[Elecraft] Antenna suggestions, resent
mikefurrey at att.net
mikefurrey at att.net
Sat Sep 28 14:57:54 EDT 2013
Go for the beam ... a pair of butternut verticals and phase 'em! ... maybe
three in a triangle for more directions.
73, Mike WA5POK
--------------------------------------------------
From: "Dale Putnam" <daleputnam at hotmail.com>
Sent: Saturday, September 28, 2013 2:49 PM
To: <elecraft at mailman.qth.net>; <k2vco.vic at gmail.com>
Subject: Re: [Elecraft] Antenna suggestions, resent
>
> 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.vic at gmail.com
>> To: kl7uw at acsalaska.net; elecraft at 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.vic at gmail.com>
>> > To: elecraft Reflector <elecraft at mailman.qth.net>
>> > Subject: [Elecraft] Antenna suggestions, resent
>> > Message-ID: <52465F6D.9060505 at 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
>> > dubususa at gmail.com
>> > "Kits made by KL7UW"
>> > ______________________________________________________________
>> > Elecraft mailing list
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>> >
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>>
>> --
>> Vic, K2VCO
>> Fresno CA
>> http://www.qsl.net/k2vco/
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