News

ThumbDV™: DUTCH*Star Support Under Development

Fred (PA4YBR) at DUTCH*Star has been working on support for the ThumbDV™ in his Node DV/WinDV program.

It is now in beta test and working well.  Watch for more information at http://dutch-star.eu/

Watts Up with the UDRX

After taming some parasitic oscillation, the UDRX is now driving the Power Amplifier Module successfully. We’ll be optimizing the output filter and RX/TX switch next, which will require a minor board spin. Preliminary thermal analysis shows we’re in the ballpark for dissipation. We’ll have detailed analysis after the built-in monitoring is brought up and we evaluate Mitsubishi’s newer version of the module which has better shielding and thermals.

We still have a ways to go, but firing up the PA is a significant milestone.
Bryan – K7UDR

 

Delivery is in the eye of the beholder

Just finished showing the APRS 9600 Transmit Demo at Pacificon.

Dennis has the IQ Receiver socket pushing data thru to his workstation allowing post processing of the eye pattern. Here’s a snapshot:

eye

At this point we’re pretty comfortable with accepting orders for the UDRX this year for delivery in Q1!

I will continue to post progress updates as we move forward.

News from DCC in Austin

Basil has the complete AX25 stack bolted to the transmitter. Proto 3 was shown tossing 9600 APRS packets to a Yaesu VX-8 at DCC in Austin. This includes the socket interface with support for IPV4 and V6.

We are now doing compatibility testing with commonly deployed 9600 TNCs. We don’t anticipate any issues with any properly functioning TNC, this is just a verification list:

  • Kantronics 9612 plus
  • Timewave PK96
  • Yaesu VX-8
  • Kenwood D710

Dennis has a non-coherent receiver working (it actually does FM Voice) which is the front end for the decoder. He is also working on a coherent receiver for higher speed modems which will give us an additional few dB.

We will provide another update after Pacificon in a few weeks.

Keep the Faith,
Bryan

UDRX Proto 3 has arrived

6 Units of the third, and hopefully final, UDRX prototype have arrived and passed power-up. We’ll release a complete project up-date at the TAPR/ARRL Digital Communications Conference in Austin TX on September 6th.

Hope to see many of you there,
Bryan – K7UDR

udrx-3

Customs Declaration

To our International Customers:

We all like to save money and don’t always agree with our Government’s Tax Policy.

But please, don’t ask us to falsify the customs declaration on your order.

Thanks,
Bryan K7UDR

International Shipping

I did a quick check today on our International Shipments via the US Postal Service.  Here are the results:

DELIVERED:

  • Australia
  • Canada
  • France
  • Netherlands
  • Poland
  • Spain
  • Switzerland
  • United Kingdom

HELD FOR PAYMENT:

  • Germany

STILL IN PROCESS:

  • Belgium
  • Ireland
  • Italy
  • Japan
  • Norway
  • Russia
  • Ukraine

DV3000 Back in Stock

We have have received another batch of 100 and all back-orders have been filled leaving about 70 in stock.

We’re working on some app notes as well.

Well that was quick …

The first 100 DV3000s are sold at the intro sale price and have been shipped to 10 different countries. We have started a new build cycle and are accepting back-orders. We intend to maintain units in stock after that.

Thanks for getting this off to a great start!

Preparing the Raspberry Pi for DV3000 Applications

See the basic installation instructions for the DV3000 and the dv3000d daemon in the document DV3000 – AMBEServer

Note: All production DV3000 units are configured for 230400 bps and do not have jumpers. 115200 bps is insufficient, but the board can be easily modified to add jumpers to configure baud rate, see the schematic at in the datasheet.

The dv3000d is the basic building block for the first set of applications for the DV3000.  It is a server which receives PCM audio over a UDP socket and returns AMBE or receives AMBE and returns audio.

DummyRepeater from the Yahoo! pcrepeatercontroller forum can access the daemon either locally or over a UDP/IP link. DummyRepeater in conjunction with ircDDBGateway will allow you to link to reflectors and repeaters around the world.  See notes.

You will also find utilities to convert between ‘wav’ and ‘dvtool’ or ‘ambe’ files in the ircDDBGateway file AMBETools.