John, that 71 ft. vertical with the dimensions that you gave will NOT WORK for long. With a 75 mph wind the following sections will be overloaded by 600 to 800 % of the maximum yield strength of 6061
I have a four in line vertical array for 80 meters that is in construction. The verticals are .25 wavelength long and the seperation is .25 wavelength. Each has 50 .25 wavelength radials. I have meas
Some of you have asked for more of the details on the phased verticals so here it is. I have a four in line vertical array for 80 meters that have been constructed but not matched and phased yet. The
I am using a selsysn for an indicator on one of my antennas. Everything works OK now. However, I would like to get a second output so that I can use it for knowing the position of the antenna for whe
Adrian, I have the conversion kit but would not even give it to a friend. VE6FI and I spent a couple of days trying to get this conversion to work. We followed the book exactly but the results were n
John, I worked on one of those add on's on a A4S just two weeks ago for a friend. We took one 40 meter conversation kit down off of this antenna as the SWR was intermittent. We measured and installed
I am phasing a 4 element 80 meter vertical array and was looking for some software related to complex numbers. I have the ARRL Microsmith which will rotate the impedance through different length of c
I am doing some modeling on an end fire array with 4 in line verticals for 80 meters. The verticals are spaced 0.25 wavelength apart. I have modeled them with 90 degree phasing called quadrature feed
I was wondering what the process was for calibrating the Heath HM 2140 power meter for pep reading. I see 4 controls in the box. I have a reference Bird but I am missing the instructions on how to ca
Eugene, I think your approach to making connection with the cable is just fine. I wouldn't think you would have to get to exotic with the pads and all. I usually do is just coat the connection over t
I noticed in the books that an in line 3 vertical assenbly would have the following current magnitudes at a particular phase angle. My question is why is the middle vertical at an magnitude of 2 whil
Tom, I am presently building a 4 in line vertical array for 80 meteres and can offer the following: Structural program for calculating stresses is in Ham Radio Dec 98 by K5IU I use his spreadsheet wi
Well if the subject is 40 meter beams you can look at our homebrew 5 element full sized beam with a boom length of 60 ft. We did use it in the last FD as a 2E entry. We were trying to make the best o
As far as bolts through the mast to connect portions of the mast together, I do not think a straight bolt will be satisfactory as it well work loose. Using two will improve the situation. I prefer to
Hi, I was wondering if anyone has any software or knows where to find software that will convert from polar to rectangular coordinates and do division of complex impedances. Regards Denis Ve6AQ List
At VE6FI we have a 3.7-30 mhz log periodic on a 70 foot boom. I did model this antenna and found that at any frequency there are usually only 3 elements that are active. This would make it equivalent
I have just obtained a Megger for measuring resistance while applying 500 volts. It is one that you crank to bring the voltage up to 500 volts and has a resistance meter. It is made by Megger, works
On the wideband LPDA that I have modeled the gain is usually equivalent to a 3 element monobander. LPDA, I believe, are a bit difficult to build. What I suggest that you look at an OWA design. I mode