[Elecraft] K3: Added protection for RS-232 port

[Don Wilhelm]

Pete,

The only possible reason I can think of for people to say that is that 
sometimes the MOVs can damage themselves in the event of a surge.
They become sacrificial devices - if they fail, replace them.
Yes, MOVs should be always be enclosed, so should they explode when they 
fail, bits do not go flying just anywhere.

73,
Don W3FPR

Pete Smith wrote:
> Yet other knowledgeable people say that using MOVs in this way is apt to 
> *cause* damage.  I realize that this discussion should probably move to 
> Towertalk now, but don't want these questions to go unraised, and we 
> have a bunch of the right people here.
>
> 73, Pete N4ZR
>
>