This sounds perfect for a backup control system.
However, using mobile phone/gsm to control primary systems
has the following problems.
1) Latency - texts can sometimes be late.I have known a delay of 24 hours
during Christmas and new year peaks.
2) Spam texts - the phones inbox fill with offers
Repeater BuilderWhat is the standard spacing for a VHF antenna side mounted on
rohn 25 tower? I found a page on repeater builder that showed 1/4-1/2
wavelength with a null behind the tower. I don't want to mount it any further
than 4' from the tower but of course I would like to minimize the i
In the days before the cushman ce50tg, I used an FM10CS with a bearcat
scanner to set pass and reject on BpBr duplexers. Be sure and use a 50 Ohm
10 db attenuator on each port to normalize mismatch between the duplexer
port and the antenna port on the bearcat, or the generator and the duplexer.
Al
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> [EMAIL PROTECTED] On Behalf Of skipp025
> Sent: Friday, March 02, 2007 7:51 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: repeater problems, duplexer etc.
>
>
> > There is no
> There is no way you can tune a duplexer with a power meter
> or swr meter. They are not sensitive enough to see the low
> level signals even if your signal source is a good size
> transmitter.
Sure you can... just depends on the duplexer, test equipment and
what realistic type of results yo
If you are tuning a pass/notch type duplexer you must always tune the pass
part first then tune the notch last. Never touch the pass part of the tuning
again after you have finished with the notch. You may need to go back and
forth sometimes but the notch should always be the last thing that you
to
Hello,
Has anyone decoded the PROM used in the Paging Synthesizer for the
Motorola PURC station?
The PROM part is TRN5814A and it is used to select the frequency that the
PLL will lock to.
Alternativaly, does anyone have the capability to program a PROM for this
station?
Thanks
Hi
This months edition of Everyday Practical Electronics magazine features part
one of a project to build a device to enable remote control and remote
status indication all via an old Nokia mobile phone suing GSM based SMS
service ( text message )
See the magazine web site here:
http://www.ep
Thanks for the info James!
I'm also serious about pursuing one of these systems as well. I
wonder if we can get a discount going here for multiple units. I'm
anxiously awaiting Glens (W8AK) hands on findings.
Paul
K6EH
-
On Mar 2, 2007,
I'll be anxiously awaiting your findings Glenn. I know Motorola is
selling and shipping "Test Kits" to dealers at this time. I also
learned that orders are being placed for the units, but it is more a
waiting line at this point in time. I was led to believe that only
the "Test Kits" are bei
Ok guys ... here is what I found.
It is not Motorola proprietary format, but rather it is ETSI (European
Technical Standards Institute) (standard number ETSI TS102 361-1). It is a
DQPSK scheme. This is a published standard, and I just might start pursuing
its use rather than D-star at this poin
I was surprised also. Usually they just send back an
automated, generic reply and offer no explanation for
problems that just vanish. The write-up in the blog
did a pretty good job explaining things. Too bad the
posted messages during that time frame will never be
mailed out. I'm too lazy and fed u
There is no way you can tune a duplexer with a power meter or swr meter.
They are not sensitive enough to see the low level signals even if your
signal source is a good size transmitter.
You can use a receiver tuned to the frequency you are trying to notch out.
Your signal source then should be a
At 08:28 AM 3/2/2007, you wrote:
>Thank you for writing to Yahoo! Groups.
<---It only took 3 days to receive the reply, right? :-)
Ken
--
President and CTO - Arcom Communications
Makers of the world famous RC210 Repeater
At 2/28/2007 08:19 AM, you wrote:
>Bob
> You seem to want to lump what is characteristically a complex impedance
> (R+or-jX) into a single number in order to simplify your argument that a
> non conducting RF output transistor is an open circuit because the
> transistor is not having any RF dri
Bob M. wrote:
> Thank you for writing to Yahoo! Groups.
>
> I have read your email and understand that you are
> unable to received group messages since Feb. 28. I
> appreciate you contacting us and I'll be glad to
> assist you on this matter.
>
> As you've noticed, we were experiencing som
NO. You will create more problems.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> [EMAIL PROTECTED] On Behalf Of Tony L.
> Sent: Friday, March 02, 2007 11:11 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Diver
Anyone have any ideas? Are our crude methods of tuning the duplexer
too crude?
I would say yes. I've done UHF cans with my service monitor for the signal
generator (very adjustable) and an HT to receive it on, and been moderately
successful. However, your individual mileage may very, if you
At 03:38 AM 3/2/2007, you wrote:
>Picked up a vertex VXR 7000, and a Celwave 6 cavity duplexer. (VHF)
<---What type? One of those mobile notch-only type? How about a model number?
>Using Celwave pd-220 3a, with 25 feet lmr.
<---Some folks recommend against using LMR in a full duplex system
(t
Thank you for writing to Yahoo! Groups.
I have read your email and understand that you are
unable to received group messages since Feb. 28. I
appreciate you contacting us and I'll be glad to
assist you on this matter.
As you've noticed, we were experiencing some issues
with emails not bei
Picked up a vertex VXR 7000, and a Celwave 6 cavity duplexer. (VHF)
Using Celwave pd-220 3a, with 25 feet lmr.
We have spent hours tuning the duplexer, and find that it makes the
system deaf. 1 watt out gives 10 miles coverage simplex, and when
using dual antennas with the 3+ mhz bandspread the
> As far as I can tell, it's a proprietary Motorola format designed for
> business and industrial use.
What I've learned is that it is not Moto proprietary, Vertex and Kenwood
are involved also.
Should be interrested, radios should be dual-mode too, so they support
analog FM also.
..
Erik OH2LAK
One of our repeaters is at a water tank. Our antenna is mounted at
the top, but on the tank's northern side. There's an opportunity to
mount another antenna at the oppostite side of the 50' wide tank
(same height). I was wondering if we might improve omni coverage by
having radiators operati
George Henry wrote:
> I think Yahoo has been having hiccups the last couple of days... I
> see quite a few messages on the Yahoogroups site that I never got in
> my email, and other messages have been arriving out of order (replies
> before the originals...)
>
> Very weird.
>
>
> George
>
Rig
Not sure about using it on the ham bands but we did just receive our demo. I
have it all programmed and will be installing the repeater later today.
Anxious to see how it plays. I try to post some results.
Glenn W8AK
** AOL now offers free
email to everyone
hello guys.,
pls am new to this group, pls has anybody in the group linked 2 motorola
gr500 repeater to together so that it can wide range asuming both repeaters are
5okm apartor there about . using the basic controller to archive this.?.
pls all infor on the programming will be apprecia
Paul,
Been happening a lot with Yahoo for some reason, sometimes I get peoples
responses hours before I get the original answer.
Paul Too
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Paul Metzger
Sent: Friday, March 02, 2007 12:26 AM
Hello,
Got this from another Yahoo group, looks like they are trying to improve
things but as most Humans do, they messed up! This is probably not the
problem Paul was referring to, just interesting information.
Paul
>From February 28 about 2:30 p.m. (Pacific time) until March 1 about
11:15
I think Yahoo has been having hiccups the last couple of days... I see quite a
few messages on the Yahoogroups site that I never got in my email, and other
messages have been arriving out of order (replies before the originals...)
Very weird.
George
-Original Message-
>From: Paul M
Tony,
Not sure where you are going with this. I have seen and heard of antenna
systems that used power dividers to connect two antennas to a single point
with equal or unequal power division. Usually used in buildings where the
RF resource is on the top of the building and coverage is needed
Ken Arck wrote:
> At 07:23 PM 3/1/2007, you wrote:
>> Were about to implement it on a site in Portland and from preliminary
>> testes it looks good.
>
> <---Has a lot of balls, eh?
>
> Ken
Oh, dear...
--
Jim Barbour
WD8CHL
James wrote:
> Ok, one more thought here. Does anyone know if MOTOTRBO uses the
> IS-54/IS-136
> standard for TDMA? If so, I have found publicly available information on
> this
> standard which means that it could be put to use in the amateur bands.
>
> James
>
As far as I can tell, it's a
Paul Metzger wrote:
> When I send e-mails to the group, it takes hours for my posting to
> actually post to the group?
>
> Paul Metzger
> K6EH
Two things relate to delay of posts:
1, EVERY new member is moderated for a period of time until the
moderators see that you have decent posting habits
Most likely just yahoo and your isp - a friend here in
Temple on road runner takes hours for a post to go through,
while a different isp goes through in minutes. 73, Steve
NU5D
When I send e-mails to the group, it takes hours for my posting to
actually post to the group?
Paul Metzger
K6EH
Where did you find such information James? I look forward to reading
it. Tomorrow I'll push to research the legality of it myself as well.
Paul Metzger
K6EH
Digital Voice Amateur Radio Association
http://www.hamradio-dv.org
N6DVA
-
On Mar 1
I had almost purchased a MOTOTRBO repeater for the N6DVA Digital
Voice Amateur Radio Association (to be used here within the greater
Los Angeles area). But due to it utilizing a TDMA protocol, I felt it
might not be a legal protocol to use for Amateur Radio purposes.
Paul Metzger
K6EH
Digi
You might try the relmradioshop Yahoo group... If the Relm is anything like
the Bendix-King radios (which Relm purchased), you can only do a limited amount
from the front panel. You really need the programming software to do
everything. Fortunately, for the BK radios anyway, the software is r
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