well 5 of the 6 are 'perfect' this one voice (unit) has now drifted even higher and the tuning pots don't provide enough range to bring it into tune with the others.. so if I am to assume the chip is dying can't understand as I swapped the 2056 between units and the chips didn't make a difference (the voice was still voice 4 out of tune even with chip swap) now if it's chip 2044 (the famous ones!) then I've not tried a swap yet... I'll pick one up if that does it..
thanks
To:
PolySix@yahoogroups.comFrom:
jpirard_1999@yahoo.comDate: Fri, 25 Sep 2009 16:00:05 +0000
Subject: [PolySix] Re: out of tune?
I remember years ago, that I had the same problem, had to plug the unit in while setting up the rest, in order to be able to play it correctly later. I remember (vaguely) opening it up and going to component on someone's advise and carefully adjusting a turn-screw to get the voice more in tune. THat back fired because once it stablized, it was out of tune the 'other' way. Eventually it would stay in tune an I used it that way for 3-4 years, until it fried itself....:{
--- In PolySix@yahoogroups.com, Paul T <sharpfish@...> wrote:
>
>
> What about a polysix that takes... 5 mins for just a SINGLE voice to be in tune (the other 5 are in tune as soon as you switch it on)? Obviously it's IN tune as it ends up in tune, but the fact it's only ONE voice (always the same one!) that has a delay 'warming up' does it hint a fault with one of it's chips or caps? if so I'd like to fix it.
>
> thanks
>
> To: PolySix@yahoogroups.com
> From: johau@...
> Date: Tue, 22 Sep 2009 21:43:41 +0200
> Subject: Re: [PolySix] out of tune?
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> How do you come along?
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> Here is what happens (should happen):
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> 1) set the front panel Tune knob to center position
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> 2) on KLM-366: set sliding switch to "normal" position (away from CN12)
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> Be sure to have selected POLY Key assign mode
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> 3) set potis VR10 (Tune Low) and VR11 (Tune High) of UNIT0
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> to center position
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> 4) tune UNIT0 (you can recognise which voice (or UNIT as they call it)
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> is active by the small LED on KLM-366) in low, mid, and high range by
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> poti VR2 (high), VR3 (low), VR15 (mid), and VR14 ("D# ADJ"). VR14
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> does have very little impact. When tuning low notes switch the
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> OCTAVE setting on the front panel to 16', when tuning high note set
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> it to 4'. Use a chromatic tuner.
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> 5) once you are satisfied with UNIT0 (it will NOT be 100%!) proceed to
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> UNIT 1. Dont touch the common potis VR2, VR3, VR14, and VR15; just
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> VR10 and VR11 of each UNIT. Do not use the tuner for that but rather
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> tune it to UNIT0, observing the effect of tone beating. You have to
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> play UNIT0 and the UNIT you want to tune.
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> 6) If you are through with all 6 UNITs set up a "chord" of six equal
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> notes using the HOLD mode and press CHORD MEMORY. Now play notes
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> over the whole range (low 16' .. high 4') and listen. All 6 voices
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> sound simultaneously. But in contrast to UNISON mode the voices are
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> not detuned but "equal". Still they will not be equal 100% over the
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> whole range. It is 6 independent oscillators with true analog
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> circuitry, which will not be 100% perfect.
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> If you are satisfied with the precision set SW1 to the "Stretch
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> Tuning" position (towards CN12). Now the tuning is set intentionally
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> off a few cent over the whole range, you can check this with the
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> tuner. This adds richness to the sound as the 6 voices start (even
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> more) beating.
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> I hope this helps.
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> Johannes
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> blindcatfishwillie wrote:
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> > Hi,
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> > I've searched all I can on this great forum but I still can't figure out how to get by polysix back in tune. Andrew did a spectacular job restoring the CPU board but now I need to give attention to the tuning board. I have the service document but can't make much sense of it. It seems too many things are out of spec to make it work. There is a post from Johannes stating:
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> >
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> > "5.) Now start to tune UNIT0. Take the adjustment procedure as a hint
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> > of what will happen when you turn certain potis"
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> >
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> > I just can't figure out what pots to turn to make what happen. The problem (and I should have stated this earlier) is that an octave in sound stretches more than an octave worth of keys.
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> > Thanks for any guidance or offers of help!
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> >
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> > Jesse Olley
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> > ------------------------------------
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> > PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6Yahoo! Groups Links
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