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

[Jay Schwichtenberg]

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
>
>