> > 1. for 80m phased verticals that are 1/2 wave apart (66 feet),
That is 1/4 wave separation - not half-wave. One half wave on 80 is roughly 139 feet (984/3.55/2 = 138.6 feet). Since you are using 1/4 wave spacing and a PVS-2 (which is a quadrature device if I remember correctly), two /14 wave cables (about 54' each when the velocity factor for foam is included) should *easily* reach the midpoint of the array. 73, ... Joe, W4TV On 11/17/2012 6:56 PM, DALE LONG wrote:
Until recently, I had phased verticals on both 80m and 160m and lots of beverages. (this was in a woods, and not my property) Then the loggers came and destroyed all. In addition to the antennas, the phasing lines were torn up, and broken and needed replacement. For 160m I use the Christman method with .71 and .84 wavelength lines. For 80m I use a Comtek PVS-2 controller. In replacing the 80m phasing lines today I made a stupid mistake, I dont know what I was thinking, but I carefully measured and soldered two identical 1/4 wave lengths of new coax. I tested them on my AIM 4170 and they were nearly identical, exactly on the design frequency. Then I went to install them and guess what...of course they were too short. I have worked with phased verticals before and I know that you often need to use 3/4 wave phasing lines, but I was too intent on measuring and soldering and making the repairs. So now I have two questions. 1. for 80m phased verticals that are 1/2 wave apart (66 feet), what will be the pattern? It's not the same as 1/4 wave spacing, so what really is happening? 2. what is the best length of phasing line to use. Should I use 3/4 wave phasing lines? Should I avoid using 1/2 wave phasing lines? Thanks Dale - N3BNA _______________________________________________ Topband reflector - [email protected]
_______________________________________________ Topband reflector - [email protected]
