Howdy all I'm putting my 3 40 meter phased verticals back up after the storms took them down. A question I have is, if I put my stubs back in the line, is it going to mess up the phasing? I'm using 1
Tom, Why not put the three verticals in a right triangle. You can remotely switch the phasing using voltage over the coax so it will beam four compass directions. Mine were [and will be soon] phased
Hi Don They are in a right triangle, but mine are switchable in 6 directions. I had them all set up before and they worked great, but the winter storm took them all down. I have 2 of them up now and
Hi Guys Can you explain the "right triangle." My understanding is that the three are in an equilateral triangle (60 degrees between each antenna). Bill W7VP __________________________________________
The 'right triangle' system utilizes two verticals per selected direction with the third 'floating'. The 'equilateral triangle' system uses all three verticals simultaneously, but requires much more
Any triangle system can be used with either two or three elements energized - check with ON4UN's book for details. In either case, the most practical and versatile system for beam switching is the eq
Comments inserted below: Most practical? It requires separate control line for .2db additional in any one direction, but narrows the beamwidth [with reference to 1/2-power points] to do this, making
<When all three elements are used, usually one is driven with 100% current, and the other two are driven at the same phase with about 50% current each. The beam directions are off the top or the bott
Don: What you are describing sounds like simply two 2-antenna systems placed 90 degrees to each other where on of the antennas is common to both. I conclude that from your statement that there are 4
Depends on the spacing of the antennas. If they are closer than 1/4 wavelength, then you can get a very narrow beam with fairly high gain. Think of a W8JK turned on it's side. There are, of course, t
When using pairs of elements with the same spacing and phasing, and the third element disconnected, an equilateral triangle array and a right triangle array will have exactly the same gain and beamwi
I would qualify that with "using a simple switching/phasing system". If you have fully adjustable phasing networks, the performance of the two systems (right angle or equilateral) would be comparable
Yes, I meant they are in an equilateral triangle. Had a brain fart. Lots of postings on this subject, but nobody has yet answered my original question. I'll post it again. I have 2 stubs, separtated
What are the stubs for? What are they tuned to? Why would you have a 1/4 wave phasing line on a single vertical? Or are you saying that the stubs are separated by 1/4 wave on the feed line to the ver
For interstation interference reduction Tuned to the CW part of 40 I have a line from my rig to a stub, 1/4 line to the next stub, then to the antenna Tom W7WHY ______________________________________
Coax stubs? Like the ones used as a trap for other bands? Or, are they part of the tuning network? Either way, they'll have some inductance or capacitance, and so, will change the phase. The real que
Hi Tom, They should have no effect on antenna performance if they are where I think they are, that is on the feed line coming from your transmitter and not on the phasing line in the vertical network
Hi Gary Yep, they are on the line between the transmitter and the "T" fitting to the network. I tried them out last night (with 2 of the 3 verticals) and didn't seem to make much difference in the SW