[sdiy] Prophet 5 -15v rail is shorting... Need advice

[harrybissell at wowway.com]

Soldif Tantalums may outperform the low ESR Electrolytics
at high ambient temperatures. Life will probably be longer.
Your synth should NEVER get THAT hot, or you have a host of
bigger problems...

H^) harry





On Wed, 7 Nov 2007 19:21:45 +0100, ASSI wrote
> On Mittwoch 07 November 2007, Gil W. wrote:
> > Could the -15 regulator partially go defective, in a
> > way that it blows tantalums but works fine using
> > electrolytes ?
> 
> Possible, but unlikely.  If the tantalum was a 10V type, it had a 
> snowflakes chance of surviving hell on a 15V regulated output.  If 
> you now use a modern electrolyte with low ESR, the reason for having 
> a tantalum has gone away, otherwise just additionally bypass the 
> supply just after the regulator with a 100nF ceramic cap.  The rule 
> for tantalums is to use them at max. 2/3 their rated voltage or even 
> less than that.
> 
> Achim.
> -- 
> +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk]>+
> 
> Wavetables for the Terratec KOMPLEXER:
> http://Synth.Stromeko.net/Downloads.html#KomplexerWaves
> 
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Harry Bissell & Nora Abdullah 4eva