[Elecraft] KDSP2 auxbus won't synchronize

[Don Wilhelm]

John,

I really don't know why that 'notify us ...' statement is still in the 
KDSP2 manual I believe it should have been removed after a short time of 
experience with the KDSP2.  Perhaps Lyle Johnson can shed some light on it

An intermittent of any nature is usually caused by a bad solder 
connection.  How hot was your soldering iron when you did the soldering? 
  If it was less than 700 degrees F, you may not have heated the solder 
pads sufficiently and you have a bad solder connection but don't know 
it.  Turn your soldering station up to 750 degrees F and reflow the 
board adding a bit of extra flux if any connections look suspicious.  If 
you do not know what to look for when evaluating the soldering, look at 
the soldering document in the Builder's Resource page of the Elecraft 
website - there are several illustrations that may be helpful.

73,
Don W3FPR

John Moore wrote:
> Sirs,  I hope one of you can help.  I have assembled the KDSP2 and have 
> been using it for 2 mos.  Occasionally I'd have to "restart" my K2 when 
> it couldn't find the DSP (lost synchronization)  to re-establish proper 
> function.  I now can no longer get the K2 to syn with the KDSP2.  I have 
> done what Elecraft has recommended, specifically, gone over assembly, 
> checked for seated ICs,  resoldered every connection, and still no 
> diff.  The DSP filters come on but no access to adjust them and on cw 
> the freq is way too high rendering it useless.  Why does the manual say 
> "let us know if this happens frequently"?  tnx,  I enjoy reading the 
> reflector daily.  73  John  N0GBR