between the two (2) dishes on the left tower leg.

The old Signal Peak radio was built in a 5 foot Motorola Micor cabinet and consisted of the prototype Palomar Telecom Controller, a Motorola "MSY" Remote, with the transmitter driving a Cactus Standard 28 volt 80 watt output power amplifier. The link consisted of two Motorola Mitreks, one configured as a transmitter and one as a receiver.

The front of the old cabinet from top to bottom shows the Tx/Rx 440 duplexer, 440 transmitter TU-255 pass cavity, the heat sink for the 28 volt P.A., the Motorola MSY Remote, the prototype Palomar Telecom controller and the Motorola Mitrek link transmitter and receiver mounted on the rack panel.

 

 

The rear of the old cabinet from top to bottom shows the Tx/Rx 440 duplexer, the 28 volt P.A. and the Motorola MSY Remote.

The new Signal Peak radio was built in a 6 foot Motorola Upright cabinet and consisted of the prototype Palomar Telecom Controller, a Motorola "MSY" Remote, with the transmitter driving a Cactus Standard 28 volt 80 watt output power amplifier. The link radios consisted of three Motorola Mitreks as transmitters and two (2) GE MASTR Pro wideband receivers and one (1) GE MASTR II narrowband receiver. Because this cabinet contains so much hardware, there are three (3) different depth levels of mounting. The components were mounted on large panels so that by unscrewing one panel and moving it aside the hardware behind it could be worked on.

The front of the new cabinet from top to bottom shows the Tx/Rx 440 duplexer,440 and link transmitter pass cavities, transmitter circulators, the two (2) GE MASTR Pro wideband link receivers, the GE MASTR II narrowband link receiver, the prototype Palomar Telecom Controller card cage, the three (3) Motorola Mitrek link transmitters and the two (2) Astron Power Supplies, one 12 volt and one 28 volt.

 

 

 

The back of the new cabinet from top to bottom shows the back of the Tx/Rx 440 duplexer, the 28 volt Power Amplifier, (behind the Power Amplifier are the link duplexers) and the Motorola "MSY" Remote.

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Cactus Intertie, Inc


Revised: May 7, 2011 by WA6PYJ
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