[sdiy] Help! What protective coating on older Buchla touch keyboards

[Dave Manley]

Is it nothing more than soldermask?

-Dave

-------- Original Message --------
 From: Jay Schwichtenberg <jays at aracnet.com>
 Sent: Tue, Nov 13, 2012 07:30 PM
 To: 'SDIY' <synth-diy at dropmix.xs4all.nl>
 CC: 
 Subject: Re: [sdiy] Help! What protective coating on older Buchla touch	keyboards

>Dave,
>
>I was wondering about something simular. I have some clear, matt (dull surface) contact paper (adheasive on one side) that is used to cover photos, posters and things like that. While it would wear out after a while at least it would be replacable.
>
>Might see if Mark Verbos might know what the coating is on the keyboards. He has done a lot of restore work and cloning of Buchla gear.
>
>Jay S.
>
>-----Original Message-----
>From: Dave Leith [mailto:dave.leith at gmail.com] 
>Sent: Tuesday, November 13, 2012 6:05 PM
>To: jays at aracnet.com
>Cc: SDIY
>Subject: Re: [sdiy] Help! What protective coating on older Buchla touch keyboards
>
>Thanks for the replies.
>
>Yes, it does seem to be very hard and like an epoxy and I would like
>to "paint once calibrate twice" rather than have to try and remove a
>wrong material which would probably be impossible. I am almost
>wondering if something like a baked on lazertran (for doing front
>panels)  might be a good substitute. A sheet of overhead slide
>transparency seems to have the right characteristics and gives both a
>good sensitivity and triggering.
>
>I wonder if any of the Buchla experts knows the answer.
>
>Dave
>
>On Mon, Nov 12, 2012 at 11:39 AM,  <jays at aracnet.com> wrote:
>> To me it seems more like some form of resin/epoxy. On the 112 that I
>> have (in the process of being refurbished) it looks to be something that
>> is about 1/32 to 1/16 thick and is solid.
>>
>> Jay S.
>>
>>
>> On Mon, 12 Nov 2012 09:58:54 -0800, Dave Leith <dave.leith at gmail.com>
>> wrote:
>>> Does anyone know what coating was painted over an older Buchla Touch
>>> Keyboard (like the 216 or 112)?
>>>
>>> The circuit seems to be sensitive to what material was used. Too thick
>>> is OK for pressure sensitivity but poor for triggering, no coating has
>>> good triggering but no real finger pressure range.
>>>
>>> Thanks Dave
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>>
>
>
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