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Subject: Re: [korgpolyex] VCF Drift Problem

From: billmeirelles@...
Date: 2011-07-27

Now I can here it's happenig when in 12dB too, looks more like the voltage is
changing just like a rando LFO will do but it comes a go, you never know when.
Can be a bad cap, a broken solder or? Any ideas?


Em 27/07/2011 16:33, Gordon JC Pearce < gordon@... > escreveu:

On Wed, 27 Jul 2011 19:04:26 -0000
"Bill Meirelles" <billmeirelles@...> wrote:

> Hi folks,
>
> It started yesterday, randon vcf positions as if it has an S&H LFO at the CV input of the VCF, I double checked the wiring and tried to disconnect all the pcb connectors and reconnect them several times, tried to move the wiring while the synth is playing to, I just can't find it. My guess is I should start looking for a broken solder and if I can't find any I should recap the filter circuit, am I right?

Only if you plan to scrap it afterwards.

Never, ever "recap" equipment.

If you find in the course of your investigations that some capacitors have failed, by all means replace them - and if you find that two of the six voices have the same capacitor faulty you may as well do the other four - but do not just go randomly ripping components out and changing them. That's a great way to ruin your gear.

Have you any reason to suspect the capacitors are in any way faulty?

Gordon MM0YEQ