Re: {NVFMA-General}

[w3...@cox.net]

When is the next Pickett St. meeting?


---- Dan Sullivan <djs...@gmail.com> wrote:
> Curious if anyone is playing with DMR? I am working back in DC and will be moving back in the next few months. Pondering radio choices and DMR has me curious. Looks like only two machines cover parts of the NCR though.
>
> Thanks.
>
> Dan S.
> KO1D
>
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[Jason - K4JWT]

Dan,

I'm enjoying the coverage of DMR in the region. The Upper Marlboro repeater has reach with a CS700 nearly out to Fair Lakes, then switch over to Haymarket (they're connected for local).

I'm looking forward to them adding the user activated talk groups on those machines.

Hope this helps. What hardware are you using for DMR? I'm considering Moto, as the roaming would be nice, and easier programming/code plugs.

-Jason, K4JWT

[Dan Sullivan]

So the CS700 with rubber ducks or mobile is your setup?

I haven't any gear but all the excitement has me pondering getting something. CS most attractive due to price.

Sent from my iPhone

[John]

Dan,
DMR?
CS?
John

> On May 3, 2015, at 2:19 PM, Dan Sullivan <djs...@gmail.com> wrote:
>
> So the CS700 with rubber ducks or mobile is your setup?
>
> I haven't any gear but all the excitement has me pondering getting something. CS most attractive due to price.
>
> Sent from my iPhone
>
>> On May 3, 2015, at 1:56 PM, Jason - K4JWT <jwtra...@gmail.com> wrote:
>>

[Dan Sullivan]

DMR is another digital voice mode that is TDMA based (like cell phones). It is a bit more robust and clear on voice than DStar as it is an open, commercial mode. It is very popular for commercial applications not using P25. It's weakness that I see is no DD equivalent at this time. It's voice only so no data like text messages or networking that DStar does well. See http://www.dmr-Marc.net for more info.

Most (95%) activity is UHF, specifically 70cm. Eastern New England is VHF largely due to issues with OTH Radar on Cape Cod. I've heard rumors of 900Mhz but not sure where.

CS, or Connect Systems, is a resale r of a Chinese DMR rig that seems pretty good and is cheap. They are completing a painful transition right now. The rig is designed between CS and a Chinese engineer. The code was written by a consultant who wouldn't fix issues or let CS modify the code. So they wrote their own which has held up a lot of progress. With that issue seemingly resolved they are now moving forward with rigs that are more Ham friendly. Their web page is: http://www.connectsystems.com

Motorola has their own twist on DMR called MotoTrbo. It's DMR with a few bells and whistles (kinda like Android is open but various builds have unique aspects.)

DMR-MARC is the biggest network in the world, but not the only one. Lots more to explain but this should open the door.

Dan S.

Sent from my iPhone

[John]

Dan,
Thanks. That is a fine response. I’ll read up on this.
John

> On May 3, 2015, at 4:24 PM, Dan Sullivan <djs...@gmail.com> wrote:
>
> DMR is another digital voice mode that is TDMA based (like cell phones). It is a bit more robust and clear on voice than DStar as it is an open, commercial mode. It is very popular for commercial applications not using P25. It's weakness that I see is no DD equivalent at this time. It's voice only so no data like text messages or networking that DStar does well. See http://www.dmr-Marc.net for more info.
>
> Most (95%) activity is UHF, specifically 70cm. Eastern New England is VHF largely due to issues with OTH Radar on Cape Cod. I've heard rumors of 900Mhz but not sure where.
>
> CS, or Connect Systems, is a resale r of a Chinese DMR rig that seems pretty good and is cheap. They are completing a painful transition right now. The rig is designed between CS and a Chinese engineer. The code was written by a consultant who wouldn't fix issues or let CS modify the code. So they wrote their own which has held up a lot of progress. With that issue seemingly resolved they are now moving forward with rigs that are more Ham friendly. Their web page is: http://www.connectsystems.com
>
> Motorola has their own twist on DMR called MotoTrbo. It's DMR with a few bells and whistles (kinda like Android is open but various builds have unique aspects.)
>
> DMR-MARC is the biggest network in the world, but not the only one. Lots more to explain but this should open the door.
>
> Dan S.
>

> Sent from my iPhone
>

>> On May 3, 2015, at 3:57 PM, John <jtra...@cox.net> wrote:
>>
>>

[Dan Sullivan]

Anytime John.

One huge plus for DMR, since it's time based you can have 2 simultaneous, independent QSOs use the same machine and network at a time. More efficient system that way.

Sent from my iPhone

[Tom Azlin W7SUA]

Only huge if there are enough users to want two channels!

Hi Dan.

73, tom w7sua ( Chino Valley AZ)