[Boatanchors] Backlash in a National capacitor

[LeeCraner at aol.com]

Ian:
 
If you haven't checked out this web article, it will be worth your  while:
 
_http://www.radioblvd.com/National%20HRO.htm_ 
(http://www.radioblvd.com/National%20HRO.htm) 
 
73
Lee WB6SSW
 
 
In a message dated 9/19/2012 4:04:31 P.M. Pacific Daylight Time,  
ianmwilson73 at gmail.com writes:

Lee,  


Very interesting, thank you. I disassembled the mechanism and discovered  a 
large
amount of crud on the worm. Cleaned this up. Reassembled and - beginner's  
luck -
got it back together. However, I must have applied too much preload  
because the
amount of torque required to operate was excessive. Upon second attempt -  
goodbye
beginner's luck - all three of the tension springs decided to disconnect  
themselves;
fortunately only on one end. I will see about reattaching them  tomorrow.


Incidentally, the capacitor rotor shaft doesn't move as freely as I would  
expect.
I imagine this worsens the backlash.


73, ian K3IMW