Groundboard
 
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Ground board bottom           Ground board terminal panel
Adjustable legs, dual terminal panel and hollow center pivot   Terminal panel:  Auxiliary (L), RS232 (M) and 12VDC (R) Note teflon covered adjustable legs
     
Ground board pivot bolt   Ground board pivot bolt lower
Bottom view 2' OD Center Pivot   Inside GB view of pivot bolt
     
Ground board bearing race            Ground board inside
Rocker box bottom view of bearing race and Formica laminate brake bearing surface   Groundboard top view of azimuth 1 1/2" OD
ball bearings.  Teflon pieces are the brake assembly.  Note inner and outer applications of felt material near the edge to seal GB cavity
     
Ground board bearing top view   Ground board bearing mount
Top view of azimuth support bearing. 
Note felt sealing material near bearing		   Bottom view of azimuth bearing
with metal retainers.
     
Leg inside view of bearing cavity

 

Leg inside view of bearing cavity
 
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