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Hi ! Tnx for visiting my page. I've been off the air for about 20 years and recently returned in the tail end of 2011.

 

I'm in an apartment building and have the good fortune of having a close friendship with the landlord who has permitted me to put up a 40 meter dipole.

 


 

 

 

I have a degree in Electrical Engineering from CCNY and am well aware of the power losses that occur in transmission lines. Unfortunatley many amatuer stations loose a considerable amount of power before it reaches their antenna. I'm getting all over the world with this dipole and am very happy with its performance. I attribute the good performance to the care I used in the construction of the antenna system.

A point that I consider critical and would like to emphasize with fellow hams that are also using dipoles with ladder lines is the importance of maintaing a distance between the ladder line and all metallic surfaces.

If you look to the left of the above picture you can see how I've used pvc piping to route the 450 ohm ladder line in order to keep it at least 1" from the poles and exterior of the building to maximize power transfer from the radio to the antenna.

 

Here's some more pictures below of the closeup of the installation.

 

 

 

 

Below is from the roof going along side down the building into the balun. Notice the distance is always maintained between the ladderline and the structure.

Out of the balun I used LMR 400 ultra low loss coax. Hope this may help someone with their installation as in ham radio we all learn from eachother.

 

 

Again tnx for visiting ..........73's

6677825 Last modified: 2015-08-31 04:54:13, 3079 bytes

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