Re: [Harp-L] Help with Chromatic repair

[Music Cal <macaroni9999@xxxxxxxxx>]

Is the CX12 comb the only major manufacturer comb made of ABS? Are all
other plastic combs acrylic? Kind of odd given that acrylic is rather
brittle compared to ABS. Anybody know what drives the decision to use
acrylic?


On Fri, Jan 17, 2014 at 2:28 PM, George Miklas <harmonicat@xxxxxxxxx> wrote:

> from http://plastics.dupont.com/plastics/pdflit/americas/delrin/H76836.pdf
>
> Delrin Properties and Characteristics
>
> The chemical composition, regular molecular- structure and high degree of
> crystallinity result in a unique combination of outstanding characteristics
> of Delrin® acetal resins not found in metals or most other plastics:
>
>    -
>
>    High mechanical strength and rigidity
>     -
>
>    Toughness and high resistance to repeated impacts
>     -
>
>    Long-term fatigue endurance
>     -
>
>    Excellent resistance to moisture, gasoline, solvents, and many other
>    neutral chemicals
>     -
>
>    Excellent dimensional stability
>     -
>
>    Good resilience and resistance to creep
>     -
>
>    Natural lubricity
>     -
>
>    Wide end-use temperature range
>
>
> On Friday, January 17, 2014, Music Cal <macaroni9999@xxxxxxxxx> wrote:
>
>> Hi George
>>
>> Plastic replacement combs for a 10 holer? Fantastic! Please keep me
>> informed.
>>
>> Hohner combs only?
>>
>> I don't know anything about delrin. What useful properties does it have as
>> a comb material?
>>
>> MusiCal
>>
>>
>> On Thu, Jan 16, 2014 at 1:36 PM, George Miklas <harmonicat@xxxxxxxxx>
>> wrote:
>>
>> > Rivet holes in wind savers: Have you replaced rivets with screws or
>> > screws/nuts?  You should not need to punch holes for any other reason.
>> >
>> > Broken wood combs:  Everybody has a method of repairing wood chromatic
>> > combs.  Or you can replace the comb with plastic.  Later this year, I
>> > will to begin production of the Miklas Lifetime Comb to replace wood and
>> > aluminum chromatic combs in 10, 12, 14, and 16 hole models.
>>  Individually
>> > milled from solid ABS, Delrin, or Acrylic, with threaded metal inserts
>> so
>> > that reed plates and cover plates can be removed individually. More
>> > information will be made available as it develops on my website:
>> > http://HarmonicaGallery.com/repair
>> >
>> > George
>> >
>> > On Thursday, January 16, 2014, harp <harp@xxxxxxxxx> wrote:
>> >
>> > > Dear Harp-L,
>> > >
>> > > I have always played the diatonic harp, but have been curious about
>> the
>> > > chromatic.  I recently purchased a couple of older Hohner Chromonicas
>> –
>> > one
>> > > is a 10-hole, and the other is a “super” 12 hole.  Both have wood
>> combs,
>> > > and both are in need of maintenance.  I regularly work on my
>> diatonics,
>> > but
>> > > I have never had a chromatic before, so I am jumping right into the
>> deep
>> > > end of the swimming pool and am going to do some work on these to see
>> if
>> > I
>> > > can make them fully functional.  But I need some help/parts.
>> > >
>> > > I have already cleaned them up some, and I have opened up the gap on
>> some
>> > > reeds that were choking and have “ironed out” a reed that had been
>> bent.
>> > >  100% better already, but I still have a long way to go.  Here are the
>> > > issues where I could use some advice:
>> > >
>> > > -  Both harps have broken combs.  The Super has a vertical crack on
>> the
>> > > 10-hole that is between 1/16” and 1/8” wide.  This means that both the
>> > > upper and lower reeds of hole 10 play regardless of where the slide is
>> > > positioned.  The 10-hole Chromonica also has a vertical crack in the
>> > comb,
>> > > but it is not at all as bad, and it does not seem to leak enough air
>> > > between the upper and lower chambers to affect how it plays.  Does
>> anyone
>> > > have any recommendations on repairing the comb?  I can think of
>> several
>> > > ways to go about it, but I thought I would ask the group first.
>> > > -  Of course, the windsavers are shot.  Should I just buy the
>> windsavers
>> > > from Hohner (currently out of stock – anyone have some they would
>> like to
>> > > sell?)
>> > > -  Any suggestions on how to punch rivet holes in the windsavers
>> short of
>> > > buying the $350 Hohner tool kit?
>> > > -  Does anyone have some of the slide buffers (the little pieces of
>> > > plastic tubing that cover the mouthpiece screws)?
>> > >
>> > > Thank you very much,
>> > > Brad
>> > >
>> >
>> >
>> > --
>> >
>> >    - *GEORGE MIKLAS,* Harmonica Performing Artist and
>> > Entertainer<http://harmonicagallery.com/>
>> >
>> >    - *THE HARMONICA WIZARD MARCH* by John Philip
>> > Sousa<http://harmonicagallery.com/sousa>
>> >
>> >    - *HARMONICA REPAIR* Done Right by George<
>> > http://harmonicagallery.com/repair>
>> >    - *HOHNER <http://us.playhohner.com/>*
>> > *HARMONICAS*<http://us.playhohner.com/>*...Just
>> >    Breathe* <http://us.playhohner.com/>
>> >    - *SPAH *- *S*ociety for the *P*reservation and *A*dvancement of the
>> *H*
>> >    armonica, <http://spah.org/>
>> >       - *a non-profit, membership organization dedicated to serving the
>> >       harmonica community. <http://spah.org/>*
>> >
>>
>
>
> --
>
>    - *GEORGE MIKLAS,* Harmonica Performing Artist and Entertainer<http://harmonicagallery.com/>
>
>    - *THE HARMONICA WIZARD MARCH* by John Philip Sousa<http://harmonicagallery.com/sousa>
>
>    - *HARMONICA REPAIR* Done Right by George<http://harmonicagallery.com/repair>
>    - *HOHNER <http://us.playhohner.com/>* *HARMONICAS*<http://us.playhohner.com/>*...Just
>    Breathe* <http://us.playhohner.com/>
>    - *SPAH *- *S*ociety for the *P*reservation and *A*dvancement of the
>    *H*armonica, <http://spah.org/>
>    - *a non-profit, membership organization dedicated to serving the
>       harmonica community. <http://spah.org/>*
>
>
>
>