Re: K2: connecting a condenser mic

Posted by Jim Brown-10 on Jan 29, 2010; 5:29pm
URL: http://elecraft.85.s1.nabble.com/K2-connecting-a-condenser-mic-tp4480033p4481263.html

On Fri, 29 Jan 2010 08:49:43 -0500, Brian Machesney wrote:

>I have a condenser mic

If it's like most 2-wire mics, you want a series resistor between V+
and the "hot" terminal of the mic. It serves as the load resistor
for the output stage of the mic, and also limits current to that
output stage to a safe value. If I knew nothing about the mic, a
value on the order of 4.7K - 5.6K would be a good starting point.
The mfr is giving you lower values. If you use NO resistor, the V+
shorts out the audio.

73,

Jim K9YC



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