[Elecraft] Why US Interface Navigator?

[Lyle Johnson]

> I see folks using the US Interface box along with HRD. What are the
> advantages of using Navigator with HRD over just using HRD alone?

The Navigator is a USB-to-rig interface box (hardware); HRD is control 
and digital mode software.

The computer running HRD has to connect to the radio somehow.

For a K3, you only need a serial cable and two audio cables, assuming 
your computer has a "sound card."  Most (but not all) of what an 
interface such as the Navigator provides is built in to the K3.

Specifically, the Navigator provides a USB interface to the computer, 
and provides the sound card function as well as direct FSK and an 
internal windows-friendly CW keyer.  Other interfaces from microHAM, 
RigExpert, MFJ, SignaLink and so forth provide varying degrees of this 
sort of convenience.

For what it's worth, I just use a serial cable and two audio cables with 
my K3.

73,

Lyle KK7P