Mal, A good 5 8 9 signal here in Huntingdon..IO92WI ./ON 472. 73 de Tom G3RPV -- Original Message -- From: [email protected] mal hamilton To: [email protected] rsgb Sent: Saturday, Jun
G3JKV was right too. Please let us stop this discussion before more internet bandwidth is wasted. Such a discussion will not lead anywhere because of the laws of nature. It was stupid of me to enter
Hi Rik, Now I have had time to study your web page on 136 antennas, I have the following comments, which I hope you will find useful. 1. The reason that the antenna current decreases linearly to zero
Hello John Thanks for your comments. 1. The reason that the antenna current decreases linearly to zero at the end of the antenna, is because sin(x) = x approx for small values of x, and for most amat
Due to its directivity, a short vertical monopole has a gain of 2.6dB over a dipole (4.77dBi versus 2.15dBi for a dipole). Careful! Surely this assumes perfect ground, doesn't it? Even at HF, I think
Careful! Surely this assumes perfect ground, doesn't it? Even at HF, I think most amateurs would prefer to use a vertical dipole than a ground-plane antenna. Good point. I have been breaking my mind
ON7YD wrote: Now we take the real-world case and assume a loss of 100 Ohm (environement + coil). If we put 100W into this system we will have an antennacurrent of 1A and radiate 8.2mW (-42dB compared
At 12:09 9/03/00 -0000, G3XDV wrote: Hmmm. Well I think we do have to take earth losses into account twice. This is because it not only affects the ERP because of the effective resistance in series w
Hi all, Some time ago I wrote a story for SRAL magazine about (LF) progation terminology with a drawing or a sketch showing the proposed radiated components* near the radiating short vertical monopol
<< Due to its directivity, a short vertical monopole has a gain of 2.6dB over a dipole (4.77dBi versus 2.15dBi for a dipole). >> This is one point which may deserve some clarification. A real-world i
Oops! Between the time I composed my message and the time I finally reconnected in order to send it, Mike and others had already commented on the 2.6dB directivity. However, I believe my observation
Hi Rik, Mirrors don't really reverse left and right any more than they reverse top and bottom, what they really reverse is front and back. The word I think you were looking for is anti-phase. Don't w
Good point. I have been breaking my mind about that for some while. But it seems to me that we take the inperfect ground into account already with the ground-loss resistance, so do we have to take it
