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 Re: Upper join G#-A linkages
Author: Chris P 
Date:   2017-07-10 13:41

It's not always possible to make the side G#-A trill key close the LH2 fingerplate - some oboes it's easier to achieve this than other depending on the linkages.

Some oboes have a clutch on the Ab-Bb trill mechanism (the linkage from the G# key to the LH2 fingerplate) and this can be adjusted so the side key can close LH2, so long as it doesn't close the venting down or cause double action between LH2 and the C key. The clutch is usually near the LH3 fingerplate by the LH3 B-C# trill key and either has a small adjusting screw on it or is a plain clutch with no adjusting screw.

If there's no clutch and the Ab-Bb link is on a single key barrel, then it's adjusted by bending the link to make it work. That has to be done carefully as the key barrel can bend and bind on the rod screw.

It's not the end of the world if the side G#-A trill key doesn't close the LH2 fingerplate as it's not really meant to, but it is a bonus if it does - I usually aim to make it do this wherever possible.

The linkages and levers are all fairly short and movement isn't great around the G# key, so sometimes even getting enough venting on the G# pad can be a challenge.

Chris.

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 Topics Author  Date
 Upper join G#-A linkages  new
mberkowski 2017-07-10 05:19 
 Re: Upper join G#-A linkages  new
Chris P 2017-07-10 13:41 
 Re: Upper join G#-A linkages  new
Chris P 2017-07-10 14:32 
 Re: Upper join G#-A linkages  new
mberkowski 2017-07-10 15:43 
 Re: Upper join G#-A linkages  new
Chris P 2017-07-10 16:21 


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