On Dec 27, 2007, at 11:46 AM, Repeater-Builder@yahoogroups.com wrote:
Hello,
This email message is a notification to let you know that
a file has been uploaded to the Files area of the Repeater-Builder
group.
File: /Simple P25 Repeater /
In a message dated 12/28/2007 4:24:38 A.M. Eastern Standard Time,
[EMAIL PROTECTED] writes:
The disadvantages are many, but the main one is in that the digital
signal is converted to analog and then back to digital, and the
resulting double-vocoded audio which has been put through two
I have 2 Maxtracs Setup that I use for P25 Didgital . Works Well to me .
Now it does not ack like a Motorola Quentar or Other P25 Digital Repeaters ,
But
It Works . It just allows you to pass the P25 Digital Pakets from the Radio
you are using , and the Other Users Radios Decode it .This
I have 2 Maxtracs Setup that I use for P25 Didgital . Works Well to me .
Now it does not ack like a Motorola Quentar or Other P25 Digital Repeaters ,
But
It Works . It just allows you to pass the P25 Digital Pakets from the Radio
you are using , and the Other Users Radios Decode it .This
On Dec 28, 2007, at 3:01 AM, [EMAIL PROTECTED] wrote:
In a message dated 12/28/2007 4:24:38 A.M. Eastern Standard Time, [EMAIL
PROTECTED]
writes:
The disadvantages are many, but the main one is in that the digital
signal is converted to analog and then back to digital, and the
resulting
This is only a Quick setup. I would prefer a real P25 Digital Repeater , But
this Setup Works . You can go to Ebay and Get Motorola Astro Sabers or a
XTS-3000 And Others . But you haft to get one that is IMBE P25 . VSLEP Is not
Allowd on Ham Bands . IMBE Is Allowd for Ham Use . And it sounds
p.s. Yes, I'm fishing a bit with this message.
I stood around and looked stupid while a local good digital engineer
(and RF guy) and another good RF engineer discussed this idea once,
and they both expressed interest but no time to work on it right now.
Anyone who knows how to go about this
Anyone know the device number of the gaasfet (or whatever type it is)
in the P-145 model?
Inherited one with -12 db gain. Looks easy enough to fix.
Thanks,
Dwayne Kincaid
WD8OYG
Hi Guys,
Thanks for the replies on this, my curiousity about the pre amp is
based on my limited knowledge that you can't improve what you can't
already hear so I wasn't too sure how much benefit they actually give.
We are lucky in as much as our site has no other users and the nearest
UHF site is
I'm assuming you mean preselector - preamp.
At that frequency, they were usually made with a bipolar transistor,
unless it was custom made; then it could be a GaAs device. It is a
MRF-901 (or equivalent) if it is bipolar. Many times only 901
appeared on the device, if it wasn't ever changed.
At 03:49 AM 12/28/07, you wrote:
Anyone know the device number of the gaasfet (or whatever type it is)
in the P-145 model?
Inherited one with -12 db gain. Looks easy enough to fix.
Thanks,
Dwayne Kincaid
WD8OYG
I fixed one years ago with a Siliconix U-310, but I have no doubt that there
are
I have a GLB Model P-147.49 that was custom made for me years ago. It
use an MRF901 device.
73, Joe, K1ike
ldgelectronics wrote:
Anyone know the device number of the gaasfet (or whatever type it is)
in the P-145 model?
Inherited one with -12 db gain. Looks easy enough to fix.
Thanks,
Repeater-Builder Guru's,
I am trying to tune up the transmitter on one of my Mitrek's and am
having no luck and alot of frusteration.
I have the motorola manual and the cheat sheets here:
http://www.repeater-builder.com/mitrek/pix/mitrek-tx-tuning.gif
The question is, what do I need to measure
Anyone know where I can obtain the
manual for GE LBI #4100 ?
It is not found in: The 'Mastr'
Index of GE LBI's
I have known Wes for about 15 yrs. He's a good dude!!
Mike Perryman
[EMAIL PROTECTED]
7839 Ashton Avenue
Manassas, Virginia
20109-2883
Download Outlook
Contact Info
703.392.9090 General Office
703.392.9559 Facsimile
Almost all Motorola radios use a 50 micro-amp DC
meter. Sometimes the negative end goes to ground,
sometimes the positive end. The metering test set will
have a meter reversal switch on it to flip the leads.
You can use almost any 50uA meter. Most of the time
you're just peaking various stages,
Just ordered the Service Manual per Eric's information (thank you
Eric) and the part number works mucho fine. The price today is
$14.40 per copy plus any tax and ground shipping.
cheers,
skipp
Eric Lemmon [EMAIL PROTECTED] wrote:
Mark,
You should order a copy of the R1225 service
At 05:10 PM 12/27/07, you wrote:
Repeater-Builder Guru's,
I am trying to tune up the transmitter on one of my Mitrek's and am
having no luck and alot of frusteration.
And I guarantee you will ruin the PA deck (all it takes is one click)
unless you read the caution in my interfacing article about
Thanks,
This one had different marking, but could have been changed. I'll put
a 901 in it and see how it does.
Dwayne
--- In Repeater-Builder@yahoogroups.com, Joe [EMAIL PROTECTED] wrote:
I have a GLB Model P-147.49 that was custom made for me years
ago. It
use an MRF901 device.
Hi All,
Hope you had a good Christmas, and looking forward to the New Year.
Anyway my question.
I have a RLC-MOT installed in my Mitrek 10mtr RX, and have also fitted a
optocouple to isolate the radio from the controller (RLC-2A)
I have used the circuit from the Mitrek pages in
While answering KE7IODs question on tuning a radio I realized that
having a scan of the old Build Yourself A Moto Test Set article
would be, to use a Martha Stewart term, A Good Thing.
So is there anybody out here that has a FMM collection and a scanner?
Or the critical issue and a xerox machine?
I still don't understand why people object to two repeaters - properly designed
- cannot share the same channel? With separate PL tones and limited hand time,
they can complement each other.
The use of a coordinator that assigns a channel based on antiquated
criteria is still providing
Doug,
Two repeaters operating on the same frequency pair but with different PL
tones is essentially a community repeater that will have the same
disadvantages. A community repeater is fine for infrequent users in the
agricultural, delivery, and towing services, for example. The chances for
On Dec 28, 2007, at 11:19 AM, Doug Dickinson wrote:
I still don't understand why people object to two repeaters -
properly designed - cannot share the same channel? With separate PL
tones and limited hand time, they can complement each other.
No one here objects to this -- it happens all
I'm all for that.
We're using less than 10 of a 200 gig RAID array on the server.
If anybody has copies of FMM or of rpt I'll be happy to get them
scanned and on the server.
Mike WA6ILQ
At 09:48 AM 12/28/07, you wrote:
What would also be interesting to have as scanned files on a CD or
Thanks Skipp and Eric...
I broke down today and ordered the manual myself. Again, thanks!
Mark - N9WYS
-Original Message-
From: Repeater-Builder@yahoogroups.com On Behalf Of skipp025
Just ordered the Service Manual per Eric's information (thank you
Eric) and the part number works
---your not talking about two repeaters in differant towns with the
same frequency and differant pl's? I believe your talking about about
2-repeaters in the same town?
Cause I do know that frequency coordinators do set the same
frequencies on repeaters within a 200 mile radius, which does cause
Hi Mike,
Have an FM Repeater collection(think it is complete). Back in the 60's,
but do not have a way to scan them. Enjoyed them very much. Wonder what
happened to Ken Sessions Michael J.Van Den Branden.
Sad to see it disapear.
Wesley AB8KD
we have had repeaters on the air in the past and Motorola has put a repeater in
town with the same Freg. time and time again. It is a common thing just
happen last year to a repeater we have in TN. new repeater 20 miles away same
Freg.
don't get mad over it, just the way it is.
John
If your goal in building a repeater is the experience and education it
brings, and the chance to see how users react to your particular philosophy,
could you live with having it on the air every other day to get a
coordination 10 years sooner? I think that would work for most hams.
If you share
Our club operates two repeaters on the same channel
using two different tones, and all works fine. In our
case, we wanted to have instant backup in case one
repeater went down (one is solar powered) and all the
user had to do was switch tone frequencies and use the
other repeater.
They are not
Here is a few photos of what mine looks like. The circuit board is
labeled on the top P40-500.
73, Joe, K1ike
ldgelectronics wrote:
Thanks,
This one had different marking, but could have been changed. I'll put
a 901 in it and see how it does.
Dwayne
.
Anyone know where I can find the model number decoding matrix for the
TX RX product lines? I have been through there web site and they dont
seem to offer much info on this subject? If you have any idea where I
can find this info please email me at my address on qrz.com as I do
not get emails from
living and working at ground zero so to speak has advantages and
disadvantages. we dont have to deal with pagers and alot of other
interference that alot of you deal with. on the other hand cell phone
service in this county is poor at best. most all repeater owners as
well as local hams
Re: Musty Book Magazine collection
I love old Ham Radio Books and Magazines more than most
people but those old magazines cover some pretty musty
technology and equipment.
The sad part about the FM-Repeater subject is how little
new information is available in book form.
If you're going
I have a meter that I removed from a Mitrek based paging transmitter that I
used to tune Mitrek mobiles when I built repeaters out of them. It has the
plugs on the ends of the wires for the receiver and transmitter as well as the
function and meter reverse switch on it would sell it if anyone
I Am not sure which diagram you are looking at but when I connect a opto to
A transistor, the base of the output transistor (I.e. 2n)connects to the
Emitter or collector (depending how you wish the output transistor to work )
Of the opto transistor.Over here I set them up all the time to
At 02:00 PM 12/28/07, you wrote:
Hi Mike,
Have an FM Repeater collection(think it is complete). Back in the 60's,
but do not have a way to scan them. Enjoyed them very much. Wonder what
happened to Ken Sessions Michael J.Van Den Branden.
Sad to see it disapear.
Wesley AB8KD
Mike Van Den
At 06:55 PM 12/28/07, you wrote:
Anyone know where I can find the model number decoding matrix for the
TX RX product lines? I have been through there web site and they dont
seem to offer much info on this subject? If you have any idea where I
can find this info please email me at my address on
The accual meter circuit IS one volt full scale at 50uA.
The Motorola test sets all used a 19K (give or take)
resistor in series with the 50uA meter. That = 20K resistance.
Measurements are refered to the 0 to 50 scale.
Richard Bessey [EMAIL PROTECTED] wrote:
The question is, what do I need
--- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ
[EMAIL PROTECTED] wrote:
At 02:00 PM 12/28/07, you wrote:
Hi Mike,
Have an FM Repeater collection(think it is complete). Back in the
60's,
but do not have a way to scan them. Enjoyed them very much. Wonder what
happened to Ken
Thankyou Eric for this information.
Would anyone know where I can find
the LBI-4100 ???
I have already searched
The 'Mastr' Index of GE LBI's,
The 4100 is not listed.
.
.
.
In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED] wrote:
Randy,
There's nothing to convert; the
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