Subject: RE: [Repeater-Builder] Decibel dipole array sweeps
For a parallel-fed (aka binary-fed, corporate-fed, etc.) antenna, if all of
the elements are fed in-phase (i.e. the branches in the phasing harness are
all the same length), as it typical with most dipole arrays, there won't be
any
Did you test the db408 with both db404's harnessed and
working together?
No, I tested the upper and lower halves seprately. I have some used DB408's
(not the dual version) that I'll try to sweep later.
Hi Jeff, that's interesting data.
I was more curious whether or not you had any antennas easy to add to
the tests, or any locals nearby with different types of Sinclairs
around/available to add to the data while you have the test range
setup, so to speak.
Not important enough to go
On Sun, 22 Mar 2009, k5in wrote:
This is directed to you: If I have a DB413 and I am going to use it on
441.950 you are saying there will be some down tilt in the pattern?
This doesn't bother me. I am more curious than anything about this
antenna that is due to go up 140ft on a tower in a
On Mar 22, 2009, at 7:18 PM, n...@no6b.com wrote:
By now I've already managed to get the original PDF downconverted to
something everyone should be able to read. Then again, unless
you're going
to print it HTML is the most universal format.
Actually straight ASCII is the most universal.
On Mar 22, 2009, at 5:11 PM, Jeff DePolo wrote:
I have a Sinclair 8-bay with half-wave element to mast spacing
stored in the
Sitemaster, but it was swept from the far end of 600' of 1-5/8 with a
topside TX-RX crossband coupler. It's spec'ed for 406-512 MHz. I
can't
keep track of
Check the antenna for VSWR at that frequency BEFORE it goes up. It's
probably going to be borderline.
- Original Message -
On Sun, 22 Mar 2009, k5in wrote:
If I have a DB413 and I am going to use it on
441.950
At 3/23/2009 01:29, you wrote:
On Mar 22, 2009, at 7:18 PM, n...@no6b.com wrote:
By now I've already managed to get the original PDF downconverted to
something everyone should be able to read. Then again, unless
you're going
to print it HTML is the most universal format.
Actually
Thanks, Bob. Apparently you and I are in the same boat. I have the full
version of Acrobat 5 installed, and if I try to upgrade the reader only, it
corrupts the entire installation.
And I'm too cheap to go out and spend the $$$ for a new version. ;-)
Thanks!
Mark -N9WYS
-Original
At 09:01 3/23/2009, Mark wrote:
Thanks, Bob. Apparently you and I are in the same boat. I have the full
version of Acrobat 5 installed, and if I try to upgrade the reader only, it
corrupts the entire installation. And I'm too cheap to go out and
spend the $$$ for a new version. ;-)
Mark, my
At 09:01 3/23/2009, Mark wrote:
Thanks, Bob. Apparently you and I are in the same boat. I have the full
version of Acrobat 5 installed, and if I try to upgrade the reader only, it
corrupts the entire installation. And I'm too cheap to go out and
spend the $$$ for a new version. ;-)
Mark, my
At 3/22/2009 11:32, you wrote:
The document can be found here:
http://www.broadsci.com/Antenna Sweeps r1.pdf
I get a The file is damaged could not be repaired error.
Bob NO6B
n...@no6b.com wrote:
At 3/22/2009 11:32, you wrote:
The document can be found here:
http://www.broadsci.com/Antenna Sweeps r1.pdf
I get a The file is damaged could not be repaired error.
And I get a 404 Page not found error.
Paul
The link is broken if you try to use it as it came through..
the space in the file name is the killer...
http://www.broadsci.com/Antenna%20Sweeps%20r1.pdf
is the correct link
Doug
At 03:31 PM 3/22/2009, you wrote:
mailto:no6b%40no6b.comn...@no6b.com wrote:
At 3/22/2009 11:32, you wrote:
-Builder] Decibel dipole array sweeps
n...@no6b.com mailto:no6b%40no6b.com wrote:
At 3/22/2009 11:32, you wrote:
The document can be found here:
http://www.broadsci.com/Antenna
http://www.broadsci.com/Antenna Sweeps r1.pdf
I get a The file is damaged could not be repaired error
Jeff;
This is very interesting findings especially in that using
an antenna longer than your freq tends to exhibit down tilt... that
440 use of a 450 antenna seems to be working in the correct
direction. I for one found it very interesting to read
It may be real interesting to see
Page cannot be found using your fixed link.
Chuck
WB2EDV
- Original Message -
From: Doug Bade k...@thebades.net
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, March 22, 2009 3:54 PM
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
The link is broken due to the space
That's strange. I'm using Foxfire 3.0.7 and the original link was OK.
Joe
Doug Bade wrote:
The link is broken if you try to use it as it came through..
the space in the file name is the killer...
http://www.broadsci.com/Antenna%20Sweeps%20r1.pdf
, 2009 4:10 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
Jeff;
This is very interesting findings especially in that using
an antenna longer than your freq tends to exhibit down tilt... that
440 use of a 450 antenna seems to be working
:10 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
At 3/22/2009 11:32, you wrote:
The document can be found here:
http://www.broadsci.com/Antenna http://www.broadsci.com/Antenna Sweeps
r1.pdf
I get a The file is damaged could not be repaired
Joe;
The original posted file name had spaces in between Antenna,
Sweeps, and r1 ...and some or all windows client email programs
likley displayed as he sent it... Mine did but I spotted it as it
showed as fractured hyperlink... Foxfire my have corrected it in your
case. When I
...@yahoogroups.com] On Behalf Of Doug Bade
Sent: Sunday, March 22, 2009 4:10 PM
To:
mailto:Repeater-Builder%40yahoogroups.comRepeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
Jeff;
This is very interesting findings especially in that using
The link is broken due to the space in the name...
The actual url is
http://www.broadsci.com/Antenna%20Sweeps%20r1.pdf
Doug
this may be a dup.. my outbound mail seems to be randomly getting delayed..
At 03:31 PM 3/22/2009, you wrote:
mailto:no6b%40no6b.comn...@no6b.com wrote:
At
, 2009 4:22 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
Although, in some cases, the return loss (or VSWR) looks to be
acceptable I wonder what the take-off angle of radiation and
radiation
pattern looks like at frequencies out of it's
: Sunday, March 22, 2009 4:17 PM
Subject: RE: [Repeater-Builder] Decibel dipole array sweeps
For a parallel-fed (aka binary-fed, corporate-fed, etc.) antenna, if all
of
the elements are fed in-phase (i.e. the branches in the phasing harness
are
all the same length), as it typical with most
-Builder] Decibel dipole array sweeps
Although, in some cases, the return loss (or VSWR) looks to be
acceptable I wonder what the take-off angle of radiation and radiation
pattern looks like at frequencies out of it's design range.
73, Joe, K1ike
Jeff -
When you are testing next time, it might be interesting to see results of a
sweep using some feedline attached to the antenna. I have to wonder what
impact it may (or may not) have.
When you test with your instrument connected to the pigtail, are you
standing right there, or is the
An interesting project, I look forward to reading your report however your
link was incorrectly typed. Here is a corrected link;
http://www.broadsci.com/AntennaSweepsr1.pdf
Gary
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On
@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey
Sent: Sunday, March 22, 2009 4:08 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
Page cannot be found using your fixed link.
Chuck
WB2EDV
hoogroups.com mailto:Repeater-Builder%40yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
Jeff;
This is very interesting findings especially in that using
an antenna longer than your freq tends to exhibit down
tilt... that
440 use of a 450 antenna seems
).
--- Jeff WN3A
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey
Sent: Sunday, March 22, 2009 4:44 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array
Using the link Eric posted below, I got the same error message that Bob NO6B
got - file damaged and could not be repaired...
Mark - N9WYS
-Original Message-
From: Repeater-Builder@yahoogroups.com On Behalf Of Eric Lemmon
I got the same result. The link was parsed incorrectly. Try
Sent: Sunday, March 22, 2009 3:08 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Decibel dipole array sweeps
Using the link Eric posted below, I got the same error message that Bob NO6B
got - file damaged and could not be repaired...
Mark - N9WYS
-Original Message
At 3/22/2009 13:01, you wrote:
Boy, Yahoo really mangled the URL, even though I put it in angle brackets.
Let's try re-naming the file without spaces, maybe that will work...
http://www.broadsci.com/AntennaSweepsR1.pdf
Bob - the file opened fine for me, both locally and from the web site. I'm
On Sun, 22 Mar 2009 n...@no6b.com wrote:
Well, without a long explanation, I can't view files made for Acrobat
6 later. No way around it unless I want to lose PDF authoring
capability.
Buy a Mac and image the Windows box and use it in a virtual machine.
Then you can author in PDFs and the
: [Repeater-Builder] Decibel dipole array sweeps
In general, the loss in the feedline will only make the return loss look
better. If you have an antenna with a 14 dB return loss at the frequency
of
interest at the feedpoint, and connect it to a feedline that has 2 dB of
loss, the return loss
On Sun, 22 Mar 2009, Jeff DePolo wrote:
the elements are fed in-phase (i.e. the branches in the phasing
harness are all the same length), as it typical with most dipole
arrays, there won't be any uptilt/downtilt as you vary the transmitter
frequency outside of the design range a bit. No
On Mar 22, 2009, at 3:29 PM, Jeff DePolo wrote:
In general, the loss in the feedline will only make the return loss
look
better.
This leads to situations on poorly built systems where an antenna has
gone bad but the feedline is such poor quality, that the transmitter
is still quite
On Mar 22, 2009, at 12:32 PM, Jeff DePolo wrote:
The antennas I tested in this first batch are:
DB413, 450-470 MHz
DB408D, 450-470 MHz
DB411, 450-470 MHz
DB411, 406-420 MHz
By the way, I like it, Jeff!
Got any Sinclairs handy for a comparison between common brands?
--
Nate Duehr, WY0X
At 3/22/2009 15:37, you wrote:
On Sun, 22 Mar 2009 n...@no6b.com wrote:
Well, without a long explanation, I can't view files made for Acrobat
6 later. No way around it unless I want to lose PDF authoring
capability.
Buy a Mac
Of all the possible solutions, that is probably the most
I'm modeling a half-wave dipole with the bottom .25 wavelength (at
145MHz) above zero, with five meters added from the bottom. This
antenna, five plus meters above ground, shows that when
transmitting at
165MHz, the highest point of gain is a lower degree of elevation than
when
Sent: Sunday, March 22, 2009 6:52 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
On Mar 22, 2009, at 12:32 PM, Jeff DePolo wrote:
The antennas I tested in this first batch are:
DB413, 450-470 MHz
DB408D, 450-470 MHz
DB411, 450
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, March 22, 2009 4:22 PM
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
Although, in some cases, the return loss (or VSWR) looks to be
acceptable I wonder what the take-off angle of radiation and radiation
pattern looks like
Why not just include it with your article already posted? Just add the notes
along with it.
Chuck
WB2EDV
- Original Message -
From: Jeff DePolo j...@broadsci.com
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, March 22, 2009 7:11 PM
Subject: RE: [Repeater-Builder] Decibel dipole
I've had arguments with tower crews about antennas that are too good
when doing a system sweep. They would proudly state that the install
was really good because the Return Loss was 28 dB on a wide band 800Mhz
antenna that was only suppose to be about 14-18dB RL at the antenna.
Turned out to
...@yahoogroups.com] On Behalf Of Mark
Sent: Sunday, March 22, 2009 3:08 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Decibel dipole array sweeps
Using the link Eric posted below, I got the same error message that Bob NO6B
got - file damaged and could not be repaired...
Mark
On Sun, 22 Mar 2009, Jeff DePolo wrote:
Wait. You're saying that a center-fed dipole has a major lobe that's
not exactly perpendicular to the element? Something's amiss.
It's a theoretical antenna over a real ground. In free space, the lobes
are closer to zero, but even over a perfect
] On Behalf Of n...@no6b.com
Sent: Sunday, March 22, 2009 3:29 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Decibel dipole array sweeps
At 3/22/2009 13:01, you wrote:
Boy, Yahoo really mangled the URL, even though I put it in angle brackets.
Let's try re-naming the file
] On Behalf Of Chuck Kelsey
Sent: Sunday, March 22, 2009 7:18 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
Why not just include it with your article already posted?
Just add the notes
along with it.
Chuck
WB2EDV
- Original
On Sun, 22 Mar 2009, Gary wrote:
Bob,
Paste the link into your location bar then remove the '%20' groups of
characters from the link. The result should look like this-
http://www.broadsci.com/AntennSweepsR1.pdf
This works:
http://www.broadsci.com/AntennaSweepsR1.pdf
--
Kris Kirby, KE4AHR
On Sun, 22 Mar 2009, Jeff DePolo wrote:
Wait. You're saying that a center-fed dipole has a major
lobe that's
not exactly perpendicular to the element? Something's amiss.
It's a theoretical antenna over a real ground. In free space,
the lobes
are closer to zero, but even over a
On Sun, 22 Mar 2009, Jeff DePolo wrote:
Free space doesn't have a ground. Can you disable ground altogether
and see what the gain and pattern is?
Yes. It looks like what you'd expect a perfect antenna to look like.
What does it give you for the gain of a single half-wave dipole with
no
At 3/22/2009 16:23, you wrote:
Bob,
Paste the link into your location bar then remove the '%20' groups of
characters from the link. The result should look like this-
Not the problem. Acrobat 5 is as far as my home system
goes. Unfortunately the full version of Acrobat overrides any Reader
Free space doesn't have a ground. Can you disable ground altogether
and see what the gain and pattern is?
Yes. It looks like what you'd expect a perfect antenna to look like.
What does it give you for the gain of a single half-wave
dipole with
no ground or support structure?
n...@no6b.com wrote:
Not the problem. Acrobat 5 is as far as my home system
goes. Unfortunately the full version of Acrobat overrides any Reader
installation. Not Windows' fault, but Adobe's.
I do have a 1 GHz PIII backup system I could put the new reader on if I was
desperate, but not
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of n...@no6b.com
Sent: Sunday, March 22, 2009 8:30 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Decibel dipole array sweeps
At 3/22/2009 16:23, you
At 3/22/2009 17:44, you wrote:
Bob. Always the trouble maker.
Try this HTML version. It was produced by Microsoft Word which has the most
god-awful HTML generator on the planet IMHO. I make no guarantees as to its
readability.
http://www.broadsci.com/AntennaSweepsR1.htm
.
Brian, k5in
- Original Message -
From: Kris Kirby
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, March 22, 2009 3:37 PM
Subject: RE: [Repeater-Builder] Decibel dipole array sweeps
On Sun, 22 Mar 2009 n...@no6b.com wrote:
Well, without a long explanation, I can't view
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