It's probably not a big deal if an antenna is slightly unbalanced and there is some resulting common mode current on parallel wire line, if the circuit transforming the parallel line Z to 50 ohms unb
Actually the open wire lines at medium wave BC stations exciting verticals are all, as far as I know, unbalanced. See for example the line shown here at KFBK, operating phased Franklins: (A genuine F
Hi Andy, That's a good question and as I am not an expert I can only venture a guess: The system might be balanced if the feedlines came away from the towers' mid-points at a 90 degree angle with the
Nice coincidence that this should come up now. I bought what must be one of the early models in the flea market at Dayton this year. I put the coil in series and the cap to ground and added doorknobs
I can only suggest McMaster-Carr off hand: http://www.mcmaster.com/#pulleys-and-blocks/=28wms2 73 rob k5uj _______________________________________________ ____________________________________________
If you already have an old HyTower sitting around it's yours to wreck if you want to but I find the idea of stripping a HyTower and turning it into a 1/4 w. vertical for 80 a waste of a good multiban
A few years ago I put up a 230 foot long horizontal loop fed with 600 ohm ladder line. It was roughly in the shape of a quasi trapezoid-rectangle and was ~ 25 feet up. I used it mostly on 80 and 40 m
Ed, As another fellow said, it would probably be better to more heavily load it at the top and tune it at the base with a capacitor or something other than an inductor. In any event, I have a suggest
I bought 4 galv. steel 4' guy anchors last month over the web with no problems. Actually there is one problem but it's not related to security: You order something from them, but hear nothing back un
A few weeks ago I looked at four broadcast ATUs that had been removed from a four tower DA. These were designed for 1 kw by KIntronic. Each was in a wx proof aluminum cabinet about the size of a 3 or
Penninger Radio ( http://www.penningerradio.com ). Charles Penninger will dial you right in. Sections up to 24 feet. 1/8 or 1/4 wall. wide wide range of o.d. Rob K5UJ ________________________________
Jorge: It's not my intent to get into a "testimonial war" so I'll freely state that I have ordered from DX Engineering before, and the cardboard box they used to ship my purchase in was of the best q
My experience with the horizontal loop has led me to conclude that it is a good antenna on its one wavelength band and 2 and maybe even 4 w/l, provided the loop geometry is achieved, i.e. 3 or 4 or m
I think the sensitivity of balanced antenna systems to their environments is exaggerated. I have a 130 foot center fed dipole up 50 feet that I run the W7FG ladder line to. The ends dangle down aroun
Never used bungee cord with antenna rope on trees. How long does it hold up out in the wx? Not long I would think but since I never tried it I thought i'd ask. tnx, 73 Rob K5UJ ______________________
Correct. I often get the feeling a lot of hams think that broadcasters and other professionals work in this bullet proof utopia of immunity to direct hits. Not true. They do indeed take several good
Rodger, Elevated verticals with elevated 1/4 w. radials will work better on the HF high bands than ground mounted verticals partly because they are elevated enough to clear obstructions that attenuat
I don't think there is any relevance in comparing an inverted V to a vertical dipole. More important is the comparison between vertical monopoles and vertical dipoles. See this paper by Gandhi, Lazzi
Sorry the link I posted previously had a blank character that did not hotlink. This should work: http://www.ece.utah.edu/~ece3300/Labs/lab3/MONOPOLE%20ANTENNAS.pdf 73 Rob K5UJ _______________________
I have done business with Davis RF and based on that I think it is safe to say that they offer a quality product at a good price. Which brings me to the next point, to the ham who asked for advice on