[R-390] Oldham Coupler Maintenance

[Flowertime01 at wmconnect.com]

Fellows,

If you stretch the spring on the oldham coupler while spinning the KC knob 
and thus change the relation of the rotation angle between the KC knob and cam 
shafts to the VFO position shaft then you have back lash.

Too much friction causes the lash problem and maintenance fixes the lash 
problem.
Sorry to make this look like a binding problem.

Sorry the fix to a lash problem is cleaning and lubrication.

Read Tim's tales of the stuff he has encountered.

Backlash in gear trains is also a friction problem.
It the gears have low friction then they are just sloppy and have play but 
not suffering from back lash.

Roger.
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