[Elecraft] DIY DSP Rev D

[Brett Howard]

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)

On Sat, 2010-01-02 at 19:58 -0600, Grant Youngman wrote:
> Good grief guys.  Look at the shipping status on these. "Due to the high rate of orders for this item, and the slow rate of return of the exchange DSPs, new K3DSPUPGD orders take 2-4 weeks to ship".
> 
> it would appear that Elecraft is reworking returned boards to "D" level.  That seems perfectly rational.  Why would they take your returned Rev B board and just shred it,when there are just a small number of component changes and the addition of a daughter board?  
> 
> I'm sure the D board you get from Elecraft will be "perfect" in all respects.  Most likely the C board I got from Elecraft was reworked.  Haven't lost any sleep.  Reworking a board like this, especially for simple component changes (simple if you know what you're doing and have the right tools, that is!)  is common industry practice.
> 
> On Jan 2, 2010, at 6:25 PM, Bob Garrett wrote:
> 
> > Bret,
> > 
> > Please send us the details and source claiming these are reworked boards. 
> > 
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