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Antenna suggestions, resent

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Edward R Cole

Antenna suggestions, resent

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" <[hidden email]>
To: elecraft Reflector <[hidden email]>
Subject: [Elecraft] Antenna suggestions, resent
Message-ID: <[hidden email]>
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
[hidden email]
"Kits made by KL7UW"

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KD8NNU

Re: Antenna suggestions, resent

Look up a cobweb antenna, it's a folded dipole design that works quite well. I built one and I really like the performance.

Thanks
Don
Sent from my iPad

On Sep 28, 2013, at 5:01 PM, Edward R Cole <[hidden email]> 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" <[hidden email]>
> To: elecraft Reflector <[hidden email]>
> Subject: [Elecraft] Antenna suggestions, resent
> Message-ID: <[hidden email]>
> 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
> [hidden email]
> "Kits made by KL7UW"
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Vic Rosenthal

Re: Antenna suggestions, resent

In reply to this post by Edward R Cole

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" <[hidden email]>
> To: elecraft Reflector <[hidden email]>
> Subject: [Elecraft] Antenna suggestions, resent
> Message-ID: <[hidden email]>
> 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
> [hidden email]
> "Kits made by KL7UW"
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

daleputnam

Re: 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: [hidden email]
> To: [hidden email]; [hidden email]
> 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" <[hidden email]>
> > To: elecraft Reflector <[hidden email]>
> > Subject: [Elecraft] Antenna suggestions, resent
> > Message-ID: <[hidden email]>
> > 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
> > [hidden email]
> > "Kits made by KL7UW"
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > 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:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Mike Furrey

Re: Antenna suggestions, resent

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" <[hidden email]>
Sent: Saturday, September 28, 2013 2:49 PM
To: <[hidden email]>; <[hidden email]>
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: [hidden email]
>> To: [hidden email]; [hidden email]
>> 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" <[hidden email]>
>> > To: elecraft Reflector <[hidden email]>
>> > Subject: [Elecraft] Antenna suggestions, resent
>> > Message-ID: <[hidden email]>
>> > 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
>> > [hidden email]
>> > "Kits made by KL7UW"
>> > ______________________________________________________________
>> > Elecraft mailing list
>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> > Help: http://mailman.qth.net/mmfaq.htm
>> > Post: mailto:[hidden email]
>> >
>> > 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:[hidden email]
>>
>> 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:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Don Wilhelm-4

Re: Antenna suggestions, resent

In reply to this post by Vic Rosenthal

Vic,

If that were my situation, I would put up 2 inverted vees - at right
angles to each other. Each fed with ladderline.

A pole as high as you can manage right in the middle, and a pole in the
each corner of the larger building.
Arranged that way, you have room for 2 44 foot doublets (even if you
have to fold the ends down a bit).
The advantage of the 44 foot length is that it can be used for 40
through 10 meters with the only lobes broadside to the radiator.

To operate on 80 meters, lay 4 or more wires (more is better) on the
roof and use them as a counterpoise and tie the feeders together to
produce a top loaded vertical - it may even work on 160.

73,
Don W3FPR

On 9/28/2013 2:37 PM, Vic, K2VCO wrote:

> 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.

Richard Fjeld

Re: Antenna suggestions, resent

In reply to this post by Mike Furrey

FWIW, I worked a guy in Hawaii who had an arrangement I liked. He fed a vertical on the beach as the driven element. Then he used another vertical as either a reflector, or a director. He had sockets in a pre-measured radius around the driven element. When he wanted to aim his signal a certain direction, he would run out and change to the appropriate socket.

Dick,n0ce

----- Original Message -----
From: [hidden email]
To: [hidden email]
Sent: Saturday, September 28, 2013 1:57:54 PM
Subject: Re: [Elecraft] Antenna suggestions, resent

Go for the beam ... a pair of butternut verticals and phase 'em! ... maybe
three in a triangle for more directions.

73, Mike WA5POK

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

hf4me

Re: Antenna suggestions, resent

In reply to this post by Vic Rosenthal

IMHO - If wire, I would make a "fan dipole". Multiple dipoles (one length
for each band) connected together at the feed point and run together (a few
inches apart) for their full length. For the 40 meter portion if it is too
long just let the ends hang down as long as you are using fiberglass poles
(tie them so they don't fly in the wind) or bend them horizontally (do not
bend tighter than 90 degrees) instead of using coils as your efficiency will
be better and your power will not be restricted. 73, de Jim KG0KP

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Vic, K2VCO
Sent: Saturday, September 28, 2013 1:38 PM
To: Edward R Cole; Elecraft Reflector
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" <[hidden email]>
> To: elecraft Reflector <[hidden email]>
> Subject: [Elecraft] Antenna suggestions, resent
> Message-ID: <[hidden email]>
> 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
> [hidden email]
> "Kits made by KL7UW"
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>
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--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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