Archive for category DARPA

GMSK Repeater Progress

Hello to the group,

Just want to give an update on the home brew GMSK digital repeater.

I am getting closer to the operations of the digital repeater. I have been running a lot of test to set the configuration up for the GMSK modem.  With the new setting we got audio to come a cross the D-Star radio from the repeater.  The audio is not quite ready for prime time but it’s a start. It looks like  I need to condition the audio TX line to bring the audio to a  level that is understandable. Right now I’m getting the R2D2 sound and on some occasion you can hear legible audio.

If anybody out there has a D-Star radio [in the Madison / Huntsville area], tune to UHF repeater 443.025+ offset and tell me what you hear if you can. You can send e-mail by way to the group e-mail.

I’ve also pick up a HP server in to serve as a home-brew ICOM-compatible G2 Gateway. The program is called dstar_g2_gwy.  Here is where the Linux guru come in and install and configure the dstar _g2_gwy.  As soon I get the GMSK repeater working fully, I will then turn to install CentOS 5.3 to run the Gateway.

Will / W4WWM


GMSK_RepeaterInterface_GM300

GMSK Repeater Interface for Motorola Radios

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DARPA

DARPA - Digital Amateur Radio Project Association

Supporting Sponsors – Supporting Us

How is this site being funded?

May be a question that some are asking.   Through sponsorship the necessary resources are made available, there’s a cost involved though and we need to be sure that we support our sponsors that support us.

Here is the list of our current sponsors:

Support Sponsors – Supporting Us

GMSK DSTAR Repeater Hardware $100

New GMSK DSTAR Repeater Hardware Project $100

The two photos below are of the new GMSK Modems that will act like a digital repeater controller. They are able to pass D-STAR signals. These two cards will enable the local repeater to connect to other internet based DSTAR Gateways and reflectors. Will W4WWM is in the process of programming the PIC Chip with new Firmware.

More Information on the GMSK DSTAR Hotspot Visit the websites below

http://www.g7ltt.com/hotspot/ http://www.dutch-star.nl

GMDK ModemGMSK Modems


Support

Screamin Dude - Ambulance

This is the place to go for support.