[Elecraft] K3 Key Out

[Don Rasmussen]

I soldered up the soft key mod today, it's inexpensive
and simple to install.

http://www.harbachelectronics.com/_mgxftp/pdffiles/SK220PICTORIAL.PDF

[Elecraft] K3 Key Out
David Robertson darjar at comcast.net 
Mon Sep 1 17:40:33 EDT 2008 

The K3 Key out may be rated for 200 volts but if you
use it with an unmodified SB220 you are taking a real
chance of damaging the K3 because there is no
protection diode in the SB220 and the field collapse
voltage can exceed 1000 volts.


the SB220 was originally designed for relay keying.

73
Dave KD1NA