[Elecraft] KX3 and Rocky 3.7

[Matt Maguire]

I think he means this one:
http://us.store.creative.com/Creative-Sound-Blaster-XFi-Surround-5.1/M/B0044DEDCA.htm

As Don mentioned, you can add in some decoupling capacitors to make it a
bit quieter (after all, it is powered by the noisy USB).

73, Matt VK2RQ


On Tue, Jun 25, 2013 at 12:49 PM, Kenneth A Christiansen <w0cz at i29.net>wrote:

> Thanks Don for your help.
>
> I still need someone to give me a model number for a USB Sound Card that
> will work as I only want to do this once. I have been on the internet but
> none of the sound cards tell me if the mic input is stereo. The Creative
> X-Fi was too generic for me to tell which model to buy so if I had the rest
> of the model information that still might be the answer.
>
> 73 and thanks for any information.
>
> Ken W0CZ   w0cz at i29.net
>
> Sent from my iPad
>
> On Jun 24, 2013, at 9:24 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
>
> > Ken,
> >
> > Since the KX3 I/Q bandwidth is limited to something like 48kHz, you do
> not need an exotic soundcard which will give you a 192 kHz span, most
> external soundcards will do the job just fine.
> >
> > The Creative X-Fi soundcard is available at a modest price, and will do
> a 192 kHz span should you need it, but there may be other less costly
> options that I am not aware of.  The X-Fi can be modified with a couple of
> added capacitors to reduce the noise level - Google for the mod information.
> >
> > The biggest consideration for use with the KX3 RX I/Q output is the
> noise level rather than the bandwidth of the soundcard.
> >
> > 73,
> > Don W3FPR
> >
> > On 6/24/2013 10:11 PM, Kenneth A Christiansen wrote:
> >> Hi Don
> >>
> >> You answered and confirmed my suspicion. I suspect since I have a new
> Elecraft cable and the sound card only has the MIKE input that it is MONO.
> Do you know of a USB sound card that you will work? I would rather by
> something good that I know will work than spend money on something cheap
> that may not. I have got my use out of this sound card on digital ham
> programs.
> >>
> >> Sent from my iPad
> >>
> >> On Jun 24, 2013, at 8:51 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
> >>
> >>> Ken,
> >>>
> >>> Are you getting a signal to the soundcard from both the I and Q
> channels?  What you are seeing is normal of only one channel is fed to the
> soundcard.
> >>>
> >>> In other words, check your cables.  Plug in the left channel only into
> the soundcard and see if you have a signal present, then do the same with
> the right channel.
> >>>
> >>> It may be a cabling problem, or your sound adapter may have only mono
> input.  Many external soundcards have mono input when the mic input is
> selected, but may (or may not) when the Line In is selected - I/Q decoding
> requires stereo soundcard input - if the input is mono, you will see
> exactly the condition you report.
> >>>
> >>> 73,
> >>> Don W3FPR
> >
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>