Key blanket, Kale and Booty Monster were just relating a story of what Kale has done with some antennas he made. Where is the money issue you are so bent out of shape about?
I have thought about how one of these coil type antennas would react with an effective ground plane up about 30' high also. I wonder if a well-designed coil would help control the reactance and allow us to feed at the base with a 50 ohm match? Is it possible to find 50 ohms of resistance at resonance in a ¼ wave whip without changing the nature of the antenna?
I can get close, but I find it a bit difficult to do with a 1/4 wave SS whip even with small extensions trying to add reactance and still reach resonance at 50 ohms impedance. I believe the reason is because the 50 ohms point of resistance in a resonant 1/4 element is not quite at the open end bottom where we typically feed it, and when we add inductive reactance to overcome the capacitance that a 102" whip shows, the 50 ohm tap point moves and we have no control over that placement unless we change the nature of the whip to some form of matching device in series with the element. So my question was, how do guys ever reach the magic flat match everyone talks about with a 1/4 wave whip?
I find in a 1/4 wave whip tuned to resonance in 11 meters, that about the best resistance you will find at the base is in the area of 35 ohms and if you do anything more to reach pure resistive and move the resistance up towards 50 ohms you are just adding loss to do so. If this is so, then maybe a coil, if effective, can do what it takes to overcome this result. If not, then maybe it is better to live with a bit of reactance and try for 50 ohms of resistance for our match. For me, such results must lower the radiation resistance in the radiator a bit and that probably is not a positive. So, we have to find another way of affecting reactance in the whip and still keep a 50 ohm tap point at the base. Could it be that a coil in series with the radiator can do this? Maybe Kale can tell us if that is what he finds with his technical approach to antennas. And if so, does this then make up for some of the shortcomings for a shortened radiator.
Blanket, if I were going to do the project being discussed here, I too would do it differently. But, I would like to hear some more about results and factors affecting those results, rather than your pathetic words about what you think personally about Kale, his antennas, his idea, and how much money it cost.
Check under the blanket and see if there is a burr there.
I have thought about how one of these coil type antennas would react with an effective ground plane up about 30' high also. I wonder if a well-designed coil would help control the reactance and allow us to feed at the base with a 50 ohm match? Is it possible to find 50 ohms of resistance at resonance in a ¼ wave whip without changing the nature of the antenna?
I can get close, but I find it a bit difficult to do with a 1/4 wave SS whip even with small extensions trying to add reactance and still reach resonance at 50 ohms impedance. I believe the reason is because the 50 ohms point of resistance in a resonant 1/4 element is not quite at the open end bottom where we typically feed it, and when we add inductive reactance to overcome the capacitance that a 102" whip shows, the 50 ohm tap point moves and we have no control over that placement unless we change the nature of the whip to some form of matching device in series with the element. So my question was, how do guys ever reach the magic flat match everyone talks about with a 1/4 wave whip?
I find in a 1/4 wave whip tuned to resonance in 11 meters, that about the best resistance you will find at the base is in the area of 35 ohms and if you do anything more to reach pure resistive and move the resistance up towards 50 ohms you are just adding loss to do so. If this is so, then maybe a coil, if effective, can do what it takes to overcome this result. If not, then maybe it is better to live with a bit of reactance and try for 50 ohms of resistance for our match. For me, such results must lower the radiation resistance in the radiator a bit and that probably is not a positive. So, we have to find another way of affecting reactance in the whip and still keep a 50 ohm tap point at the base. Could it be that a coil in series with the radiator can do this? Maybe Kale can tell us if that is what he finds with his technical approach to antennas. And if so, does this then make up for some of the shortcomings for a shortened radiator.
Blanket, if I were going to do the project being discussed here, I too would do it differently. But, I would like to hear some more about results and factors affecting those results, rather than your pathetic words about what you think personally about Kale, his antennas, his idea, and how much money it cost.
Check under the blanket and see if there is a burr there.
it won't be that vertical ground plane setup!