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Re: automatic oboe adjustment

Author: Chris P
Date: 2011-07-19 15:25

Adjust the ones nearest LH3 first to be sure LH3 closes the Bb pad along with it - you're best doing this while keeping the con bar wedged up from the lower end to free the Bb and C pads so you can check the adjustments on the main action easier.

While keeping the 8ve key held down, adjust the closure of LH3 along with the closure of the upper 8ve pad which is the adjusting screw at the top left as you're looking at it. Then check and adjust the closure of the lower 8ve pad when LH3 is raised with the adjusting screw on the lower 8ve key (in the middle of the instrument on the end of the rocker).

Finally check the closure of both 8ve pads when the 8ve key is released while raising and lowering LH3. There are two adjusting screws for this - the one by the lower 8ve pad adjusts the amount of double action between the 8ve key linkage and the 8ve mechanism, so leave a small amount of play in there to be sure the 8ve pads close when the 8ve key is released. The adjusting screw over on the right side regulates the closure of the upper 8ve pad along with the lower one when the 8ve key is released.

The pressure on the 8ve pads will vary slightly with the opening and closing LH3. The upper 8ve pad will have slightly more pressure than the lower one when LH3 is closed and the lower 8ve pad will have slightly more pressure than the upper one when LH3 is released.

There's very little margin for error in this type of 8ve mechanism and it also depends on the venting of LH3. So setting it up to work properly can be like chasing your own tail.

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

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