Salt water is also a good choice. I once setup a portable vertical antenna on the shores of Antelope island, a very small island in the Great Salt Lake, Utah, it did very well there. -- Paul (KG7HF)
Hola Eduardo, My daughter and I have spoken to you many times in the past. It seems maybe the valves have been damaged, I would have thought the two 47ohm in parallel would work as a replacement. You
Hello all, I am wondering if anyone knows how to use a grid dip meter to measure coax electrical length. Must I use a shorted half wave lenght and trim, or can I use an open quarter wave and trim? Ho
Hi Eduardo, Of course a simple dipole would work, but for gain, maybe a dipole beam might be better. I like to use a horizontal collinear, this is what I use on 20 meters. http://home.comcast.net/~kg
I've uploaded a new image with wires, loads, and transmission lines. I've also put up the model for anyone interested. http://home.comcast.net/~kg7hf/TheStation/20m_stacked_collinear.JPG http://home.
I must be subscribed to the wrong list. I didn't know this was only for antenna models, what a surprise, but then again, I've only been subscribed for about 2 years now, and seen maybe 10 messages
I'm trying to design an antenna, actually combine two already designed antennas to use a common feeder. The 40 meter antenna would be fed from a short 6" length of feedline from the 20 meter anten
Hi Guy, That is what I was thinking last night, that because the 20 is the second harmonic even with the traps, the close proximity of the 40 will cause problems. Separation of the antenna's seem
Hi Bob, I have to agree fully with Larry's (k0is) comments. It really depends on what you want to do. Height and the amount of ground radials play a major role. I currently have an 1100 foot ho
Hi Group, Using EZ-NEC, is it reasonable to model an open wire feed line, for example a 600 ohm ladder line using two parallel wire segments shorted at each end by two other wire segments, one end be
Hi John, Of course, higher seems to be better, and bigger also seems to be better to some extent. This might be sensory overload, but it does demonstrate what loop size and height can do to/for the
Hi group, I use EZ-NEC 5.0, but I'm wondering what the different sources mean and when they should be used. For example there is a selection for I, V, SI and SV . Over the past few years I have be
Hi Guy, Thanks for the reply. Yes, that makes sense, often I had not made models with multiple feedpoints so I didn't notice a difference between I/V. In many cases I was using SI/SV at non wire ju
hi guys, Last night I was able to do some searching in the eznec help. It did indeed answer a couple of my questions, i.e. using voltage or current sources interchangeably on single feedpoint anten