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bug users, or semi-automatic I shud say

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  • John
    I got some good feedback for the Jupiter I have , using it with a bug. I am reading up on capacitors to help the choppy dits. What kind of voltage is across
    Message 1 of 3 , Mar 2 6:21 PM
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      I got some good feedback for the Jupiter I have , using it with a bug.
      I am reading up on capacitors to help the choppy dits. What kind of
      voltage is across the terminals of the bug? Would a non-polarized
      capacitor be alright? Jack, N0NV, has quoted a 1uf for the Jupiter's
      keying circuit. Radio Shack has them at 5o volts, non-polarized. The
      voltage rating is probably way to high, but probably doesn't matter.
      The capacitor tutorial recommended twice the voltage of the circuit,
      but I don't think this application is what the tutorial was talking
      about. I know I am way ahead of myself here. But I am collecting
      data. and want to have things ready for the arrival of my bug. Does
      anyone have opinions of what kind of capacitors to use and what values
      have different affects to the sound of the dit circuit? John K3JK
    • nzeronv
      John: Without typing out a mini-course in basic electronics, I can only tell you that the effect of a capacitor will sustain the voltage of the keying circuit
      Message 2 of 3 , Mar 2 7:08 PM
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        John:

        Without typing out a mini-course in basic electronics, I can only tell
        you that the effect of a capacitor will sustain the voltage of the
        keying circuit during the intermittent periods of the dot contact. I
        had the luxury of a junk box full of various values to try before I
        arrived at 1 uF. I possibly could have got by with slightly less.

        Don't be getting ahead of yourself. Try to duplicate the 'choppy dit'
        symptom first, so you know what I'm referring to. Then if necessary,
        try the adjustment technique -- it might be all you need to do. Then
        try the capacitor and see if you notice any difference. First things
        first, Rome wasn't built in a day, etc. etc.

        Good luck / 73

        Jack - N0NV


        --- In cw_bugs@yahoogroups.com, "John" <klokis@...> wrote:
        >
        > I got some good feedback for the Jupiter I have , using it with a bug.
        > I am reading up on capacitors to help the choppy dits. What kind of
        > voltage is across the terminals of the bug? Would a non-polarized
        > capacitor be alright? Jack, N0NV, has quoted a 1uf for the Jupiter's
        > keying circuit. Radio Shack has them at 5o volts, non-polarized. The
        > voltage rating is probably way to high, but probably doesn't matter.
        > The capacitor tutorial recommended twice the voltage of the circuit,
        > but I don't think this application is what the tutorial was talking
        > about. I know I am way ahead of myself here. But I am collecting
        > data. and want to have things ready for the arrival of my bug. Does
        > anyone have opinions of what kind of capacitors to use and what values
        > have different affects to the sound of the dit circuit? John K3JK
        >
      • David Ring
        ... If you use a 1 mfd (sic) capacitor in a tube transceiver, it will sound like the Big Ben bell sound! Of course, it is 1,000 times the recommended 1 ufd
        Message 3 of 3 , Mar 2 8:54 PM
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          <nzeronv@...> wrote:
          >
          > John:
          > I had the luxury of a junk box full of various > values to try before I arrived at 1 uF. I possibly > could have got by with slightly less.

          If you use a 1 mfd (sic) capacitor in a tube transceiver, it will
          sound like the Big Ben bell sound! Of course, it is 1,000 times the
          recommended 1 ufd value!

          73

          DR
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