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Re: Low B-C linkage adustment

Author: Chris P
Date: 2017-03-20 03:05

Unless you know exactly which screws do what, don't adjust anything if you're not sure what they do.

The one on the lower end of the Eb pad cup links it to the C key so it can be closed fully by the C key.

The one that sits above the flat spring is to regulate the amount of free play in the feather keys - there has to be some free play between the flat spring and that screw to be sure the Eb pad cup isn't being held open.

The other one at the end of the feather keys is to synchronise the movement of the low B key and the bell key linkage - this can be a tricky thing to adjust on oboes with a low Bb bell vent as the bell key will have to be adjusted correctly which takes some doing to set up well (this involves bending the bell key but making sure the key barrel and rod screw aren't bent).

The one on the C# pad cup is similar to the one on the Eb pad cup, but in this instance it's there to allow the low B key to close the C# pad fully when doing a low B-C# slur or trill.

You can only check the C-Eb linkage by holding the LH Eb key down and closing the C key and checking both pads close together.

Similarly with the low B-C# linkage - hold the RH C# key down and the LH B key will close the C# pad.

Always use the touchpieces to operate (close) the keys when making adjustments instead of closing them by the pad cups as the amount of torsion will be different if the pad cup is closed directly or remotely. Set them up as you'd play them.

The B-C link and low B-Bb can only be checked and adjusted by using the touchpieces.

On cors as the keywork is so long, you can check the C-Eb adjustment by holding down the LH Eb linkage down onto the flat spring and close the low C key with the one hand as you're checking the pads with a feeler gauge in the other - just like soldering, we really need three hands when adjusting oboes or cors.

Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.

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Date

Low B-C linkage adustment new

Barry Vincent

2017-03-19 07:39