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SoftRock Lite II circuit board

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  • kb9yig
    Good Evening All, The circuit board for the SoftRock Lite II kit is through the layout phase and will be checked this weekend. Circuit boards will go on order
    Message 1 of 1 , Dec 20, 2008
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      Good Evening All,

      The circuit board for the SoftRock Lite II kit is through the layout
      phase and will be checked this weekend. Circuit boards will go on
      order Monday, December 22. The board may be seen in the files area
      in the new SoftRock Lite II docs folder. I will get the Lite II
      schematic posted later this weekend.

      The Lite II circuit board size is 2.5 inches by 0.9 inches. All SMT
      components are mounted on the bottom of the board and I think overall
      the board will be easier to build than the earlier SoftRock Lite kit.

      Since the Lite II is intended as a low cost SDR receiver sampler the
      circuit has been simplified from the earlier SoftRock Lite. Changes
      include synchronous clocking of the QSD by a single 74AC74. This
      results in only a division of four from all crystal oscillator
      frequencies. One hundred ohm resistors are included on the board in
      each audio output output to the soundcard line-in to help prevent
      some op-amp failures experienced with the earlier SoftRock Lite kits.

      Kits to be offered in early January will include a 160m kit, an 80m
      kit, and a 40m kit where each kit price will be the usual $10 for
      US/Canada and $11 for DX with mailing costs included in each kit
      price. Other kits to be offered will include an upgraded 30m kit, an
      upgraded 20m kit and an upgraded 15m kit. Each of the upgraded kits
      will be $12 for US/Canada and $13 for DX with postage cost included
      in each kit price. The upgraded kits will all make use of 1/3 sub-
      harmonic sampling but will have an LT6231 op-amp in the audio stage.

      Thanks for the many positive comments concerning the value of the
      SoftRock Lite as a low cost mean of letting people sample SDR.

      Thanks and 73,
      Tony KB9YIG
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