I was wondering what the center frequency was and the band width THAT'S WHY I ASKED IF IT WAS USABLE ON SSB.
I had 7 over 7 skeleton-slot beams made in England in the late 1960 and I'm WELL aware of that array. As for BIG WHEELS had them too a stacked pair and have given thought to building another pair IF I don't stack 2 more KU4AB's the ones i have now show a fairly even pattern maby that's from stacking them. It's interesting you went with the skeleton-slot antenna we have a guy on our Tampa bay SSB net using one with VERY good results. Thanks Skip i'll be looking to see how you are using the very good skeketon-slot antenna ! Bruce --- Skip KH6TY <[EMAIL PROTECTED]> wrote: > > First, let me say thanks to all who were > interested enough in the protocol issue to offer > suggestions > > >Usable on SSB ... ?????? I have worked New York > state from tampabay on USB with stacked ku4ab > squailos. > > I am not sure I understand Bruce's puzzlement. The > subject antenna is derived from the > horizontally-polarized "skeketon-slot" antenna of > the early 50's, and is usable for SSB because it is > horizontally polarized, which is the convention for > CW and SSB weak signal activity on 2m. > > Even a simple dipole can work long distances > during E-skip or tropo conditions, but our task is > to provide sufficient antenna gain for reliable > flatland communications over 100 miles without > having to rely on propagation as an assist. I also > have stacked KU4AB square loops, which I started out > with on 2m, but this antenna outperforms those by a > significant margin of almost 5 db. In actual tests > over 150 miles between my 13B2 to a single KU4AB > loop mounted on a mobile truck compared to the > skeleton-slot antenna mounted on the same truck, SSB > signals that were not understandable on the KU4AB > loop were 100% copiable on the skeleton-slot antenna > on the same vehicle at the same height (no > enhancement present). > > In addition, if you make careful tests of the > KU4AB loop, you will probably find that the pattern > is not very omnidirectional, but has deep nulls and > one of the nulls on mine measured almost 6 dB. > Therefore, a bi-directional antenna like the > skeleton-slot is statistically almost as > "omnidirectional" as the KU4AB square loop. The "big > wheel" would probably be a better choice than > stacked KU4AB loops, and is used on many > horizontally polarized beacons, but I have not > actually tested one. My tests are made using a 2m > beacon located at 30 feet, 8 airmiles away. My > antenna design is just a simpler, and cheaper ($25), > way to make a "skeleton-slot" antenna. > > If you are interested, check out this excellent > article on the skeleton-slot antenna: > http://www.ee.surrey.ac.uk/Personal/D.Jefferies/antennexarticles/qloop.htm > ____________________________________________________________________________________ Got a little couch potato? Check out fun summer activities for kids. http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&cs=bz
