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

[Pete Smith N4ZR]

Yes, I kind of think you are right, Jim.  I did not know about the 
requirement to set Lin In with Lin In selected, and Mic Gain with Mic 
selected.  I had been doing adjustments in Mic+Lin with the front panel 
Mic Gain only, assuming that in Mic +Lin it controlled both.  Whew - 
good to know it's not something wrong.

73, Pete N4ZR
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On 11/22/2021 12:47 AM, Jim Brown wrote:
> 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
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