[Elecraft] [K2] AUXBUS and 3rd party mods

[Don Wilhelm]

  Byron,

The AUXBUS protocol is Elecraft proprietary, so you would have to do a 
lot of reverse engineering and experimenting to do what you are 
contemplating.
As an alternative, most of the information is available on the RS-232 
TXD and RXD lines, but that implies that the RS-232 device on the other 
end has enough intelligence to operate as an RS-232 DCE.

73,
Don W3FPR

On 4/4/2011 6:39 PM, Byron Servies wrote:
> In between sessions of slowly continue with my K2 build, I have been
> looking at some of the available mods / options boards and reading the
> manual. Naturally, this has led to some questions.
>
> My K1 has a K6XX CW tuning indicator, and I'm considering one of those
> for the K2, and I know I will be using some digital modes so Don
> W3FPR's audio line out mod may be on the list. I used a K3 + P3 for
> the first time during WPX SSB recently, and that amazing combination
> has me considering the Z1000B options from Clifton Labs to interface
> with a pan adapter.
>
> However, one of the things I plan on doing with my K2 is taking it in
> to the field, and the manual's discussion of options for saving power
> look like they will be really handy, but somewhat incompatible with
> the idea of the above options.  Further reading however, seems to
> indicate that the AUXBUS sends all of the necessary information out on
> mode change, band change, etc.
>
> Is enough known about the AUXBUS protocol to code up new PICs that
> would monitor for different changes and selectively turn on or off
> these option boards as is done for the official Elecraft boards?
>
> For example, if the mode is SSB or POWER is BATT, then the CW tuning
> indicator could be turned off.  The line out module could look for the
> RTTY filters to be activated (thus assuming that means a digital
> mode).
>