[Elecraft] K2 Mic Configuration

[Steve & Anne Ray]

K2 mic configuration.   I use computer jumpers for the mic headers (get them
at Radio Shack), you don't need the  resistor in the 5V on the mic header
unless you are using a electrodynamic mic, like a computer mic.  I normally
leave the 5V line unjumpered.   I have some old computer boards, so I found
a 1K surface mount resistor on one of the old boards, took a jumper and used
my Dremel tool to cut away the short, then soldered the 1K surface mount
resistor to the jumper.   I then checked to make sure I had the 1K
resistance across the jumper.   This was how I got a resistor for the
jumper, for use with a electrodynamic mic.  All the other pins are jumpered
across, with unmodified jumpers (direct shorts).  Realize I created the
jumper with the resistor to bias the 5V line for experimentation when I was
trying various mics.   I now only use my HC5 element in an old Kenwood MC50
Mic.   There is no need for a bias resistor with the standard Heil Mics.
Heil does make a mic for Icom rigs which requires a bias resistor.