To work well, you will need more than 'a few Hz' stability. Even 1/2 Hz
is very noticable and annoying.
Joe M.
Thomas Oliver wrote:
>
> You will need the three transmitters to have uhso (high stab oscilators) to
> keep them within a few hz of each other, you will have to delay the audio
> so all
I have two such systems near me - both on UHF. Come to think of it,
there is one on 800, too. All analog voice simulcast (800 one trunked,
but only two sites). It is definitely annoying to hear the heterodynes
of all the TXs. Only one of the UHF systems doesn't do that much. I
suspect it is the exc
And you are probably one of the only users left too.
T.J.JOHN MACKEY <[EMAIL PROTECTED]> wrote:
I think the name of the paging company is using this month is "Page USA", theyused to be called "MetroCall", before that they were "Telepage Northwest, aDivision of McCall Paging", before that they
I can handle emails as large as 45 meg, so if it's larger
than 8meg just let me know and I'll give you an email
address.
Mike WA6ILQ
At 08:16 PM 5/3/05, you wrote:
>edctexas wrote:
>
> >I'd be glad to do scan it into PDF format and send it to Kevin for
> >posting. I used to work with James Carr
>Read this article for some more insight, but remember
>that it was written by the president of Simulcast
>Solutions.
>
>http://www.simulcastsolutions.com/PDF/Simulcast.pdf
>
>Joe
>
Here is another article written by a ham that has a bit more practical
approach than others I have seen suggested:
Yes, you are right!! USA Mobility is the current name.
-- Original Message --
Received: Tue, 03 May 2005 09:11:34 PM CDT
From: "Paul Finch" <[EMAIL PROTECTED]>
To:
Subject: RE: [Repeater-Builder] voting receivers with simulcast transmitters
> John, good for you! Of course Metrocall is
Depending the size of the area, maybe you could get away with voting with
transmitter steering. The local police department does it here on 460.xxx
with 3 sites and it works good. 99% of the problems with the system are
related to the telco circuits coming back from the remote sites to the voter
edctexas wrote:
>I'd be glad to do scan it into PDF format and send it to Kevin for
>posting. I used to work with James Carrington many years ago. That
>was a very good publication.
>
>73 Ed K3SWJ
>(thecoxes(at)texas(dot)net
>
Thanks. If Ed or anyone else will scan it to PDF and send it to m
Tom and group,
There is several things you need for simulcasting. I will help if I can.
1-You need a super high stab oscillator, there is ways now to use one and
use GPS signals as the time base.
2-Frequency offsets. 2 cycles per transmitter, working out from the link, a
good simulcast engineer
Thanks Ken and all, appreciate it very much for the input. I basically need to just present a cor circuit to key the RVS-8, just using the already available voltage from the TM-V7 and push it up to key the circuit. I don't know why they made it to require so much, but it's their design, I just
You will need the three transmitters to have uhso (high stab oscilators) to
keep them within a few hz of each other, you will have to delay the audio
so all three transmitters transmit the audio at the same time. I do not
know what effect the multipath from buildings will have on the recieved
signa
Daron,
Simulcast is the same in analog paging and two-way analog public safety.
The only difference you will be using control links to feed the mobile
transmit back through the system to the simulcast system. From the link
output feeding all transmitters it's the same.
A good system will sound p
John, good for you! Of course Metrocall is now USA Mobility, I think!!!
Never know from month to month!
Paul
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of JOHN MACKEY
Sent: Tuesday, May 03, 2005 5:55 PM
To: Repeater-Builder@yahoogroups.com
I prefer a big,powerful,high central transmitter with sattelite
receivers. Our city and county uses this type of system and it works
very well over some tough terrain. I was never happy with any simulcast
system,they all have areas of cancellation and fuzzyness. I'd use
trunking before even con
The killer on these simulcast systems is in the
overlap areas. If the transmitters are only a few
miles apart, you could see some real problems, since
most everywhere is an overlap area. A rule of thumb is
that a simulcast system will never sound as good as a
non-simulcast system in the overlap are
--- Bob Dengler <[EMAIL PROTECTED]> wrote:
> But this begs another question: why does the RVS-8
> require such a high COS
> voltage? I don't think I own a radio that supplies
> that much voltage on
> COS, nor have a ever used a controller that required
> 8 volts of COS voltage.
>
> Bob NO6B
As long as all the transmitters are ran in synchronisity you should
not encounter very much multipath or speed of light error as the
transmitters are so close to each other. But your performance may
improve with spacing. In the world of FM who ever is 15dB greater wins
due to the capture effect of
well to do that correct I believe you will need a master oscillator per
site and GPS compensation for path distance changes.
that is for the transmitters.
- Original Message -
From: "Daron Wilson" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, May 03, 2005 7:46 PM
Subject: RE: [Repeater-Builder]
I guess I wasn't clear enough. I'm familiar with the simulcast paging, this
is not paging. This is public safety police analog repeaters. The proposal
is to put three in a row down the town, about 3-4 miles apart, voting
receivers at the two south ones linked back to the 'main' site via UHF
co
At 5/3/2005 04:36 PM, you wrote:
>At 06:09 PM 5/3/2005 -0500, you wrote:
>
> >I'm not sure what it is he's trying to "run" here, but that implies power.
>
><---He's talking about translating the COS output of a V7a (which is an
>active high of +5 volts) to +8 volts, needed by the voter. The simples
At 06:41 PM 5/3/2005 -0500, you wrote:
>An opto certainly would get you there, then.
>Digikey has some nice ones from Panasonic and NEC with CTR's above
>10-0%, so you could doinverting or non-inverting conversion with only
>the opto and a pair of resistors.
<---Certainly the better engineered
--- w9mwq <[EMAIL PROTECTED]> wrote:
> Wonder if anyone has a simple diagram to build a
> small circuit from 5
> volts to about 8 volts. Was told I could use an
> opto isolator, but am
> not familiar with them. I'm getting ready to
> interface the Kenwood TM-
> V7 radios to the RVS-8 voter, am
At 06:36 PM 5/3/2005, Ken Arck wrote:
>At 06:09 PM 5/3/2005 -0500, you wrote:
>
> >I'm not sure what it is he's trying to "run" here, but that implies power.
>
><---He's talking about translating the COS output of a V7a (which is an
>active high of +5 volts) to +8 volts, needed by the voter. The si
At 06:09 PM 5/3/2005 -0500, you wrote:
>I'm not sure what it is he's trying to "run" here, but that implies power.
<---He's talking about translating the COS output of a V7a (which is an
active high of +5 volts) to +8 volts, needed by the voter. The simplest way
to do it would be with 2 NPN trans
>
>What he really is talking about is level translation.
"I'm getting ready to interface the Kenwood TM-V7 radios to the RVS-8
voter, am told it needs at least 8 volts to run
it."
I'm not sure what it is he's trying to "run" here, but that implies power.
Yahoo! Groups Links
<*> To visi
>
>About once a year they call me & tell me that they "have a great new paging
>service to transfer me to which will be exactly like what I have now only
>better". I tell them "GREAT, as long as it operates on 150 MHz and provides
>voice paging service I'll be happy to change". Then they tell me
At 04:42 PM 5/3/2005 -0500, you wrote:
>At 04:32 PM 5/3/2005, w9mwq wrote:
>
>The optoisolator would be a component that you would use to convert
>logic levels from say 8V or 12V or 3V to 5V or some other voltage,
>but you aren't going to move any power through one.
<---sounds to me like what he
I think the name of the paging company is using this month is "Page USA", they
used to be called "MetroCall", before that they were "Telepage Northwest, a
Division of McCall Paging", before that they were "MCI Airsignal".
For about 5 years they have been telling me that they will be dis-continuing
Will do, stopped until I hear back I did save the old board. So I will
look later this evening.. meanwhile back to the antenna project.
mike
mike
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of skipp025
Sent: Tuesday, May 03, 2005 6:2
Astron RS-35 vs the VS35m
There are slight differences between the two
boards... if it's already working for you...
you probably got away with it. If not you might
hold up until I look at my notes. Yes, one leg
of a resistor gets lifted to the control pot,
but check the actual values of the
At 04:32 PM 5/3/2005, w9mwq wrote:
>Wonder if anyone has a simple diagram to build a small circuit from 5
>volts to about 8 volts. Was told I could use an opto isolator, but am
>not familiar with them. I'm getting ready to interface the Kenwood TM-
>V7 radios to the RVS-8 voter, am told it needs
Wonder if anyone has a simple diagram to build a small circuit from 5
volts to about 8 volts. Was told I could use an opto isolator, but am
not familiar with them. I'm getting ready to interface the Kenwood TM-
V7 radios to the RVS-8 voter, am told it needs at least 8 volts to run
it. The TM-
John,
What carrier is still letting you get away with analog pager??? All of the
big guys have gone satellite links which don't pass analog audio, I don't
like anything but terrestrial links, guess I am to worried about that
service call to the satellite!!! The satellite link has it's place but
I know that here in Portland 158.700 MHz is STILL occasionally used for
Simulcast analog/digital paging. I know the analog part is still working
every time my pager goes beep.
I think I am just about the last person in town with a two-tone voice
pager still receiving commercial service. I've ha
I noticed the statement about the "low level (open collector) with 10mA sink
current." It's never easy, is it?
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of skipp025
Sent: Tuesday, May 03, 2005 10:30 AM
To: Repeater-Builder@yahoogroups.
where are you from? And do they have the channel
elements?
~Ben, KB9LFZ
--- nvradtec <[EMAIL PROTECTED]> wrote:
> I have Aquired 13 low powered (34 and 44) Mitreks
> that were removed
> from service at end of last year, most are complete
> (head, mic, cable,
> and radio)I beleive they are curre
Working from memory, I belive you're on the right
track. Also keep in mind the COS output on the
TKR-720/820 repeater is not a complete or true
logic transistion.
In short, the voltage on the COS pin doesn't go
from zero to +12 volts or the converse. The level
was something wacky value.
Daron,
One other thing, if they are pine trees you would have a lot of problems at
900 MHz, not much at 150-170 MHz, at least we did not in Houston, Texas
around the pine trees at 152 MHz. I am for Simulcast systems for this
application if they are engineered and constructed properly.
By the way
The booklet is made from 14 sheets of 11"x17",
folded and stapled down the center. Its in very good shape, and nicely
printed.
Mike, Thank you for helping
to make this information available to everyone. I will
contact you off the list to make arrangements.
Duane Hall
AB8QU
www.hallel
Hi Duane,
This group is truly amazing, I would like the two pages describing the
building of the sweep modulator. I can get the rest later when it is
scanned. I understand it makes good reading.
Thanks Ted [EMAIL PROTECTED]
- Original Message -
From: "ka8gvh" <[EMAIL PROTECTED]>
To:
Daron,
I will tell you what I know about analog simulcast systems. There is
basically two manufactures of this equipment, Motorola and
Quintron/Glenayre. If you want it to be a fairly good sounding system stay
away from Motorola equipment. I worked in paging back when there was still
a lot of a
I'd be glad to do scan it into PDF format and send it to Kevin for
posting. I used to work with James Carrington many years ago. That
was a very good publication.
73 Ed K3SWJ
(thecoxes(at)texas(dot)net
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.y
Is the
publication bound? If so I would have the break the pages apart... like
carefully cut the spine off. I can then re-bind it with a velo-bind
machine.
I can
run it through my PDF machine... 54 pages will take approx 2
minutes... Let me know what you would like to do..
mike
--
Ken,
Your email program is going wacky
I'd hope it isn't being a responder...
Kevin
Buley, Kenneth L (GE Consumer & Industrial) wrote:
ONCE MORE INTO THE BREACH !!
IF YOU'RE READING THIS, YOU PROBABLY DON'T HAVE MUCH TO DO, COMPARED TO THOSE WHO ARE SO BUSY TH
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of Neil McKie
Sent: Tuesday, May 03, 2005 8:48 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] voting receivers with simulcast
transmitters
Daron,
At last report 152
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of Neil McKie
Sent: Tuesday, May 03, 2005 8:35 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] voting receivers with simulcast
transmitters
I would consider one site in
Daron,
At last report 152.24 MHz is still used by Arch paging but is
digital. You might contact Arch and ask if any analog paging is
still used in your area.
If you have trouble contacting them, please let me know.
Neil - WA6KLA
JOHN MACKEY wrote:
>
> Daron-
>
> Most all you
I would consider one site in favor of a circularly polarized
antenna system. Where that site should be placed is another issue.
If you are thinking of your employeers located city, I know that
one a tiny bit.
Neil - WA6KLA
Daron Wilson wrote:
>
> Hello Folks,
>
> I'm looking over
i volunteer mike wa6ilq
mdmka8gvh <[EMAIL PROTECTED]> wrote:
I found it, buried, deep in my Lynchburg Library. Scanning all 54 pages will be a chore. I have the two pages of appendix A "How to Build a Simple Sweep Modulator" ready to email to those that want it. The first three chapters would be
This is somewhat off topic, but there are a number of
land mobile professionals here that may find this
interesting.
From another list:
>For those interested in understanding the 800 MHz Transition program the
>Official Reconfiguration Manager has issued a new Guide and Handbook that
>may be
Daron-
Most all your 150 MHz or 900 MHz paging systems are going to be simulcast.
If there are any 150 MHz analog paging systems around, try listening to them.
-- Original Message --
Received: Tue, 03 May 2005 01:26:06 AM CDT
From: "Daron Wilson" <[EMAIL PROTECTED]>
To:
Subject: [Repeate
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