Synth-DIY Yahoo! Groups Archives

Thread

key contacts

2009-06-04 by wasteking1

i have cleaned the key contacts on my polysix  probably 4 or 5  times even using diffrent solvents at times. I always get everything back and everything is fine , then after some storage  time  some keys stop again ...i can get them back by  fast repeated pressing and then they work fine for the playing session, but some of the contacts loose it over storage again. I wonder id the problem is NOT in the cleaning , but something else. How can they get so dirty so fast? Can they oxidize overnight?  or is the problem one of alignment of the disks or the stiffenning of the rubber  contact holder?  this is frustrating and just doecnt make sense as a cleaning issue.. the principle is very basic, 2 conductive pieces touch ---and they DO WORK, just sluggish to respond.

Re: [PolySix] key contacts

2009-06-04 by Gil Sicuro

I Had this problem with my Jupiter-6. I used a potentiometer cleaning spray and also a very fine sandpaper on the most oxidated contacts. So far so good.

cheers




________________________________

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From: wasteking1 <wasteking1@yahoo.com>
To: PolySix@yahoogroups.com
Sent: Thursday, June 4, 2009 8:05:10 AM
Subject: [PolySix] key contacts

i have cleaned the key contacts on my polysix  probably 4 or 5  times even using diffrent solvents at times. I always get everything back and everything is fine , then after some storage  time  some keys stop again ...i can get them back by  fast repeated pressing and then they work fine for the playing session, but some of the contacts loose it over storage again. I wonder id the problem is NOT in the cleaning , but something else. How can they get so dirty so fast? Can they oxidize overnight?  or is the problem one of alignment of the disks or the stiffenning of the rubber  contact holder?  this is frustrating and just doecnt make sense as a cleaning issue.. the principle is very basic, 2 conductive pieces touch ---and they DO WORK, just sluggish to respond. 

[Non-text portions of this message have been removed]

RE: [PolySix] key contacts

2009-06-04 by Andrew Jury

Hi,

 

There are a couple of things I have noticed which improves the longevity of
a Polysix key contacts repair, without going to the lengths of covering
everything in silver foil.

 

1.       Make sure the gold contacts on the base PCB are clean and free from
any of the lacquer which was used in the factory to treat the green side of
the board. I have found that sometimes after handling this can get onto the
contacts and cause problems.

2.       When you clean the black carbon contacts on the rubber pads make
sure the finish on them is mat black with no 'imprint' of the tracks which
they touch when depressed.

3.       I always use the following solvent which has very good electrical
properties creates a good anti-oxidizing seal: Mykal DSI5000CCP.
http://www.mykal.co.uk/pages/electrical_cleaning_contact_cleaner_protector.h
tm. I am assuming they sell this or something similar in the US.

 

Being meticulous when servicing the keyboard is the most important thing!

 

Cheers,
Andy

Show quoted textHide quoted text

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
wasteking1
Sent: 04 June 2009 12:05
To: PolySix@yahoogroups.com
Subject: [PolySix] key contacts

i have cleaned the key contacts on my polysix probably 4 or 5 times even
using diffrent solvents at times. I always get everything back and
everything is fine , then after some storage time some keys stop again ...i
can get them back by fast repeated pressing and then they work fine for the
playing session, but some of the contacts loose it over storage again. I
wonder id the problem is NOT in the cleaning , but something else. How can
they get so dirty so fast? Can they oxidize overnight? or is the problem one
of alignment of the disks or the stiffenning of the rubber contact holder?
this is frustrating and just doecnt make sense as a cleaning issue.. the
principle is very basic, 2 conductive pieces touch ---and they DO WORK, just
sluggish to respond. 

[Non-text portions of this message have been removed]

RE: [PolySix] key contacts

2009-06-04 by Arturo Brisindi

What about Caig Deoxit? would that work? it works perfectly for my crackly pots. I just used the trusty eraser on the contacts method. it works ok, but they usually go bad after a few weeks/months of sitting dormant.

============================================ 
Arturo Brisindi

my dad vs yours 
www.mydadvsyours.com 

the gallery recording studio 
ottawa ontario 
www.myspace.com/galleryrecording



> To: PolySix@yahoogroups.com
> From: andy@networkjabber.com
> Date: Thu, 4 Jun 2009 17:55:15 +0100
> Subject: RE: [PolySix] key contacts
> 
> Hi,
> 
>  
> 
> There are a couple of things I have noticed which improves the longevity of
> a Polysix key contacts repair, without going to the lengths of covering
> everything in silver foil.
> 
>  
> 
> 1.       Make sure the gold contacts on the base PCB are clean and free from
> any of the lacquer which was used in the factory to treat the green side of
> the board. I have found that sometimes after handling this can get onto the
> contacts and cause problems.
> 
> 2.       When you clean the black carbon contacts on the rubber pads make
> sure the finish on them is mat black with no 'imprint' of the tracks which
> they touch when depressed.
> 
> 3.       I always use the following solvent which has very good electrical
> properties creates a good anti-oxidizing seal: Mykal DSI5000CCP.
> http://www.mykal.co.uk/pages/electrical_cleaning_contact_cleaner_protector.h
> tm. I am assuming they sell this or something similar in the US.
> 
>  
> 
> Being meticulous when servicing the keyboard is the most important thing!
> 
>  
> 
> Cheers,
> Andy
> 
>  
> 
>  
> 
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> wasteking1
> Sent: 04 June 2009 12:05
> To: PolySix@yahoogroups.com
> Subject: [PolySix] key contacts
> 
>  
> 
> 
> 
> 
> 
> 
> i have cleaned the key contacts on my polysix probably 4 or 5 times even
> using diffrent solvents at times. I always get everything back and
> everything is fine , then after some storage time some keys stop again ...i
> can get them back by fast repeated pressing and then they work fine for the
> playing session, but some of the contacts loose it over storage again. I
> wonder id the problem is NOT in the cleaning , but something else. How can
> they get so dirty so fast? Can they oxidize overnight? or is the problem one
> of alignment of the disks or the stiffenning of the rubber contact holder?
> this is frustrating and just doecnt make sense as a cleaning issue.. the
> principle is very basic, 2 conductive pieces touch ---and they DO WORK, just
> sluggish to respond. 
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> ------------------------------------
> 
> PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6Yahoo! Groups Links
> 
> 
> 

_________________________________________________________________
Create a cool, new character for your Windows Live� Messenger. 
http://go.microsoft.com/?linkid=9656621

[Non-text portions of this message have been removed]

RE: [PolySix] key contacts

2009-06-04 by Oliver Fairhall

Hey, god tips. I have found that my contacts are usually not to blame,
as they work just fine without the keys in place, just playing pads to
tracks. I have mechanical issues with the keyboard itself. I remember
reading about at least one other member who has had similar issues. I've
not tracked down the cause yet. I have to push the keys really far down
to get the rubber pad to contact the tracks.

Show quoted textHide quoted text

On Thu, 2009-06-04 at 17:55 +0100, Andrew Jury wrote:
> Hi,
> 
>  
> 
> There are a couple of things I have noticed which improves the longevity of
> a Polysix key contacts repair, without going to the lengths of covering
> everything in silver foil.
> 
>  
> 
> 1.       Make sure the gold contacts on the base PCB are clean and free from
> any of the lacquer which was used in the factory to treat the green side of
> the board. I have found that sometimes after handling this can get onto the
> contacts and cause problems.
> 
> 2.       When you clean the black carbon contacts on the rubber pads make
> sure the finish on them is mat black with no 'imprint' of the tracks which
> they touch when depressed.
> 
> 3.       I always use the following solvent which has very good electrical
> properties creates a good anti-oxidizing seal: Mykal DSI5000CCP.
> http://www.mykal.co.uk/pages/electrical_cleaning_contact_cleaner_protector.h
> tm. I am assuming they sell this or something similar in the US.
> 
>  
> 
> Being meticulous when servicing the keyboard is the most important thing!
> 
>  
> 
> Cheers,
> Andy
> 
>  
> 
> 
> 
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> wasteking1
> Sent: 04 June 2009 12:05
> To: PolySix@yahoogroups.com
> Subject: [PolySix] key contacts
> 
>  
> 
> 
> 
> 
> 
> 
> i have cleaned the key contacts on my polysix probably 4 or 5 times even
> using diffrent solvents at times. I always get everything back and
> everything is fine , then after some storage time some keys stop again ...i
> can get them back by fast repeated pressing and then they work fine for the
> playing session, but some of the contacts loose it over storage again. I
> wonder id the problem is NOT in the cleaning , but something else. How can
> they get so dirty so fast? Can they oxidize overnight? or is the problem one
> of alignment of the disks or the stiffenning of the rubber contact holder?
> this is frustrating and just doecnt make sense as a cleaning issue.. the
> principle is very basic, 2 conductive pieces touch ---and they DO WORK, just
> sluggish to respond. 
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> ------------------------------------
> 
> PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6Yahoo! Groups Links
> 
> 
>

RE: [PolySix] key contacts

2009-06-04 by Andrew Jury

The product I mentioned is almost like an electrical switch cleaner with a
very, very light lubricant in it. This is what keeps the oxidization away. I
had a look at the CAIG website and it looks like their FaderLube product,
but you might have to take some advice from the manufacturer on this. I
don't like the eraser method personally, I always try and use solvents! I
type so many mails these days I would have no idea what to do with the other
end of the pencil!

Cheers,
Andy

Show quoted textHide quoted text

-----Original Message-----
From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
Arturo Brisindi
Sent: 04 June 2009 18:12
To: polysix@yahoogroups.com
Subject: RE: [PolySix] key contacts


What about Caig Deoxit? would that work? it works perfectly for my crackly
pots. I just used the trusty eraser on the contacts method. it works ok, but
they usually go bad after a few weeks/months of sitting dormant.

============================================ 
Arturo Brisindi

my dad vs yours 
www.mydadvsyours.com 

the gallery recording studio 
ottawa ontario 
www.myspace.com/galleryrecording



> To: PolySix@yahoogroups.com
> From: andy@networkjabber.com
> Date: Thu, 4 Jun 2009 17:55:15 +0100
> Subject: RE: [PolySix] key contacts
> 
> Hi,
> 
>  
> 
> There are a couple of things I have noticed which improves the longevity
of
> a Polysix key contacts repair, without going to the lengths of covering
> everything in silver foil.
> 
>  
> 
> 1.       Make sure the gold contacts on the base PCB are clean and free
from
> any of the lacquer which was used in the factory to treat the green side
of
> the board. I have found that sometimes after handling this can get onto
the
> contacts and cause problems.
> 
> 2.       When you clean the black carbon contacts on the rubber pads make
> sure the finish on them is mat black with no 'imprint' of the tracks which
> they touch when depressed.
> 
> 3.       I always use the following solvent which has very good electrical
> properties creates a good anti-oxidizing seal: Mykal DSI5000CCP.
>
http://www.mykal.co.uk/pages/electrical_cleaning_contact_cleaner_protector.h
> tm. I am assuming they sell this or something similar in the US.
> 
>  
> 
> Being meticulous when servicing the keyboard is the most important thing!
> 
>  
> 
> Cheers,
> Andy
> 
>  
> 
>  
> 
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf
Of
> wasteking1
> Sent: 04 June 2009 12:05
> To: PolySix@yahoogroups.com
> Subject: [PolySix] key contacts
> 
>  
> 
> 
> 
> 
> 
> 
> i have cleaned the key contacts on my polysix probably 4 or 5 times even
> using diffrent solvents at times. I always get everything back and
> everything is fine , then after some storage time some keys stop again
...i
> can get them back by fast repeated pressing and then they work fine for
the
> playing session, but some of the contacts loose it over storage again. I
> wonder id the problem is NOT in the cleaning , but something else. How can
> they get so dirty so fast? Can they oxidize overnight? or is the problem
one
> of alignment of the disks or the stiffenning of the rubber contact holder?
> this is frustrating and just doecnt make sense as a cleaning issue.. the
> principle is very basic, 2 conductive pieces touch ---and they DO WORK,
just
> sluggish to respond. 
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> ------------------------------------
> 
> PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6Yahoo! Groups
Links
> 
> 
> 

_________________________________________________________________
Create a cool, new character for your Windows LiveT Messenger. 
http://go.microsoft.com/?linkid=9656621

[Non-text portions of this message have been removed]



------------------------------------

PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6Yahoo! Groups
Links

key contacts

2009-06-04 by wasteking1

ive tried the alcohol ...worked initially,  had better results on stubborn contacts with lighter fluid, have also tried very fine abrasive paper...all worked initially ,but only for a while...i wonder if that  "lube" might be an oxide PREVENTIVE---- indeed that might be the ticket---it makes sense.whatever new builds up (if indeed it is a build-up)  is so thin that playing the note 20 times wears it away for a while.

RE: [PolySix] key contacts

2009-06-04 by Andrew Jury

Let's put it another way. The Polysix I treated with the Mykal product I
spoke about earlier was cleaned about 9 months ago. It is played perhaps
once a week for an hour and hasn't fluffed a note since!

 

Cheers,

Andy

Show quoted textHide quoted text

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
wasteking1
Sent: 04 June 2009 21:59
To: PolySix@yahoogroups.com
Subject: [PolySix] key contacts

ive tried the alcohol ...worked initially, had better results on stubborn
contacts with lighter fluid, have also tried very fine abrasive paper...all
worked initially ,but only for a while...i wonder if that "lube" might be an
oxide PREVENTIVE---- indeed that might be the ticket---it makes
sense.whatever new builds up (if indeed it is a build-up) is so thin that
playing the note 20 times wears it away for a while. 

[Non-text portions of this message have been removed]

Re: key contacts

2009-06-16 by Robert Weigel

I'm not sure what Mykal is.  I used the stuff you mix from oakstreet I think it is, and the caig product for contacts and got skitzy results on various things.  It's a pain.  It 1) takes time to dry 2) has shelf life 3) has to be put on smoothly.  Bumps can cause skitzy behavior or just bad contacting. 

The stick on material I've been refacing contacts with overcomes all those problems completely.  Takes good close up vision I guess to precisely place the disk before you press it down.  Otherwise it's a dream.  I thought about making a tool for that and might still supply one.  I'm still trying to get quantity pricing schedule together and I'll post it on the key page on sounddoctorin.com/synthtec/parts/key.htm when I get it figured out. 

But so far I've done several polysix's and a Peavey DPM3Se and they all worked out great.  -Bob

--- In PolySix@yahoogroups.com, "Andrew Jury" <andy@...> wrote:

Show quoted textHide quoted text

>
> Let's put it another way. The Polysix I treated with the Mykal product I
> spoke about earlier was cleaned about 9 months ago. It is played perhaps
> once a week for an hour and hasn't fluffed a note since!
> 
>  
> 
> Cheers,
> 
> Andy
> 
>  
> 
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> wasteking1
> Sent: 04 June 2009 21:59
> To: PolySix@yahoogroups.com
> Subject: [PolySix] key contacts
> 
>  
> 
> 
> 
> 
> 
> 
> ive tried the alcohol ...worked initially, had better results on stubborn
> contacts with lighter fluid, have also tried very fine abrasive paper...all
> worked initially ,but only for a while...i wonder if that "lube" might be an
> oxide PREVENTIVE---- indeed that might be the ticket---it makes
> sense.whatever new builds up (if indeed it is a build-up) is so thin that
> playing the note 20 times wears it away for a while. 
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>