Hi-Z Antennas HIZ-PC-4A Manual - Página 3

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Control wires from the shack to the array need to be 4 wires customer supplied or 5 wires if optional 75

ohm preamp will be switched on and off (75 ohm preamp requires an added relay to work with the SS2 and

SS2-Plus shack switches). One each for Ground and +13.8 Supply that are heavy enough to carry 300

milliamps the full distance your array is from the supply. The other 2 direction control wires for the CTRL lines

carry less current at about 40 milliamp max. Typically 18 gauge direct bury sprinkler wire works well out to

several hundred feet. There are many varieties of wire suitable for this array. Users should think about their

array distance and voltage drop as a result of current flow to ensure voltage at the Phase Controller in the

field is 11 to 14 VDC for proper operation. It is possible to raise the voltage at the shack above 14 VDC as

long as the array only sees 11 to 14 VDC at this phase controller. These arrays are quite compatible with

wireless solutions including the Hi-Z Wireless system for eliminating multiple wires.

Choosing an Array Side Dimension and Delay Cable

Hi-Z formerly recommended 80 feet per side for the best 160-meter band

performance. Due to phase combiner and Hi-Z amp improvements we now

recommend using 60 feet per side where you get exactly the same RDF

performance as an 80-foot spacing. Going to 60 feet per side gets you great

patterns on 40 meters at little to none 160-meter performance loss. We offer the

80 feet per side information for users with previously installed arrays on an 80 feet

per side.

Making array choices for Dimension and Delay values can be considerably complicated.

For the person not wanting to make this decision we offer our "go to" all-purpose dimension

and delay values. Making changes later is can be accomplished using different phase delay

lengths or moving the elements. We offer 60 feet per side array dimension with a 60-degree

(long) and a 30-degree (short) cable at 1.84 MHz as a very good starting point. These result in

the following performance.