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2016-06-30 by jw_dewdney@yahoo.com
2016-06-30 by <tomlinson6050@roadrunner.com>
BEST (NOT CHEAPEST) fix if NEW contacts: http://shop.lasynthco.com/product/key-contacts-for-korg-poly-oberheim-sequential-prophet-600-kawai-and-others ================================== ---- "jw_dewdney@yahoo.com [PolySix]" <PolySix@yahoogroups.com> wrote: ============= I asked this over in the mono/poly group but got no responses - so I thought I'd try my luck here. I was reading a blog where someone recommended AGAINST CaiKote 44 in favor of someone's proprietary stick on 'dots'... having just received some CaiKote - i'm wondering if anyone would caution against this due to poor longevity (?)
2016-06-30 by <backshall1@bellsouth.net>
Lasynthco has the entire rubber strips, but that’s overkill if you haven’t damaged the strip in some way. I’ve used both CaiKote and the stick-on dots as well as one of the other paint-on silver solutions. The liquids seem to last okay for at least a couple of years but I think the stick-on carbon dots are a more permanent solution. I get them from Bob Weigel at sounddoctorin.com. http://sounddoctorin.com/synthtec/parts/key.htm Don B.
From: mailto:PolySix@yahoogroups.com Sent: Thursday, June 30, 2016 12:14 AM To: PolySix@yahoogroups.com Subject: Re: [PolySix] BEST Key contact repair solution? BEST (NOT CHEAPEST) fix if NEW contacts: http://shop.lasynthco.com/product/key-contacts-for-korg-poly-oberheim-sequential-prophet-600-kawai-and-others ================================== ---- "jw_dewdney@yahoo.com [PolySix]" <PolySix@yahoogroups.com> wrote: ============= I asked this over in the mono/poly group but got no responses - so I thought I'd try my luck here. I was reading a blog where someone recommended AGAINST CaiKote 44 in favor of someone's proprietary stick on 'dots'... having just received some CaiKote - i'm wondering if anyone would caution against this due to poor longevity (?)
2016-06-30 by jw_dewdney@yahoo.com
2016-06-30 by <backshall1@bellsouth.net>
Just watched the video. He certainly did have problems with the bottom two strips and mentioned they might be prone to being fouled easily if a little grease gets on them or something. I would have liked to see him test those strips again after cleaning them with alcohol, in case he did get them dirty while installing. Certainly silver is much more conductive than carbon but I haven’t seen any reviews that report back after a few years to talk about longevity. I can’t say that I’ve tried any of the pen type silver applicators, just the little jars of fairly thick goop. That one he was showing was the MG 8420 ($27.78 on Amazon). Caig also has the CircuitWriter CW100P for $20.34. From: mailto:PolySix@yahoogroups.com Sent: Thursday, June 30, 2016 10:29 AM To: PolySix@yahoogroups.com Subject: Re: [PolySix] BEST Key contact repair solution? oh wow..... those are the 'whole enchilada' then?? i thought it kind of pricey just for 'dots' alone! in the tests done with weigel's 'dots' this guy 'syntegrator' on youtube found them to be inferior to the liquids... though that's just one test but makes me apprehensive...
2016-06-30 by Seekwhensir
Disassemble, clean the contacts in the strips and pcb with isopropyl then lightly dot each charcoal pad with conductive ink. This has been my method, 6 synths so far, one being the prophet 600. https://www.adafruit.com/products/1306?gclid=CMXyyLaN0M0CFYIfhgodhj4L1g K
> On Jun 30, 2016, at 11:48 AM, backshall1@bellsouth.net [PolySix] <PolySix@yahoogroups.com> wrote: > > Just watched the video. He certainly did have problems with the bottom two strips and mentioned they might be prone to being fouled easily if a little grease gets on them or something. I would have liked to see him test those strips again after cleaning them with alcohol, in case he did get them dirty while installing. Certainly silver is much more conductive than carbon but I haven’t seen any reviews that report back after a few years to talk about longevity. I can’t say that I’ve tried any of the pen type silver applicators, just the little jars of fairly thick goop. That one he was showing was the MG 8420 ($27.78 on Amazon). Caig also has the CircuitWriter CW100P for $20.34. > > From: mailto:PolySix@yahoogroups.com > Sent: Thursday, June 30, 2016 10:29 AM > To: PolySix@yahoogroups.com > Subject: Re: [PolySix] BEST Key contact repair solution? > > > oh wow..... those are the 'whole enchilada' then?? i thought it kind of pricey just for 'dots' alone! in the tests done with weigel's 'dots' this guy 'syntegrator' on youtube found them to be inferior to the liquids... though that's just one test but makes me apprehensive... > >
2016-06-30 by <backshall1@bellsouth.net>
Yes, the Bare Conductive pen wins on price, but with selling points like “water-soluble” and “removable” it doesn’t sound like it would be a contender for longevity. It may be suitable for a keyboard that never leaves the confines of a climate-controlled studio but not for gigging at a seaside resort or other high-humidity area. Since it is black, I assume the conductive component is carbon. Don B.
From: mailto:PolySix@yahoogroups.com
Sent: Thursday, June 30, 2016 11:53 AM
To: PolySix@yahoogroups.com
Subject: Re: [PolySix] BEST Key contact repair solution?
Disassemble, clean the contacts in the strips and pcb with isopropyl then lightly dot each charcoal pad with conductive ink. This has been my method, 6 synths so far, one being the prophet 600.
https://www.adafruit.com/products/1306?gclid=CMXyyLaN0M0CFYIfhgodhj4L1g
K
On Jun 30, 2016, at 11:48 AM, backshall1@bellsouth.net [PolySix] <PolySix@yahoogroups.com> wrote:
Just watched the video. He certainly did have problems with the bottom two strips and mentioned they might be prone to being fouled easily if a little grease gets on them or something. I would have liked to see him test those strips again after cleaning them with alcohol, in case he did get them dirty while installing. Certainly silver is much more conductive than carbon but I haven’t seen any reviews that report back after a few years to talk about longevity. I can’t say that I’ve tried any of the pen type silver applicators, just the little jars of fairly thick goop. That one he was showing was the MG 8420 ($27.78 on Amazon). Caig also has the CircuitWriter CW100P for $20.34.
From: mailto:PolySix@yahoogroups.com
Sent: Thursday, June 30, 2016 10:29 AM
To: PolySix@yahoogroups.com
Subject: Re: [PolySix] BEST Key contact repair solution?
oh wow..... those are the 'whole enchilada' then?? i thought it kind of pricey just for 'dots' alone! in the tests done with weigel's 'dots' this guy 'syntegrator' on youtube found them to be inferior to the liquids... though that's just one test but makes me apprehensive...2016-06-30 by Seekwhensir
Ok, just a suggestion. Prophet 600s and pro ones typically need cleaning annually, I'm going on 5 years since, that includes storage. Good luck
> On Jun 30, 2016, at 12:37 PM, backshall1@bellsouth.net [PolySix] <PolySix@yahoogroups.com> wrote: > > Yes, the Bare Conductive pen wins on price, but with selling points like “water-soluble” and “removable” it doesn’t sound like it would be a contender for longevity. It may be suitable for a keyboard that never leaves the confines of a climate-controlled studio but not for gigging at a seaside resort or other high-humidity area. Since it is black, I assume the conductive component is carbon. > > Don B. > > From: mailto:PolySix@yahoogroups.com > Sent: Thursday, June 30, 2016 11:53 AM > To: PolySix@yahoogroups.com > Subject: Re: [PolySix] BEST Key contact repair solution? > > > Disassemble, clean the contacts in the strips and pcb with isopropyl then lightly dot each charcoal pad with conductive ink. This has been my method, 6 synths so far, one being the prophet 600. > https://www.adafruit.com/products/1306?gclid=CMXyyLaN0M0CFYIfhgodhj4L1g > > K > > >> On Jun 30, 2016, at 11:48 AM, backshall1@bellsouth.net [PolySix] <PolySix@yahoogroups.com> wrote: >> >> >> Just watched the video. He certainly did have problems with the bottom two strips and mentioned they might be prone to being fouled easily if a little grease gets on them or something. I would have liked to see him test those strips again after cleaning them with alcohol, in case he did get them dirty while installing. Certainly silver is much more conductive than carbon but I haven’t seen any reviews that report back after a few years to talk about longevity. I can’t say that I’ve tried any of the pen type silver applicators, just the little jars of fairly thick goop. That one he was showing was the MG 8420 ($27.78 on Amazon). Caig also has the CircuitWriter CW100P for $20.34. >> >> From: mailto:PolySix@yahoogroups.com >> Sent: Thursday, June 30, 2016 10:29 AM >> To: PolySix@yahoogroups.com >> Subject: Re: [PolySix] BEST Key contact repair solution? >> >> >> oh wow..... those are the 'whole enchilada' then?? i thought it kind of pricey just for 'dots' alone! in the tests done with weigel's 'dots' this guy 'syntegrator' on youtube found them to be inferior to the liquids... though that's just one test but makes me apprehensive... >> > >
2016-06-30 by Rikard Latvala
I´ve used: http://www.kontaktchemie.com/koc/KOCproductdetail.csp?division=&product=GRAPHIT%2033&ilang=all&plang=all On several rubber strip type key contacts from, Yamaha (dx100) Oberheim (OB-8) Korg (Polysix). Just spray some into the spray can top and use cotton tip/Q-tips to paint the carbon contacts. Dry for 10 - 15 minutes. -----Originalmeddelande----- Från: "backshall1@bellsouth.net [PolySix]" <PolySix@yahoogroups.com> Till: PolySix@yahoogroups.com Datum: 2016-06-30 17:48 Ämne: Re: [PolySix] BEST Key contact repair solution? Just watched the video. He certainly did have problems with the bottom two strips and mentioned they might be prone to being fouled easily if a little grease gets on them or something. I would have liked to see him test those strips again after cleaning them with alcohol, in case he did get them dirty while installing. Certainly silver is much more conductive than carbon but I haven't seen any reviews that report back after a few years to talk about longevity. I can't say that I've tried any of the pen type silver applicators, just the little jars of fairly thick goop. That one he was showing was the MG 8420 ($27.78 on Amazon). Caig also has the CircuitWriter CW100P for $20.34.
From: mailto:PolySix@yahoogroups.com Sent: Thursday, June 30, 2016 10:29 AM To: PolySix@yahoogroups.com Subject: Re: [PolySix] BEST Key contact repair solution? oh wow..... those are the 'whole enchilada' then?? i thought it kind of pricey just for 'dots' alone! in the tests done with weigel's 'dots' this guy 'syntegrator' on youtube found them to be inferior to the liquids... though that's just one test but makes me apprehensive... --
2016-07-01 by jw_dewdney@yahoo.com
2016-07-01 by <backshall1@bellsouth.net>
Yikes, that’s a scary way to clean those pads. They are supposed to be gold-plated, with copper underneath. Once the gold is gone they can corrode very quickly. Alcohol and cotton swabs should be sufficient to clean those pads.
From: mailto:PolySix@yahoogroups.com Sent: Friday, July 1, 2016 12:52 AM To: PolySix@yahoogroups.com Subject: Re: Re[2]: [PolySix] BEST Key contact repair solution? Thanks for the answers... tonight I may have busted an important myth... I'm kind of hoping, anyway. After looking at the copper contacts on the keybed circuit board that the 'pills' make contact with, under a very good stereo microscope - I noticed there was what looked like a significant amount of what I'd call 'varnishing' where the pills had come into contact with them. This is not visible to the naked eye - unless your eyes are a hell of a lot better than mine - which is possible.I also checked the conductivity of the 'old' carbon pills and found them all to be pretty decent - somewhere in the 70 ohm range - certainly no better than i could do with 'keypad fix' or caikote 44. So on a hunch I made a little ball of 00 grade steel wool that i held with tweezers and (through the microscope) went through and cleaned up ever copper pad so it appeared bright an shiny - WITHOUT doing any sort of reconditioning or recoating to the carbon pills themselves. Result? A full keyboard of well behaved keys!! I see no reason that it won't stay that way for a few years (depending on how the 'varnish' on the copper is created - breakdown product in the rubber pill material perhaps?). Anyway- i thought i'd share this with you - also a nice solution because it costs NOTHING outside of an hour or your time.
2016-07-01 by jw_dewdney@yahoo.com
2016-07-01 by tlule@gmx.de
Agree with you.
Whatever you beleive this varnish is, it should not be there and should not be removed with steel wool whatever the grade, as steel is harder than copper and gold and may remove some of the metal.
Instead it would be Wise to first start with different organic solvents, from Alcohol, through IPA, to Acetone, to see what is needed to remove any organic layer that may be there, NaOH can also be tried since it does not aggress copper or gold.
As pointed out the contacts must be gold plated. If they are no longer gold plated, it looks like someone has removed it before you, probably with a similar brutal abrasive. And bare copper does oxidise quite rapidly
But no problem: once you have removed any organic residues, you can plate the copper with Gold again. There are kits available. Usually you start with an activator that removes oxide residues, then you apply a layer of Nickel and finally gold. All this is nowadays available for electoless plating, so no need to send a current. Once you have a new gold layer you can be sure it will last for many many more years.
Good Luck!
2016-07-01 by jw_dewdney@yahoo.com
2016-07-01 by <backshall1@bellsouth.net>
There was definitely gold on there when it was new. It may have already been scraped off by someone else many years ago. I definitely agree with using progressively stronger solvents when cleaning something like this, to see what works. I do that all the time.
From: mailto:PolySix@yahoogroups.com Sent: Friday, July 1, 2016 2:26 PM To: PolySix@yahoogroups.com Subject: Re: Re[2]: [PolySix] BEST Key contact repair solution? Agree with you. Whatever you beleive this varnish is, it should not be there and should not be removed with steel wool whatever the grade, as steel is harder than copper and gold and may remove some of the metal. Instead it would be Wise to first start with different organic solvents, from Alcohol, through IPA, to Acetone, to see what is needed to remove any organic layer that may be there, NaOH can also be tried since it does not aggress copper or gold. As pointed out the contacts must be gold plated. If they are no longer gold plated, it looks like someone has removed it before you, probably with a similar brutal abrasive. And bare copper does oxidise quite rapidly But no problem: once you have removed any organic residues, you can plate the copper with Gold again. There are kits available. Usually you start with an activator that removes oxide residues, then you apply a layer of Nickel and finally gold. All this is nowadays available for electoless plating, so no need to send a current. Once you have a new gold layer you can be sure it will last for many many more years. Good Luck!
2016-07-02 by simon
for cleaning contacts, i use a regular pencil eraser. preferably the red part, and if very dirty, a soft touch with the blue coarser part. works like a charm. simon On 30-06-16 02:02, jw_dewdney@yahoo.com [PolySix] wrote: > I asked this over in the mono/poly group but got no responses - so I > thought I'd try my luck here. I was reading a blog where someone > recommended AGAINST CaiKote 44 in favor of someone's proprietary stick > on 'dots'... having just received some CaiKote - i'm wondering if anyone > would caution against this due to poor longevity (?) > > > -- Met vriendelijke Groet, Simon Claessen drukknop.nl