[Elecraft] MIC + Line-In Feedback Noise

[Joe Subich, W4TV]

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:w3ll at arrl.net] 
> Sent: Friday, March 06, 2009 8:48 AM
> To: lists at subich.com
> 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
> w3ll at arrl.net
> 
> 
> 
> ----- Original Message ----- 
> From: "Joe Subich, W4TV" <lists at subich.com>
> To: "'Bud Governale, W3LL'" <w3ll at arrl.net>
> 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: elecraft-bounces at mailman.qth.net 
> > [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Bud 
> Governale, 
> > W3LL
> > Sent: Thursday, March 05, 2009 8:26 PM
> > To: elecraft at mailman.qth.net
> > 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
> > w3ll at arrl.net
> >
> >
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>