HIGH PERFORMANCE 

HF RECEIVING SYSTEMS & COMPONENTS

Why Hi-Z ?

Setting the new standards. SNIF (signal to noise improvement factor) came from the Syracuse University Research Corporation. As quoted from the 1 June 1967 Interim report, " The improvement factor (SNIF) is shown to depend on the geometry of the array, on the phasing network and on the ratio of atmospheric noise power to internal system noise power." Hi-Z believes this to be a more understandable method of evaluating total receiving system performance. SNIF is easier to understand as a means of comparison.

Hi-Z Antennas vs. the Competition

Hi-Z Antennas™ Bio:

·         Best designs in SUPER DIRECTIVE phased receiving arrays.

·        Best 3, 4 and 8 element RX systems

·         No compromises

·         State of the art designs

·         Competent, honest, ethical and respectful company ethos

 Hi-Z Antennas vs. the Competition

Models

Competition

 

RDF

Directions

Bands

Upgradeable

Issues

Foot Print

Hi-Z 2 (2-4)

None

~9

2 or 4

Tba

2 or 4 directions

 

40 -50 feet

Hi-Z 3

None

9.2

6

160, 80, 40

 

 

40 - 50 feet

Hi-Z 4

Competition 5+ yrs old, WYSIWYG

>=12.2

4 upgradeable to 8 (4-8PRO UP)

160, 80, 40

PRO to 8 directions. YES

Competition=Array Safety Distance TX RF level issues

80 ft sq

Competition=???

Hi-Z 4-8PRO

None

>=12.2

8 directions

160, 80, 40

YES

 

113 foot dia.

Hi-Z 8

Competition  5+ yrs old, - WYSIWYG

>=13.5

8 directions

160 or 80

YES

Competition =Array Safety Distance TX RF level issues

Hi-Z 200 ft dia.

Competition= 350 ft dia.

 Hi-Z vs. Competition Issues

·         Competition states - Receive Eight Circle Array package for Close Spacing to Transmit Antenna – power and spacing issues

·         Competition states - Operates from 100 kHz to 30 MHz  HOW???  What is the performance??

·         Hi-Z proudly posts performance validation plots; Competition does not
Competition states - Excellent directivity for better signal-to noise ratio - based on what and over what frequency range???

·         We use robust vertical elements vs. their CB whips

·         Competition Vertical amps are easily overloaded; Hi-Z Amps are Robust and Immune to RF dense environments

 

Hi-Z Antennas vs. Beverages

 Beverages - Base line Single direction Beverage, Dual Direction Beverage

 

Models

Beverage, comparable length, see foot notes

 

RDF  Hi-Z

Directions

Bands Hi-Z

# of Beverages to = Hi-Z Directions

Issues  / Comments

Foot Print – Hi-Z

Hi-Z 2 (2-4)

540-880 ft Long

~9

2 or 4

Tba

1 or 2 dual

Beverages require a lot of acreage

40 -50 feet

Hi-Z 3

880 ft Long

9.2

6

160, 80, 40

3 dual

 

40 - 50 feet

Hi-Z 4

880 ft Long

>=12.2

4 upgradeable to 8 (4-8PRO UP)

160, 80, 40

2 dual

 

80 ft sq

 

Hi-Z 4-8PRO

540-880 ft Long

>=12.2

8 directions

160, 80, 40

4 dual

 

113 foot dia.

Hi-Z 8

880- 1100ft Long +

>=13.5

8 directions

160 or 80

4 dual

 

Hi-Z 200 ft dia.

 

 Beverage Issues:

·         Maintenance – medium to high

·         Lots of land - acres

·         Less S/N Performance

·         Less directive

·         Poor low angle response

·         Performance effected by ground environment

 Hi-Z Benefits:

·         Hi-Z compares to 1100 ft phased beverages

·         Significantly less land required

·         Less cabling required (one coax feed, one control cable)

·         Hi-Z 8 is a SUPER Directive array

·         Better suited in tropical or high noise environments  due to pattern response

·         Not effected by poor ground

·         No radials