Technical Information for the D-STAR Repeater

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The repeater is uses a DB Products DB-420 vertically polarized omni directional antenna. The antenna is fed with 150 feet of 7/8 heliax and provides 9DBd gain. The antenna is mounted at the top of the tower which is 850 feet above sea level, or about 150 above ground level.


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, on the receive side of the duplexer.


The repeater uses an ARR P432VDG pre-amplifier repackaged in a Hammond die-cast box.


The repeater uses a 100w TE Systems UHF amplifier.