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Re: cleaning and adjusting a Vibroplex

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  • k4oso
    AI4RE, Sounds like you figured it out pretty well. Thats the same way I learned to use a bug. You should be fine. 73, Milt k4oso SKCC 180C ... spring ...
    Message 1 of 5 , Dec 7, 2006
      AI4RE,
      Sounds like you figured it out pretty well. Thats the same way I
      learned to use a bug. You should be fine.
      73, Milt k4oso
      SKCC 180C
      --- In cw_bugs@yahoogroups.com, "ai4re" <ai4re@...> wrote:
      >
      > --- In cw_bugs@yahoogroups.com, KT5X@ wrote:
      > > Adjusting a bug. the old-timers insisted upon sizable gaps. In
      > fact, a
      > > signficant gap for the dit lever moved against a significant
      spring
      > > resistance sets up a good vibration of the mainspring for
      producing
      > dits and
      > > avoiding the dreaded split dit.
      >
      > I've been using my Vibroplex bug for a couple months now. I've had
      > no one to show me how to work it and none set up by someone who
      knew
      > what they were doing to look it. In fact, I'd never seen a bug in
      > person before mine arrived in the mail. I wish I had one to look
      at
      > to see what typical adjustments are. If there are "typical"
      > adjustments.
      >
      > In my research, I've read to keep the gaps as small as possible to
      > allow a quick transition from dot to dash, which seems to be a
      common
      > problem with bug users. This seems to go against this advice.
      > Anyway, I set the gaps small, and was actually surprised how small
      I
      > could get the dot gap and still set up reliable oscillations that
      > last for at least 20 dots. By accounts of people who hear me,
      > (assuming they're honest and not just being polite) my transitions
      > seem fine. I've had one ham tell me he thought I was on an
      > electronic keyer before I told him I was on a bug.
      >
      > But I do get "scratchy" dots. This is the first time I've read the
      > term "split dit" and wonder if it's the same thing. I've read that
      > the scratchiness is due to an undesired oscillation of the dot
      > hairspring contact. It has been suggested to put a piece of cotton
      > or similar in the hook of the hairspring to dampen it. I tried
      this,
      > and it didn't seem to do anything.
      >
      > I think some bug users think the scratchiness is due to bad
      > contacts. If you're getting scrathy dashes, maybe so, but I'm
      > beginning to suspect that most problems are the hairspring
      > oscillations.
      >
      > It had occured to me some time ago that if I were to increase the
      dot
      > return tension, the dot contact should be pulled back more quickly
      > when the paddle is released, hopefully before the oscillating
      > hairspring can make contact again. I tried this, but didn't have
      > much luck. I lightened the tension again.
      >
      > Then I read this post the other day. Last night, I increased the
      > tension again, but also opened the gap quite a bit more than I had
      > it. I quickly adapted to it, and haven't heard an unintentional
      > scratchy or split dit since then - and K4VD made me give it a good
      > workout last night in our QSO.
      >
      > The improper space between dots and dashes within a letter that I
      > feared didn't materialize. At least not at my current speed!
      >
      > I left the dash paddle gap very close, like I'd set up an
      electronic
      > paddles. The assymetry doesn't seem to bother me.
      >
      > I'm thinking one of the biggest aspects to learning to use a bug,
      or
      > even a straight key, is to LISTEN to the sidetone rather than focus
      > on the hand motions or stare at the key. Stare off into space or
      > watch your meter when you send, but concrentrate on listening to
      your
      > signal. of course, knowing what good code sounds like is important
      > if you're going to adjust your sending correctly, and I think
      having
      > some experience with computer code lessons and and electronic keyer
      > before trying a bug is helpful.
      >
      > The other thing that took me a while to figure out on my own was
      hand
      > position. I never read really good instructions. And in this
      case,
      > I think the bug and paddle use pretty much the same position. I'd
      > read that the paddle is operated with a "rocking" of the wrist.
      I'd
      > read instructions that say to put your thumb on one paddle and
      index
      > finger on the other.
      >
      > Well, I didn't find that natural, and I ended up using my middle
      > finger on the dash paddle. And how do you rock your wrist?
      >
      > Well, maybe this was obvious to everyone else in the world, but I
      had
      > my palm flat on the table as though I were using a straight key.
      One
      > day, it occurred to me to rotate my hand so my hand were resting on
      > the SIDE of my hand. Amazingly, the index finger preferred to fall
      > on the right paddle opposite the thumb, and I could, indeed, get a
      > rocking motion pivoting on the side of the hand. I also decided
      that
      > I worked the dash lever best with a bend in my finger.
      >
      > I also think I've concluded that Vibroplex has the paddle design
      > correct with the assymetric finger pieces on the recent model bugs.
      >
    • Kevin der Kinderen, K4VD
      Excellent comments John. Until this thread I had no clue what split dots were but I had been plagued by them with all my bugs, new to old. I finally solved it
      Message 2 of 5 , Dec 7, 2006
        Excellent comments John. Until this thread I had no clue what split dots
        were but I had been plagued by them with all my bugs, new to old. I finally
        solved it by running my bugs through a K-5 keyer in hand key mode. I think
        it may be debouncing the contacts which might provide a clue to other
        solutions. From your description below, it might also be covering up
        misadjustments.

        73,
        Kev, K4VD
        HYPERLINK "http://k4vd.net/"http://k4vd.net/



        --
        No virus found in this outgoing message.
        Checked by AVG Free Edition.
        Version: 7.5.432 / Virus Database: 268.15.15/579 - Release Date: 12/7/2006
        1:31 PM



        [Non-text portions of this message have been removed]
      • David J. Ring, Jr.
        Your wrist is rocked with the same motion that you use when opening a door knob, the wrist and are lie on the desk and rock with that motion. Finger motions
        Message 3 of 5 , Dec 7, 2006
          Your wrist is "rocked" with the same motion that you use when opening a door
          knob, the wrist and are lie on the desk and rock with that motion.

          Finger motions are not to be used as they give carpal tunnel syndrome (glass
          arm) the idea is to rock the wrist with a bug and cootie key. Unfortunately
          the paddle used with an electronic keyer must be tapped with fingers at high
          speeds :(

          73

          David N1EA

          ----- Original Message -----
          From: ai4re
          To: cw_bugs@yahoogroups.com
          Sent: Thursday, December 07, 2006 1:51 PM
          Subject: [cw_bugs] Re: cleaning and adjusting a Vibroplex


          --- In cw_bugs@yahoogroups.com, KT5X@... wrote:
          > Adjusting a bug. the old-timers insisted upon sizable gaps. In
          fact, a
          > signficant gap for the dit lever moved against a significant spring
          > resistance sets up a good vibration of the mainspring for producing
          dits and
          > avoiding the dreaded split dit.

          I've been using my Vibroplex bug for a couple months now. I've had
          no one to show me how to work it and none set up by someone who knew
          what they were doing to look it. In fact, I'd never seen a bug in
          person before mine arrived in the mail. I wish I had one to look at
          to see what typical adjustments are. If there are "typical"
          adjustments.

          In my research, I've read to keep the gaps as small as possible to
          allow a quick transition from dot to dash, which seems to be a common
          problem with bug users. This seems to go against this advice.
          Anyway, I set the gaps small, and was actually surprised how small I
          could get the dot gap and still set up reliable oscillations that
          last for at least 20 dots. By accounts of people who hear me,
          (assuming they're honest and not just being polite) my transitions
          seem fine. I've had one ham tell me he thought I was on an
          electronic keyer before I told him I was on a bug.

          But I do get "scratchy" dots. This is the first time I've read the
          term "split dit" and wonder if it's the same thing. I've read that
          the scratchiness is due to an undesired oscillation of the dot
          hairspring contact. It has been suggested to put a piece of cotton
          or similar in the hook of the hairspring to dampen it. I tried this,
          and it didn't seem to do anything.

          I think some bug users think the scratchiness is due to bad
          contacts. If you're getting scrathy dashes, maybe so, but I'm
          beginning to suspect that most problems are the hairspring
          oscillations.

          It had occured to me some time ago that if I were to increase the dot
          return tension, the dot contact should be pulled back more quickly
          when the paddle is released, hopefully before the oscillating
          hairspring can make contact again. I tried this, but didn't have
          much luck. I lightened the tension again.

          Then I read this post the other day. Last night, I increased the
          tension again, but also opened the gap quite a bit more than I had
          it. I quickly adapted to it, and haven't heard an unintentional
          scratchy or split dit since then - and K4VD made me give it a good
          workout last night in our QSO.

          The improper space between dots and dashes within a letter that I
          feared didn't materialize. At least not at my current speed!

          I left the dash paddle gap very close, like I'd set up an electronic
          paddles. The assymetry doesn't seem to bother me.

          I'm thinking one of the biggest aspects to learning to use a bug, or
          even a straight key, is to LISTEN to the sidetone rather than focus
          on the hand motions or stare at the key. Stare off into space or
          watch your meter when you send, but concrentrate on listening to your
          signal. of course, knowing what good code sounds like is important
          if you're going to adjust your sending correctly, and I think having
          some experience with computer code lessons and and electronic keyer
          before trying a bug is helpful.

          The other thing that took me a while to figure out on my own was hand
          position. I never read really good instructions. And in this case,
          I think the bug and paddle use pretty much the same position. I'd
          read that the paddle is operated with a "rocking" of the wrist. I'd
          read instructions that say to put your thumb on one paddle and index
          finger on the other.

          Well, I didn't find that natural, and I ended up using my middle
          finger on the dash paddle. And how do you rock your wrist?

          Well, maybe this was obvious to everyone else in the world, but I had
          my palm flat on the table as though I were using a straight key. One
          day, it occurred to me to rotate my hand so my hand were resting on
          the SIDE of my hand. Amazingly, the index finger preferred to fall
          on the right paddle opposite the thumb, and I could, indeed, get a
          rocking motion pivoting on the side of the hand. I also decided that
          I worked the dash lever best with a bend in my finger.

          I also think I've concluded that Vibroplex has the paddle design
          correct with the assymetric finger pieces on the recent model bugs.






          No virus found in this incoming message.
          Checked by AVG Free Edition.
          Version: 7.5.432 / Virus Database: 268.15.14/578 - Release Date: 12/7/2006
          1:27 AM
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