Re: [PolySix] EG and VCF not working after battery leakage
2014-05-28 by Phil65
Hi Bob, You are really helpfull. Merci ! 1) I did the DAC calib again and turning VR6 CCW = from led 8 to led 7 6 then 5, while turning VR7 CCW from led 8
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Re: [PolySix] EG and VCF not working after battery leakage
2014-05-28 by Bob Grieb
Hi Phil, If you are seeing LEDs 1 and 8 in DAC calibration mode, that implies that the DAC and the input muxes are working. Another thing to try -
Re: [PolySix] EG and VCF not working after battery leakage
2014-05-28 by Phil65
Thanks Bob for your quick answer ! Seems that my patch looses EG from memory. I have no sound unless I put the VCA switch from EG back to square again to
Re: [PolySix] EG and VCF not working after battery leakage
2014-05-28 by Bob Grieb
See if these functions can be controlled correctly when using patches in memory. If so, then the output from the CPU to the analog circuits is OK. Then
EG and VCF not working after battery leakage
2014-05-27 by phil0065@yahoo.fr
Bonjour ! I am French and happy to join this group of Polysix owner. My old Polysix bought back in 1983 has been sleeping in the attic since 1990, until I have
Re: Square Wave on the MG (LFO) Instead of Triangle?
2014-05-27 by radek.tymecki@op.pl
Has anyone tried it? Seems quite interesting. Or maybe somebody can guide how to make additional selectable LFO s and how to put it into p6? Good place would
Re: 6th voice detuned
2014-05-27 by aletropdj@yahoo.com
I got -9.54V. Compared with the other voices seems the same. Now its calibrated again, so I need to wait until cool down to try again... Any tips or ideas are
Re: 6th voice detuned
2014-05-27 by swamp.gigs@googlemail.com
Have a look at IC36 - the TL072. If you have a scope, check pin 7 - you can cross reference the measurement with the 2nd and 4th voices for values. It s a good
6th voice detuned
2014-05-27 by aletropdj@yahoo.com
Hi all, Everytime I turn on the synth, the 6th voice its detuned from the other ones. Normally I need to wait 10 minutes to become tuned again. this is
PCG Tools
2014-05-09 by michelkeijzers@hotmail.com
Dear reader, I made a poll at http://www.korgforums.com/forum/phpBB2/viewtopic.php?p=593472#593472
Re: [PolySix] I killed my PolySix, help!
2014-05-06 by Bob Grieb
Hi Jeremy, X1 is a ceramic resonator which functions like a crystal in the oscillator of the 8049, but is less expensive and less accurate. I am
Re: [PolySix] I killed my PolySix, help!
2014-05-06 by Jeremy Pisani
OK, I might go for the USB scope then. I did notice a couple of things today that seem important; the following keys don t seem to be lighting up the diodes on
Re: [PolySix] I killed my PolySix, help!
2014-05-06 by Bob Grieb
Hi Jeremy, I m a little bit of a scope snob , so maybe not the best one to ask. Certainly the Hantek device would be a lot better than nothing. I
Re: [PolySix] I killed my PolySix, help!
2014-05-05 by Jeremy Pisani
Well, I ve been looking into a scope, but really the only thing within my budget would be something like this:
Re: [PolySix] I killed my PolySix, help!
2014-05-02 by Bob Grieb
It would certainly make things a lot easier. Troubleshooting a processor-based system with a DMM is pretty tough. Hard to say if 4.7 instead of 4.82 means
Re: [PolySix] I killed my PolySix, help!
2014-05-02 by Jeremy Pisani
I m getting 4.7V on pin 4 of IC22. Not sure how to measure the ripple with the DMM, I have it in AC mode, but I just get a low reading (2v or so) which quickly
Re: [PolySix] I killed my PolySix, help!
2014-05-02 by Bob Grieb
OK. Seems like there may be an issue with the 5V supply. Possibly a bad filter cap in the power supply, or maybe something that is drawing lots of extra
Re: [PolySix] I killed my PolySix, help!
2014-05-02 by Jeremy Pisani
Thanks again for your help. Here s the values I got after doing the power supply calibration: *+15V: 15V* *-15V: -15.06V* *+5V: 4.82V* *-5V: -5.01V* VR2 is all
Re: [PolySix] I killed my PolySix, help!
2014-05-01 by Bob Grieb
Sometimes a DC voltage will read low because it has a lot of ripple on it. If you have a bad filter cap, it could cause a volt of ripple on the 5V supply,
Re: [PolySix] I killed my PolySix, help!
2014-05-01 by Bob Grieb
Check the voltages right at the power supply. The 56K resistor is for the low voltage sense test, I think, not the DAC cal, but you are supposed to get the
Re: [PolySix] I killed my PolySix, help!
2014-05-01 by Jeremy Pisani
Hey Bob, Thanks for the reply! Haven t had a chance to look at the PolySix since I sent this, but hopefully I ll be able to get back to work on it in a day or
Modysix - Midi retrofit and feature extension for Polysix and Poly-61
2014-04-29 by Tobias Münzer
Hi, Hi, I would like to announce the second Tubbutec product, the Modysix . It is a cpu replacement for Korg Polysix and Poly-61
Re: [PolySix] I killed my PolySix, help!
2014-04-29 by Bob Grieb
The LEDs that you say are working are controlled by the key assigner MCU. The other LEDs are controlled by the MCU on the KLM367 bd. Can you get into the DAC
I killed my PolySix, help!
2014-04-28 by <jeremy.pisani@gmail.com>
So, I did a stupid thing. I got my PolySix a few years back, and it had the leaky battery issue. I sent the board off to be fixed by Old Crow s synth shop, and
Modular inputs, override MG / individual ins for OSC/Filter mod?
2014-04-27 by <nonomonomusic@googlemail.com>
Hello there! I d like to integrate my polysix more with my eurorack modular synthesizer (e.g. polyphonic fm patches etc). I am not really interested in modding
WTB/WTT: Anatek Pocket Filter / Midi Solutions Event Processor
2014-04-24 by <gil_we@yahoo.com>
Hi, I m looking for one of these... if you have one which you d like to sell or trade please email me: gil_we(at)yahoo.com Thanks !
Re: [PolySix] Re: New file uploaded to PolySix
2014-03-28 by Bob Grieb
Yes. May also help a little with debugging missing traces, etc. Always good to know what s happening inside that little black thing. Bob
Re: New file uploaded to PolySix
2014-03-28 by <josh.nursing@gmail.com>
Very cool, Bob. That would help in the case of re-implementing a new control core with an Arduino or other MCU.
New file uploaded to PolySix
2014-03-28 by PolySix@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the PolySix group. File : /klm8048.asm
Re: [PolySix] Re: KLM368a diod
2014-03-27 by Terje Winther
... Thanks. ... That is part of the KiwiSix upgrade. Besides chaning the processor board completely, there are 2-3 other changes that needs to be done, and the
Re: KLM368a diod
2014-03-27 by <josh.nursing@gmail.com>
Thanks Terje, clever mod and nice little touches like the aligned MG2 LED there too in your front panel. In the pics you graciously provided, I can also see a
Re: [PolySix] Re: Various Polysix modifications
2014-03-27 by Terje Winther
Yes, the LFO is produced on the processor board (lower right corner of the KLM-367 page in the service docs), and then travels to the front panel through a
Re: Nice mods.
2014-03-27 by <josh.nursing@gmail.com>
Hi Chip, Thanks for the detailed response, it helps a lot to discuss the architecture and the possibilities as they can directly impact the feasibility of the
Re: Various Polysix modifications
2014-03-27 by <josh.nursing@gmail.com>
Hi Terje, Could you provide additional information as to how and where you installed the Mod Wheel switch to swap in your external LFO, please? Thanks a lot.
Re: Nice mods.
2014-03-25 by <chipaudette@yahoo.com>
Regarding ENV- LFO, you have to decide whether you want one ENV to affect your one LFO (which is then applied universally to all voices), or if you somehow
Re: Nice mods.
2014-03-25 by <josh.nursing@gmail.com>
Since I repaired the oscillating part of the MG/LFO I gave the KLM-367 a little mod for increasing the LFO speed. I wanted to increase it by an order of
Re: MG / LFO Q1 transistor replacement.
2014-03-25 by <josh.nursing@gmail.com>
You d have corrected: so that G is in mid position :) Side effect as I haven t re-done calibration: my LFO is faster than before. Some fun sound effects
Re: MG / LFO Q1 transistor replacement.
2014-03-24 by <josh.nursing@gmail.com>
Got the MPF102 this afternoon, checked the pinouts, and decided to twist G and S, so that D is in mid position like the original DGS arrangement when looking
Re: [PolySix] [Issue Debug] EG, Octave, buttons strange behaviour.
2014-03-24 by Dennis Matana
Definitly a dataline problem...also check if the datalines reach the pull up resistor array next to the cpu. i had similar problems with the waveform and
Re: [PolySix] [Issue Debug] EG, Octave, buttons strange behaviour.
2014-03-24 by Bob Grieb
Hi, Maybe you have fixed it already? If not, check D0 and D1 connections from KLM367 to the front panel. It seems like maybe one or both of these
Re: [PolySix] Re: Thanks!
2014-03-24 by Stephen Laughlin
You could totally get those rapid-fire hats on the 707 by sequencing its instruments externally though, through Ableton Live for instance. I ve been
Re: [PolySix] Re: Thanks!
2014-03-24 by Stephen Laughlin
Ah good ear! Sorry, that s a Korg ER-1. :) I have everything hooked up to my setup now so I was just jamming around. Sorry to be misleading. The PolySix and
Re: Thanks!
2014-03-24 by <chipaudette@yahoo.com>
Around 1:30-1:50, where the 707 hi-hats come in, how do you get that superfast triplet on the hats? I ve got a 707, too, and I d love to get that! How did you
Re: Thanks!
2014-03-22 by <josh.nursing@gmail.com>
Cool jam.
Thanks!
2014-03-22 by <ocguitar@gmail.com>
Hey, I just wanted to say thanks to everyone on this board for helping out with resurrecting my PolySix. It s been almost a year since I picked it up for $300
Re: [PolySix] KiwiSix/Polysix, Two voices gone out of tune?
2014-03-21 by <josh.nursing@gmail.com>
That s quite the norm for vintage analogs. ... I guess it may just need a lot of time to warm up.
Re: [PolySix] KiwiSix/Polysix, Two voices gone out of tune?
2014-03-21 by Stephen Laughlin
Yep, the main board had battery damage. It was replaced with the KiwiSix board though. I suppose some corrosion may have snuck around elsewhere.
Re: [PolySix] KiwiSix/Polysix, Two voices gone out of tune?
2014-03-21 by Robert Stewart
OK... If it s sharp to start with and then improves once it s warmed up, I m familiar with that kind of fault as well. Has your Poly Six been battery damaged
Re: [PolySix] KiwiSix/Polysix, Two voices gone out of tune?
2014-03-21 by Stephen Laughlin
Interesting! You know...I ve been playing with it for two hours straight and it s currently behaving really well. The two bad voices started out sharp for a
Re: [PolySix] KiwiSix/Polysix, Two voices gone out of tune?
2014-03-20 by Bob Stewart
As a tech who repairs synths I get quite a fe things come through my door that don t manifest their faults easily. What I usually do is set up the synth, and