[Elecraft] What's best Soundcard Interface for KX3

[Don Wilhelm]

George,

You are making progress, receive is good - only a little more to go to 
handle the transmit situation.

The cause is because the ring contact on the microphone jack is PTT, and 
the unused channel (right) of the soundcard has a sufficiently low 
impedance (resistance) to trigger the PTT.  If you are set up to use 
VOX, you do not need PTT.

There are 2 solutions (I think the 2nd one is the best, but that is just 
my opinion):
1.) Enter the menu and set MIC BTN to OFF.
Since that requires you to turn MIC BTN to ON when going back to SSB 
with the MH3 microphone, I suggest #2.
2.) Build an adapter which has no connection to the 1st ring on the 
microphone plug.  In other words, connect the soundcard stereo plug to 
only the shell and tip of another jack and use that adapter between your 
soundcard audio out cable and the KX3 microphone jack. If you want to 
use PTT, you can bring out the ring contact to operate from whatever 
source you are deriving the PTT signal.

73,
Don W3FPR

On 4/10/2016 6:18 PM, George_yv5wz wrote:
> Thanks Don
>
> I tried with my Laptop Soundcard and it decodes signal even -24
> So  I guess sound card its ok.....but  when I connect Mic jack to my pc
> output (phones) .....it keys my KX3 (TX red led on)......I dont get it!!
>
>
>
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