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RE: Tricky key binding problem

Author: Gordon (NZ)
Date: 2002-09-28 05:14

Sometimes in the region where the E/B & F#/C# levers mmet their respective keys, one binds against the other, sometimes only as they pass eachother, so that E/B briefly opens F#/C3. some judicious bending solves the problem. Also, there is sometimes a problem of the lever-key linkage itself binding so that the F#/C# key does not close reliably. Some rather tricky minor bending is usually requited.

Now for an extremely common problem - the left E/B does not work as well as the right E/B. This is a symptom of any of many problems in this area. Most maladjustment shows up more with the left than the right because the right fingering has a tendency to press down on the E/B upper pivot whereas the left has a tendency to lift up (away from the body).

The problems that produce this symptom include a loose post, sloppy pivot, poorly seated F/C &/or E/B pad (usually closing harder at the 'back' than at the front), poorly adjusted crowsfoot linkage between E/B and F/C. All but the first one of these are common with brand new instruments, even from top makers. The poor seating is almost universal on new instruments.

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