Yeah, that’s where I am now. The Air, conveniently, doesn’t have a mic jack, 
but I do have a lovely interface I certainly think is good quality I picked up 
a while ago for music production.

Thanks all.
-Amy


> On Jun 23, 2015, at 6:53 PM, Fred Jensen <k6...@foothill.net> wrote:
> 
> Amy,
> 
> Why don't you try 2 stereo cables between your laptop and KX3, all audio.  
> I'd suggest Radio Shack except RS es mort.  Others have suggested ditching 
> the SL, it isn't much of a sound card and does have some RFI problems, so 
> start simple.  You can decide about the SL later.
> 
> Two RS stereo cables have been my digi interface, always has, works great, 
> lasts a long time.  It's probably not the absolute best, but it works.
> 
> 73,
> 
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
> - www.cqp.org
> 
> On 6/23/2015 6:36 PM, Amy Wilhelm wrote:
>> Having performed further science, here’s what I’ve got:
>> 
>> 1. When the Signalink is connected to my laptop but not the KX3, nothing 
>> special.
>> 2. When the Signalink is connected to my KX3 (mic jack so I could monitor 
>> the receive audio), broadband noise.
>> 2a. in this instance, noise is quieted by placing my hand on or near the 
>> Signalink.
>> 3. When the Signalink is connected to my laptop but not the KX3 *and* the 
>> KX3USB is connected to my KX3, broadband noise.
>> 3a. in this instance, noise is louder when I put my hand on or near the 
>> Signalink.
>> 4. When the Signalink is connected to my laptop and the KX3 and the KX3USB 
>> cable is connected to my KX3, a very small amount of (equally broadband) 
>> noise.
>> 
>> This seems distinctly ungood if a little messing with capacitance causes 
>> that.
>> 
>> All of these seem to be radiated either by the Signalink itself or by a 
>> cable connected to it - ‘course, that could include the USB cables and the 
>> laptop as well. Whenever I turned the null on my antenna towards their 
>> general direction, the noise got quieter (but was still strong enough to be 
>> bothersome).
>> 
>> Gonna try those mods as soon as my order from Mouser gets here. Crossing my 
>> fingers it’s by Field Day.
>> 
>> 73
>> Amy
>> K3ISI
>> 
>>> On Jun 23, 2015, at 5:45 PM, Amy Wilhelm <netcrushe...@gmail.com> wrote:
>>> 
>>> Yeah, fldigi doesn't seem to know what to do with I/Q. Yet.
>>> 
>>> CAT control isn't strictly necessary. But it's nice to have with fldigi, 
>>> WSJT, and various logging software.
>>> 
>>> 73
>>> Amy
>>> K3ISI (granted today)
>>> 
>>> Sent from infinite squirrels at infinite keyboards
>>> 
>>>> On Jun 23, 2015, at 5:18 PM, k3...@comcast.net wrote:
>>>> 
>>>> Guys,
>>>> Two things. First, you can't use the I&Q data on the KX3 to transmit and 
>>>> I'm not really sure you can use it with FLDIGI; I believe FLDIGI only 
>>>> expects audio. And second, I'm not sure why you need to use ACC1. The only 
>>>> connections you should need to use is to the KX3 mic and the USB connector 
>>>> for the SignaLink. The SignaLink will key the radio with out needing other 
>>>> connections. This may help some of the noise problem.
>>>> 
>>>> 73,
>>>> Barry
>>>> K3NDM
>>>> 
>>>> ----- Original Message -----
>>>> 
>>>> From: "bs usb" <bs...@k5dkz.com>
>>>> To: "elecraft" <elecraft@mailman.qth.net>
>>>> Sent: Tuesday, June 23, 2015 5:01:45 PM
>>>> Subject: Re: [Elecraft] KX3 + SignaLink USB noise problems
>>>> 
>>>> With the I/Q output from the KX3 and fldigi software on the Mac why do
>>>> you even fool with signal-link?
>>>> 
>>>> Amy Wilhelm wrote:
>>>>> Yes, it's another post about that little interface we all love to hate...
>>>>> 
>>>>> I went through archives and didn't find anything that *quite* matched
>>>>> this, so I wanted to know if anyone's experienced it or has tips.
>>>>> 
>>>>> Aside from the widely reported high noise floor (it *seems* to be
>>>>> possible to just crank the RX volume to get past that a little) I have
>>>>> a couple of symptoms that are...strange at best:
>>>>> 
>>>>> 1. If I have the KX3 connected to my laptop via the KX3USB cable to
>>>>> ACC1, and then attach the Signalink to a different USB port, I
>>>>> immediately experience broadband noise. Changing the IF doesn't seem
>>>>> to help this, and I seem to be tuning past peaks of noise all across
>>>>> the band. If I detach the Signalink, most of these symptoms go away (I
>>>>> think some of the peaks are just out there).
>>>>> 
>>>>> 2. The Signalink seems to be radiating a significant amount of QRM -
>>>>> or the cables connected to it (but not necessarily to the KX3) are.
>>>>> Because I use an Alexloop, my antenna is always right next to my
>>>>> laptop, interface, radio, all that fun noisy stuff. Conveniently
>>>>> magloops have this great null directly perpendicular, so I've worked
>>>>> out that turning my antenna perpendicular to the Signalink - not
>>>>> necessarily my laptop or radio - reduces the noise floor significantly
>>>>> (both wideband noise and weird little blips every 150 Hz or so). I'm
>>>>> not actually sure at the moment whether I've checked if unplugging my
>>>>> Signalink makes a big difference, but evidence would suggest I should
>>>>> try that.
>>>>> 
>>>>> This is all with the KX3 operating off of a gel cell (so no QRM
>>>>> there), the Signalink with the official KX3 snap-in jumper board and
>>>>> cables, a Macbook Air running from its internal battery, an Alexloop,
>>>>> and the included KX3USB cable.
>>>>> 
>>>>> Any help would be much appreciated - I've seen the page suggesting
>>>>> some mods to the Signalink and I'm more than willing to do those if
>>>>> those would help with the symptoms I've been seeing here, but wanted
>>>>> to check if anyone thought that was reasonable (and that my diagnosis
>>>>> is) first.
>>>>> 
>>>>> 73
>>>>> Amy Wilhelm
>>>>> WN5FIZ
>>>>> ______________________________________________________________
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> 
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