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Sigma4 Try the link below also. http://www.cbtricks.com/ant_manuals/avanti/av174/graphics/sigma4_av174_om.pdf

Hope this info may help with the discussion on the Vector. I should have taken the info from the Sigma4 file since it uses know dimensions but I used the 26.6' Vector. The 1st pic is with currents on. The 2nd is current and phase. Also attached is the output file showing more info. Post...

RE: Vector Decided to go ahead and convert the Sigma4 file into the Vector from the info sheet Marconi posted earlier. The Vector is shorter so the top tube will now be .625" on the Vector. .625" @ 28.7" .750" @ 40" .875" @ 40" 1.0" @40" 1.125"@40" 1.250"@40" 1.375"@50" 1.5" @55"...

Hello Shockwave. Thanks for the info on the 7/8" spacing on the radials at the base bracket. I still have to taper the radial elements and read up on the tube correction factor when simulating a bracket. ( Short wires at the base like in Henrys EZNEC file. W6QHS/W6NL or W2PV info. I'm only...

Henry I will email you from another computer. Should be ok this time.

I have been running the Sigma model through eznec and Antenna Model. Both look very close in results. Here are some of the elevation plots at different wavelengths in height: 1/2, 3/4, 1, and 1.5wave up. The swr plot is from Antenna Model. Its with a conjugate match to show the bandwidth.

RE: Sigma4 and Vector Thought I would start at the begining with the AV174 Sigma4 pdf posted earlier in the thread to create an eznec file. From the file I have the following information. Vert info: .500" @ 45" .625" @ 38" .750" @ 30" .875" @ 30" 1.00" @ 38" 1.125" @38" 1.250"...

Check the wire diameter for wires 2 and 9 on the wire sheet Bob posted. Very interesting info from the group. Lets get the exact tube diameter,taper and lengths to update the nec file then adjust segmentation. Pulling up a chair.

K1TTT Technical Reference Dow Corning info

RE: Beam headings John there are many websites and programs for beam headings. Do a google for the Ham Radio ADF program for starters. If you know the ham radio country prefix list you are good to go. Check out the AC6V website and the North Jersey DX Association website for listings also.

Hello to the group. After going over this design with Shoemaker we decided to homebrew an eznec file and take a look. I believe someone made a mistake when the instruction manual was drawn up for this beam. My nec file has the elements at a different degree angle than the previous posted nec...

Some more info. K1TTT Technical Reference

Hello Master Chief. Nice work on helping the group design antennas that will open and close the band. Doing the same here in South Jersey with the local guys. Showing them all the old info from W2PV,K8CC,K6MYC etc. A few of N6BV'S 5 el beams went up this summer. Was a big Joegunn crowd...

Some owa yagi links The Optimized Wideband Array Yagi 6 Element 10m OWA YO file Guys pick up a copy of the ARRL Antenna Book with software. Included in the software are pgms from Dean N6BV. You can use the Yagi for Windows program (YW) and the Scale program to do anything you will ever...