Hello Mike, You would likely get more Topbanders to read and answer your posts if they didn't look like someone else's quotes. :-)
73, Mike W0BTU http://www.w0btu.com/Beverage_antennas.html On Sun, Aug 5, 2018, 1:27 PM Mikek <[email protected]> wrote: > On 8/4/2018 5:53 PM, Mikek wrote: > > A good reference for Beverage antenna length is by W3LPL, Search > > online for his patterns, F/B info. > > > > If a shorter Beverage wire length is used because of space > > restrictions, a near perfect feed and restive termination can > > appear as a low VSWR, over a reasonable frequency range. > > However here in Maine, the ground is typically not close to level > > in elevation , and with variations in soil conductivity, resonant > > lengths are beneficial.. > > > > One of the ways to make a wire look electrically longer is the use of > > covered wire. (Velocity factor that can vary with type of covering used). > > Also some have placed small lumped inducatances along the way,, > > Another used a slinky.. > > > > Basic understanding about cores that most, excepting mix 33, are > > inductive, So have a question for anyone who has tried it. > > > > Will adding many mix, 43, and 77 spaced cores with a few turns > > each along the Beverage wire , lower the basic frequency enough to > > be beneficial? > > > > > ************************************************************************************************************************************************** > > > > > > > I recently added 9 binocular cores (Fairrite # 2873000202) to my > > 253ft BOG. > > Before the Cores my velocity factor was .78 > > After installing the cores the VF was .67 > > So, I'm thinking it made my antenna seem to be 16% longer, or went > > from and apparent 324ft to 377ft. > > I was shooting for .55 and will add more cores when I get them. > > Even the the cores are binocular, I only made a single pass through > > one hole of the core. > > That equals about 8.9uh. > > You probably have this URL, it is the only info I can find. > >> https://www.w8ji.com/slinky_and_loaded_beverages.htm > > > > Mike Knowlton > > > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband
