New Boards KLM367
2011-10-19 by Scott
I ve constructed 3 of them. I wont do THAT again. Wayyyyyyyy too much time. Finding parts , ordering parts, arraigning parts,installing 100 s of parts. I have
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Re: Don Backshall is a great guy!!
2011-10-18 by Mike
No, I m not trying to flatter anybody. I understand that I made lots of mistakes. IC16 might have been a botched attempt to salvage a part for another
RE: [PolySix] Don Backshall is a great guy!!
2011-10-14 by backshall1
Michael, Unfortunately, I stopped working on old damaged boards a couple of years ago when the new clone boards became available. The old boards just seem to
RE: [PolySix] Don Backshall is a great guy!!
2011-10-14 by backshall1
Unfortunately, both the calibration problem and MG bleedthrough are happening on the new clone board, not an old damaged board. It s not the first time I ve
Re: [PolySix] Don Backshall is a great guy!!
2011-10-13 by michael
Mike, I appreciate the referral. I just messaged him to see if I could get him to accept some money to fix my polysix!! Thanks, Michael From: Mike
Re: [PolySix] Don Backshall is a great guy!!
2011-10-13 by klosmon
Nice guy, indeed. Two things: first, I ve encountered many old 367 boards that were incapable of D/A calibration (as specified in the service documents) that
Don Backshall is a great guy!!
2011-10-13 by Mike
Don Backshall solved all of my PolySix issues and did it for basically a handshake. Furthermore, he mailed my KLM-367 board back to me in good faith before my
Looking for Repair Technician Detroit Area
2011-10-12 by jon r
please message me your information. Thanks
Reparing a very bad KLM-367A
2011-10-07 by stargliderdev
Hi there, I m reparing a PolySix that I bought recently because no one did :-) and I m starting in the KLM-367A, there no signs of battery problems, but a mice
Re: Polysix Programmer bug after preset playing into tape input
2011-10-04 by kroutshev
Hi P6 folks, i have found the solution, CMOS Ram IC32 was out of order. I have replaced it by a new one and my P6 is working well now. Thanks for your help !
Just did the ol' Battery replacement, it now sounds different
2011-10-03 by jon r
Hi there, Just took the dive today and replaced an old corroded battery. The leakage stayed on the battery and there was nothing on the main board that was
Re: [PolySix] KLM 367 Clone Problems...
2011-09-26 by Ben Stuyts
Guys, please be careful with disclosing any personal/financial information on this list. Thanks, Ben (moderator)
Re: KLM 367 Clone Problems...
2011-09-26 by Mike
Thanks again Don. I m going to drop it off in the mail today. Please let me know how much this whole ordeal is going to cost and I will promptly send you a
Re: [PolySix] Rebuilt 367 board issues
2011-09-23 by roboliot@sbcglobal.net
Der, I had read about the bugs with the missing tracks... I guess I forgot to implement them... as well as the stock transistors in the wrong orientation.
Re: Rebuilt 367 board issues
2011-09-22 by roboliot@sbcglobal.net
I will look at the 366 today. The Arp LED does blink, and the rate changes as I turn the speed pot clockwise as usual.
Re: RE: [PolySix] Rebuilt 367 board issues
2011-09-22 by Jed Jorgensen
Also double check your transistor orientation. Some of the modern replacements have different pinouts than the old ones, so if you used any old ones they could
RE: [PolySix] Rebuilt 367 board issues
2011-09-22 by backshall1
The MG issue could be caused by forgetting to fix the two missing traces on the clone board. Did you complete the two bug fixes mentioned on Jed s site:
Re: [PolySix] Rebuilt 367 board issues
2011-09-22 by Malte Rogacki
Here s something that gives food for thought: ... The latter means that there is some problem with the KLM366 board (or perhaps with the interconnects or the
Rebuilt 367 board issues
2011-09-22 by roboliot@sbcglobal.net
Thanks to everyone here, this is an amazing place. That said, I am completely stumped with my rebuild. I just recently finished up my KLM 367 rebuild, and
Re: [PolySix] Can you diagnose my possessed Polysix?
2011-09-19 by Ben Stuyts
Hi James, I had a look at the schematics. Before taking out any of the boards, check this first: Maybe the power supply lines to the front panel boards are
Re: [PolySix] Can you diagnose my possessed Polysix?
2011-09-19 by Andrew Jury
Hi James, I have sent you a personal message about your issue. Check your mail! Cheers, Andy ... [Non-text portions of this message have been removed]
Re: [PolySix] Can you diagnose my possessed Polysix?
2011-09-19 by Johannes Hausensteiner
Hi, You have a problem with your KLM-367 board (which does all of the patch related things). The things one can see in the video do make sense technically;
Can you diagnose my possessed Polysix?
2011-09-19 by James Meagher
Hello all A few months ago I bought a Polysix from an acquaintance the day before he moved to Toronto. I went to his house and played it and found only two
RE: [PolySix] Re: Another KLM367 clone issue: MG Delay
2011-09-18 by backshall1
No charge, other than parts and return postage, as long as you don’t mind me posting the results to the group here. It’s an education thing, to enlighten
Re: Another KLM367 clone issue: MG Delay
2011-09-18 by Mike
Also, How long do you think it will take to fix? -Mike
Re: Another KLM367 clone issue: MG Delay
2011-09-18 by Mike
I know you don t have the board, but do you have an idea of how much it will cost? Also, how do you want to get paid? -Mike
RE: [PolySix] Re: KLM 367 Clone Problems...
2011-09-18 by backshall1
Hi Mike, I can take a look at your board if you want to mail it to me. I have a couple of boards to compare it to and most of the parts for another one. Don
Re: KLM 367 Clone Problems...
2011-09-18 by Mike
Well,my PolySix has been on the back burner for a while now.. I fixed the PSU issue and it looks like it messed up somehting on my KLM-367 board. So, my
Re: Newbie with the usual questions (dead keys)
2011-09-16 by antithetical2
Wow! Excellent replies, and fast! Thanks so much! This is great info. It didn t even occur to me that the fumes from the leaking battery might cause
RE: [PolySix] Newbie with the usual questions (dead keys)
2011-09-16 by backshall1
I would assume first that the key contacts will clean up okay with some alcohol on a cotton swab. The keyboard scanner/assigner circuit is not on the board
Re: [PolySix] Newbie with the usual questions (dead keys)
2011-09-16 by Ben Stuyts
Hi, and welcome to the group! ... I would take it one step at a time. Fix the battery first, and as soon as possible to prevent more damage. If the keys are
Newbie with the usual questions (dead keys)
2011-09-16 by antithetical2
Hi everyone, I did a little searching on this topic but came up with a ton of useful but unrelated info. So I ll ask here. I bought a broken Polysix (aren t
Re: [PolySix] Analog meets 1922
2011-09-07 by Carvalho
I can t help but thinking that the most period correct would have been to play it on a Novachord. But in lack of a Novachord a PolySix will do just fine!
Re: [PolySix] Analog meets 1922
2011-09-05 by Ben Stuyts
... Like! Ben
Analog meets 1922
2011-09-05 by Jw W
Polysix fans, I have made a soundtrack for the 89 year old film, Nosferatu. I have posted the last couple scenes with my music. Most of it is from my Polysix
Tape Verify problem
2011-08-25 by Shaun
Hello Everybody, I m pleased to find a group dedicated to this synth. I have a Polysix in excellent cosmetic condition which I picked up for almost nothing
RE: [PolySix] Re: Polysix Programmer bug after preset playing into tape input
2011-08-24 by Bruno BzH
Hi Don, thanks for you quick answer.Yes i have removed old battery to replace it by support and new coin cell and of course i have removed c49 and replaced
Re: Polysix Programmer bug after preset playing into tape input
2011-08-23 by Donald Backshall
Hi Bruno, If the wrong LEDs light up, then there is most likely still a problem with the D0-D7 tracks on the KLM-367 board that go to connector CN10 and then
Polysix Programmer bug after preset playing into tape input
2011-08-23 by Kroutshev
Hi, First thing, thanks a lot for that mailing list for polysix which is very helpfull. Second thing, i m not english native speaker, by advance sorry for my
Re: [PolySix] Hi Polysix group.
2011-08-22 by Ben Stuyts
Hi Kenneth, ... Welcome to the group! ... First thing to check (and replace!) is the battery, even if it might not be related to the problem at hand. If you
SV: [PolySix] Hi Polysix group.
2011-08-22 by Kenneth Abildgaard
Thanks for everything. Well .. I kept it on for 10 hours and now the sound is perfect for some reason. I have turned it off again and will test it again
Re: [PolySix] Hi Polysix group.
2011-08-22 by klosmon
Should also mention: something else to try is cutting the trace between CN06-2 and R9; this is the CV from the mod box to the VCO, and it runs very close to a
Re: [PolySix] Hi Polysix group.
2011-08-22 by klosmon
First place to look is the VCO Mod output from the CPU board to the voice board (CN05 -12). This should be a smooth voltage; distortion here will be reflected
Hi Polysix group.
2011-08-21 by Kenneth Abildgaard
And thanks for having me J I recently acquired a Polysix in very nice cosmetic condition but it has an issue with it s sound. I bought it knowing this but
Re: [PolySix] Another KLM367 clone issue: MG Delay
2011-07-29 by Malte Rogacki
Here are a few more observations/measurements. Feel free to correct: Pin 2 on IC14 gets the control voltage for the MG delay; the range is between about -4.6V
Re: Replacement for HTV P1501 photocoupler?
2011-07-28 by ltern_te
Hi Don, I ve finally found the time and finished repairing. I needed to put abt 9 k on the trimpot placed on the R93 location for a good stability in tuning
Re: [PolySix] Another KLM367 clone issue: MG Delay
2011-07-28 by Malte Rogacki
As far as I can remember (I did measurements the last time but not this time around) the voltage on pin 3 of IC14 doesn t drop sufficiently; and this could be
Re: [PolySix] Another KLM367 clone issue: MG Delay
2011-07-28 by Andrew Jury
Strange! The only two real big differences between the 2SC945 and 2N3904 are the leg positions and the Hfe. The 2N has a far superior gain in this respect.
RE: [PolySix] Another KLM367 clone issue: MG Delay
2011-07-28 by backshall1 (dsl)
Okay, that didn t work. I unsoldered the positive side of C33 and connected it to the other end of R98 and that made the problem worse. So, I put the capacitor
RE: [PolySix] Another KLM367 clone issue: MG Delay
2011-07-27 by backshall1 (dsl)
Yes, I sure have seen this. With a 2 second delay set, if I don t press any keys for a while and then press one, the MG is on immediately. If I play notes no