Skypper element spacing / beam element spacing?

[ghutch]

Rather than just let the fishing poles dictate my spacing (building a skypper) I want to use spacing that gives the best gain. .
Does anyone have models or experience with these spacing s for max gain and frt. to back?? I have used 12 foot Fiberglas pole so boom length is up to about 20 feet, taking into account the loss in distance of the bending of the poles
With poles I have in place my spacing can be from 100 inches to 120 inches from the reflector to the driven element as well as the reflector. These measurements are from the apex or farthest point from the driven element.
< I > the reflector as you know is bent towards the driven dipole in the center....I have about 20 inches of adjustment on this space? Both the reflector and director will need to have the same spacing to keep all elements on the same plane. if i use the same spacing on both the reflector and director wont this equal spacing have a negative effect on performance?
Yagi spacing on 3 elements is not as wide? Not even close. Any thoughts? Or models.

 

[Henry HPSD]

I believe a similair question was asked before...?

http://www.worldwidedx.com/amateur-radio-antennas/150294-building-skypper-need-info-spacing-etc.html

The skypper antenna (g4zu) isnt as well known in the US as it is here in Europa.
It is with good reason one of the most popular, portable antenna there are several "manufacturers" and it is easy to construct.

If i may ask ? what is the issue you are experiencing ?
as i "interpertate" the answer provided wasnt covering it..

Kind regards,

Henry

 

[ghutch]

Henry....my design has spacing as follows. The antenna is square to arrive at the distances you suggest the antenna will need to be two triangles in shape or form.....I allowed the fishing poles all bend or flex the same amount? This has caused the problem with the distances
My distance/ measurements are

Driven element to reflector closest point 1.70 mtrs
Driven element to reflector farthest point 2.91 meters
Driven element to director closest point 1.20 meters
Driven element to director farthest point 2.91 meters

These distances have kept 3elements on the same plane....I may need to attached the driven element differently and this will allow the spacing to change closer to the ones you recommended. The first test seems to have directivity and some rejection also. I have picture but don't know how to post them here...to
large?
My question was after looking at yagi spacing this antenna has much wider spacing on the farthest points.

 

[barefootindian]

SKYPPER ELEMENT SPACING

Hi if it's any good to you why not try the good folks @ All about antennas and they may have the measurements to help you get the best signals to and from your Skypper Antenna. Hope this helps.

 

[ghutch]

Got It working!!
Henry thanks for your information....my second post was due to my not being able to get the right element spacing! I had to start over and cut two of the Fiberglas poles a bit. I was wanting to leave them all the same size, I was having trouble getting the spacing on both reflector and the director! After starting over I cut two of the poles to get the maximum distances you recommended....this made getting the minimum distances easy. I was able to get exact minimums and maximums

Checked it out today with very few stations on the air here in s Texas, the best test was a 5/5-6 San Francisco station, when the beam reflector to him it almost completely stops his signal! The rejection is looking great. Front gain brought a 5/2 signal up to 5/5.....both were with the antenna at 12 feet with my auto underneath ....I expect once it is at 20 feet next to the saltwater it will be better. All and all after my first failure to understand the geometry I think it could be built easy in a few hours. Weighs about 5-6 lbs could be turned with any small rotor.
Swr is flat at 555 .....very happy with the results....Henry might get a chance to work you this weekend 73. Thank all for the help!

 

[ghutch]

First day to really test it out......works well. The rejection is great front end is wide! The wide frt end is a good thing as you hear off the sides almost as well as he front. this is a good dx antenna. But just being able to anttenuate some of he qrm is wonderful. This is an easy project and setup at the beach took 10 minutes. I used 3 stakes and rope guys the wind was rippin here today. Thanks for all the ideas and help. 73