[R-390] Bristol set screws

[Chris Kepus]

Thanks to those who responded to my inquiry.  

OK...Here's what I got out of the responses:

Stick with the Bristol set screws primarily because *IF* the correct size
Bristol wrench is used, the amount of torque that can exerted without
damaging (or ruining) the set screw socket is likely to be higher than with
allen sockets /wrenches.  

Whew!  I am surprised that it would take that much torque to tighten set
screws so the knobs wouldn't slip when turning them.  No wonder about the
tales of anquish from those who are unable to remove a knob or shaft
connector due to the galling on the shaft caused by too much torque !!??  I
haven't dug deep enough into my 390A yet to experience a switch or control
knob that needs a lot of torque to twist. 

Thanks es 73,
Chris
W7JPG