The N8OUZ/R DMR-MARC MotoTrbo repeater is on the air on 442.2875+ (input 447.2875).
Currently on a temporary transmitter antenna and site, and with limited receive coverage, and limited transmit power.
But, it works, and you can test it.
Program your radios:
Time Slot #1 – Group Call 1 = World Wide
Time Slot #1 – Group Call 3 = U.S. / English Speaking Countries
Time Slot #2 – Group Call 2 = Chicagoland Repeaters Only
The current transmit antenna is a J-pole at 40ft…. but…
|Current Receive antenna, plugged
into the back of the repeater
in my basement..
The current receive antenna is a.. erm.. telescopic whip style scanner antenna standing… about seven inches tall.. plugged into the back of the repeater… in my basement…
Which might seem dumb…
But I can actually use the repeater reliably from work.
… how? I’m really not sure.. but.. I know TDMA has a lot better survivability than analog voice when it comes to getting through the noise floor in a usable way.
Check this out:
On the map, B is where I work, and A is the repeater’s home in my basement..
Note the size of the antenna compared to the Yaesu. No vertical gain there at all..
Notice that the Yaesu HT sitting to the left of it is listening to an active signal, same frequency as the XPR 6550 HT on the right.. The signal is sometimes an S2. Usually S0 or S1, sometimes not even there.
Mind you, the length of the Yaesu HT’s antenna is more than three times as long as the Motorola’s!!!
If it were an analog signal, it would be unintelligible. But it is audible, clear, and readable.
I had the same experience on the drive in to work today. Notice on the map. Between “Best Buy” and the number 37 on the map above it, I was very shadowed due to the hills near where it says Grand Traverse Crossing and East/North of that. I had almost NO signal.. on my MOBILE radio with an external antenna in the car, I could barely hear the repeater’s signal. It was not present more than it was. if it was a voice, I would no way have been able to comprehend it. .. the Motorola HT, with just the stub duck, on the SEAT of my car, inside the car, just sitting there horizontally.. I could UNDERSTAND the audio coming out of it.
It’s been a good while since I’ve seen a digital mode so easily and obviously out-perform analog modes. I’m very impressed.
I am anxious to finish getting the StationMaster antenna on the permanent tower, hardline up, and repeater moved to the final location…
tonight: duplexer fun! Perhaps even a better receive antenna. I still can’t believe it’s … usable! with no duplexer… from across town… from a whip in the basement!!