[Elecraft] Background Noise with Mike Plugged in to Rear Mike Jack

[Jim Brown]

On 11/21/2021 7:55 PM, Pete Smith N4ZR wrote:
> I don't think RFI is implicated.  I can hear the loud background noise 
> even with the RF turned way down.  This is something else, I believe, 
> perhaps something about the way the gain is distributed, or???

Hi Pete,

I suspect you may be right. When feeding computer audio to the Line 
Input, the Mic Gain knob becomes Line In Gain, but Line In Gain must be 
adjusted with Line In selected, Mic Gain must be selected with Mic, 
selected, then switch to Mic + Line to operate. I suspect one or the 
other of the two may be set too high.

OR -- output from the computer itself may be set too low, so it may have 
been necessary to turn Line up very high, and you're hearing noise from 
the computer's output.

73, Jim K9YC