I find it way easier and much more straightforward to simply record the specific X and R at the feedpoint when you install the antenna. Then make it a habit of check that measurement once a year at t
Ed's reply seems completely reasonable to me. It is easy to do and you get a good idea about anything that might require some attention. -- Wes Attaway - N5WA Shreveport, LA -- ______________________
I agree although you might want to remove any matching devices. In my case, I shorten the loading wire on my inverted-L to add capacitive reactance and then shunt the feedpoint with an inductor. I g
Conversely, and this is a liberal arts guy talking , it would seem logical that as you laid down radicals, you could watch the R component, and when the R value curve flattened out "enough", you coul
And if you have an inexpensive VNA - you can run TDR function and probably get some idea of where the problem is. You can certainly tell if coax has been damaged mid run. ___________________________
It all depends on the difficulty/cost of adding more. The radiation resistance of a vertical, which represents radiated power, is a function of the vertical height, not the total length. There's a gr
K9YC: "The likely unknown here is the soil characteristic plugged into the model, as compared to what we have. :)" I'll use this as an excuse to plug my ground probe calculator. Build your own ground
Understood, Jim. Interestingly, I just found out that the ground conductivity in my area is probably very good, on the order of 2-4 millisiemens, which may reduce the need for a huge number of radial
Marginally related. In the README.TXT for Brian's Ground Probe Calculator 3.20 you'll find this statement: "Wavelength in soil is much shorter than in air." With EZNEC, including the now free v. 7.0
For US hams wanting to get a rough idea of where they land in the ground conductivity lottery, you can look at the high def. FCC map and either cheer or weep. But, keep in mind, the boundaries were d
By the way, your local soil map can be found at: https://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm Probably not very accurate, but a good approximation. Chuck W5PR _____________________________