Re: Topband: Question...

2015-03-02 Thread Gary Smith
Mike, don't know your "support" system as regards trees around you but if you can get to your radial plate, the "spud gun" I made works perfectly. look at my qrz page for the photo & info. You wouldn't have to do as much as I did & some use a valve like a ball valve to launch the projectile. A

Re: Topband: Inverted L height vs. length.

2015-03-02 Thread ve9aa
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 inp

Re: Topband: Inverted L height vs. length.

2015-03-02 Thread Yuri Blanarovich
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 theĀ fed portion. If you want to enhance vertical po

Re: Topband: Modeling "Ground" and losses

2015-03-02 Thread Richard Fry
Is it conventional to compare the surface wave fields at a distance so near the Radial length and the wave length? I chose a horizontal plane distance that would be just a bit into the far field radiation of that system, so as to minimize groundwave propagation loss. Greater distances would