[Elecraft] K3: No sound card interface required?

[J. Edward (Ed) Muns]

> Since the K3 has an isolated sound card interface, this will
> *completely* replace the interface I currently use to run 
> digital from my PC to an HF rig?

For AFSK, all you need are two standard 1/8" phone plug audio cables running
from the K3 LINE IN and OUT jacks to the PC sound card LINE OUT and IN jacks
respectively.  Audio isolation transformers are built-in the K3 for both
lines.  This assumes your RTTY encoder/decoder is in software on the PC,
e.g., MMTTY, etc.  If you use a hardware TNC like a Hal DXP38, then of
course you need to run cables to it.

For FSK, of course, you still need a keying line from a PC COM port to the
K3 FSK key line input.

73,
Ed - W0YK