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Re: Initial Reaction

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  • vk7yxx
    I m hoping there is enough interest in this project to make it viable. The DVRPTR V1 board is a solid platform and was initially very affordable. The direction
    Message 1 of 6 , Dec 5, 2012
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      I'm hoping there is enough interest in this project to make it viable. The DVRPTR V1 board is a solid platform and was initially very affordable. The direction of DVRPTR development seems to have changed significantly, and this is a concern.

      There are three areas I see as an issue:

      - Hardware availability
      - Cost
      - Long term support

      It's interesting to note that during the crossover period from V1 to V2, literally months, there has been no DVRPTR solution available. Stocks of V1 boards are gone and no real supply of V2 boards has replaced it.

      On top of this, the original price of the DVRPTR board was just €66 shipped. Now it's €105. Personally, I can see the V1 board being more like US/AU$80-100 plus a reasonable amount for shipping (maybe $10, not €22).

      I'm also feeling uncomfortable about long term support for the V1 board given the concerted push behind V2. At the moment the V1 board seem to be an after-thought.

      As far as development goes, I'm also hoping to be able to help.

      I really hope this project hasn't missed the boat. When the DVRPTR was initially released there was great interest, far out-stripping supply, but the whole project has been tainted by lack of communication and hardware availability. If this can be overcome in a new incarnation then I'm confident that ground can be regained.

      Don / VK7YXX.

      --- In DVRPTR_V1@yahoogroups.com, "bruce.given" <bruce.given@...> wrote:
      >
      > Wow
      > that blew my socks off , what a great response !!
      > Appreciate all the great feedback that I have had from everybody.
      >
      > My purpose in bringing the DVRPTR_V1 back into production is
      > 1. Keep it as a low cost solution
      > (We may offer it in two versions one with the box and cables, the second as a bare board)
      > 2. Encourage software development on this platform.
      > (More to come on this.)
      > 3. Provide superior support and service to the ham community
      > (Will ship anywhere on the planet for reasonable rates )
      >
      > Well that’s it for now and I promise VERY regular updates as this thing gains steam !
      > As always please feel free to drop me a email if you have any questions and I will do my
      > darnest to get back to you as soon as possible
      >
      > 73’s
      > Bruce VE2GZI
      > Bruce.Given@...
      >
    • Howard
      Bruce Thanks for running with the ball when the rest of us just sat by.. I have two V1 boards which meet my present needs but I will definitely need at least
      Message 2 of 6 , Dec 8, 2012
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        Bruce

        Thanks for running with the ball when the rest of us just sat by..

        I have two V1 boards which meet my present needs but I will definitely need at least one more so hope this goes ahead.

        The other thing that would be a boost in potential numbers would be firmware to support P25. I have no doubt that there are many P25 afficionados who would jump at such a modem, as would I!

        All the best with the project.

        Howard
        Vk4BS/VK4RPH
      • do1fjn
        Hi Howard, A year before I tried C4FM and played with a raised-cosine shaping filter... For an C4FM, APCO P.25 phase I modem a really good demodulator (good
        Message 3 of 6 , Dec 10, 2012
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          Hi Howard,

          A year before I tried C4FM and played with a raised-cosine shaping filter...
          For an C4FM, APCO P.25 phase I modem a really good demodulator (good clock recovery) is needed. I'm not good to develop signal-processing things, so I still renew my appeal to specialists to join developing here...
          I will support, program and integrate an alternative P.25 firmware if some one will introduce me for necessary filters and algorithms...

          Btw. I will happy about a well calculated clock recovery + filter solution for GMSK.

          73,
          Jan
        • Howard Small
          Thanks for the info Jan. Let s hope someone with the necessary skills can help out. Howard From: DVRPTR_V1@yahoogroups.com [mailto:DVRPTR_V1@yahoogroups.com]
          Message 4 of 6 , Dec 10, 2012
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            Thanks for the info Jan. Let’s hope someone with the necessary skills can help out.

             

            Howard

             

            From: DVRPTR_V1@yahoogroups.com [mailto:DVRPTR_V1@yahoogroups.com] On Behalf Of do1fjn
            Sent: Monday, 10 December 2012 6:40 PM
            To: DVRPTR_V1@yahoogroups.com
            Subject: [DVRPTR_V1] Re: V1 Boards and P25

             

             

            Hi Howard,

            A year before I tried C4FM and played with a raised-cosine shaping filter...
            For an C4FM, APCO P.25 phase I modem a really good demodulator (good clock recovery) is needed. I'm not good to develop signal-processing things, so I still renew my appeal to specialists to join developing here...
            I will support, program and integrate an alternative P.25 firmware if some one will introduce me for necessary filters and algorithms...

            Btw. I will happy about a well calculated clock recovery + filter solution for GMSK.

            73,
            Jan

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