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Blue Racer - modern version - update

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  • Chuck Chandler
    Again, many thanks for the help of the listmembers. I appear to have resolved the issue. First, let me reply to a few points. This is a new version Blue
    Message 1 of 4 , Jun 28, 2012
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      Again, many thanks for the help of the listmembers.  I appear to have resolved the issue.  First, let me reply to a few points.

      This is a new version Blue Racer, essentially a standard on a narrow base, without a shorting bar.

      The Vibroplex burnishing tool is a narrow strip of fine emory-like cloth.  It's a tool in an anthropological sense (think a monkey poking a stick into an antheap) rather than in a Tim Allen sense.  Does it do any better than plain paper or a business card?  I dunno, but it on their website and I paid like $4 for it, so I'm using it.  I doubt it does anything more than the old methods.

      I do have a small capacitor across the contacts - I have one installed inside the plug housing on all my bugs.  The modern rigs like it, and the tube rig doesn't seem to mind it at all.  It's a really neat trick.


      So, to the fix.  The fact that this versions is missing the braided wire some have (as someone here pointed out) led me to look at simple continuity issues.  When I loosened, moved, and re-tightened the screw holding the donut-shaped mount for the dot leaf spring on the pendulum arm, that helped quite a bit.  A small bit of corrosion may have been making a poor path.  Cleaning that almost, but not entirely, eliminated the scratchy dots.

      The other dot spring, the coil-type tension spring, was also loose.  Is this a part of the electrical path?  I haven't bothered to trace it out yet, and I'm running late for work, but moving that with my finger created scratchy dots.  I tightened it down a good bit, compressing it to roughly half what it was, then wriggled the small piece that goes into the pendulum arm to capture it.  That seems, so far, to have eliminated the issue entirely.

      So far a couple of QSOs have shown the only errors are those of my own making.  

      Again, thanks to the listmembers for help.  I would have floundered around for who knows how long without you all.

      vy 73 de Chuck, WS1L

      --


      ===================
      Chuck Chandler
      ===================

    • D.J.J. Ring, Jr.
      Hello Chuck, To answer your question, I will quote from my message to this group in response to your request for help: Now the ONLY connection is the *dot
      Message 2 of 4 , Jun 28, 2012
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        Hello Chuck,

        To answer your question, I will quote from my message to this group in response to your request for help:


          Now the ONLY connection is the dot tension spring.  Make sure you have sufficient tension on the spring to avoid loss of continuity.

        I have made the significant words bold.

        Yes the coil dot tension spring is the only ground return path now.

        73
        Gopher Hole:  gopher://sdf.org/1/users/djringjr/ (native or with Firefox's Overbite extension) or via http to gopher gateway
        Chat Skype: djringjr MSN: djringjr@... AIM: N1EA icq: 27380609

        =30=



        On Thu, Jun 28, 2012 at 8:18 AM, Chuck Chandler <chandlerusm@...> wrote:


        Again, many thanks for the help of the listmembers.  I appear to have resolved the issue.  First, let me reply to a few points.

        This is a new version Blue Racer, essentially a standard on a narrow base, without a shorting bar.

        The Vibroplex burnishing tool is a narrow strip of fine emory-like cloth.  It's a tool in an anthropological sense (think a monkey poking a stick into an antheap) rather than in a Tim Allen sense.  Does it do any better than plain paper or a business card?  I dunno, but it on their website and I paid like $4 for it, so I'm using it.  I doubt it does anything more than the old methods.

        I do have a small capacitor across the contacts - I have one installed inside the plug housing on all my bugs.  The modern rigs like it, and the tube rig doesn't seem to mind it at all.  It's a really neat trick.


        So, to the fix.  The fact that this versions is missing the braided wire some have (as someone here pointed out) led me to look at simple continuity issues.  When I loosened, moved, and re-tightened the screw holding the donut-shaped mount for the dot leaf spring on the pendulum arm, that helped quite a bit.  A small bit of corrosion may have been making a poor path.  Cleaning that almost, but not entirely, eliminated the scratchy dots.

        The other dot spring, the coil-type tension spring, was also loose.  Is this a part of the electrical path?  I haven't bothered to trace it out yet, and I'm running late for work, but moving that with my finger created scratchy dots.  I tightened it down a good bit, compressing it to roughly half what it was, then wriggled the small piece that goes into the pendulum arm to capture it.  That seems, so far, to have eliminated the issue entirely.

        So far a couple of QSOs have shown the only errors are those of my own making.  

        Again, thanks to the listmembers for help.  I would have floundered around for who knows how long without you all.

        vy 73 de Chuck, WS1L

        --


        ===================
        Chuck Chandler
        ===================




      • Joe V31JP
        Great, Chuck. ... I missed that this was a new version BR, but is it a Deluxe, chrome base with jeweled pivot? See below. ... The burnishing tool should be,
        Message 3 of 4 , Jun 28, 2012
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          Great, Chuck.

          On 6/28/2012 7:18 AM, Chuck Chandler wrote:
          > This is a new version Blue Racer, essentially a standard on a narrow
          > base, without a shorting bar.
          I missed that this was a 'new version' BR, but is it a Deluxe, chrome
          base with jeweled pivot? See below.
          >
          > The Vibroplex burnishing tool is a narrow strip of fine emory-like
          > cloth. It's a tool in an anthropological sense (think a monkey poking
          > a stick into an antheap) rather than in a Tim Allen sense. Does it do
          > any better than plain paper or a business card? I dunno, but it on
          > their website and I paid like $4 for it, so I'm using it. I doubt it
          > does anything more than the old methods.
          The burnishing tool should be, a good one, with a very fine (flour)
          coating of diamond to polish (burnish) a contact. The paper, with or
          without alcohol will also, but to a lesser
          degree and all will also clean dirt off. It is a whole study of how
          contacts works and how they fail to work correctly. I spent way too may
          hours while in the US Air Force cleaning,
          polishing, replacing and adjusting, including setting tensions of relay
          contacts in an automatic Teletype switching center, W/U Plan 55.
          Probably why my eyes or going.
          >
          > I do have a small capacitor across the contacts - I have one installed
          > inside the plug housing on all my bugs. The modern rigs like it, and
          > the tube rig doesn't seem to mind it at all. It's a really neat trick.
          This does well and covers for minute contact irregularities. A good
          contact debounce circuit does even better.
          >
          > The other dot spring, the coil-type tension spring, was also loose.
          > Is this a part of the electrical path? I haven't bothered to trace
          > it out yet, and I'm running late for work, but moving that with my
          > finger created scratchy dots. I tightened it down a good bit,
          > compressing it to roughly half what it was, then wriggled the small
          > piece that goes into the pendulum arm to capture it. That seems, so
          > far, to have eliminated the issue entirely.
          The key's pendulum is basically a grounding bar. When you press on the
          dash knob, you are pressing the dash contact to the dash post contact
          which is connected to your
          keying line. When you press the paddle and it strikes its stop, the bar
          vibrates and the dot spring contact bonces on the dot post contact which
          is also connected to you keying
          line. Both of the post contacts are fairly stable connections. Where
          irregularities come in is with continuity to the ground side of the
          keying line and the lever bar and its two
          contacts. As you found, the dot spring contact was loose on the bar.
          Poor connection. The dot return spring, particularly on the jewel
          pivoted Deluxe without the ground braid
          wire provides the ground connection for the bar. (Thanks, DR. I did not
          realize they stopped putting the braid on late models.) On none-Deluxe
          models, the arbor/pivot pin
          is held between two grounded pivot seats. Dirt in these seats as DR
          pointed out causes a poor or irregular connection to ground.

          I am very glad you have it working well now, Chuck. Have fun.

          --
          161, Joe, Ronnie(Rowena), Marty & Sidney Pontek
          P.O. Box 280, Dangriga, Stann Creek District
          (Hopkins Village) Belize
          011-501-503-7346 Belize
          011-501-666-3564 Belize (cellular)
          or
          5204 Texas Highway 49 W
          Omaha, TX 75571-6474
          U.S.A.
          903-424-4267 (My cellular when in Texas)
          Also, K8JP, member FOC1743,CWops876,QCWA-LM21894,OOTC4607,A1OP,SKCC3171T,NAQCC5798,FISTS7625CC951,FP-2819
          LotW Skype: v31joepalooka
          http://www.justanswer.com/lp-1eh8-tool-repair
          I am looking for Vibroplex Model X, Double lever, Zephyr, Lionel J-36 and prefer basket cases to restore.
        • Donnie
          Chuck: Glad you were able to get the problem resolved. That s one of the great things about this group, you always get lots of help and suggestions with a
          Message 4 of 4 , Jun 28, 2012
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            Chuck:
            Glad you were able to get the problem resolved. That's one of the great things about this group, you always get lots of help and suggestions with a problem.

            Regards, Donnie

            On Jun 28, 2012 8:18 AM, "Chuck Chandler" <chandlerusm@...> wrote:
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