Re: [Harp-L] Re: Microfiche Reader

[George Miklas <harmonicat@xxxxxxxxx>]

Rick, that image is cool!  Thanks for sharing!

I examine reeds on a small microscope under x25 magnification to view for
cracks.  What see clearly are the deep gouges (canyon-like) from the tuning
file.  For gapping and offset, I use a light box.   I think it would be
great to use magnification in conjunction with the light box, which might
look like your microfiche view.

George


On Sat, Nov 12, 2011 at 1:45 PM, Rick Epping <rickepping@xxxxxxxxx> wrote:

> When viewing a reed in a microfiche reader, I was able to obtain the
> clearest image by giving the reed a zero offset.  While examining vintage
> reeds at Hohner in the '90s toward improving reed tooling, I placed a thin
> strip of cellophane tape near the tip of the reed to give it a zero offset,
> thereby avoiding having to permanently alter the reed's offset.
>
> Here's a link to one of the photos I took during that project:
>
>
> https://docs.google.com/document/d/19XQMIO9SXEsJDG3VWCK6A95sPyWXFk7CpQ8PCU8hSDg/edit?hl=en_US
>
> Best regards,
> Rick
>
>
> > ------------------------------
> >
> > Message: 10
> > Date: Sat, 12 Nov 2011 17:03:43 -0000
> > From: "Aongus MacCana" <amaccana@xxxxxxxxxx>
> > Subject: [Harp-L] Microfiche Reader
> > To: "'mark stafford'" <birdstafford@xxxxxxxxxxxx>
> > Cc: Harp-L List <harp-l@xxxxxxxxxx>
> > Message-ID: <000601cca15d$0a45d180$1ed17480$@net>
> > Content-Type: text/plain;       charset="us-ascii"
> >
> > Hi Mark,
> >
> > Yes the use of the microfiche reader is to show the gap all around the
> reed
> > - which it does very effectively.
> >
> > This means that you see the beneficial effects of any swaging/burnishing
> > you
> > carry out on the reedplates. It also shows any areas where there may be
> > insufficient clearance or actual interference between reed and plate.
> >
> > Microfiche readers became obsolete with the advent of the PC  and the
> > possibility of putting information on a CD which would previously have
> been
> > committed to microfilm.
> >
> > I happen to have a reader- thrown out from an office. I got it for
> reading
> > automobile workshop manuals which garages used to have on microfiche.
> Like
> > the readers the microfiche manuals also became available "on the cheap"
> > when
> > the garages discarded them.
> >
> > If you are able to get a reader at a 'garage sale' price, it will tell
> you
> > things about your harmonica that "you wanted to know, but were afraid to
> > ask"
> >
> > Beannachtai
> >
> > Aongus Mac Cana
> >
> >
> >
>