[CW] Vibroplex Champion Question

[Richard Knoppow]

    North-South etc, doesn't mean much here. There three planes: 
fore and aft; side to side; vertical up and down.
    I think the OP meant fore and aft. There is no adjustment for 
this. In the vertical plane the trunions should be adjusted to 
that the height of the contacts is close to centered. On the 
Original and other round pendulum keys, the height of the 
pendulum must be set so that the dot contact on the vibrator can 
be made exactly square with the fixed contact on the post. The 
height should be right so that the damper contact is slightly 
above or below the center of the damper disc, as you point out. 
Sometimes getting the combination right requires changing the 
spacing washers on the fixed dot contact post. The dash contact 
on all models has a considerable range of up and down adjustment 
to match the fixed dash contact. However, if its far off when the 
height is set to make the damper and dot contact correct the 
fixed dash contact post might need a change of shimming washers.
     None of these bugs was precision machinery; there is enough 
slop in the design to compensate for some slop in manufacturing. 
One problem is that with age the thickness of insulating washers 
can change. this can usually be compensated with the metallic 
washers. Probably pix would make this a lot clearer.

On 8/31/2019 12:35 PM, Gary H. Harmon, Jr. wrote:
> Joe, the arm is centered in the north/south axis but not in the 
> east/west axis.  The little bump is hitting near the rear edge of 
> the roller.
> 
> It is working fine but looks funny......not plumb, level, and 
> square.
> 
> I think what I have is a Lightning arm assembly in my Champion bug.
> 
> Life is complicated at times.  lol
> 
> 73,
> 
-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL