[Elecraft] K2 heatsink lock washers

[Chuck Guenther]

The K2 is progressing nicely.  Yesterday, I had quite a bit of time to work on it and installed the internal battery & speaker, the K160RX module, and the KDSP2.  These all checked out fine.  The rework eliminators and instructions were quite helpful in getting these options incorporated.

I especially appreciated not having to remove the heatsink in order to install the 160 meter module.  This raises one question, though.  The instructions for the K160RX say to replace the toothed lockwashers for the PA transistors with split lockwashers provided in the 160 meter kit.  Why is this?  How important is this?  I do plan to replace the lockwashers if and when I remove the heatsink, but I saw no reason to go out of my way to do this.  

73,
Chuck  NI0C
(putting finishing touches on K2 s/n 5853)