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HOLD DOWN KEY : Ctrl & ROLL THE MOUSE WHEEL
​
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INTRODUCTION TO THE vk2iau allcoax multiband antenna
The vk2iau coax multiband antenna is an RG58U coax cable multi strand core antenna configuration of 4 interchangeable
components , as follows:
A: antenna A = INVERTED V DPLE = 2.15m long EITHER SIDE OF THE INV V DPLE APEX . coax cable outer
braid radiating elements in parallel , plus feedline coax to radio
B: antenna B = SINGLE 2.15m long coax cable outer braid radiating elements in series,
plus feedline coax to radio
C: 3.5 metre long shorted coax , AS A COIL , counterwound on a small plastic cable drum and held in place by cable ties , the drum is then
covered in aluminium foil which is independantly earthed , all of this is then covered in a nylon stocking to protect the aluminium foil.
D: 4 metre long shorted coax , AS A COIL , as above
Note: ALL EXPOSED PARTS ARE COVERED IN ‘ ROOF & GUTTER SILICON “ , which , when cured is wrapped in electrical
tape note: impedance at the radio is achieved fully or in part by COMBINATIONS OF THE 4 interchangeable components
( as described above ) , to utilise inductance / capacitance to extend the the " frequency time " longer than the " frequency
physical length time of the radiating elements " thus preventing the signal from hitting a brick walland bouncing back as unwanted SWR .
NOTE 1: I have found the antenna system COMPACT and excellent for TX and RX from my 6m boat
NOTE 2: The coax cable is laid on the roof tiles of my house , very inconspicuos , almost " secret " . COULD BE USED DIGUISED
AS A WASHING LINE
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HOLD DOWN KEY Ctrl & ROLL THE MOUSE WHEEL
VK2IAUALLCOAXMULTIBANDANTENNA (BMCA refer log book 1-9-18 )
/ mm ( SHOWBOAT )
MODE FREQ. TX PWR SWR ATU NOTES
​
144.100 to 144.400 CW/VOICE NARROW BAND MODE ATU N/A
CW 144.100 5 1.1
50 2.1
​
144.250 5 NIL
50 2
144.400 5 NIL
50 1.7
- - - - - - - - - - - - - - - - - -
# USB 144.100 5 1.1
50 2.1
​
144.250 5 1.1
50 2
​
144.400 5 NIL
50 2
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VK2IAUALLCOAXMULTIBANDANTENNA (BMCA refer log book 1-9-18 )
/ mm ( SHOWBOAT )
MODE FREQ. TX PWR SWR SWR ATU NOTES
# ALL MODES ALL MODES
145.325 5 NIL ATU N/A
50 NIL 50w MAX.
145.350 5 NIL
50 1.12
145.375 5 NIL
50 1.1
VK2IAUALLCOAXMULTIBANDANTENNA (BMCA refer log book 1-9-18 )
/ mm ( SHOWBOAT )
MODE FREQ. TX PWR SWR ATU NOTES
# FM SIMPLEX ATU N/A VOICE ONLY
CW N/A
146.425 to 146.425 5 1.1
50 2 50w MAX.
​
146.500 5 1.1
50 2
- - - - - - - - - - - - - - - - - - -
# FM RPTRS GROUP "A " NEGATIVE OFFSET " "
146.625 to 147.000
146.625 5 NIL “
50 1.5 “
​
146.700 5 NIL “
50 1.6 "
# FM RPTRS GROUP " B " NEGATIVE OFFSET " "
147.025 to 147.375
147.050 5 NIL
50 1.6
147.375 5 NIL
50 1.6
NEGATIVE OFFSET
147.050 VK2RBM LAWSON
147.250 VK2RNS ASQUITH
147.300 VK2BGL ILLAWARRA
147.925 VK2RGN GOULBOURN
VK2IAUALLCOAXMULTIBANDANTENNA (BMCA refer log book 1-9-18 )
/ mm ( SHOWBOAT )
​
MODE FREQ. TX PWR SWR ATU NOTES
ATU N/A
CW or VOICE NARROW BAND MODE
# 432.100 5 1.7
50 1.8
​
“ 432.200 5 1.8
50 2
​
“ 432.300 5 1.8
50 2