[Boatanchors] Help on drilling out knob setscrew

[LeeCraner at aol.com]

I've got an aluminum knob on an old rcvr with a completely rounded out allen 
head setscrew.  I've attempted to drill out the set screw using high speed 
steel, colbalt and tungsten drill bits, all to no avail.  Seems this setscrew is 
harded steel, harder than any drill bit I can find.

Any ideas on drilling this out, guys?  

Thanks in advance.

73
Lee WB6SSW



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