[Elecraft] Mic problem

[Don Wilhelm]

What type of Heil Proset is it?

If it is either the Heil Proset Ic or the Elecraft Proset K2/3, then you 
need to turn bias on because it has an electret element.

If it has a dynamic element (often marked with an HC4 or HC5 
designation), then no bias is required (and should not be turned on).

As you can see from the above, there are many types of Heil Prosets, and 
we would have to know the full microphone designation to make any 
certain statements.

73,
Don W3FPR

On 11/26/2011 4:35 PM, Jack Berry wrote:
> I have a Pro-Set mic that came with the purchase of a used K3, s/n #3012 for
> reference.  The mic seems to be nearly dead and I wanted to make sure that I am
> not  doing something wrong before sending it to Heil for testing and repair.
>
> Even with the gain full up and the mic right next to my mouth I can't  move the
> ALC but do hear my voice in the head set with monitor volume up  full. I have
> tried it through both the front and rear mic sockets and  another Heil mic works
> fine with the radio.
>
>