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From: cryforhelp
Date: Thu, 17 Oct 1996 00:23:29 -0700
Subject: Re: tone (was breathing)

Mike Curtis wrote:
>

> No need to search the archives for valving information - here 'tis once
> again. diatonic harps>

My chromatic (Super 64) has more complex valves than the ones you
describe/prescribe for the diatonic. They are all doubled, i.e. each
valve is actually a pair of thin polymer flaps slightly larger than the
reed slot. On the intermediate holes both elements of the pair are
simple, flat pieces with the top piece about 2 - 3 mm shorter than the
lower piece.

But the valves on the lowest two holes are different. There the lower
flap element appears to be a vacuum-formed elongated cup, it actually
stands proud of the reed plate by about 1 mm. This forming actually
occurs over only about 1/2 of the lower flap's length, from the open end
back toward the gluing point. The rest of the way to the gluing point
it is just a simple flat piece of material. And over that 1/2 length
where it is flat rests the upper flap, also a simple flat piece of
material, but which is trimmed on the diagonal at its open end. It
extends from the common glue point just up to the point where the lower
flap begins to cup upward.

Does any of this valve complexity matter? You describe simple,
monolithic, all-flat valves. Does doubling help, does forming the
valves into cups help, is this some special magic Hohner patent? Or is
it something which is of value but only in big chromatics?

- --cryforhelp--

TFTD: Sure you trust your mother, but you cut the cards anyway.