[Elecraft] APF and audio limiting

[Mike]

Thanks.

Almost every glitch I've had has been a misunderstanding of how things work. Enjoyed 
your other tutorials.

Mike

On 11/6/2010 8:20 PM, The Smiths wrote:
> I think that your understanding of the AGC is probably pretty good.  I also think 
> that most people don't know how to set their AGC properly.  Yes, there should have 
> been SOME control over the loudness of the other signal, but because the Peak 
> filter brings everything up as it does it can also take an S9 signal and make it 
> sound like an S40 over signal too, even when the AGC is compressing things..
>
> Remember, the AGC is only supposed to bring things to the level of your AF output 
> setting.  Therefore if you have your AF all the way up, well, that's as loud as the 
> AGC will put it under Sloping conditions.. It doesn't mean that EVERY weak signal 
> will also be within your AGC Threshold. What "sounds loud" because of the APF is 
> on doesn't mean that it's opening your threshold control in the AGC.  There in lies 
> your problem I think.. What you thought was under AGC control, really wasn't!. What 
> you were actually hearing is proper Dynamic range you should have.  So the volume 
> control still comes into play.
>
> I'll send you a copy of my AGC tutorial offline.  I hope this helps you out some.
>
>
> > Date: Sat, 6 Nov 2010 19:46:11 -0400
> > From: nf4l at nf4l.com
> > To: elecraft at mailman.qth.net
> > Subject: Re: [Elecraft] APF and audio limiting
> >
> > Thanks Tom.
> >
> > Well, I kinda thought it shouldn't blast my ears that hard. Audio *WASN'T* up too
> > loud for the signal I was after. Maybe I don't understand what AGC does. That's 
> why I
> > asked the questions I did.
> >
> > On 11/6/2010 6:21 PM, Amateur Radio Operator N5GE wrote:
> > > On Sat, 06 Nov 2010 18:04:18 -0400, Mike<nf4l at nf4l.com> wrote:
> > >
> > > Sounds normal to me.
> > >
> > > Audio up too loud and APF on, then a strong signal transmits on the frequency
> > > you are listening to....
> > >
> > > What do you think it SHOULD have done? You didn't say.
> > >
> > > Tom
> > > Radio Amateur N5GE
> > >
> > >> On 11/4/2010 9:48 PM, Mike wrote:
> > >>> I'm playing with the new APF, and trying to get a REALLY weak QSO to pop. I 
> have the
> > >>> volume cranked up pretty good, and a REALLY strong station throws in their 
> call. I
> > >>> thought my speakers had blown. Glad I wasn't wearing cans.
> > >>>
> > >>> My CONFIG:AF is 18, AGC = F.
> > >>>
> > >>> Was I doing something wrong? Anybody else experience this? Do we need/can we have
> > >>> better audio limiting?
> > >>>
> > >>> 73, Mike NF4L
> > >
> >
> >
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