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Re: baffling EH problem

Author: oboe1960
Date: 2007-01-07 15:51

Chris P wrote:

> On some student cors (as in Howarth S20 and S40 cors) it's a
> simpler mechanism where the F vent is held closed by a flat
> spring, and is held open by both RH finger 2 and 3 touches -
> it's only closed when both RH 2 and 3 are closed at the same
> time.

This is the mechanism I must have, since it operates just as you say and the vent has a flat spring.

>
> With just the bottom joint, close the fingerplates and see if
> the F vent (under the pinky cluster) can be lifted - if it can
> and the spring feels strong (about as strong as the Eb key),
> then it's OK. If it can't be lifted at all then it's still OK.
> But if it can be lifted and feels light, or doesn't close when
> both RH fingers 2 and 3 are down then this is where you're
> having your trouble.

No, this vent is nice and tight...

>
> Another area that can cause trouble is the adjustments on the
> top joint main action - LH 3 closes the Bb and C vent together,
> and LH 2 only closes the C vent.

That's funny-- the LH 2 doesn't close anything on my EH--- just the key itself.

>
> When you stop the bottom joint and blow into it, does it make a
> 'flapping' or a loud hissing sound as if a pad is being blown
> open or leaking?

No- the joint seems to be sealing well; if it leaks, it must be a very small amount since I don't notice it.

There is another vent on the lower joint that is operated by the RH2 and RH3. It appears to be somewhat light, especially when operated by the RH3. I would like to try adjusting it, but there are 4 screws associated with this one stinkin' key and I'm not sure one to try.

I really appreciate your time spent trying to help me out. Although there is no substitute for the qualified technician, I also think that we oboists should learn the basic adjustments on our instruments, since they seem to get out of whack with alarming frequency, over nothing! I have just begun this hard task, since I just got another oboe and can now use my old Loree as a "guinea pig" without being left with an unplayable instrument. So far the results are mixed.

I am using Patrick McFarland's Oboe Adjustment guide. Does anyone have a favorite guide of their own?

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