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Author Topic: 450u all ladder line antenna  (Read 1658 times)
KT0DD
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Posts: 284




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« on: March 21, 2012, 06:06:41 AM »

Has anyone built antennas using all 450u ladder line for restricted spaces? I have really limited space and was going to build a "dipole type antenna" with 450 line for the legs and tie the ends together to make an extremly folded configuration.

If i cut 2 sections of 450 ladder line approx 35' each, feed one leg of each section and tie the far ends of the sections together, will it work?  Thanks for any input.  Todd
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WB2WIK
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« Reply #1 on: March 21, 2012, 11:06:05 AM »

What you propose won't work well; however what's shown in this article does, and it's even shorter, if 40m operation is what you're after:

http://www.af2cw.com/license/dipole.pdf

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WA4FNG
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« Reply #2 on: March 21, 2012, 04:55:13 PM »

You know, with only 22.5' per leg, you could use crappy poles to make a 40m rotary dipole using that technique.
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N8TI
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« Reply #3 on: March 21, 2012, 07:51:20 PM »

I always wondered what would happen if I put a 40 meter dipole on the same mast as my quad. Would it interfere with the workings of the quad?

Joe
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W5DXP
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« Reply #4 on: March 22, 2012, 06:23:49 AM »

Has anyone built antennas using all 450u ladder line for restricted spaces?

http://www.w5dxp.com/ShortFD.htm
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KT0DD
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« Reply #5 on: March 23, 2012, 08:01:49 AM »

My Mistake...I forgot to mention I was seeking 75m operation with a good Ten Tec 238C L network tuner.  I think I will try the W5DXP suggestion and adjust the lengths with the formulas listed in the article to 75M operation. Right now, anything is better than not being on the air.

73,  Todd - KT0DD
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WX7G
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« Reply #6 on: March 23, 2012, 08:08:04 AM »

Has anyone built antennas using all 450u ladder line for restricted spaces?

http://www.w5dxp.com/ShortFD.htm

I like your shortened antenna.
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