As mentioned on another post and subject, I am going to build a 40 meter W6NL Moxon Beam. The center of the Director is split and is not at ground potential. I see a lot of builders have used a two f
Unlike some more conventional Yagis the feedpoint impedance at the centre of the Moxon Driven element is very close to 50 Ohms; you just need a Common-Mode choke at the feedpoint to reduce the likeli
1. There is nothing inherently wrong with "coupling to ground" at the feedpoint. As long as whatever capacitance that may be there (which I'm not convinced would be significant anyway) is relatively
Most of the radiation comes from the current part of the antenna which is going to be close to the center point of the driven element. If you are using a U shaped channel 2 foot long at this area of
Ive used this antenna at K3LR. It works very, very well! Dont change anything and you will be very happy :) Best regards, Scott W3TX Most of the radiation comes from the current part of the antenna w
Scott, Thanks for your reply. However, I realize the antenna works very well. That is why I want to build one. But, maybe it can be made to work better. That's my point. Am I not thinking clearly on
Hello Lee: You keep talking about a Director on this antenna. There is only a Driven element and a Reflector. The W6NL Moxon is two elements. I did not use the channel from Cushcraft to support the e
Thanks Tim!!!! Yes I meant the Driven element! (Been so wrapped up in this boom mount thing.) OK on the G10. I have some G-10 around here close to 1/4 inch thick. (I etch a lot of G-10 for QRP projec
HI Lee: The plates are 12 inches long - 4 inches wide and 1/2 inch thick. I purchased them from McMaster Carr. The driven element has a 1 ft piece of solid fiberglass rod in the middle to hold the tw
Hi, Lee If you accept that the aluminum elements of a typical Yagi have very little loss due to resistance, then perhaps you can accept the possibility that a 2-foot long piece of aluminum channel do
You say you're not worried about capacitive coupling, but if there is any effect at all that is exactly what happens ... capacitive coupling to the channel. Possibly you're worried about the channel
Bud and Dave Gilbert, OK, I understand what you are saying, Bud. But what about the shielding effect? Taking this to an extreme, I could encapsulate the entire driven element into a hypothetical long
Hey Tim, What is the turning radius on this thing when it is done? Have you measured/calculated it? -- Charlie www.baysidephoto.com www.thegallos.com _______________________________________________ _
There isn't really a "shielding" effect, at least not in theory. If the driven element was entirely surrounded by an equal length tube the RF would merely be coupled to the tube and it would become t
Hi Charlie: I am sure I have it in my notebook, but it is not handy at the moment. All of the dimensions for the W6NL Moxon are on my web site, so it is very easy to calculate. 73, Tim K3LR --Origina
the antenna which is going to be close to the center point of the driven element. If you are using a U shaped channel 2 foot long at this area of the antenna, you will be pumping RF into the channel
I have built two of these antennas and I am very pleased. While I do not have an antenna range to measure pattern, they seem to be very solid performers. SWR is below 1.3:1 across the entire band. Th
Force 12, for many years, used ordinary gray PVC tubing, split lengthwise, to insulate its elements from the boom and any metallic mounting hardware. The element mounts are aluminum sheet hat section
Force 12, for many years, used ordinary gray PVC tubing, split lengthwise, to insulate its elements from the boom and any metallic mounting hardware. The element mounts are aluminum sheet hat section
I used gray PVC to insulate my homebrew 54' freestanding vertical at P40A and it worked perfectly, even with the strong UV. Using this material with U-Bolts is a good way to make an insulated element