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Archive for polysix.
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2016-06-30 by jw_dewdney@yahoo.com
2016-06-30 by <tomlinson6050@roadrunner.com>
2016-06-30 by <backshall1@bellsouth.net>
BEST (NOT CHEAPEST) fix if NEW
contacts:
http://shop.lasynthco.com/product/key-contacts-for-korg-poly-oberheim-sequential-prophet-600-kawai-and-others
==================================
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"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>
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
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.Sent: Thursday, June 30, 2016 10:29 AMSubject: 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>
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.Sent: Thursday, June 30, 2016 10:29 AMSubject: 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
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.Sent: Thursday, June 30, 2016 11:53 AMSubject: 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.KJust 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.Sent: Thursday, June 30, 2016 10:29 AMSubject: 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
-----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.Sent: Thursday, June 30, 2016 10:29 AMSubject: 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...
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2016-07-01 by jw_dewdney@yahoo.com
2016-07-01 by <backshall1@bellsouth.net>
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>
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
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