[Elecraft] [K2] Mic Configuration

[Steve & Anne Ray]

Checked my notebook, thought I had used a 1K SMD, but I had used a 5K SMD.
The current draw with a short would only be 1mA and the power dissipated
across the 5K SMD would be 5mW.  

 

Earlier I had said.

 

The jumper blocks reminded me of what I did to get the bias voltage out for
the mic.  I took a jumper block carefully cut with my Demel Tool through the
short at the top and sweated soldered a SMD 1K resistor across the
terminals.  It prevents an accident short of the 5V from the mic and if it
is shorted it only draws 5ma with a 25mW draw on the resistor.  A better
choice might be a 10K and that would only draw .5ma and 2.5mW.   However, I
have had no problem with the 1K SMD.  This was done an experiment to try a
cheap computer mic (which worked fine) I went back to my Heil Mic which I
prefer and does not need bias.