[Elecraft] K3 / SLUSB / CocoaModem

[Mike Reublin]

An iMic will give you separate in/out audio jacks.

73, Mike NF4L

On Dec 12, 2012, at 2:10 AM, Bill Frantz <frantz at pwpconsult.com> wrote:

> On 12/11/12 at 9:14 PM, k6limaecho at gmail.com (Rick Prather) wrote:
> 
>> Not sure why you feel the need for the SL [SignaLink] with your K3 but that's up to you.
> 
> The MacBook Air has only a single audio port. The Apple web site is a bit light on technical information (no surprise there), but it says the MacBook Air includes:
> 
>  Headphone port
>  Support for Apple iPhone headset with remote and microphone
> 
> If indeed it will take a 4 conductor plug (with a tip, 2 rings, and a sleeve), then it may be possible to skip the SignaLink by wiring a plug correctly. A friend who has done so for connecting a iPhone to a wired phone system says that the resistance value of the microphone connection is what is used to determine whether the plug is a 3 conductor stereo plug or a 4 conductor stereo + microphone plug.
> 
> In any case, having the SignaLink lets you use the cocoaModem "monitor" feature to listen to the incoming signal. Not a great advantage with the K3 since you can just turn up the audio volume on the K3, but sometimes useful to hear what the computer hears.
> 
> Cheers - Bill, AE6JV
> 
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