Hi antenna challenged fellow hams. You can do your own stealth gutter
antenna these days.
Two easy ways: 1) Get a combination of metal gutter and one short
section of plastic gutter to join two metal halves of a dipole. Remember,
you can use shorter than quarter wave lengths of elements,
Looking like ELECRAFT should consider getting into the
STEALTH ANTENNA game. A stealth vertical perhaps, one
could just lean up against the home.
Or a gutter-shaped antenna, that would easily attach
to one's home front facia. There's certainly
interest and need for one.
Fred
N3CSY
In a message dated 10/27/06 4:38:23 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
The Diamond bottom tube may, (and likely) contains a broad band ferrite
cable choke.
Probably - to keep RF off the outside of the coax. Such a choke would cost a
few dollars at most.
Or there may be
[EMAIL PROTECTED] wrote:
In a message dated 10/27/06 4:38:23 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
The Diamond bottom tube may, (and likely) contains a broad band ferrite
cable choke.
Probably - to keep RF off the outside of the coax. Such a choke would cost a
few dollars
In a message dated 10/29/06 11:12:34 AM Eastern Standard Time,
[EMAIL PROTECTED] writes:
[EMAIL PROTECTED] wrote:
In a message dated 10/27/06 4:38:23 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
The Diamond bottom tube may, (and likely) contains a broad band ferrite
I'm surprised with all this talk of dipoles and doublets that no-one has
mentioned loops. I'm not an antenna expert, but it has always seemed to me
that the efficiency of an antenna is somewhat related to the amount of wire
in the radiating element.
You can get more wire in a loop round the
PM
Subject: RE: [Elecraft] Attic Antenna
I'm surprised with all this talk of dipoles and doublets that no-one has
mentioned loops. I'm not an antenna expert, but it has always seemed to me
that the efficiency of an antenna is somewhat related to the amount of
wire
in the radiating element.
You
Hi -
I notice Diamond Antennas - now offers a BB7V and
BB6W VERTICAL NO-COUNTERPOISE HF ANTENNA - for the ham
bands. They look to be built very well. The
BB6W version, offers a HORIZONTAL top section, up
above the antenna's loading coil. Whole thing mounts
on a single vertical pole, etc.
The
-Original Message-
Diamond Antennas - now offers a BB7V and
BB6W VERTICAL NO-COUNTERPOISE HF ANTENNA - for the ham
bands. They look to be built very well.
---
I would want a lot more info before spending any money.
The BB7V is priced at US$400. It's a 22 foot vertical aluminum
[EMAIL PROTECTED] wrote:
I would want a lot more info before spending any money.
The BB7V is priced at US$400. It's a 22 foot vertical aluminum radiator
with a nice mast clamp (mast not included) and a cylindrical feedpoint
device.
The big question is: What's in the feedpoint device?
It reminds me of the verticals Gotham made in the 1950s.
Bob, N7XY
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-Original Message-
From: [EMAIL PROTECTED]
It reminds me of the verticals Gotham made in the 1950s.
But it's very different.
The Gotham verticals were just 22 feet of tubing, some mounting straps,
and a big custom-made coil of B W miniductor. The only difference
between the
The Diamond bottom tube may, (and likely) contains a broad band ferrite
cable choke. Or there may be a combination trap/ loading coil such as used
on some tri band beams for multibands.
Stuart
K5KVH
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Post to:
Stuart Rohre wrote:
The Diamond bottom tube may, (and likely) contains a broad band ferrite
cable choke. Or there may be a combination trap/ loading coil such as used
on some tri band beams for multibands.
No way that a choke would produce the SWR curve shown in their spec
sheet. Whatever
-
From: Vic K2VCO [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net
Sent: Friday, October 27, 2006 12:01 PM
Subject: Re: [Elecraft] Attic Antenna
| [EMAIL PROTECTED] wrote:
|
| I would want a lot more info before spending any money.
|
| The BB7V is priced at US$400. It's a 22
I would want a lot more info before spending any money.
The BB7V is priced at US$400. It's a 22 foot vertical aluminum radiator
with a nice mast clamp (mast not included) and a cylindrical feedpoint
device.
The big question is: What's in the feedpoint device?
Sandy wrote of an earlier
In a message dated 10/27/06 6:38:11 PM Eastern Daylight Time, [EMAIL PROTECTED]
writes:
WARNING!
This same scheme (scam?) happened quite a few years ago. Don't remember the
name
of the device, but is was a black box type proprietary antenna
coupler.
You may be thinking of the
Oh yee of little faith, on non-counterpoise HF
Verticals! Some of those mentioned are real
junkers.
Back to subject - what type of ATTIC ANTENNAS are
good, for us living in restricted communities (no
antennas) - with attics?
BW makes a Folded Dipole, 7-30mhz, 45 feet long -
with supposed flat
I had some good laughs reading the review of the tuner. The comparisons
are quite favorable. Of course, they were comparing their product to a
halfway dipole. I guess that meant a dipole halfway assembled, or maybe
halfway burried. They didn't sayg. But anyhow, their pos is 80%-90% as
efficient.
Fred (FL) wrote:
Back to subject - what type of ATTIC ANTENNAS are
good, for us living in restricted communities (no
antennas) - with attics?
BW makes a Folded Dipole, 7-30mhz, 45 feet long -
with supposed flat swr? Like $245. Our attic antenna
needs to be pretty much left by itself - no
In a message dated 10/27/06 7:33:23 PM Eastern Daylight Time, [EMAIL PROTECTED]
ink.net writes:
Even honestly described and advertised HF verticals without a very very
very good radial system are terrible performers compared to a simple dipole.
I disagree!
The situation is much more
.
73 to all,
Sandy W5TVW
- Original Message -
From: Fred (FL) [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Friday, October 27, 2006 8:27 PM
Subject: Re: [Elecraft] Attic Antenna
| Oh yee of little faith, on non-counterpoise HF
| Verticals! Some of those mentioned are real
Fred, N3CSY, asked:
what type of ATTIC ANTENNAS are
good, for us living in restricted communities (no
antennas) - with attics?
--
I have and excellent results with doublets. That's a center fed wire as long
as I had room for in the attic. In an apartment that was at least 33
Whups... At 33 feet long my antenna was full sized for 20 meters, not 40
meters as I wrote. It was still quite efficient on 40 - only a tiny bit less
efficient than a full size antenna - and would work short skip on 80. I
could usually get between 40 and 50 feet up by making the bent ends of the
Larry originally asked about attic antennas and a
concrete tile roof.
I have both.
I am in Lot 1 next to the gate, and blackmailed my HOA
into outdoor HF antennas. I have a Cushcraft R7000 up,
which is a half wave trapped antenna, but no radials.
Works great.
But I also have antennas in my
I live in a restricted community and am thinking about putting a 20
meter dipole in the attic. I know most of the issues with doing this but
I don't know the effect the roofing material will have on my signal. The
roof is 1/2 in thick cement tiles. Has anyone had experience with this
setup?
I live in a restricted community and am thinking about putting a 20
meter dipole in the attic. I know most of the issues with doing this but
I don't know the effect the roofing material will have on my signal. The
roof is 1/2 in thick cement tiles. Has anyone had experience with this
setup?
I live in a restricted community and am thinking about putting a 20
meter dipole in the attic. I know most of the issues with doing this but
I don't know the effect the roofing material will have on my signal. The
roof is 1/2 in thick cement tiles. Has anyone had experience with this
Thanks for all of the great feedback. I am going to research some of the
antenna suggestions that I have received. I feel a lot more confident in
trying an antenna in the attic now.
I am currently building my K1. I have finished the receiver and am
starting the transmitter section. I will
Larry .
I have experience with a similar situation. I'm also in a HOA restricted
development. I put up an antenna in the attic here when I first started
operating from this QTH. Basically a 17 meter doublet with 300 ohm
ladderline feeder that I can load on all bands from 10 to 40 with the
30 matches
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