Discussion about the Korg PolySix synthesizer

Hi,

How is the warm-up phase behaving? (You know, holding a key during
power-on; the first 10-20secs you hear the tuning stabilize)



gil_we wrote:
> anyone ?
> 
> --- In PolySix@yahoogroups.com, "gil_we" <gil_we@y...> wrote:
> 
>>I wonder if anyone would have any idea about the following problem...
>>It's a friend's Polysix we both recovered from battery leakage a year
>>ago, and left it untuned after we experienced some problem tuning it.
>>Now we got back into it and we realized that on the tuning circuit
>>KLM-366 new production):
>>
>>VR2 - just doesn't make any change to the tuning... (the resistor 
>>itself is ok)
>>VR1 - When adjusting it the pitch will drop or raise the first second
>>but than will slowly get back to the initial pitch before changing
>>its setting !
>>The VR determing the D#4 to E4 gap seems to barely make any effect...
>>All other VRs (Mid tune, VR3 low tuner, VR10/11 on all vco's) seems
>>to work, but strangly VR15 makes change to the sound but not to pitch
>>(I understand it is also a kind of mid-tuner).
>>
>>We replaced both 4051 in the tuning circuit and the two 072 and it
>>didn't make any change... Well, actually, after replacing IC39 the
>>low tuning started to work more or less ok (it is tuned more or less
>>at the lower octaves but not at all at the higher octaves...)
>>
>>I wonder if anyone has any idea what could cause it ...
>>
>>Thanks all.
>>
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