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Sunnyvale, CA | The coax cable between the EZ-Guide Plus and its antenna is Coleman RG-58-C/U. It is 50 ohm impedance, with 95% tinned copper braid shield. The center conductor is stranded. The ends are right angle TNC connectors manufactured by Radiall. There are some cheap coax cables available with 50 ohm impedance cables and they may have 60% shield coverage and a solid center conductor. (they save money by putting less copper braid in the shield.) These lower braid percentage cables might work, however if there is too much leakage of the amplified signal from the lower percent coverage shielded braid and the amplified signal feeds back into the antenna, you will have an oscillation (similar to audio feedback squeal when an open mike is too close to a loudspeaker in an auditorium). If this happens the GPS receiver will not track any SVs, although usually no permanent damage will occur. The stranded center conductor on the factory supplied cable is more resistant to bending fatigue failure than a solid center conductor.
I have seen some (really cheap!) TNC connectors made with center pins that will damage the connector on the antenna and lightbar. In these connectors the center pin was conical shaped and the largest diameter was larger than the receptacle contact. the conical center pin contacts are very unreliable. The proper center pin shape in the TNC connector is cylindrical with a slight rounding at the tip. | |
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EZ steer reciever cable
