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Subject: Re: [oldsynths] Question about Cat osc stability

From: Al Thompson <biggles58@...>
Date: 2006-07-04

I would closely check the voltage stability.  I had a 2600 years ago that had horrible problems like you describe, and it was simply a bad voltage regulator.
 
It can also be a bad (dirty) pot.  Check all of the tuning pots. 
 
Also, do the usual poke and prod test, to see if the osc wander can be changed by poking parts, connectors,  etc.  Shake the whole synth and see what happens.



Adam McKinley <adam.mckinley@...> wrote:
Hi,

I recently acquired an Octave cat (non SRM).

My Cat has really horrible oscillator stability. It squirms while holding notes. Sometimes it even will plummet down several octaves like a slow glide, or as if following an envelope release.
It definitely is way out of tune across the keyboard.
The question is whether you think a tuning will fix my Cat or if there is likely something more serious is involved?

I’m preparing to clean and tune the unit as I write this.
The Cat is completely disassembled. It appears that it may never have been opened and/or re-tuned before.

Thanks for your time,
Adam



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