Wednesday, March 31, 2010

Shorten 20m band rotary dipole.

This is my second Trapped antenna,
total length : 5 meter ,
Matching : Hairpin match.
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Tested with my analyzer to get excellent resonant and SWR.

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Total weight of this antenna is 1.3 Kg
Idea for potable use.
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The longest tube is not more than 40 inch.
more easy to carry or keep in boot .
Size is really matter when setup a potable station.

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Using hose clip for easy setup and tune .

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I will try to make it as a 2 element yagi ,
Cause I really need it for when I have event.
Stay tune ...

Tuesday, March 30, 2010

Event at UTM Pesta Konvo (ARC-UTM)

On this event, I bring my own rig FT897D with tuner
and Kenwood TS50 with auto tuner.
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Ody bring his Proud Helix antenna
40m ,20m and 10m band.
He make a 40m net check in his WAJA
Just click HERE for more info.

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Antenna setup :
G5RV Jr.
Homebrew Fishing Rod vertical antenna for 40m 30m 20m 17m 15m 10m
Homebrew 3 element 10m Yagi
Homebrew 40m Trap Dipole
Homebrew 4 element Dual band 10m 20m Yagi.
Homebrew 5+8 element Dual band V/U Yagi.
Homebrew 6m Moxon antenna.
As you can see in this photo.
How I set all these antenna UP !! Hi Hi..

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In this pic , you can see a tripod with a
8m high fishing rod antenna.
it cover from 40m to 10m band without tuner.
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Thanks and 73 to all the UTM-ARC members !!
Hope to see you again..

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40m Trap Dipole antenna.

This is my first time making trapped dipole ,
Success after few time of trimming !! hi hi...
center freq 7.070 Mhz
VSWR : 1 : 1.2
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Total weight is 3.2 Kg
It heavy , because of the center part
using 2.5mm thick stainless steel plate.
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Total length of this antenna was -+9 meter.
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Trap part using UPVC and PVC pipe,
with stainless steel screw
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Thursday, March 11, 2010

My new antenna for 10meter band (4 element cubical quad)

This is my new antenna for 10meter band,
Boom length : 3.8 meter
forward gain : 12.5 dB
front/back ratio : >25 dB
VSWR 1.3:1 @ 28.500 Mhz
VSWR 1:1 @ 28.700 Mhz
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It is a bit heavy cause by the material I use : Bamboo stick
Hi Hi...
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Temporally use Diamond BU-50 Balun.
will use home brew balun later..
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QSL Card

QSL CARD From China.
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10meter band Helix mobile antenna (New Design)

This is my proto type 10meter band Helix Ant.
It used the theory of Dipole antenna.
Tested on RX site , Excellent RX !!
TX can be tuned with my FC-30 auto tuner.
Not exactly tuned for the band right now,
and I'll tune it with my analyzer later.
Stay tune......
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The length of this Helix are same as the original 20m Helix.
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The 1st one was the Original 10m ,
2nd one was my NEW Design..hihi..
3rd one was 20m band.
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Saturday, March 06, 2010

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This antenna has only one feeding,
and the design is from G0KSC.
Boom length : 5 meter
4 element on 10 m band
5 element on 6 m band.
I try to make it as light as possible !!
total weight is less than 10 Kg
right now this antenna is waiting for test
please wait for the result...