TO CHANGE THE SIZE OF THE WINDOW :
HOLD DOWN KEY : Ctrl & ROLL THE MOUSE WHEEL
​
TO RETURN TO THIS HOME PAGE = CLICK LEFT FACING ARROW AT TOP LEFT HAND CORNER
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
TO CHANGE THE SIZE OF THE WINDOW :
HOLD DOWN KEY Ctrl & ROLL THE MOUSE WHEEL
# UNLESS OTHERWISE STATED ALL 3 SCREWED ONTO RADIO
( BOTH COILS & ANTENNA FEEDLINE )
# RED = ATU HELD IN UNTIL FLASHING
YEASU FT991A HF/50 CONNECTION
NOTE: CPO = CENTRE PIN ONLY of coax
MODE FREQ. TX PWR SWR SWR ATU NOTES
# CW 14.000 5 3 OFF
100 3.1 “
“ 14.070 5 3 “
100 3.1 “
- - - - - - - - - - - - - - - - - - -
MODE FREQ. TX PWR SWR SWR ATU NOTES
# USB 14.112 5 3 OFF
100 3.1 “
“ 14.120 5 3 “
100 3.1 “
“ 14.124 5 3 “
100 3.1 “
“ 14.340 5 NIL OFF
100 NIL “
TO RETURN TO THE " HOME PAGE " CLICK ON THE LEFT ARROW AT THE TOP LEFT HAND CORNER OF THIS WINDOW
VK2IAUALLCOAXMULTIBANDANTENNA (BMCA refer log book 1-9-18 )
/ mm ( SHOWBOAT )
YEASU FT991A HF/50 CONNECTION
MODE FREQ. TX PWR SWR SWR ATU NOTES
# CW 18.068 5 2 2 OFF 18.068 to 18.105 CW ONLY
100 2 2 CW ONLY
​
“ 18.105 5 2.6 NIL “
100 2.8 1.1 “
- - - - - - - - - - - - - - - - - - -
MODE FREQ. TX PWR SWR SWR ATU NOTES
18.116 to 18.166 USB ONLY
# USB 18.116 5 3 1.1 OFF
100 3.1 1.1 “
“ 18.166 5 2.2 NIL “
100 2.5 NIL “
VK2IAUALLCOAXMULTIBANDANTENNA (BMCA refer log book 1-9-18 )
YEASU FT991A HF/50 CONNECTION
​
MODE FREQ. TX PWR SWR SWR ATU NOTES
21.000 to 21.065 CW ONLY
# CW 21.000 5 3.1 OFF
100 3.1 “
​
“ 21.010 5 3.1 “
100 3.1 “
“ 21.020 5 3.1 “
100 3.1 “
“ 21.040 5 3.1 “
100 3.1 “
​
“ 21.065 5 3.1 “
100 3.1 “
​
- - - - - - - - - - - - - - - - - - - - - - -
​
21.156 to 21.186 USB ONLY
MODE FREQ. TX PWR SWR SWR ATU NOTES
# USB 21.156 5 NIL OFF
100 NIL “
​
USB 21.186 5 2.1 “
100 3.2 “
VK2IAUALLCOAXMULTIBANDANTENNA (BMCA refer log book 1-9-18 )
/ mm ( SHOWBOAT )
MODE FREQ. TX PWR SWR SWR ATU NOTES
24.896 to 24.916 CW ONLY
# CW 24.890 5 1.125 OFF
100 1.135 “
“ 24.916 5 1.125 “
100 1.5 “
​
“ 24.975 5 1.125 “
100 1.125 “
​
“ 24.990 5 1.125 “
100 1.125 “
​
- - - - - - - - - - - - - - - - - - - - -
​
24.936 to 24.986 USB ONLY
MODE FREQ. TX PWR SWR SWR ATU NOTES
# USB 24.936 5 1.125 OFF
100 1.135 “
​
“ 24.950 5 1.125 “
100 1.5 “
​
“ 24.960 5 1.125 “
100 1.5 “
​
“ 24.975 5 1.125 “
100 1.125 “
​
USB 24.986 5 1.5 “
100 1.15 “
VK2IAUALLCOAXMULTIBANDANTENNA (BMCA refer log book 1-9-18 )
/ mm ( SHOWBOAT )
MODE FREQ. TX PWR SWR SWR ATU NOTES
28.004 to 28.196 CW ONLY
# CW 28.000 5 NIL OFF
100 NIL “
“ 28.030 5 NIL “
100 NIL “
“ 28.070 5 NIL “
100 NIL “
“ 28.200 5 2.1 1.1 “
100 2.4 1.125 “
“ 28.885 5 1.15 “
100 1.5 “
CW 29.100 5 3 1.5 “
100 3.1 1.3 “
- - - - - - - - - - - - - - - - - -
28.300 to 29.100 CW or USB
FREQ. TX PWR SWR SWR ATU NOTES
28.300 5 OFF
100 “
​
“ 28.885 5 1.15 “
100 1.5 “
​
29.100 5 3 1.5 “
100 3.1 1.3 “