[ Ed Schmidt wrote in 200506 MMDigest --

> My 20-note Hofbauer always plays one note even when the tracker bar
> is taped over.

We had that problem once with a new crank organ.  Checking revealed
nothing obvious, but dismantling the valve chest showed that the
manufacturer had allowed some glue to run down one of the valve
stems, preventing the pallet valve from closing.  Removing it fixed
the problem.

Just a thought.

David Evans