I've removed thousands of feet of LMR-400 feedline from
radio sites as a process to source and eliminate IMD, mixing
gremlins and unwanted effects. Most all of it was in
duplex service, but not every example.
I believe the issues with LMR were resolved years ago
Chuck. Can you refresh the
Each of the repeater receivers would provide audio and
a cor logic to one of the eight LDG Voter inputs. You
might consider the cor logic being a valid CTCSS (PL)
detection, the carrier squelch COR logic or an AND
version of both.
There are logic enable lines on the Voter so you can
turn
Given the fact that a voter still requires an outboard repeater controller for
other needed functions, and is designed to select a receiver based on S/N ratio
rather than a preset hierarchy, would it really be a good choice for this
application?
A new LDG voter lists for $319 and still
Heliax for the transmission line. Superflex heliax for jumpers. RG-400 (not
LMR-400, there is a huge difference) can be used for short jumper runs. RG-400
has a brown Teflon jacket and two layers of silver-plated braid. There are
other cables that are acceptable, but these are my favorites.
In case you haven't been to this site, there is more reading than you can shake
a stick at regarding repeaters:
http://www.repeater-builder.com/rbtip/
Chuck
WB2EDV
- Original Message -
From: Michael H. Cox
To: Repeater-Builder@yahoogroups.com
Sent: Monday, January 04, 2010
Hello,
Was wondering if anyone happened to know whether there was a general rule of
thumb regarding the minimum frequency seperation required between the high side
and low side frequencies when retunning these for the 800 - 900mhz section of
the band.
The manufacturer has long since left the
At 1/3/2010 21:54, you wrote:
For connection between duplexer and radios I like 1/4 Superflex, but
RG400 or RG142 is also great. To a duplex antenna for short runs those
same cables could be used, keeping loss figures in mind. Otherwise
appropriately sized Heliax or equivalent cables should
Check your email. I sent you a reply direct.
73
Wayne, wa5luy
--- In Repeater-Builder@yahoogroups.com, kc7stw kc7...@... wrote:
Hello all in the group.
I am looking to build as close to a factory MSR 2000 repeater station as I
can. I am looking for some cards.
1) Squelch gate,
1) CW
MICHAEL L. GARBER
1410 WAREHIME RD.
WESTMINSTER, M.D. 21158
( N3KTX ) 443-604-8133
From: tait700 cscan...@tpg.com.au
To: Repeater-Builder@yahoogroups.com
Sent: Mon, January 4, 2010 8:42:51 AM
Subject: [Repeater-Builder] Flat pack mobile
Chuck Kelsey wrote:
Yes, it said that in the article. However, the article went on to say
that some of the ham dealers sold it for duplex service all the time,
so the writer concluded (somehow) that it was OK to use. Go figure.
Chuck WB2EDV
Yeah-an ARRL staff writer wrote that? No wonder!
Correct. And the vendors in question are likely advertisers in QST whom they
don't want to offend.
Chuck
- Original Message -
From: wd8chl wd8...@gmail.com
To: Repeater-Builder@yahoogroups.com
Sent: Monday, January 04, 2010 12:55 PM
Subject: Re: [Repeater-Builder] Mastr II mods and
Does anyone have an archive of 73? If so I am hoping to get scanned from the
October 1980 edition A Computer-Controlled Talking Repeater - Part I:
Introduction by Ed Ingber, WA6AXX starting on page 124.
Michael Cox wrote:
Controller - I recommend a NHRC model that plugs into the Systems board,
or, one of the Pion Simon models that plug into the card cage.
http://www.nhrc.net/ge-stuff.php
http://www.pionsimon.com/products.htm
It looks like I can use the NHRC-4/M2 to make it a linked
Paul Plack pl...@... wrote:
Given the fact that a voter still requires an outboard
repeater controller for other needed functions, and is
designed to select a receiver based on S/N ratio rather
than a preset hierarchy, would it really be a good choice
for this application?
The voter
Michael Cox wrote:
Will this Duplexer work with the Mastr II repeater?
http://cgi.ebay.com/UHF-50W-6-CAVITY-DUPLEXER-FOR-REPEATER-FREE-TUNING
http://cgi.ebay.com/UHF-50W-6-CAVITY-DUPLEXER-FOR-REPEATER-FREE-TUNING_W0QQitemZ350300447727QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item518f88a3ef
AA8K73 GMail wrote:
Here is an attached scan, 2.59 MB.
Wow, an IMSAI for development.
That brings back memories.
Mike - AA8K
I remember reading it the first time around. It was the work which
eventually evolved into the Advanced Computer Controls (ACC) RC-850.
Fun reading... Thanks
Hey guys,
I am working on a project and am wondering if anyone has done this.
Here's the proposal, to setup a dispatch center for an FD, where the
dispatchers can sit at home and work the entire thing.
This is not a very busy department, that's why they thought it would be good
to do it.
I've done
Boy, where to begin.
First, I'd check with the insurance carrier regarding your proposal to
locate dispatch in a private home. I can see all sorts of snarled lawsuits
when something goes wrong. Maybe someone loosing their home in the suit as
well.
From a technical standpoint, you need
check out the IP-223. it may fit your needs.
http://www.northms2way.com/IP-223_BROCHURE.pdf
On Mon, Jan 4, 2010 at 3:03 PM, Jed Barton j...@jedbarton.com wrote:
Hey guys,
I am working on a project and am wondering if anyone has done this.
Here's the proposal, to setup a dispatch center for
Ok. Thanks. As I'm sure everyone does, trying to do this as cheap as
possible. I was hoping it would be good, but won't so I won't get it.
Thanks,
Michael H. Cox
michaelh...@gmail.com
-Original Message-
From: Kevin Custer kug...@kuggie.com
Date: Mon, 04 Jan 2010 15:27:02
To:
IRLP.net
Talk to Dave C.
Dave has some systems like you are thinking of doing . its a private IRLP
system
what I hear it works very well
Rick
On Mon, Jan 4, 2010 at 4:15 PM, Chris Robinson kf6...@gmail.com wrote:
check out the IP-223. it may fit your needs.
You'll note that the manufacturer is not suggesting that you utilize the
Internet for this device. It is marketed for use on a private LAN/WAN.
Chuck
WB2EDV
- Original Message -
From: Chris Robinson
To: Repeater-Builder@yahoogroups.com
Sent: Monday, January 04, 2010 4:15 PM
So you would route and forward 911 calls to someones house?
Are we talking about controling the radio and the console or just the console ?
Does the radio interface to the console ? ( BTW I assume this is an onscreen
console or virtual console not a real nuts and bolts thing which makes it a
Jed;
There are certainly options to pass
radio audio and keying over the internet in VOIP
or equivalent scenarios. I would also mention
there are several agencies who have regulations
on how calls are answered and dispatched... Your
solution would seem to require some approvals if
tell me about this system a little bit.
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey
Sent: Monday, January 04, 2010 4:25 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] dispatch
On Mon, Jan 4, 2010 at 10:29 AM, wd8chl wd8...@gmail.com wrote:
Michael Cox wrote:
Controller - I recommend a NHRC model that plugs into the Systems
board,
or, one of the Pion Simon models that plug into the card cage.
http://www.nhrc.net/ge-stuff.php
the phone system we're thinking of going with is a system called ring
central.
It's a system i am very familiar with, and have a ton of experience with.
Curious if you have done the VOIP thing before in a dispatch environment.
-Original Message-
From: Repeater-Builder@yahoogroups.com
We've got a backup plan in place already, not to worry. I already factored
that in.
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey
Sent: Monday, January 04, 2010 4:18 PM
To: Repeater-Builder@yahoogroups.com
Security is also a big issue with trying to use the internet for
something like this. Anyone with a little knowledge can hack into it and
do whatever.
Chuck Kelsey wrote:
You'll note that the manufacturer is not suggesting that you utilize
the Internet for this device. It is marketed for use on
Michael Cox wrote:
On Mon, Jan 4, 2010 at 10:29 AM, wd8chl wd8...@gmail.com wrote:
Michael Cox wrote:
Controller - I recommend a NHRC model that plugs into the Systems
board,
or, one of the Pion Simon models that plug into the card cage.
http://www.nhrc.net/ge-stuff.php
Sorry, that's what I meant. Is that what this controller will do?
Thanks,
Michael H. Cox
michaelh...@gmail.com
-Original Message-
From: wd8chl wd8...@gmail.com
Date: Mon, 04 Jan 2010 17:10:59
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Mastr II mods and parts
WOW-if anyone thinks that the Internet is a mission critical network, I
don't, it is certainly not a 5-9's reliable network. Secondly I would be
concerned about the PSAP liability-if they hand off a call and it does
not get delivered-if you were my client-which you are not, I would
advise strongly
The Internet is a shared medium. A private WAN/LAN commonly utilizes
fiber optic cable or licensed wireless networking to accomplish
connectivity. While private systems can deliver Internet, it is not
(necessarily) THE Internet. Privately owned facilities like what many
CATV, Phone,
Kevin is on the right track. At my day job, I am the CEO of a state research
data networking -- this stuff is actually what pays the bills to spend time
with repeaters on the weekends. I'm not sure if the credentials mean anything
here or not, but FWIW.
If this FD is in a relatively isolated
Yes, and they are called Intranets.
- Original Message -
From: Kevin Custer
To: Repeater-Builder@yahoogroups.com
Sent: Monday, January 04, 2010 5:55 PM
Subject: Re: [Repeater-Builder] dispatch centers run through the internet
The Internet is a shared medium. A
Given the inherit instability of the internet (it was NEVER designed to do what
we are doing with it), I would consider any communications system which is
reliant upon the internet to be flawed by design and completely untrustworthy.
My two cents worth.
From: Repeater-Builder@yahoogroups.com
Many cities utilize dark fiber provided by the cable companies (the Internet).
WEBEOC is WEB based, ala the Internet.
Here in Arlington County the County's fiber network is mostly provided by
Comcast Cable with some County owned fiber.
Some commercial fiber networks are self-healing and
It's done very day ,a good vpn and intranet and very difficult to interfere,
with short of a direct physical connection there is little better so I don't
understand all the fuss . Some one posted a good remote radio controller so the
rest is down to the skills of the system admin
B
( and
exactly what i thought.
People can say relyability, but your internet connection is probably a hell
of a lot more relyable than a typical verizon phone line.
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Barry
Sent:
again check out the hardware link I posted earlier. The IP-223 is designed
for commercial use and is very cutting edge as well as versatile. it is
backwards and forward compatible.
Then again I dont know anything, I only owned a communications company, and
while I truly dont know much about many
Recently I received an email asking me if I had any info on the
Astron model 1212 or 1212-18 switching regulated converters.
Well, none of the local usual suspects have anything and Astron
themselves is being unresponsive.
Does any of the list members have a schematic ?
Mike WA6ILQ
In the link to the unit he bought off ebay, in the photo the GE Mastr II was
the IDA equipped version.
Doesn't have a card rack to plug the PSE into. Of course you could wire it
in, but not as convenient as having the original style card rack where you
just plug it in.
Ralph W4XE
try again. I am a network engineer and I can tell you all it takes is one
mistake or routing loop extended power failure etc and your down for a while.
Anyone who would even think about doing this over the internet needs their head
checked. Ask yourself this question... If your power goes
I can tell you they are fantastic at generating noise on 80 meters.
On Mon, Jan 4, 2010 at 4:56 PM, Mike Morris WA6ILQ wa6...@gmail.com wrote:
Recently I received an email asking me if I had any info on the
Astron model 1212 or 1212-18 switching regulated converters.
Well, none of the local
VoIP is used daily and has been for over five years for mission-critical
applications such major electric and gas utilities and public safety. VoIP
isn't the problem, it's the transport medium.
Bill
--- On Mon, 1/4/10, Don E. Wisdom d...@engineeringinc.com wrote:
From: Don E. Wisdom
voip can be very relyable.
You just have to set it up right.
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Smith
Sent: Monday, January 04, 2010 7:21 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re:
Don,
You have pointed out some valid concerns but the world doesn't care...VOIP is
cost effective for day to day operations and everyone is going there as fast as
they can...the fact that everyone is going there will bring the reliability you
indicate is needed, before too long. Just remember
There is no system that is fool proof or infallible. I deal with RF links
that fail all the time in major cities across the country.
Lets consider how many dispatch centers are moving to remote dispatch or
even using IP based systems. I know that Woodbury county Iowa just upgraded
their system to
I used to be very reluctant to rely on VoIP technology, over the internet or
otherwise.
About 1-1/2 years ago, I was forced to install a VoIP link to one of our
remote tower sites in Missouri (I'm a radio engineer for the Missouri
Highway Patrol). The tower site was too far for a UHF remote
---BeginMessage---
Subject: Fw: Two Dollar Bill
Your chuckle for the day.
http://us.mc1106.mail.yahoo.com/mc/compose?to=ya...@verizon.net
Subject: FW: Two Dollar Bill
Subject: FW: Two Dollar Bill
THE $2.00 BILL I TRIED TO SPEND:
IF YOU'RE AS OLD
Jed;
What you ask is more of a legal issue than technical. There are
several products built to transport voice/radio over IP and at least 2
have been mentioned in this thread.. But.. before you start buying
equipment I think you need to deal with the legal and liability issues..
this has
I can't but ask the question - mission critical with out a UPS backup?
Yeah, ok, you bring up somegood points.
Don, KD9PT
- Original Message -
From: Don E. Wisdom
To: Repeater-Builder@yahoogroups.com
Sent: Monday, January 04, 2010 6:08 PM
Subject: Re: [Repeater-Builder]
Jed,
A couple of things: Is this going to impact the Fire Departments ISO (Public
Protection Classification Program) rating by dispatching from a residence?
Dispatch is 10% of the total ISO/PPCP score.
Does your proposed IP based solution meet the requirement of ISO for the
potential
A friend of mine has a VHF Prog Line Repeater to give away. It is
currently setup for 147 and 147.6 Mhz and was working when it was
removed from service. He doesn't want to just junk it but would like it
to go to someone who can and will use it. He has all the documentation
with it,
How does one control, from a distance ,a PSE controller? Using the tone set-up
? Jerry
--- On Mon, 1/4/10, Ralph Hogan rhog...@comcast.net wrote:
From: Ralph Hogan rhog...@comcast.net
Subject: RE: [Repeater-Builder] Mastr II mods and parts
To: Repeater-Builder@yahoogroups.com
Date: Monday,
Jed,
Whether or not it CAN be done is not an issue. The issue is whether it
SHOULD be done. The notion of a public safety agency operating an alerting
system that is based at someone's home, using privately-contracted phone
lines, is really frightening! What if the dispatcher is indisposed
time is of the essence
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Lemmon
Sent: Monday, January 04, 2010 8:35 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] dispatch centers run through the internet
Jed,
I keep wondering - isn't there a County dispatch center and why wouldn't
dispatch simply be handled from there? Most counties have a mutual aid
agreement in place for all the fire departments and typically a single
dispatch center is shared by them all. Seems the most logical and
Let get real...we're making up configurations and drawing conclusions that will
perhaps not even be considered. Without being part of the public safety team in
this fellas community all these what-ifs are senseless. Each community and its
emergency management will decide what works best for
Michael H. Cox wrote:
Sorry, that's what I meant. Is that what this controller will do?
Thanks,
Yes...I haven't been around one, but that's how it reads. Seems like a
decent choice, no idea how it performs though.
You can get a used Com-spec TP3200 for about the same price, and it's a
known
Ralph Hogan wrote:
In the link to the unit he bought off ebay, in the photo the GE Mastr II was
the IDA equipped version.
Doesn't have a card rack to plug the PSE into. Of course you could wire it
in, but not as convenient as having the original style card rack where you
just plug it in.
Don has it right. Using an inTERnet connection is not acceptable for
this application. Only a closed, private network (inTRAnet) is even
barely acceptable, and then there is still the problem of what is called
backhoe fade. Pretty self explanatory.
Jed Barton wrote:
voip can be very relyable.
gerald bishop wrote:
How does one control, from a distance ,a PSE controller? Using the tone
set-up ? Jerry
DTMF
WA3GIN wrote:
Let get real...we're making up configurations and drawing conclusions
that will perhaps not even be considered. Without being part of the
public safety team in this fellas community all these what-ifs are
senseless. Each community and its emergency management will decide
what
Ralph (and others)
So is the IDA equipped version the controller? If not, what does it mean
that I have the IDA equiped version? Does that mean I need, for example, a
different duplexer?
Thanks for your help everyone. I appreciate it.
On Mon, Jan 4, 2010 at 3:59 PM, Ralph Hogan
65 matches
Mail list logo
