Hi-Z Antennas Hi-Z 8A-80 Handmatig - Pagina 5

Blader online of download pdf Handmatig voor {categorie_naam} Hi-Z Antennas Hi-Z 8A-80. Hi-Z Antennas Hi-Z 8A-80 14 pagina's. 160/80 meters 200/100 foot diameter circle, a models have the pre-amp external level1 plus amps, level2 with plus6 amps

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least 1 to 2 feet of soil. For areas of really bad and dry soil it is recommended to use two or even 3 short

ground rods. Two feet length is fine. Pre-made Elements are available at

Over rocky, low conductivity areas it is unclear how well the system will work due to some phase and

amplitude shifts in received signal. In the worst of cases it may be necessary to install 6 or so short radials

of 6 foot in length. Identical radial layout has been measured to be a necessity with these arrays! There are

real and measurable inaccuracies when using radials below these Hi-Z elements. The best

recommendation when radials are needed would be stringent accuracy in layout of 6 to 8 each 6-foot long

radials below each element. Wire as small as 18 Ga. Would be fine. Do not use radials unless absolutely

necessary.

Connecting Cables

The antennas are arranged in a circle configuration with a diameter of 200 feet (160 meters) and 100 feet

(80 meters

To calculate the needed connecting cables required for sending the signals from each antenna to the center

controller one can use the following formula.

Formula: Circle RADIUS plus 4 feet extra cable giving 100 feet plus 4 feet or 104 feet for 160 meters or 54

feet for 80 meters.

The length of these cables is not critical except that they all be the same length and from the same spool of

cable. This ensures the phase delay for each cable will be equal and therefore not require any length

compensations. Actual length is unimportant due to the impedance matching used in the system.

The way to get identical cables it to utilize one 1000-foot spool of RG-6. Cut 8 each 102-foot lines from

the spool for 160 meters or 8 each at 52 feet long for 80 meters. Use quality RG-6 connectors.

The following plot shows the overlap between two selected directions in the Narrow 8 array on 160

meters.

Hi-Z Amp PLUS & Hi-Z Amp PLUS6

The Hi-Z Amp requires weatherproofing, see our website for suggestion to wx-proof these amps.

The PLUS6 amps do not require wx-proofing, BUT the RG6 connection must be correct so as not

to leak WATER INTO THE COAX CONNECTION AND ULTIMATELY MIGRATE THE WATER

INTO THE INSIDE OF THE ENCLOSURE. Connect 8-10 inch wires to the input terminals of either

amp. The Antenna terminal connects to the base of each vertical element and the GND connects

to the ground rod at the base of each vertical.

Hi-Z 8A Element Man. 3.0

http://www.hizantennas.com/hiz_verticals.htm