[sdiy] LM326 anyone? DS-2 TURBO-NIGHTMARE!!

Bob Weigel sounddoctorin at imt.net
Fri Nov 6 12:58:09 CET 2009


I should have known by the front panel that we might be in for trouble.  
Hehe.  I had to totally rebuild the lfo board in particular..clean up 
mildew on the back inside.  Lots of dirty sockets on other boards and 
blown chips all over the place.  Got it MOSTLY working then.  stupidly 
forgot to unground my probe and the ground flipped off and skated and 
arc and we apparently have a dead LM326.

ALSO though if anyone is familiar with the unit..where the heck is the 
2nd tuning pot?  It shows the front panel pot on the diagram, the 
trimmer on the oscillator board (1 for each DCO)..AND ANOTHER which goes 
off pin 5 and 6 counting from left I see... please..if anyone knows 
don't make me trace it. I've poured so many hours into this 
thing....it's been on the bench working late 4 nights on it now...  It 
blew up a BUNCH more chips when the regulator went down.  Horror story.  
But you can't let these things die they're just too cool! :-)



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