Hi Vic, You have a perfect place, I love it. No.. not a lotta real estate.. but it is wonderful How about... a "a high as you can" vertical on the top of your "shack" to be.. with 30 - 40 radials laid out and held in place with sand bags, bricks, or the like.. maybe just tied to the edge... make them long enough to reach the edge of the roof. If you can getthe vertical to be 43 or so ft high.. that's even better. Base feed with an auto tuner. Second... a wire beam.. laid out at a convenient height on the big roof.. built to face East. or a J-K beam to face e-w. Look at the Great Circle map to face to where you want to talk tothe most. Yes.. it would take a bit of planning ahead... but you could even rotate it.. say for the all asian contest... or for the TX QP.. move it a day ahead of the event.For the domestic contests... face towards the middle of the country. No problem. The vertical will do dx very nicely from there... and the wire beam would do domestic nice too.Good L uck, Oh.. and for vhf.. a J-pole does great from that high. Have a great day, --... ...-- Dale - WC7S in Wy
> Date: Sat, 28 Sep 2013 11:37:32 -0700 > From: k2vco....@gmail.com > To: kl...@acsalaska.net; elecraft@mailman.qth.net > Subject: Re: [Elecraft] Antenna suggestions, resent > > Here is a diagram of my space (use fixed width font): > > ---------------------------- > | | | | > | | | | > | | | | > | ----------------- | > | | > | | > ---------------------------- > > The small rectangle on top is a small building (10'x20') on top of the > roof of the 10-story apartment building. Actually, it will be my bedroom > (and, I think, shack). The larger rectangle is the roof area at my > disposal. It is about 10' x 30' plus the areas at the side of the > building. The rest of my apartment is below the roof. > > I would love to put a little roof tower on the building with a beam on > it! But as far as I know, that is not allowed. > > I am thinking about verticals, about 3 fiberglass masts holding up a > shortened 40m dipole, etc. > > For 6 and 2 m I have 3 element beams which are small enough that they > will be allowed. > > On 9/28/13 8:01 AM, Edward R Cole wrote: > > Vic, > > > > Too bad you cannot consider a yagi for 20-10m. That would sit on a mast > > secured to the small roof-top building. So a 30x 10 foot space? I > > wonder if the 20x10 foot building extends beyond the 30x20 area? > > > > It it extends so total length is 50-feet You could put up a doublet > > across the length, either horizontal with 8 foot droop on both ends for > > full length half-wave on 40m or perhaps a pole in the center for > > inverted-V. Another idea is 50-foot with 8-foot legs at > > right angles but horizontal at the same height. Or consider a 120-foot > > horizontal loop if there are places for four support poles. Being on > > roof of ten stories means the wire does not need to be very high. > > > > An automatic tuner at the roof would finish off any multiband antenna > > with single coax run to shack. To add 6m/2m simple solution is a > > base-loaded 5/8 6m wave vertical (could be a mobile whip). They load > > fine on 2m as well (trick of VHF mobile stations). > > > > 73, Ed - KL7UW > > ---------------------- > > Date: Fri, 27 Sep 2013 21:47:41 -0700 > > From: "Vic, K2VCO" <k2vco....@gmail.com> > > To: elecraft Reflector <elecraft@mailman.qth.net> > > Subject: [Elecraft] Antenna suggestions, resent > > Message-ID: <52465f6d.9060...@gmail.com> > > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > > > I just realized that my previous message was sent in html format. Which > > means that the reflector stripped the text! That explains some of the > > answers... > > > > Here is what I meant to ask: > > ---------------------------------------------------------------------- > > > > I am moving to an apartment on the top floor of a 10 story building. I > > have access to the roof which has a 30' x 10' flat space. On one edge of > > this space is a building 9' high with a flat roof of about 10' x 20'. I > > can put up antennas on top of this little building and on the flat area > > mentioned above. > > > > But there is a catch: the antenna has to be either a wire antenna, or > > substantially vertical. If vertical, it can't exceed 29' in height above > > the roof of the small building. Beams not allowed! > > > > I want to operate on 40 through 15 meters. The antenna needs to be able > > to handle 1500w. > > > > I prefer horizontal antennas because of the extra gain and lower noise > > pickup. I prefer a balanced antenna because of noise and RFI > > considerations. But I'll consider other options if there are overriding > > advantages. > > > > Suggestions > > > > > > 73, Ed - KL7UW > > http://www.kl7uw.com > > dubus...@gmail.com > > "Kits made by KL7UW" > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > -- > Vic, K2VCO > Fresno CA > http://www.qsl.net/k2vco/ > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
