[WriteLog] psk-31

[Bob Crossland]

Hello all,

First, thanks goes to all of you that responded to my inquiry.  What a smart
bunch of folks.  Every person that responded, and there were a number of you,
hit the nail right on the head.  You sometimes scare me. hi

Anyway, I'll be firing up the soldering iron tomorrow (another scarry thought)
and will wire up my sound card output into the phone jack input of my ts-940
using the suggested audio isolation transformer.  Hopefull my phone jack input
is vox sensitive.  If not then into the mic jack we go.

With any luck the wife and dog will still be my friends after this endeavor and
I'll run into one of you on 20 or 40 meters calling cq on psk31.

Take care all

Bob, N3IXR

Don Hill wrote:

> Hi Bob and others that might be interested,
>
> PSK31 is normally run on LSB and is AFSK only.  You must feed
> audio from your sound board to either your mic input or packet input
> on the radio for transmit.  It sounds like your receive is fine.
>
> If you are using FSK for RTTY, then you are probably running the FSK
> from a com port to the FSK input of the radio.   But for PSK31 you must
> feed audio to the radio from either the speaker output or aux. output of
> the sound card.
>
> I'm no expert on PSK31 but in the last two weeks I've spent every night
> on this fabulous new mode (worked 7X2BK as my 3rd ever PSK contact
> on 40M no less).
>
> Here, I am feeding audio out of my aux. jack to the mic input of my TS870.
> However you can use the speaker output of the sound board if you don't
> have an aux. jack.  In any case, this audio is most likely way too high in
> level for the mic input.  It's best to run this audio thru an isolation
> transformer
> and attenuate it before feeding it to the radio.  On my SoundBlaster 16
> PCI card, I have to set the output to it's lowest level
> and also use a 50k ohm pot in line.  The trick on PSK31
> is to show zero on your ALC meter while you transmit.  You may not be
> able to get full power output out of your 940, but believe me, you won't
> need it.
>
> Since you are keying the radio, that's a good start, you are half way there.
> Good luck and hope this helps.
>
> 73, Don AA5AU
>
> ----- Original Message -----
> From: Bob Crossland <bcross@bellatlantic.net>
> To: <writelog@contesting.com>
> Sent: Thursday, February 03, 2000 9:50 PM
> Subject: [WriteLog] psk-31
>
> >
> > Need a bit of help folks.
> >
> > I'm trying to get psk31 running.  I'm receiving fine but when I go to
> > transmit mode, the rig keys but no audio and no power out.
> >
> > RTTY is working fine, rcv and xmit (using FSK).
> >
> > I'm using a Kenwood TS-940, soundcard, etc.  I have a feeling I'm way
> > off base in thinking if rtty works then psk31 should work also using the
> > same cabling(?)
> >
> > Do I need another audio line of some type since I'm using psk31 in USB?
> >
> > I obviously need a little guidance.
> >
> > Thanks
> >
> > Bob, N3IXR
> >
> >
> > --
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> >
> >


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