[Elecraft] DIY DSP Rev D

[Eric Swartz WA6HHQ - Elecraft]

Hi Brett - I apologize for any confusion on this issue.

The changes on the K3DSP Upgrade are just for low freq RX -and- TX 
response and the LPF above 4 kHz. You are probably covered.

My main concern was that some had done only RX -or- TX mods on their 
own. Some only have modified the RX path, some only the speaker path, 
but not other paths etc. Just adding the LPF would have left them with a 
different board than the DSP Upgrade board. Also, its really impossible 
for us to support boards modified in a non-standard manner since we 
don't know what the user has changed. Hence my recommendation for most 
to go the DSPUPGD board route.

73, Eric
(-Really- going off line now..)

_..._



Brett Howard wrote:
> My issue is that I've already added a LPF daughter card and I've already
> done a modification for low frequency extension.  However Eric has
> mentioned that there are further enhancements beyond just these two
> things in one of his emails.  Eric said in a previous email "There are a
> number of changes outside of the DSPLPF, and the low freq value
> changes".
>
> I'd just like to know what the changes are so that I can do the rework
> myself.  Barring being told what the rework is (if Elecraft wants to
> keep that secret) then I'd like to know what I should expect when I
> install this improved board.
>
> Heck depending on what the price of a DSP board is I'd be willing to
> sign something saying that if I break my board I'm willing to send in
> the broken board and pay full price for a new one if Elecraft would send
> me the rework instructions.  I'm sure there are a set of instructions
> being used by the techs reworking the boards.
>
> ~Brett (KC7OTG)
>
>