Antenna Size question

[AudioShockwav]

THE G4ZU....SPIDER BEAM......SKYPPER

Scroll down the list on the left hand side and click on SKYPPER and look at what it is.

almost equal to the performance of a 3 element yagi in a very compact package.

73
Jeff

 

[Henry HPSD]

That link seems to be wrong

This is the one you intended:

Skypper

The picture on the rigth side was from our base in Afghanistan, i used the antenna as 234SD0
About 1300 different stations in the limited time availible.

My Link in the post above also isnt working:
this is the one:
http://www.dx-antennas.com/Moxon.htm

That 3el G4ZU (as that was the inventor) antenna truly is a great performer.
But rather larger in comparisment to a moxon.
You can construct it yourself for about 30..40 euro's.
Im not sure if this is the updated page or not, i will have a look this week.
Otherwise i will upload the new version asap. (new measurents optimized).

Kind regards,

Henry HPSD
19SD348
All about antennas

 

[gamegetter]

this is a great link!

 

[Needle Bender]

slateblue couldnt you just make an 11 meter 1/2 wave square loop on its side so it's vertical and stub match it to 50 ohms? then you'd have a 4.5' tall dual directional vertical with something like 3db gain off the fed side. you could also use a tuner and parallel feeder line.

 

[AudioShockwav]

Thank you for the correct link, that is the antenna i was thinking of.

73
Jeff

 

[Needle Bender]

That link seems to be wrong

This is the one you intended:

Skypper

The picture on the rigth side was from our base in Afghanistan, i used the antenna as 234SD0
About 1300 different stations in the limited time availible.

My Link in the post above also isnt working:
this is the one:
moxon history

That 3el G4ZU (as that was the inventor) antenna truly is a great performer.
But rather larger in comparisment to a moxon.
You can construct it yourself for about 30..40 euro's.
Im not sure if this is the updated page or not, i will have a look this week.
Otherwise i will upload the new version asap. (new measurents optimized).

Kind regards,

Henry HPSD
19SD348
All about antennas

Henry is there a calculator for the element and boom spacing length if someone wanted to build one for another band?

 

[Henry HPSD]

There are online moxon calculators
There sadly are not online "G4ZU" calculators, at least non which im aware of.

However, its not too difficult to scale the model yourself.

30mhz= 10 meter
15mhz= 20 meter

So say the antenna is made for 30Mhz and you want to have it on 15 MHZ you just double all lengths/distances and DIAMETER!
If you need to have it on 150 Mhz = 2 meter you dived all dimensions with 5.
Simple as that. So if you know the resonant frequency..your set to go.

Hope that helped.

Kind regards,

Henry HPSD
ww.dx-antennas.com

 

[Needle Bender]

Do you have the boom or element length for the G4ZU 3 element for 10m?

 

[Henry HPSD]

here you go,
(see the attached word document)

Kind regards,

Henry 19sd348

 

[Needle Bender]

dank u