[Elecraft] K3 Firmware upload

[Lyle Johnson]

> Will the K3 version changes support retrograde installation ( I would  
> imagine that is supported by a clean refresh ) will version  .x3  automatically 
> include version .x2 if you are currently running .x1? 

The K3 is not a general purpose computer, so it doesn't have all sorts 
of DLLs, OS service packs, and other frustrating dependencies.  The MCU 
code, which runs the radio, is a single block of code, complete in itself.

Similarly, the DSP code is a single block of code, complete in itself.

All you need to do, if you do not want to use the current version, is 
ensure that the DSP and MCU code you choose to load are compatible with 
each other.  You probably would not want to run this year's DSP with a 
two year old MCU load, for example... or maybe you would? :-)

Lyle