K2 and PSK

[Jim AB3CV]

I'm considering adding KSB2 to do some PSK. The $99 price seems very good to
add an allband capability rather than something like a Warbler.

Is there any reason to get a KDSP2 for PSK purposes rather than the KAF2
which I already have?

No microphone in my plans...

73

jim ab3cv

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Julian, G4ILO]

Jim Miller-9 wrote

I'm considering adding KSB2 to do some PSK. The $99 price seems very good to
add an allband capability rather than something like a Warbler.

Is there any reason to get a KDSP2 for PSK purposes rather than the KAF2
which I already have?

None whatsoever. The fewer stages the off-air signal passes through before it gets to the sound card the better.

[Curt Milton]

Jim

PSK is an enjoyable change of pace, and an effective
mode for low power/modest antenna operation.  It is a
great conversational mode (and to boot one can listen
to music while having QSO's!).  

Since processing is done in the PC, you generally want
to give the PC the full audio passband - meaning you
use your widest filter to see as much spectrum as
possible on the waterfall screen.  So you will use the
wide SSB filter that comes on the KSB2 and bypass the
audio filtering.  

Frequency diversity is a good thing for PSK as well -
the last few days there has been PSK activity on 20,
30, 40 and 80m.  

Hint -- there is an app note on the Elecraft site for
wiring up your own PSK interface.  

73, Curt

--- Jim Miller <[hidden email]> wrote:

> I'm considering adding KSB2 to do some PSK. The $99
> price seems very good to
> add an allband capability rather than something like
> a Warbler.
>
> Is there any reason to get a KDSP2 for PSK purposes
> rather than the KAF2
> which I already have?
>
> No microphone in my plans...
>
> 73
>
> jim ab3cv
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft   
>
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

      ____________________________________________________________________________________
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ 

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[rkayakr]

Jim

>Is there any reason to get a KDSP2 for PSK purposes rather than the KAF2
>which I already have?

The digital software does it's own signal processing. I don't have the KDSP2 in my K2.

You can define a set of crystal filters for digital modes. I defined mine around 1500 Hz. Software like PSK Deluxe and DM780  let you define a center frequency (like 1500 Hz) and center the PSK signal with a mouse click. For RTTY I use MMTTY with mark/space centered around 1500 (1435/1565).

     Bob
       KD8CGH


_______________________________________________
Elecraft mailing list
Post to: [e-mail]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com