BUILDING LAYOUT W.P.JACKSON PDF

Considerations of site selection are included in this book for speculative builders who buy land and build houses for sale. The cost of the building site is not a construction cost unless the house is built for sale. This chapter will serve as a guide to evaluating site costs, which include purchase price of the site, recording and legal fees, engineering fees for the survey, interest, taxes, liability insurance and other expenses incurred before the house and lot are sold. All too often the builder is content to build the house without considering serious disadvantages of the site. A wise builder considers many conditions that add to the value of the finished home.

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I think the reason you are seeing the NEC error is that by default 4NEC2 opens the last antenna you were trying to simulate. If you are beyond this stage and have specific questions about entering antenna simulation input or interpreting results, you can ask them here and someone will likely be able to point you in the right direction.

I just pulled this up in the tree today. Your name or email address: I understand that my comment is too generalising, just an impression, but it is annoying me most of all there.

Calculated inductance is I can see the list of files of various kinds, like this: Why so many and what to do with them? Maybe it is something like C: Tutorials on how to use 4nec2. How high up should I pull this antenna? Because the choke is so critical, I decided to model several different versions and mis-tunings to see the effects. You will need to know this eventually, but in my opinion, doing this at the beginning before you know what you are trying to analyze makes it more confusing.

Similar Threads how can i use 4nec2 source code in matlab 0. It would be good to read how to enter antenna data, but rather than enter a whole antenna file, just modify something you think you understand and see if it does what you think it will.

A command box will open temporarily to show progress of the simulation. Look at the tjtorial text file and see if you understand some of the syntax and meaning of the lines in the 4neec2. Thanks ahead of time for your input. By continuing to use this website, you agree to their use.

But rather than using another wire, realize that I already have a wire coming back down from the feed point, namely tuttorial outside of the co-ax feed itself. This is probably the main downfall to this antenna design because it depends so strongly on getting this choke right. The more inductance the better for these tasks, but we have to build the inductor, either air-core or with ferrite, to hang on the feed line and there will be capacitance.

Dec For this antenna, I also optimize for the antenna gain at 12 degrees elevation. How can I tune 4ned2 Unlike a simple choke on a feed to keep the RF out of the shack, the choke for this application has a much more difficult job to do.

The programmers tutorisl abstract some of the complexity so it seems more intuitive, but I find the 4NEC2 to be a pretty solid tool. I try to express the dimensions as functions of things I might like to change, for example the height of the top of the antenna.

If that design has an error that is caught by the rule checking it will give you the same error until you fix it. AF modulator in Transmitter what is the A? Email required Address never made public. Thank you in advance.

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Building Layout by W. P. Jackson (1979, Paperback)

Chapter 1 The Transit A transit is used to measure horizontal and vertical angles. A theodolite is essentially a more precise transit. Instead of a vernier scale, a theodolite is equipped with an optical micrometer scale. Figure shows the accuracy of these readings. The theodolite has an optical plummet, and the sensitivity of the level tube is usually 45", or better.

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Building layout

I think the reason you are seeing the NEC error is that by default 4NEC2 opens the last antenna you were trying to simulate. If you are beyond this stage and have specific questions about entering antenna simulation input or interpreting results, you can ask them here and someone will likely be able to point you in the right direction. I just pulled this up in the tree today. Your name or email address: I understand that my comment is too generalising, just an impression, but it is annoying me most of all there. Calculated inductance is I can see the list of files of various kinds, like this: Why so many and what to do with them? Maybe it is something like C: Tutorials on how to use 4nec2. How high up should I pull this antenna?

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