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Deluxe Vibroplex bearing conductivity

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  • Jack B.
    A question for the experts Just for grins, I checked the bearing conductivity of my new Vibroplex Original Gold bug (deluxe bearings) with a Fluke multimeter.
    Message 1 of 3 , Sep 12, 2008
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      A question for the experts

      Just for grins, I checked the bearing conductivity of my new Vibroplex
      Original Gold bug (deluxe bearings) with a Fluke multimeter. After
      insulating the dot coil spring, lever stop screw, damper, etc., I
      found there is no short between the frame and lever.

      To compare, I did the same test with my Anniversary Original (standard
      bearings) and of course it was a dead short.

      This confirms what I have read about the "jeweled" bearings -- they
      don't conduct by themselves. The bug appears to get the most constant
      conductivity through the dot coil spring. The lever stop screw and
      damper also conduct, but only during dashes.

      My dad has a 1949 Deluxe with a copper braid running from the frame to
      the lever. I suspect the braid was necessary for the old
      transmitters, but with newer gear the dot coil spring suffices by
      itself. Is this the case?

      Thanks,

      Jack - N0NV
    • David Ring
      Jack, The pre-Maine deluxe bugs had little screws on the lever which attached to the frame with braid. Peter Garsoe - the owner at that time - simplified the
      Message 2 of 3 , Sep 12, 2008
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        Jack,

        The pre-Maine deluxe bugs had little screws on the lever which
        attached to the frame with braid. Peter Garsoe - the owner at that
        time - simplified the construction of the key. He took away the
        drilling, tapping, screws and braid, took away the drilling and
        tapping and screw in the little machine screw that held the trunnion
        pin at an certain height. He did other things too! I guess he
        discontinued the Vibroplex Champion, Lightning Bug and Presentation as
        well. He went down to just one model the Original - now available in
        three finishes, paint, chrome or gold.

        I've never measured the newer bearings - but if they don't conduct,
        when all metal is not touching the lever, then the source of the
        conductance is the dot spring.

        So make sure you dot spring is clean and conducts!

        73

        DR
        On Fri, Sep 12, 2008 at 3:36 PM, Jack B. <nzeronv@...> wrote:
        >
        > A question for the experts
        >
        > Just for grins, I checked the bearing conductivity of my new Vibroplex
        > Original Gold bug (deluxe bearings) with a Fluke multimeter. After
        > insulating the dot coil spring, lever stop screw, damper, etc., I
        > found there is no short between the frame and lever.
        >
        > To compare, I did the same test with my Anniversary Original (standard
        > bearings) and of course it was a dead short.
        >
        > This confirms what I have read about the "jeweled" bearings -- they
        > don't conduct by themselves. The bug appears to get the most constant
        > conductivity through the dot coil spring. The lever stop screw and
        > damper also conduct, but only during dashes.
        >
        > My dad has a 1949 Deluxe with a copper braid running from the frame to
        > the lever. I suspect the braid was necessary for the old
        > transmitters, but with newer gear the dot coil spring suffices by
        > itself. Is this the case?
        >
        > Thanks,
        >
        > Jack - N0NV
        >
        >
        >
        >
        > ------------------------------------
        >
        > Yahoo! Groups Links
        >
        >
        >
        >
      • John Snell / G0RDO
        Yes - you re spot on there ( or should I say dot on ). Cheerio from John Snell. / G0RDO www.morsemad.com
        Message 3 of 3 , Sep 13, 2008
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          Yes - you're spot on there ( or should I say dot on ).
          Cheerio from John Snell. / G0RDO
          www.morsemad.com
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