MIC + Line-In Feedback Noise

[Bud Governale, W3LL]

Thanks to both Eric K3NA and Rich VE3KI, I now have Line-In working.

That leads to a new related issue:

When MIC + LIN is turned ON I get feedback from somewhere when I key with the foot switch in SSB without saying
anything.
If I turn MIC + LIN to OFF the feedback is gone.
I closed N1MM just to be sure it wasn't causing a problem. It wasn't, the feedback was still there.

Any suggestions?

73,

Bud W3LL
[hidden email]


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[KK7P]

> When MIC + LIN is turned ON I get feedback from somewhere when I key with the foot switch in SSB without saying
> anything.
> If I turn MIC + LIN to OFF the feedback is gone.

I am not sure why you have MIC+LIN turned ON, but I suspect you are
getting noise pickup from the microphone.  Perhaps you have MON turned
up to hear the outgoing signal and the microphone is near the speaker so
you get a feedback loop.

73,

Lyle KK7P
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[Joe Subich, W4TV-4]

Bud,

Depending on your soundcard you should be able to turn
off the "monitoring" so you don't need to change the  
Line In level.  For example, with the SoundBlaster
Audigy 2ZS, open the "Recording Control" (input mixer),
click the "Advanced" button on the Analog Mix input and
select "Record without Monitoring."  Some Realtek chips
include the inputs on the output (speaker) mixer but
they are generally hidden (select Options | Properties
and show all of the unchecked controls).  You can unhide
them and make sure the Line In (it may be shown as a
"color") is muted.

73,

   ... Joe, W4TV
 

> -----Original Message-----
> From: Bud Governale, W3LL [mailto:[hidden email]]
> Sent: Friday, March 06, 2009 8:48 AM
> To: [hidden email]
> Subject: Re: [Elecraft] MIC + Line-In Feedback Noise
>
>
> Hi Joe,
>
> Thanks for the reply.
>
> I discovered late last night that it was caused by the
> soundcard Line-In slider position.
>
> At first I tried muting Line-In. However, I soon discovered
> that N1MM would remove the Line-In mute checkbox each time
> it played a function key Wave file. The only solution is to
> slide the Line-In slider to the bottom (zero) and forget
> about the mute checkbox.
>
> Now I need to remember that when going from SSB to RTTY to
> raise the Line-In slider position.
>
> 73,
>
> Bud W3LL
> [hidden email]
>
>
>
> ----- Original Message -----
> From: "Joe Subich, W4TV" <[hidden email]>
> To: "'Bud Governale, W3LL'" <[hidden email]>
> Sent: Thursday, March 05, 2009 10:19 PM
> Subject: RE: [Elecraft] MIC + Line-In Feedback Noise
>
>
>
> If you have a soundcard connected to the K3, it is probable
> that "Monitor" is enabled on soundcard Line In which echoes
> the K3 Line Out back to the K3 Line In.  If you have monitor
> turned on in the K3 it creates a nice echo chamber.
>
> 73,
>
>    ... Joe, W4TV
>
>
>
> > -----Original Message-----
> > From: [hidden email]
> > [mailto:[hidden email]] On Behalf Of Bud
> Governale,
> > W3LL
> > Sent: Thursday, March 05, 2009 8:26 PM
> > To: [hidden email]
> > Subject: [Elecraft] MIC + Line-In Feedback Noise
> >
> >
> > Thanks to both Eric K3NA and Rich VE3KI, I now have Line-In working.
> >
> > That leads to a new related issue:
> >
> > When MIC + LIN is turned ON I get feedback from somewhere
> when I key
> > with the foot switch in SSB without saying anything.
> > If I turn MIC + LIN to OFF the feedback is gone.
> > I closed N1MM just to be sure it wasn't causing a problem. It
> > wasn't, the feedback was still there.
> >
> > Any suggestions?
> >
> > 73,
> >
> > Bud W3LL
> > [hidden email]
> >
> >
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
>
>
>

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