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shat 12 volt powersuppply rxtx soft rock radio

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  • realhipp77
    what size power supply for 12volt txrx soft rock radio? how many amps? it use
    Message 1 of 4 , Sep 23, 2013
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      what size power supply for 12volt  txrx soft rock radio?
      how many amps?
      it use
    • Alan
      ... Subject: [softrock40] shat 12 volt powersuppply rxtx soft rock radio ... One Amp is more than enough. 73 Alan G4ZFQ
      Message 2 of 4 , Sep 23, 2013
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        ----- Original Message -----
        Subject: [softrock40] shat 12 volt powersuppply rxtx soft rock radio


        >
        >
        > what size power supply for 12volt txrx soft rock radio?
        > how many amps?
        > it use
        >
        >

        One Amp is more than enough.

        73 Alan G4ZFQ
      • Gerry Creager - NOAA Affiliate
        Which leads to another question: How good should the regulation be? 73 gerry n5jxs ... -- Gerry Creager NSSL/CIMMS 405.325.6371 ++++++++++++++++++++++ ôBig
        Message 3 of 4 , Sep 24, 2013
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          Which leads to another question: How good should the regulation be? 

          73 gerry n5jxs


          On Tue, Sep 24, 2013 at 1:37 AM, Alan <alan4alan@...> wrote:
           


          ----- Original Message -----
          Subject: [softrock40] shat 12 volt powersuppply rxtx soft rock radio

          >
          >
          > what size power supply for 12volt txrx soft rock radio?
          > how many amps?
          > it use
          >
          >

          One Amp is more than enough.

          73 Alan G4ZFQ




          --
          Gerry Creager
          NSSL/CIMMS
          405.325.6371
          ++++++++++++++++++++++
          “Big whorls have little whorls,
          That feed on their velocity; 
          And little whorls have lesser whorls, 
          And so on to viscosity.” 
          Lewis Fry Richardson (1881-1953)
        • vbifyz
          ... Subject: [softrock40] shat 12 volt powersuppply rxtx soft rock radio ... One Amp is more than enough. 73 Alan G4ZFQ -- Gerry Creager NSSL/CIMMS
          Message 4 of 4 , Sep 25, 2013
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            Regulation is not that important. There is a built in 7805 5V regulator for all circuits except finals. 2-3V change under line and load change conditions is ok.

            However, low noise is critical. Most switching power supplies are not good for this use, although some work well.

            An old linear wall wart in 500mA-1A range (even with no regulator) is the best. Usually the voltage rating is for the max load, so you need to measure the actual output at idle and under 300mA load and make sure the no load voltage is below 14-15V and under load is around 10-12V. A wall wart rated at 9V/1A would be a good choice (rated at 12V can go up to 18V when idle).


            73, Mike



            ---In softrock40@yahoogroups.com, <gerry.creager@...> wrote:

            Which leads to another question: How good should the regulation be? 

            73 gerry n5jxs


            On Tue, Sep 24, 2013 at 1:37 AM, Alan <alan4alan@...> wrote:
             

            ----- Original Message -----
            Subject: [softrock40] shat 12 volt powersuppply rxtx soft rock radio

            >
            >
            > what size power supply for 12volt txrx soft rock radio?
            > how many amps?
            > it use
            >
            >

            One Amp is more than enough.

            73 Alan G4ZFQ



            --
            Gerry Creager
            NSSL/CIMMS
            405.325.6371
            ++++++++++++++++++++++
            “Big whorls have little whorls,
            That feed on their velocity; 
            And little whorls have lesser whorls, 
            And so on to viscosity.” 
            Lewis Fry Richardson (1881-1953)
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