Hi & Thanks Yuri. That's good info to know. I had wondered about that actually...
I may be able to get the hz portion over to a far away tree, just slightly lower than the 35' peak of the first tree, instead of sloping it back to earth. I am limited in what I can do, hi ! Appreciate the input. Mike VE9AA ---- Yuri Blanarovich <[email protected]> wrote: > Hi Mike, > > from your description, I think you would be best off not to fold back > the top wire, but try to "go away" horizontally as much as possible. > Folding back in "U" manner makes the current/radiation from the top half > cancel portion from the fed portion. > > If you want to enhance vertical polarization and lower angles, try to > use "T" loading, that cancels most of the high angle horizontal > radiation. > > You might be more efficient to use loading coil (and make it work on 80m > as a trap) at the top and shorten the loading end of wire. > > I have great results with my Inverted Vee in a Tree, top at abt 40 ft, > with ends drooping down and going horizontal at about 10 ft. I have high > water table. I am surprised how well it works, suspect that ends are > acting as "radials" to the sloppy top fed vertical, no stinkin baluns, > perfect 1:1 50 ohm match. > > 73 Yuri, VE3BMV, K3BU.us > > > > On Sat, Feb 28, 2015 at 01:39 PM, Mike & Coreen Smith VE9AA wrote: > > > de VE9AA > > > > > > I know inverted L's have been hashed out quite a few times on this > > list, and > > I have gleaned some knowledge. At my previous QTH I had a 5/16th WL > > one > > which seemed to work tons better than my current one, even though I > > was not > > up over 40' high. > > > > > > As it happens, on my current property I don't have any towers, nor > > tall > > trees so I have a general question. > > > > > > As far as a 127' inverted L goes, do I have anything to gain by > > sloping the > > "vertical" portion of the wire slightly up to a short treetop, vs. > > going > > nearly vertical, then the rest horizontal? > > > > > > Example: > > > > I have a 35-40' tree nearish to where my coax exits the ground from an > > underground run. I slope it "up" so essentially I have likely close > > to 50' > > of "vertical" then the remainder meanders through some shorter > > treetops and > > comes back to ground rather quickly (unfortunately it's more an > > inverted U > > than L). I have a few thousand feet of radials mostly in the southern > > portion of the field under the "horizontal section". A 800pf Cap is > > at the > > base and my SWR is around 50-60Kcs at the 2.1:1 pts. I seem to do > > quite > > well into w1,2,3,4,8 and at times western EU/Carib. Anything outside > > that > > sucks. That tells me I probably have gobs of high angle radiation. > > > > > > Have I anything to gain by putting the coax directly under the tree, > > going > > perfectly vertical for 37-ish feet, then, sadly, pretty much "down to > > the > > ground" for the "horizontal" section same as the original? > > > > > > (hope this ascii art works) > > > > > > Ie: This is what I am doing now (wire is around 65*-70* vertical or > > so_) > > > > ___ > > > > / \ > > > > / \ > > > > / \ > > > > > > > > but I wonder of this is any better > > > > > > __ _ > > | \ > > > > | \ > > > > | \ > > > > > > > > > > Lastly, I could go farther away from the tree and try to get 80-90' of > > sloping wire (likely closer to 45*) and then have the remainder droop > > itself > > back to Earth. > > > > > > _ _ _ _ > > / \ > > > > / \ > > / \ > > > > / > > > > > > Anyone have a skyhook for sale? > > > > > > > > Thanks for any insight. > > > > > > Mike VE9AA FN66na @ 660' ASL.rocky ridgetop. > > > > > > Mike, Coreen & Corey > > > > Keswick Ridge, NB > > > > > > _________________ > > Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ Topband Reflector Archives - http://www.contesting.com/_topband
