MAGIC REPEATER EQUIPMENT INFO.
145.170 & 444.050 St Paul.DMR 442.050 Color Code 11 Repeater St Paul.
146.745 & 443.675 Foreston.
HOW A REPEATER WORKS.
RECEIVERS FOR THE 145.170.
145.170 & 444.050 St Paul.
The main site for the magic repeater system is
located about 1 mile north of the MN capital
The 145.170 -offset 100.0 Pl tone transmits 100 watts
Elevation at the main site is 980 ft.
The tower stands 64 ft. and the antenna base is 70 ft.
Here is a picture of the meters that Terry N0GOI
has installed on the 145.170 repeater.
These are used to monitor the signal strength of
each remote receiver.
Hugo, Falcon Heights and ST. Paul are hooked up for now.
Here is a picture of the MSF 5000 we are using for the 145,170/R
NØGOI Repeater St. Paul.
Here are the Waycom Duplexers.
St Paul tower pictures.
This Motorola MSF 5000 was put on the air
3/14/2014. It replaced the Motorola 1225
which had been used for the 444.050.
The MSF 5000 has a power
output of 60 watts going
to the antenna. ( after the duplexers ).
DMR Repeater is on 442.025 color code 11 code plug name STP.
The MAGIC DMR Repeater on the air
We are using the Motorola SLR5700 DMR UHF Repeater,
with a set of UHF Wacom BpBr Duplexers,
1/2" hardline with N-type connecters.
The antenna is about 65ft high and is a
Comet GP-9 Dual Band Antenna ( 11.9 db gain on UHF )
Here is a picture of the GP-9 used on the DMR repeater.
HOW A REPEATER WORKS
While listening to the repeater I often hear the first time amateur asking questions like, how come I can hear the 145.170 mach. on 443.05 or what do you mean I'm going through the St. Paul Park site? If your one of the newbie's to the magic repeater system or any VHF or UHF system your not alone. With all the new no-code techs entering the VHF an UHF bands I hear these questions every day. What ever your current license maybe or maybe your even a avid scanner listener, let me see if I can fill in some of these blanks for you. For an example if your in the Woodbury MN. area and using the 145.170 MHz machine with a negative offset and a Pl tone of 100.0 your listening to the out put of the transmitter which is located in St. Paul, MN. When you transmit with the negative offset your transmitting on 144.570 MHz and may very well be getting into several receive sites. WHAT IS A RECEIVE SITE? A receive site and we have a few, is just what it sounds like. In short its another repeater that receives your signal as you transmit and then retransmits the signal. In the case of the magic system and the example above your signal is received and retransmitted on what we call a UHF LINK to the main transmitter in St. Paul. At the St. Paul main site there is of course a UHF receiver that grabs the signal and retransmits the signal out on 145.170 MHz. Now that is a simple explanation of what is going on when you transmit. There are a few other thing to keep in mind that are going on behind the scenes. #1 the main site may also be transmitting your signal on another band such as UHF and our 443.050 machine. #2 You might be into several sites at the same time. That's where the voter comes into play. It receives your signal from the different sites and determines which sight your getting into best by comparing each signal from each sight and the noise levels coming from each of the sites. The voter then says "hay I'm getting a better signal from the Woodbury site than I am from the St. Paul sight so lets use the Woodbury signal" and then passes that signal through the system.
The 443.050 N0SBU/R 118.8 PL located
in Hugo,Mn. went on the air on March 15 2014.
It is running 40 watts at the antenna.
Here are some pictures of the repeater.
I received a Motorola S-1350 wattmeter
and here it is on the 443.050.
Thanks to Terry N0GOi we were able to
install a Motorola MSF 5000 repeater
for the 443.050 N0SBU/R in Hugo.
Here is a picture of the repeater.
Here ia a picture of Power amp deck and the
Radio metering panel.
Here is a picture of the transmitter and receiver deck.
Here is the MSF 5000 installed into the rack cabinet.
Here is the 145.170 receiver.
On July 26,2014 the tower crew put
up the 40' Rohn tower at NØSBU's QTH.
The mast you see on the roof is
where the antennas were before they went onto the tower.
At the top is a Diamond dual band used for the 443.050
and the 145.170 receiver.
The 440 beam below is to link the output of the receiver
back to the 145.170.
On the side mount is a TRAM 1480 dual band for my
station in the house.
This repeater is in Minneapolis and is
the KDØWIL/R. It has a PL tone of 114.8
and an output of 45 watts.
146.745 & 443.675
Foreston.146.745 N0GOI/R with a tone of 107.2.
WELCOME TO THE KØGOI FORESTON MAGIC REPEATERS .
"MINNESOTA AMATEUR GROUP OF INDEPENDENT COMMUNICATORS"
Home page. Hi my name is Terry and my call is NØGOI
I would like to thank you for stopping by the
FORESTON,Magic Repeater Home Page.
Her is a link to the Magic Repeater Home Page.
that N0SBU George has put up for us.
One last thing if there is some thing you would like to see
here please do let us know and we will be more then happy to try and work it in.
Here are pictures of the new Motorola MSF equipment I just put in line at Foreston.
. Foreston 2 meter 146.745 / 146.145 Pl 107.2 NØGOI/R MSF 5000.
Foreston UHF 443.675 / 448.675 Pl 114.8 NØGOI/R MSF 5000 Digital.
Foreston tower project.
Give me a call on the repeater.
Thanks and 73 from
Terry , NØGOI
4 Falcon Heights Site Snelling Ave. @ Larpenteur Ave.
Went online 9/8/2013.
5-Maplewood East Site. LOCATION, just West of Hwy.120.
Here is a picture of the 40' HDBX tower with an Explorer 14 HF beam.
On top of that is a 2 mtr/440 omni for the 145.170 reciever at this sight.
Upper Left morse code cw-ider.
Top center is the COR ( Motorola Rick Interface )
Lower Left Motorola Radius GM300 VHF Repeater imput
Lower Right Motorola Radius GM300 UHF Repeater link.
The Woodbury Tower Crew.
KA0NAN,MARTY,KA0ZJG,BUD,AND N0SBU GEORGE
AT KF0ZM,JOHN'S QTH.
6-Hugo Site Went online 9/2/2013
The unit is a Motorola GR400.
The upper left is the Repeater Interface which is a HIM 3333B controller.
The lower left is the 144.570 receiver which is a Motorola Max Trac.
The lower right is the 440 link transmitter which is a Motorola Radius.
LOCATION At Hwy. 61 and 141 St. No.
Here are two pictures of Terry N0GOI working
on the link antenna for Hugo at the main site.