[Elecraft] Yamaha CM500 Headset

[orthodoxhome at cox.net]

---- k6rb at baymoon.com wrote: 
> sound is better, and the mic works much better. 

I have played with my newly acquired CM500 using the test server on Echolink, and heard a definite background noise - which I think was from the server.  I tried biasing the mic (with the enclosed AAA device), and heard no difference.

When does this electret mic need to be biased?

K5MSG  Mark