[Elecraft] KX3 I/Q to soundcard isolation

[Giampiero Raschetti]

Do you have this flood of noise in any laptop power condition or only when
operating while battery are charging and no noise when running with battery
power alone ?


On Mon, Oct 15, 2012 at 2:40 PM, Jeff Herr <herr42 at comcast.net> wrote:

> When I connect to my asus laptop I get a flood of noise.....in the radio.
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Giampiero Raschetti
> Sent: Sunday, October 14, 2012 22:02
> To: Barry LaZar
> Cc: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] KX3 I/Q to soundcard isolation
>
> I  do connect KX3 I&Q directly into my MacBookPro stereo in-line without
> any
> additional isolation too and it works great without any problem at all
> running under a parallels desktop virtual machine.
> Is there any special reason to isolate this line ?
>
> 73, iw2esl / Giampiero
>
>
> Sent from my iPad
>
> On Oct 14, 2012, at 11:08 PM, Barry LaZar <k3ndm at comcast.net> wrote:
>
> > Jeff,
> >      I don't know what problem you're having, but I run without any
> > additional isolation with no problem. I go directly from my KX3 I&Q
> > out to my soundcard. Try it and see if you really need to go to the extra
> grief.
> >
> >
> > 73,
> > Barry
> > K3NDM
> >
> > On 10/14/2012 4:43 PM, Jeff Herr wrote:
> >> I need to provide electrical isolation between the I/Q output and my
> >> mic/line input.
> >> Since this is a 2 channel output I need 2 channel (stereo) isolation.
> >>
> >> Is there a commercial product anyone can point out to do this?
> >>
> >> If not then I must choose a couple of audio transformers and wire
> >> them up to do the job.
> >> Would someone care to make a recommendation?
> >>
> >> Here is the DigiKey audio transformer page for easy reference
> >> http://www.digikey.com/product-search/en/transformers/audio/786564
> >>
> >>
> >>
> >> Jeff Herr  WW6L
> >> 4636 Kelton Way
> >> Sacramento,CA 95838
> >> 916.925.6089
> >> herr42 at comcast.net
> >>
> >>
> >>
> >>
> >>
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-- 
Giampiero Raschetti