[Elecraft] KX3 to computer connection.

[Jim Brown]

Several thoughts. There's a detailed tutorial on setting audio levels 
for digital modes at

http://k9yc.com/USB_Interfaces.pdf

It also includes advice about making suitable attenuators.

I've found adapters on amazon to split a TRRS jack into mic in and line 
out connectors. I seem to recall the brand was Star. They're pretty 
light weight, and I haven't used them (wanted them for the ready box), 
so I have no idea how well they will hold up. But they're cheap enough 
to buy two. :)

Based on my testing, that good, low cost Numark listed is a very good 
unit for our purposes, and can significantly improve decoding as 
compared to internal sound cards.

BTW -- the noise you describe is often caused by failure to bond the 
computer to the radio.

73, Jim K9YC

On Wed,4/5/2017 10:02 AM, Dave B via Elecraft wrote:
> Run the PC's output at a relatively high level, but not into distortion
> (test with headphones, so as to swamp any spurious PC related noises.)