[Elecraft] Yamaha CM500 Headset

[Dennis Moore]

Don't use the accessory battery box, not needed. Set bias on in the K3 
and go for it.

73, Dennis NJ6G

On 2/16/2012 11:46 AM, orthodoxhome at cox.net wrote:
> 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?