Vintage Synth Repair

>Would it be safe to replace all the tantalum caps in
>my OBXa with
>regular electrolytic caps (as long as their of the
>same specs of
>course) ?...

It depends on how the caps are used in the circuit.  Aluminum electrolytic 
and tantalum capacitors have different characteristics- in certain cases, it 
might adversely affect circuit performance.  If the tantalum capacitors are 
just used for decoupling (across the power supply rails at various points in 
the circuit), it shouldn't present a problem (actually it might be a good 
idea, as tantalum caps tend to fail rather spectacularly if given too much 
voltage), but if they're used anywhere in the signal path, it probably 
wouldn't be much of an "upgrade" to replace them with electrolytics.

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