[sdiy] Formant troubles: uA726's with a very short lifetime

[Synthusiast]

Hi,

Thank you all who responded with all these helpful hints! :-) I'll give all
your suggestions a try soon and will keep you informed about the progress on
the sick VCO's of this Formant synth.

Cheers,
Martijn

> Here is a debugging suggestion...get a pair of 2n3904's (assuming that
> the 726 is a dual NPN), glue them together and wire them in.  They will
> work good enough as an exponential pair to make sure that the oscilator
> works, and if they go poof, you are out only 25 cents.  I would
> definately not plug in anotther 726 until you understand how the first
> one died.