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Doublereed Archive - Posting 000042.txt from 2007/04
From: "Angela Wells" <oneflute1oboe@-----.com>
Subj: RE: [DR-L] Oboe's forked F-Day 2
Date: Fri, 06 Apr 2007 16:51:12 -0400
Hello Phil and List,
>But I do think that it is still true that this screw can affect the opening
>height of the F resonance key, at least to the extent that the lower screw
>allows play in the E key before engaging the F-resonance. I'm guessing it
>does not effect F-resonance closure, as the spring in the D key ensures
>that there will be pressure to close, no matter the adjustment of the
>"upper" F-resonance adjusting screw, yes?
Yes.
And it does affect the opening of the F resonance key, but only as a side
effect of using it to get rid of play between D and little F (the key that
closes with D) or E and F. The little F key should begin to close at the
exact moment that you begin to close D or E. If they don't, you turn that
screw. If they do, you don't turn that screw, no matter what the F resonance
key opening is.
>I could see where pad thickness of the D would also affect the opening
>height of the F-resonance. But wouldn't changing this also change the
>tuning of E, as well as throw off the other relations described?
Yes, it would change the tuning of E. Other than that, all you would have to
fix is the regulation of the D to little F, to make sure the two pads still
contact their tone holes at the same time. It wouldn't create any more play
in any of the keys.
I don't have enough experience to say whether or not you would actually
change the thickness of the D pad as a last resort to get a higher-lifting F
resonance key. It could be a correct solution if your E was also flat (and
no keys were bent and the C# was setting the E key to the prescribed proper
opening and there was no play between D, E, and F), or if the existing pad
was abnormally thick. Since the D key has that big ol' hole in it anyway,
changing the pad thickness might not affect the tuning of E as much as
expected.
To fix forked F, the first thing I would check would be the opening of the
D, E, F, and F resonance keys, as controlled by the C# key.
>I'm not a repair tech, just a do-it-yourselfer/tinkerer, and greatly
>appreciate corrections and shared knowledge.
Thanks Phil. I don't mean to sound harsh or condescending- I just get
excited about jumping up on the oboe repair soapbox. Your observations are
always very well thought out.
~Angela
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