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23 CM Beacon

This is a 30-watt "sea level" beacon intended for the coastal path between Northern and Southern California. It is located in CM97am, aimed at 140 true. The tower is a small 48ft job located at a relative's home 2 miles across town from me.

This should cover 125-155 true at the 3db beam width of the array, which consists of four 4-foot Yagis stacked vertically, and horizontally polarized. Total ERP is 3kw. Please forward any signal reports to the email address listed in the navigation bar.

Note: as of August 2010, the beacon has been dismantled for upgrades; restart is planned for mid-2011.

The antenna pattern (measured on an antenna range) and construction details for the electronics follow below.


Frequency 1296.340 MHz

Note: To correct for long-term drift, the last alignment was performed on 1/8/2008, and the frequency set to 1296.340 MHz. Measurement accuracy is +- 100 Hz.

Power Level 30 watts
Antenna gain / Feedline 21.9 dbi fed with 90 feet of Andrew LDF5 (7/8)
Antenna direction 140 true
Current location CM97am
Message content (repeats) a 5 second carrier, then "de W6PQL/b CM97am"

click any thumbnail below for a larger picture