Technical Information for the D-STAR Repeater

 
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  Antenna

The repeater is uses a DB Products DB-408 vertically polarized omni directional antenna. The antenna is fed with 250 feet of 7/8 heliax and provides 6dBd gain. The antenna is mounted on the east side of the tower about 200 feet above ground level.

 
Filters

For filtering, the repeater uses a TX-RX Systems 28-66-02B var-notch duplexer. There is also a TX/RX Systems 11-70-02 dual cavity band pass filter, and an 8 pole DCI bandpass filter.

 
Amplifier

The repeater uses an LDMOS pallet from an Axcera comercial broadcast TV amplifier repackaged in a TE Systems rackmount amplifier case. The pallet is capable of 300w output but the system is set to run at 100w.

 
Pictures