Vintage Synth Repair

As I think I've said before the bulk of my electronics
experience is in fixing logic circuits, PSU's and
monitors in archaic arcade video games,like Space
Invaders and so on from the same sorts of periods as
synths..and I have to say where there's a tant there's
trouble, maybe 50% of the time.  


--- Malte Rogacki <gacki@...> wrote:

> At 16:40 Uhr -0400 08.05.2008, Roy J. Tellason
> wrote:
> >> The german wikipedia states that older tantalum
> caps are sensitive to
> >> low-ohm switching and could easily fail under
> such circumstances. Don't
> >> know if this could be a reason.
> >
> > I don't know, though I do see many references to
> them being a problem in
> > older equipment, Tektronix scopes being one of
> them. Most of the time it's
> > their sensitivity to overvoltage that's described
> as being the problem.
> 
> Well, the power supply decoupling caps in the
> various ARP synths are rated
> 35V and put across +15V and -15V to ground; and I've
> seen them fail
> regularly (the current Omni being an example); I've
> also had this problem
> with synths from other manufacturers and with
> effects boxes.
> 
> 
> -- 
> Malte Rogacki gacki@...
>
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> "Don't forget to TURN ON THE SYNTHESIZER. Often this
> is the reason why you
>  get no sound out of it." (ARP 2600 Owner's Manual)
>
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> 



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