[Elecraft] Tips on setting transmit drive for PSK31

[Joe Subich, W4TV]

> I am also just testing PSK on K3 with Microham keyer using 
> Data A mode and get different results.. Fist think is if you 
> proper adjust level from sound card that ALC meter show 4 
> bars and 5 flickering on 1500Hz means that every time when 
> you change listen channel needs to re-adjust Mic gain to get 
> good ALC level.. 

Do you have the TX EQ set to anything except flat?  

There should be no change in output level with audio frequency 
with any of the microHAM interfaces. 

73, 

   ... Joe, W4TV 
 



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Gordan Hribar
> Sent: Friday, September 04, 2009 4:36 AM
> To: Elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Tips on setting transmit drive for PSK31
> 
> 
> 
> Hello,
>  
> I am also just testing PSK on K3 with Microham keyer using 
> Data A mode and get different results.. Fist think is if you 
> proper adjust level from sound card that ALC meter show 4 
> bars and 5 flickering on 1500Hz means that every time when 
> you change listen channel needs to re-adjust Mic gain to get 
> good ALC level.. So, if you on highest freq. you will 
> overdrive K3 but if you goes little down maybe you can not 
> drive correctly K3 for require power... 
> Please your opinion!
>  
> 73,
> e72x - Gordan
> 
> --- On Fri, 9/4/09, Bob Cunnings <bob.cunnings at gmail.com> wrote:
> 
> 
> From: Bob Cunnings <bob.cunnings at gmail.com>
> Subject: Re: [Elecraft] Tips on setting transmit drive for PSK31
> To: Elecraft at mailman.qth.net
> Date: Friday, September 4, 2009, 6:20 AM
> 
> 
> A while back this was addressed by Lyle in this post:
> 
> http://n2.nabble.com/K3-Transmit-IMD-tp466326p466329.html
> 
> Whether or not it remains current I can't say.
> 
> Bob NW8L
> 
> >
> > I'm curious about your statement that "the K3 will attempt 
> to develop 
> > more power to maintain the power output level you have chosen" -
> >
> > Since PSK is an audio driven mode with a varying amplitude 
> component,  
> > linearity is very important.  What you are suggesting is 
> that the K3 
> > is highly non-linear and has infinite gain, i.e. it puts 
> out X watts 
> > regardless of drive.
> >
> > I know that you don't mean that, so could you clarify?
> >
> > Wes  N7WS
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