444.050

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  100 ft high and is a

 Comet GP-9 Dual Band Antenna ( 11.9 db gain on UHF )

Here is the St. Paul DMR repeater at the new location.

Here is a picture of the GP-9 used on the DMR repeater.

444.050                     145.170                          DMR       

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.

443.050.

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.

443.575.

This repeater is in Minneapolis and is

the NØGOI/R. It has a PL tone of 114.8

 and an output of 60 watts.

.

146.745 & 443.675

Foreston.146.745 N0GOI/R with a tone  of 107.2.