[Elecraft] K3s rear mic connector and shure SM58.

[Fred Jensen]

Electret mics, and capacitor and carbon mics, neither of which are real 
common in hamdom these days, require a bias voltage in the 5-8 V range.  
A K3 will provide that bias if it's turned on in the MIC menus.  Dynamic 
mics do not require nor like bias.  Without bias, an electret mic will 
produce no output. I believe the Shure mic in this thread is a dynamic mic.

Carbon mic elements from old black telephones would run nicely on 1.5 V 
from a D-size dry cell although the telephone generally ran on 48 V from 
the central office.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 10/6/2017 4:27 PM, Richard Day wrote:
> Why did you turn the mic bias off?  Have you tried turning it on to see if
> it gives you the sound you need?
>
> Rich
> KK4DZE
>