[Elecraft] K3 #4407 - dead

[Paul Christensen]

If one absolutely insists on branch circuit protection at the AC receptacle, 
MOV shunt mode from line-to-neutral, rather than line-to-ground, is 
generally acceptable.  These are referred to as "single-mode" surge 
protection devices (SPD).  By contrast, most receptacle and power strip SPDs 
utilize the so-called "3-mode" MOV shunting and can produce the disastrous 
results that Joe and K9YC have described.

Paul, W9AC

> Unless you are 100%
> sure that your home/shack is properly wired and bonded, the *ONLY*
> place you should have shunt mode protection is at the service entrance
> (meter) or primary circuit breaker panel (what is known as "whole
> house" protection).