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Re: [cw_bugs] Adjustment help for Blue Racer (Mobile, AL version)

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  • George
    Chuck, This behavior sounds like some thing is lose. Also if you are getting dozens of dits is it possible that someone replaced the spring (sheet metal on
    Message 1 of 5 , Jun 26, 2012
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      Chuck,
      This behavior sounds like some thing is lose.  Also if you are getting dozens of dits is it possible that someone replaced the spring (sheet metal on dit bar) with a stiffer spring.  This would certainly make adjustment hyper critical. 

      The Blue Racer is a higher speed bug, but can you compare the spring stiffness with another Vibroplex? 

      73,
      George
      W2GS
      On 6/26/2012 7:45 PM, Chuck Chandler wrote:
       

      I picked up a recent-vintage Blue Racer at the Slidell, LA hamfest last year and have been using it for a while... it's my third bug, after a 1969 standard and a 1957 Lightning.  This one seems *VERY* touchy on the dits - there is a tendency to not hold the same adjustment even for a single QSO.


      I can adjust the dits to the point where I can get the points to barely close at rest - it will give dozens and dozens of dits before getting scratchy - and will sound fine - and then the next QSO it will start sending scratchy sounding dits.

      I have placed a .01 uf cap across the key line (inside the plug housing) on all 3 of my bugs, and it seems to help the other two on modern rigs.

      This one has me baffled.

      The pendulum arm, at rest, is barely touching the damper.  

      Any other suggestions would be appreciated!

      73 de Chuck, WS1L


      --


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



    • Joe V31JP
      Some questions, Chuck, as we have determine what is changing. You have it set up, it sounds like it should be, with the lever bar at its lever stop screw which
      Message 2 of 5 , Jun 26, 2012
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        Some questions, Chuck, as we have determine what is changing.

        You have it set up, it sounds like it should be, with the lever bar at its lever stop screw which is adjusted so that the rod just touches the damper.

        When it goes bad, do you have to re-adjust the lever stop screw?

        When it goes bad, with the lever pressed to the dot side and is at full stop (not vibrating), do you have to re-adjust the dot station contact?

        Funny about your capacitor solution, an old contact bounce cure that sort of worked and came to mind with this Champion I am using.
        I had cleaned my contacts with dry, clean paper, an alcohol soaked strip of 24# bond paper before I put it in use, but it had the
        occasional sound of contact bounce.  As I was at the bench, I saw my burnishing tools and applied one to the dot contacts.  Problem
        fixed.  It may have been a tiny tit or a very small encrusted bit of crud, but good now.  Maybe a similar problem? I noticed just before I
        burnished the contact, as I turned the stationary contact screw when they were closed as scratchy sound I had not heard before.

        Lets go from here, Chuck.

        On 6/26/2012 7:45 PM, Chuck Chandler wrote:
         

        I picked up a recent-vintage Blue Racer at the Slidell, LA hamfest last year and have been using it for a while... it's my third bug, after a 1969 standard and a 1957 Lightning.  This one seems *VERY* touchy on the dits - there is a tendency to not hold the same adjustment even for a single QSO.


        I can adjust the dits to the point where I can get the points to barely close at rest - it will give dozens and dozens of dits before getting scratchy - and will sound fine - and then the next QSO it will start sending scratchy sounding dits.

        I have placed a .01 uf cap across the key line (inside the plug housing) on all 3 of my bugs, and it seems to help the other two on modern rigs.

        This one has me baffled.

        The pendulum arm, at rest, is barely touching the damper.  

        Any other suggestions would be appreciated!

        73 de Chuck, WS1L


        --


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


        -- 
        161, Joe, Ronnie(Rowena), Marty & Sidney Pontek
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      • Donnie
        Chuck: You are going to get lots of suggestions however I once had a similar issue and I finally traced it to a bad connection at the silver contact to the
        Message 3 of 5 , Jun 26, 2012
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          Chuck:
          You are going to get lots of suggestions however I once had a similar issue and I finally traced it to a bad connection at the silver contact to the adjustment screw. Try turning the actual contact to see if it's loose on the dit contact screw. Also make sure all the vertical round posts are tight by checking the screws from underneath. Sometimes the old fiber washers begin to deteriorate.

          Donnie

          On Jun 26, 2012 8:46 PM, "Chuck Chandler" <chandlerusm@...> wrote:
           

          I picked up a recent-vintage Blue Racer at the Slidell, LA hamfest last year and have been using it for a while... it's my third bug, after a 1969 standard and a 1957 Lightning.  This one seems *VERY* touchy on the dits - there is a tendency to not hold the same adjustment even for a single QSO.


          I can adjust the dits to the point where I can get the points to barely close at rest - it will give dozens and dozens of dits before getting scratchy - and will sound fine - and then the next QSO it will start sending scratchy sounding dits.

          I have placed a .01 uf cap across the key line (inside the plug housing) on all 3 of my bugs, and it seems to help the other two on modern rigs.

          This one has me baffled.

          The pendulum arm, at rest, is barely touching the damper.  

          Any other suggestions would be appreciated!

          73 de Chuck, WS1L


          --


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

        • D.J.J. Ring, Jr.
          Recent vintage blue based Blue Racer 2000 bugs (not a real Blue Racer) are an Original model on a narrow base. Despite the painted bottom, it is a Deluxe
          Message 4 of 5 , Jun 27, 2012
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            Recent vintage blue based Blue Racer 2000 bugs (not a real Blue Racer) are an Original model on a narrow base.  Despite the painted bottom, it is a Deluxe model key with synthetic ruby bearings which do not conduct electricity.  A good key but with some problems.

            Vibroplex modified the way it grounded the Deluxe keys.  They removed the grounding braid and two small machine screws which attached the braid to the main lever and to the base of the key.  Now the ONLY connection is the dot tension spring.  Make sure you have sufficient tension on the spring to avoid loss of continuity.

            Also make sure it's clean.

            I wrote some instructions for cleaning and using bugs here:
            http://www.qsl.net/n1ea/bug_adjusting_cleaning_sending.txt

            73
            Gopher Hole:  gopher://sdf.org/1/users/djringjr/ (native or with Firefox's Overbite extension) or via http to gopher gateway
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