Thread closed so we don't thrash it any more..
73,
Eric
Mooderator
/elecraft.com/
On 12/10/2018 1:32 PM, Ron Genovesi wrote:
Veered oh yes.
Worse than that, it been literally beat to death! Many times over.and over and
over
Ron Genovesi
N3ETA
Sent from my iPhone
On Dec
Veered oh yes.
Worse than that, it been literally beat to death! Many times over.and over and
over
Ron Genovesi
N3ETA
Sent from my iPhone
> On Dec 10, 2018, at 7:20 AM, Bob McGraw K4TAX wrote:
>
> Before Eric steps in, let me say "let's end this discussion. It has veered
>
Yes, and to think I so deftly avoided using that "b" word that ends in
"n" in the original post. The original post was just an observation
that antennas do not need to be perfect to work ... and sometimes work
well. I'm beginning to think that any post on any ham radio subject
will
Before Eric steps in, let me say "let's end this discussion. It has
veered too far from the original posting".
73
Bob, K4TAX
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
The most extensive measurements of real live dipoles using chokes and baluns
has been done by Rick DJ0IP. He made hundreds, if not thousands of
measurements with asymmetric dipoles. He measured common mode current with the
feeder straight down, off-centre and reversed on several bands to test
It doesn't sound like you have a clue how WELL they work, though,
relative to not using one at all or using one that has verified specs.
Lots of stuff "works" but doesn't work as well as it should.
Personally, I don't see the merit in preferring not to know, and it's a
good thing for the
On 12/9/2018 5:15 PM, Bob McGraw K4TAX wrote:
I don't know a darn thing about them other
than...they work.
Define "they work." :) They don't blow up? You get signal through them
to the antenna? They reduce common mode current? They reduce RX noise?
You make QSOs with them in line?
I'm the one that made the recommendations. Other than the two Balun
Designs units and the #8232 units from The Wireman being used with my
station..I don't know a darn thing about them other
than...they work. I'm not using a 1115T balun. Measuring the
baluns and putting
Robert: Yes, most of the radiation from a conductor originates in the
high current section(s) of the conductor, and for a half-wave dipole,
that's the center, low impedance part. The sag will lower the center,
ergo the "gain" will decrease. Whether or not it's enough to be
noticeable is
I wonder if anyone using or recommending products like this have ever
measured them. They are not easy to measure. You can't measure them
accurately with a single-port antenna analyzer.
N6KT, a member of our contest club is building a station in the
Caribbean and asked me to measure a Balun
I will soon publish a new Choke Cookbook for chokes wound on a
single #31 2.4-in o.d. core with RG400, a #12 teflon pair, and a
#12 THHN pair. I am no longer recommending chokes wound with
RG8/11/213 size coax
Dang, I'm going to have a TON of spare 2.4" cores left over from
my old-style
Balun Designs, both 1:1 and 4:1 for use with tuners.I have both because I
also have a folded dipole that I feed direct.
I suggest you give the folks at Balun Designs a call and discuss your exact
needs. Take their advice.
Also see the DJ0IP site for details on baluns. Just Google DJ0IP.
Several reasons why this is a bad idea. First, resonant dipoles are a
much closer match to 50 or 75 ohm coax than to 300 ohm line. Low dipoles
are closer to 50 ohms, higher ones closer to 75 ohms.
Second, the MOST important place for a choke is at the feedpoint. The
feedline is part of the
Robert,
That depends on what you want to achieve. If it is more gain broadside
(perpendicular to the antenna) then the answer is yes. On 80 meters the
160 meter elements alone will be Two Halfwaves in Phase and will have 2
to 3 dB of gain broadside to the antenna.
Of course, that gain
The 80 / 40 M fan dipole fed with 300 ohm transmitting line {The Wireman
#562} and then use the balun at the point where the feed line enters the
house would be preferable. That configuration reduces the weight of
the balun on the antenna. From the balun to the station, use a good
quality
Ron...
Would such an antenna cut for 80m, fed with ladder-line, and used on
40m, be a better performer on either band than an 80-40m fan dipole fed
with 72ohm coax? Leaving all other extraneous but influencing parameters
aside. I have the second antenna; the weight of all that wire and the
: Friday, December 07, 2018 9:18 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Less Than Perfect Antennas [was Flumoxed]
While I agree with Jim's information, I would point out the flat dipole will
have 3 dB more signal off of its broadside 0/180° as compared to that of a
inverted V
While I agree with Jim's information, I would point out the flat dipole
will have 3 dB more signal off of its broadside 0/180° as compared to
that of a inverted V dipole off of its broadside. At the same time, the
inverted V dipole will have about 4.5 db more signal off of its ends
90/270° as
On 12/7/2018 12:55 PM, Dick Dickinson wrote:
Why is there so much promotion of dipole antennas over inverted vee type
antennas?
As has been noted, an inverted vee is a compromise dipole -- the sort of
thing you can rig with a single support. A flat dipole with its center
at the same height
: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Less Than Perfect Antennas [was Flumoxed]
A flat dipole will have slightly more gain than an inverted V at the same
height. The inverted V will also have to be a bit longer.
73,
Scott K9MA
--
Scott Ellington. K9MA
--- via iPhone
> On De
There is really little to no difference other than the manner to which
one is supported. Otherwise, it is relatively easy to steer the quasi
pattern of an Inverted V just by moving the ends around. The dipole,
well a bit more of a challenge to steer. Plus a dipole is the isotropic
A flat dipole will have slightly more gain than an inverted V at the same
height. The inverted V will also have to be a bit longer.
73,
Scott K9MA
--
Scott Ellington. K9MA
--- via iPhone
> On Dec 7, 2018, at 2:24 PM, Dick Dickinson wrote:
>
> Oh…I guess I tend to think of
A dipole is *anything* with two ends [poles]. A water molecule is a
dipole, as is a bar magnet, Inverted V, and Extended Double Zepp to
name a few.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 12/7/2018 12:55 PM, Dick Dickinson wrote:
Why is there so much promotion of dipole
Oh…I guess I tend to think of dipoles as being linear in configuration…such as
horizontal dipole, etc.
Dick – KA5KKT
---
An inverted vee IS a dipole.
-John NI0K
Dick Dickinson wrote on 12/7/2018
From forty till twenty or so years ago, I lived in a suburban
townhouse, with no antennas allowed. My solution then was a 40-meter
inverted vee with fanned 20 and 10-meter elements, and W9INN coils on
the end of the 40M elements to give me 80M. I was working on 5B DXCC in
those days, and
An inverted vee IS a dipole.
-John NI0K
Dick Dickinson wrote on 12/7/2018 2:55 PM:
Why is there so much promotion of dipole antennas over inverted vee type
antennas?
Kindly,
Dick – KA5KKT
__
Elecraft mailing list
Why is there so much promotion of dipole antennas over inverted vee type
antennas?
Kindly,
Dick – KA5KKT
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
The center-fed dipole fed with open wire balanced line may be the second
oldest antenna design, the first being the Marconi-T. Its only real
disadvantage is that today's solid state transceivers are all 50 ohm,
coax oriented and some form of balanced to unbalanced and possibly
impedance
As Don has said, a good dipole as high as possible, even in an attic, fed
with balanced line will out perform most other compromise multiband
antennas.
While being retired in Ecuador I had the advantage to try several antennas.
The best over all was a fan dipole for 40, 30, 20,and 17 fed with RG6
For what appears to be a modest antenna installation, look at the
obtained results of KE4PT. Where on QRZ.COM he writes;
""At home, my Icom706mkIIg pushes 100 W through a coax-coil + ferrite
current choke to an AH-4 automatic tuner unit at the bottom of a 4.3 m
tall, 14.6 m long dual
On 12/6/2018 5:56 AM, ANDY DURBIN wrote:
Yes, I make this point to anyone interested in getting started on HF. I
worked my first 50 or so countries with 100 W and a 20 m dipole at 20 ft agl in
my attic.
Anyone who has seriously contested and analyzed their results will tell
you that 2dB
That statement is true - however ---
The problem is not radiation from the conductor, but how to get the RF
current into the conductor and not in other unintended places.
For those who want to build their own antennas, I suggest starting with
a resonant dipole fed in the center. That
"RF current into a conductor will radiate, even if it's at eye level."
Yes, I make this point to anyone interested in getting started on HF. I
worked my first 50 or so countries with 100 W and a 20 m dipole at 20 ft agl in
my attic. If you want an example of working DX with hopeless antennas
73,
Fred KE7X
From: elecraft-boun...@mailman.qth.net on
behalf of Fred Jensen
Sent: Wednesday, December 5, 2018 5:42 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Less Than Perfect Antennas [was Flumoxed]
It seems these days that the "Amateur media," which inc
Likewise here for VP6D-- got them on all five bands of my indoor
'cobweb' antenna, 10m thru 20m, 100 watts CW.
73,
Drew
AF2Z
On 12/05/18 19:42, Fred Jensen wrote:
It seems these days that the "Amateur media," which includes all of us
conversing on the air or via email lists, tends to dismiss
What a great comment, Fred! We have a guy in our area that tells
everyone (including newcomers to the hobby) that G5RV antennas don't
work. Funny how I've sure worked a lot of folks that was using one.
73, Jim W5LA
On 12/05/18 6:42 PM, Fred Jensen wrote:
If we want younger people to try out
Perfect is the enemy of good enough.
73 -- Lynn
On 12/5/2018 4:42 PM, Fred Jensen wrote:
It seems these days that the "Amateur media," which includes all of us
conversing on the air or via email lists, tends to dismiss LTPA [less
than perfect antennas] which may be discouraging some
It seems these days that the "Amateur media," which includes all of us
conversing on the air or via email lists, tends to dismiss LTPA [less
than perfect antennas] which may be discouraging some Technicians from
trying out their HF allocations on 10, 15, 40, and 80. Hard core DX'ers
and
38 matches
Mail list logo
