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29fb002 Profile
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Registered: 09-2009
Posts: 36
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posticon Simple 11m band homebrew from scrap antennas


Hi all, I just wanted to share this antenna with you all,
Im not going to make any claims of the best preformance in the world ... But this antenna is cheap and whats better it works.
All I did was get a broken Antron 99 and solder a long length of antenna wire to it. then got the antenna anyaliser out and started trimming back.
I have rx +40 db reports from The EU and outside. worked USA,brazil,Haiti and LEBANON, with this very simple antenna. Basically its almost a full wave antenna ...

As I said Im not making any great claims with this antenna but it is resonant at 27555 and seems to hold a good swr from 27340 through to 27750 ( all under 1.5)
and above all else it only cost me 75 cent to make as the componants came from other broken antennas( or as the xyl says scrap )
And YES I did use it vertical, horizontal and also at 45 degrese in N/S direction.
Best results I got were in the sloper position with the insulator raises to about 12 m above the ground. The antenna was fed with wesflex 103 coax in all tests..
The only problem that I had was static in the v or sloper positions.
In H position the static was only bearly there. (The cause of the static... a ruddy old TV set)
Im sure that there will be some remarks about this antenna but I dont mind lol. IM not a Ham but I still enjoy ,like so many others , to experiment and enjoy the hobby.
I just thought I`d share this little antenna with you all. BTW when erected this antenna is also very low profile , which might be of use to those with small gardens or confined spaces.
Try it if you like and have some fun while doing this.
It takes about 20 min to make this antenna and I use it mainly for portable use( quick deploy , 5 min and its all systems go)
73`s

For some reason the Images wont load ,but can be seen on [sign in to see URL] and check out Photo Gallery

Last edited by 29fb002, 20/Jul/2010, 8:39 pm


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Yaesu Ft 1000Mp MkvV (200 w) ,Moonraker 4,Create RC5, MFJ949E ,W2IHY 8band and eqplus , t-bone studio mic.
WKS 100 for AM day

Yaesu Ft857D - KL 400- K40 or dipole (mobile)
20/Jul/2010, 8:35 pm Link to this post Send Email to 29fb002   Send PM to 29fb002 Blog
 
topbuzzuk Profile
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Big Cheese
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Registered: 11-2007
Location: Wiltshire, UK
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Re: Simple 11m band homebrew from scrap antennas


lokks a very simple design, intresting how things work be nice to put the details into some antenna software to get an idea of the radiation pattern

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22/Jul/2010, 10:35 pm Link to this post Send Email to topbuzzuk   Send PM to topbuzzuk Yahoo
 
29fb002 Profile
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Registered: 09-2009
Posts: 36
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posticon Re: Simple 11m band homebrew from scrap antennas


Thanks topbuzzuk .
It is just so simple to make this antenna.
I don't have any antenna software to try but if anyone tries the same design I would be interested to find out also.
I am presuming that this antenna has a similar pattern as an antron 99 but with some slight changes. Just thought it might be of interest to some in confined areas or areas with non antenna friendly neighbourhoods .



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Yaesu Ft 1000Mp MkvV (200 w) ,Moonraker 4,Create RC5, MFJ949E ,W2IHY 8band and eqplus , t-bone studio mic.
WKS 100 for AM day

Yaesu Ft857D - KL 400- K40 or dipole (mobile)
23/Jul/2010, 4:23 pm Link to this post Send Email to 29fb002   Send PM to 29fb002 Blog
 
MEGLOTRON Profile
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Registered: 06-2011
Posts: 7
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Re: Simple 11m band homebrew from scrap antennas


-The static decline in horizontal is due to most static being vertically polarized.

Have you tried a center-fed dipole, about 8' 6" of wire (trim down from 9') on each side of split coax should give you a little better performance because you're using a somewhat lossy and unnecessary a99 matching network unless you NEED to end-feed it.

 Pulling back the center of the horizontal dipole to form a 120° V with the smaller aperture in the direction of use can help flatten out the SWR on the correct length center-fed 1/2 wave dipole while keeping the reactance near zero.

But the first, most important spec is the fun factor and you seem to have found plenty of resonance there. Thumbs up!
25/Jun/2011, 2:05 pm Link to this post Send PM to MEGLOTRON Blog
 


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