On Sun, 11 Oct 2009, Jacob Suter wrote:
> I thought the prefered poor-man's repeater antenna was a J-pole?
Single folded dipole IMO.
> Out of curiosity - are the 'square dipole' (or 'gapped loop' or whatever
> they want to call them) antennas usable for repeater use? Example:
> http://www
.
David
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Lemmon
Sent: Sunday, October 11, 2009 11:45 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Antenna question
John,
My suggestion is
Kris Kirby wrote:
>
>
> On Sun, 11 Oct 2009, Thomas Oliver wrote:
> > Buy a commercial one and cry once.
>
> What he said. Give until it hurts, but a DB-224 or a Super Stationmaster
> with upper brace are a necessity in environments where ice damage is a
> possible. Do it once, do it right.
>
> O
On Sun, 11 Oct 2009, Thomas Oliver wrote:
> Buy a commercial one and cry once.
What he said. Give until it hurts, but a DB-224 or a Super Stationmaster
with upper brace are a necessity in environments where ice damage is a
possible. Do it once, do it right.
Or do it every week/month/year. Are
John,
My suggestion is simple: Find the money to buy a decent antenna. Unless
your time has no value, your gasoline is free, and you enjoy tower climbing,
don't mess with cheap antennas.
The great majority of available funds should go into the antenna, feedline,
and outdoor mounting hardware- t
John,
It sounds like you already have a G7? How old is it and how does it
operate? I am trying to figure out how it stood up to your WX Elements. My
two cents
.In WNY on the highest hill in Allegany County I had and still
have a G7. I had it up for about seven years at 160 until I got a used
sta
W3ML wrote:
> Hi again,
>
> We are looking to replace that used antenna after getting 100 feet of new
> Andrews 1/2" donated to our club.
>
> Now I realize that the DB type antenna is the best, but we do not have 800
> bucks to buy one.
>
> So, my question is should we just get a new G7-144 to re
Buy a commercial one and cry once.
Failing to have the funds you may want to build a colinear out of coax
sections. It don't get much cheaper than that.
http://www.repeater-builder.com/antenna/wa6svt.html
tom
> [Original Message]
> From: W3ML
> To:
> Date: 10/11/2009 10:09:31 AM
> Subj
Impedance is impedance. The MFJ analyzer should be as accurate for that antenna
as any other.
However, the analyzer's signal is very small, and at any site where other
transmitters are nearby, the analyzer's internal SWR bridge can be fooled by
signals other than its own, leading to erroneous r
Ian,
As some others have pointed out, I too have seen a little odd response
from the MFJ analyzer too. I very recently used one to toy around with
several DB420 antennas. The MFJ wasn't "wrong" really, but it did not
give the same response that two different SWR/Wattmeters powered by
two
--- On Fri, 9/5/08, Ian Miller <[EMAIL PROTECTED]> wrote:
> From: Ian Miller <[EMAIL PROTECTED]>
> Subject: [Repeater-Builder] Antenna question
> To: Repeater-Builder@yahoogroups.com
> Date: Friday, September 5, 2008, 9:43 AM
> Our group has a Sinclair 8 dipole array for UHF.
>
> The repeater
I have seen problems with using analyzers on dipole arrays, hopefully the
bridge will give you a better report. Also might be an open connector as
mentioned.
Don Kirchner
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Ian Miller
Sent: Friday, September 05, 200
How much line loss do you have? It could simply be an open at the connector
on the antenna end. Try checking with an ohmmeter on the ground. It should
show as a short from the center pin to the connector shell.
Chuck
WB2EDV
- Original Message -
From: "Ian Miller" <[EMAIL PROTECTED]>
For what it's worth, I'll add my two cents:
After assembling and tuning a 2 meter Ringo antenna, I wiped it down with
rubbing alcohol and then sprayed it with urethane spar (marine) varnish, which
I bought at K-mart. I used an entire can (12 ounces maybe). The antenna
performed well through twe
On Sun, 4 May 2008, Bruce Bagwell wrote:
> OK guys, along this same line, I have a VHF all copper J-Pole and plan
> on building UHF all copper J-pole. Is common clear lacquer OK to
> prevent corrosion on the copper elements? I have used automotive type
> black silicone under 2" wide electrical
At 5/3/2008 11:44, you wrote:
>At 08:44 AM 05/01/08, Ron Wright, N9EE wrote:
> >
> >(big chunk cut out)
> >
> >One other plus for
> >folded dipole antennas, the fiberglass antennas are much more prone to
> >become toothpicks with a lightning strike where a 224 will most likely
> >survive.
>
>Plus
At 08:44 AM 05/01/08, Ron Wright, N9EE wrote:
>
>(big chunk cut out)
>
>One other plus for
>folded dipole antennas, the fiberglass antennas are much more prone to
>become toothpicks with a lightning strike where a 224 will most likely
>survive.
Plus in windy areas they need a top support to preven
Nate,
My problem is not the harness, but the exposed dipoles.
73, ron, n9ee/r
>From: Nate Duehr <[EMAIL PROTECTED]>
>Date: 2008/05/01 Thu PM 07:00:56 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] antenna question
>
>Ro
s.com
Subject: Re: RE: [Repeater-Builder] antenna question
Paul,
I talked with my friend about the DB224. He said as you did. When you get
it you have to tighten the hardware. Some was more than finger loose. This
is for all antennas, but more for DB Products.
He has used the Scotchkote. He lik
Ron Wright wrote:
> I'm giving myself about a week to think on the DB224 or Station Master. I
> like both, but lean toward the Station Master.
Heh, my "usual" comment... everyone will be expecting this one...
"Have you considered a Sinclair with the harness internal to the antenna?"
I still t
Have you considered a DB-264E?
73 de N5NPO
Norm
- Original Message -
From: Repeater-Builder@yahoogroups.com
To: Repeater-Builder@yahoogroups.com
Sent: Thu May 01 18:43:03 2008
Subject: Re: RE: [Repeater-Builder] antenna question
Paul,
I talked with my friend about the DB224. He said
week to think on the DB224 or Station Master. I like
both, but lean toward the Station Master.
73, ron, n9ee/r
>From: Paul Finch <[EMAIL PROTECTED]>
>Date: 2008/05/01 Thu AM 10:44:37 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: RE: [Repeater-Builder] antenna questi
Paul Finch wrote:
> I have posted this several times on R/B and will do it again. When you get
Maybe it should be an article? :-)
Nate WY0X
install. All of what you did was done, but not sure about this antenna.
73, ron, n9ee/r
>From: Paul Finch <[EMAIL PROTECTED]>
>Date: 2008/05/01 Thu AM 10:44:37 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: RE: [Repeater-Builder] antenna question
>Ron,
>
>I a
PROTECTED] On Behalf Of Ron Wright
Sent: Thursday, May 01, 2008 9:39 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] antenna question
hi all,
I am about to replace a DB224 side mounted at 1175 ft above ground. The
antenna is close to the Gulf, 0.5 mi, and think the salt
hi all,
I am about to replace a DB224 side mounted at 1175 ft above ground. The
antenna is close to the Gulf, 0.5 mi, and think the salt air got to it. It has
been up about 12 years and now has an SWR of 2:1. The coverage is very
noticeably less.
I am thinking of a Super Station Master fibe
At 07:00 PM 04/21/08, you wrote:
>We are looking at setting up a basic (I know there is no such thing)
>repeater. What I need to know, if you do not have a duplexer to run
>your antenna through, but have two antennas, with one on the TX and
>one on the RX how far apart do they have to be to be abl
t: Re: [Repeater-Builder] Antenna Question
It depends on band, split, power, and antenna gain.
On Tue, 22 Apr 2008 02:00:23 -
"Christopher Hodgdon" mailto:chris.hodgdon%40kaufman-ares.org"[EMAIL PROTECTED]>
wrote:
> We are looking at setting up a basic (I know there is n
Christopher,
According to my CommShop program, a 144 MHz repeater with a 50 watt
transmitter and a receiver having 0.3 uV sensitivity will require around 90
dB of isolation to avoid desense with a typical receiver. That isolation
can be achieved with about 220 feet of vertical separation or about
It depends on band, split, power, and antenna gain.
On Tue, 22 Apr 2008 02:00:23 -
"Christopher Hodgdon" <[EMAIL PROTECTED]>
wrote:
> We are looking at setting up a basic (I know there is no
>such thing)
> repeater. What I need to know, if you do not have a
>duplexer to run
> your anten
At 10:07 AM 3/25/2008, you wrote:
>Maybe that's what he has, even though he said it wasn't a DB products. But
>he said antenna rod, not tubing. Was that particular model made with rod?
Chuck - have been told by someone else that it is a Sinclair. I can
find no tag or ID on it that tells me that
08 7:57 AM
Subject: Re: Re: [Repeater-Builder] Antenna question
> There is a DB224 with internal harness. Not made for Ham band, but for
> 150-160, etc.
>
> 73, ron, n9ee/r
>
>
>
>>From: Larry Wagoner <[EMAIL PROTECTED]>
>>Date: 2008/03/24 Mon PM 05:41:52 CD
There is a DB224 with internal harness. Not made for Ham band, but for
150-160, etc.
73, ron, n9ee/r
>From: Larry Wagoner <[EMAIL PROTECTED]>
>Date: 2008/03/24 Mon PM 05:41:52 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] Antenna question
>
Than it's not a SRL-224. On those, the element attaches directly to the mast
(and the harness is external).
Chuck
WB2EDV
- Original Message -
From: "Larry Wagoner" <[EMAIL PROTECTED]>
To:
Sent: Monday, March 24, 2008 7:36 PM
Subject: Re: [Repeater-Builder] Anten
Could you find it on the Sinclair web site? How about a picture of one of
the elements? You can email one to me.
Chuck
wb2edv at roadrunner dot com
- Original Message -
From: "Larry Wagoner" <[EMAIL PROTECTED]>
To:
Sent: Monday, March 24, 2008 7:28 PM
Subject: Re: [
At 05:48 PM 3/24/2008, you wrote:
>Is there a blob of heat-shrink tubing at the middle of the element -
>furthest away from the mast?
One other thing ... the arms holding the dipole away from the mast is
only about 8 inches long - and extends to both the inside and outside
of the dipole.
Not su
At 05:48 PM 3/24/2008, you wrote:
>Is there a blob of heat-shrink tubing at the middle of the element -
>furthest away from the mast?
Nope - just aluminum rod
Larry
N5WLW
Monday, March 24, 2008 6:41 PM
Subject: Re: [Repeater-Builder] Antenna question
> At 05:37 PM 3/24/2008, you wrote:
>>You may have something else. The SRL-224 has an external harness.
>
> Hmmm - this thing has a harness interior to the mast and which runs
> through the center of the
At 05:37 PM 3/24/2008, you wrote:
>You may have something else. The SRL-224 has an external harness.
Hmmm - this thing has a harness interior to the mast and which runs
through the center of the arms which hold the bays.
Ideas?
Larry
N5WLW
You may have something else. The SRL-224 has an external harness.
Chuck
WB2EDV
- Original Message -
From: "Larry Wagoner" <[EMAIL PROTECTED]>
To:
Sent: Monday, March 24, 2008 6:09 PM
Subject: [Repeater-Builder] Antenna question
>I have what may see to be a dumb question ...
>
> I
At 02:24 PM 2/1/2008, you wrote:
>Hi Steve,
>
>
>
>The Diamond and Comet antennas will probably only last one or two
>seasons in your weather! I could write two pages of faults in
>construction on these brands. Just not build sturdy enough. They don't
>last long here in Michigan. I am in the Detro
Hi Steve,
First, avoid using LMR-400 for duplex use. This and 9913 are not good
for duplex. Aluminum shield and tinned copper braid rubbing together
and setting up corrosion causing noise. This is not a very long run,
try and get some 1/2" hardline, you will not be disappointed. Spend al
: Saturday, January 26, 2008 2:59 PM
Subject: Re: [Repeater-Builder] Antenna question for the forum.
If either takes a lightning strike the fiberglass will explode. I have had
that happen with both.
Check into Tram antennas. they seem electrically and mechanically similar to
the diamond but
If either takes a lightning strike the fiberglass will explode. I have had
that happen with both.
Check into Tram antennas. they seem electrically and mechanically similar to
the diamond but are a lot cheaper!
WB5OXQ
- Original Message -
From: w2sxk
To: Repeater-Builder@yahoogr
You'll hear this from others -- DO NOT use the LMR-400 cable in duplex
situations.
This subject comes up about every other week here.
Chuck
WB2EDV
- Original Message -
From: "w2sxk" <[EMAIL PROTECTED]>
To:
Sent: Friday, January 25, 2008 4:43 PM
Subject: [Repeater-Builder] Antenna qu
Hi Rod,
That antenna we started using for our Passport system here in Oregon and had
many problems with the antenna. It will eventually fail you. We use
exclusively the Telewave ANT150D antenna & have had NO problems.
Mike
Oregon Repeater Linking Group
Mike Mullarkey
-Original Message-
If you have your wind averages sticking a Big ole stick in the sky I found
this web site useful in planning wind loads.
try http://www.championradio.com/tn-topten-mistakes.html
Good place for anyone to start.
I searched MSN and used the words Radio + Antenna + Wind + Load
there is some stuff
Yes they do.
Chuck
WB2EDV
- Original Message -
From: "mike" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, December 21, 2004 3:42 PM
Subject: Re: [Repeater-Builder] antenna question for 2M ham. . .
>
>
> Sinclair makes excellent dipoles. We switched to the
Sinclair makes excellent dipoles. We switched to them several years ago
and never looked back.
http://www.sinctech.com/
Mike
K6MJU
>
>
> OK.
>
> One of the repeaters I help maintain (145.170 located in
> Connellsville, PA on the mountain) recently lost an antenna in the
> wind storms that hit
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