OldSynths

Hi Bob,

Rail voltages are normal.   Old 301's were soldered in--the ones I've replaced (not 
with 301's but with LF351s) were put into sockets (good machined ones).

Thanks,

David

--- In oldsynths@yahoogroups.com, "Bob Weigel" <sounddoctorin@m...> wrote:

> David, were you soldering these 301's in or where they socketed?  First
> question that comes to mind...did you get it inbackwards or wrong somehow of
> course...  Not likely the divider would go bad.  Are rail voltages normal at
> this point? -Bob
 
> > I replaced several 301's in the ARP, and everything started working
> > perfectly except for one preset (Fuzz Guitar I) and the vibrato
> > circuit.   I identified that an additional 301 (the pulse/saw mixer)
> > was the probable culprit, replaced that, and then the whole thing went
> > dead!  Dead in a new way, though,  because now it doesn't even make the
> > one low tone.
> >
> > I've traced the voltage to the following probable cause:  the octave
> > divider chip(s).
> >
> > Does anyone think that this chip could have suddenly gone bad and
> > caused a complete dead unit?  Or would there be different symptoms?
> >
> > My other thought is that my fiddling around with the boards broke loose
> > a wire or something.
> > This was really heartbreaking, because for about five minutes, I had a
> > fully working unit!
> >
> > Please continue to help if you can--I'll be here all day!  ;-)
> >
> > David
> >
> >