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how about making a sigma 4 style antenna ???

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Old 05-15-2010, 03:17 PM
BOOTY MONSTER
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Default how about making a sigma 4 style antenna ???


hey jay , theres some pretty smart antenna cookies that think the sigma 4 antenna is the best omni ever made for the cb band . the originals are hard to find and the sirio wannabes arnt made very sturdly or for harsh weather . i was wondering if youve considered the possiblity of making a 3/4 or 7/8 WL version using the quality of materials your antennas are famous for ?

any chance of that happening ??


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Old 05-20-2010, 06:27 AM
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Hello Booty Monster:

Sure if thats what the buying public wants.

I have published internal reinforcement diagrams on how to make the Sigma 4 stronger.
The foreign models used very poor materials. Needing internal reinforcement.

Is there really a 7/8 wavelength Sigma 4 out there. Would like to see the assembly instructions. I get approx 31.5 feet for a 7/8 wavelength antenna.......

The Sigma 4 upgrade antenna would be around $400.oo plus shipping. And a few pounds heavier. Testing may even show us a way to improve the design.

Jay in the Mojave

Home of the Interceptor 10* Antenna )))))))))) The waves of the further......



Quote:
Originally Posted by BOOTY MONSTER View Post
hey jay , theres some pretty smart antenna cookies that think the sigma 4 antenna is the best omni ever made for the cb band . the originals are hard to find and the sirio wannabes arnt made very sturdly or for harsh weather . i was wondering if youve considered the possiblity of making a 3/4 or 7/8 WL version using the quality of materials your antennas are famous for ?

any chance of that happening ??

  #3  
Old 05-29-2010, 06:41 PM
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Quote:
Originally Posted by Jay in the Mojave View Post
Hello Booty Monster:

Sure if thats what the buying public wants.

I have published internal reinforcement diagrams on how to make the Sigma 4 stronger.
The foreign models used very poor materials. Needing internal reinforcement.

Is there really a 7/8 wavelength Sigma 4 out there. Would like to see the assembly instructions. I get approx 31.5 feet for a 7/8 wavelength antenna.......

The Sigma 4 upgrade antenna would be around $400.oo plus shipping. And a few pounds heavier. Testing may even show us a way to improve the design.

Jay in the Mojave

Home of the Interceptor 10* Antenna )))))))))) The waves of the further......

Bob85 has been telling people for years how to make a Sigma/Vector perform,now Shockwave is doing the same.Everything you need to know about tuning them for maximum performance is posted on this forum.Bob helped me set mine up and i think ill just leave my beam down.
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Old 05-30-2010, 08:08 AM
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Quote:
Originally Posted by Jay in the Mojave View Post
Hello Booty Monster:

Sure if thats what the buying public wants.

I have published internal reinforcement diagrams on how to make the Sigma 4 stronger.
The foreign models used very poor materials. Needing internal reinforcement.

Is there really a 7/8 wavelength Sigma 4 out there. Would like to see the assembly instructions. I get approx 31.5 feet for a 7/8 wavelength antenna.......

The Sigma 4 upgrade antenna would be around $400.oo plus shipping. And a few pounds heavier. Testing may even show us a way to improve the design.

Jay in the Mojave

Home of the Interceptor 10* Antenna )))))))))) The waves of the further......

YOU GOT MAIL!

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Old 05-30-2010, 10:24 AM
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  #6  
Old 05-30-2010, 10:48 AM
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31 ft version http://www.cbtricks.com/ant_manuals/cte/sigma4_copy.pdf
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Old 05-31-2010, 11:10 AM
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Installed my LW-150 this AM and at initial tuning of factory settings the bandwidth is 1.5:1 at one end from 26.665 and goes flat at mid band of the cb freq. and 1.5:1 at 27.935 so I'm pleased with a 2 meg bandwidth.

I suppose I could narrow that a touch with some fine tuning.

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Old 05-31-2010, 11:37 AM
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thats good for a first attempt at tuning a vector,
in my experience best signal performance and widest bandwidth seem to go hand in hand,
try to do some comparisons against the wolf.64, if you decide to tune it do it on rx with a distant stable signal, tune for max signal while watching bandwidth, try shockwaves fast track tuning method, my way is long and complicated but i wager we both get in the same ballpark when we are done
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