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Very odd valves in otherwise nice anglo

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4 hours ago, Theo said:

I knew that the Dippers sometimes used valve helper springs on larger reeds, and I've sometimes done the same myself.  The concertina I'm posting about has them on every valve right up to the highest pitches, even the top few that probably don't need any valves.  A quick experiment shows that if I lift a valve while the reed is sounding there is an obvious increase in volume.


I've done the opposite too. On my Dipper there was one note which was obviously sounding louder than the adjacent notes, but otherwise responding very well. Replacing the vinyl spring with a slightly longer narrow strip cut from a vinyl melodeon valve did the trick and the note now sounds balanced with its neighbours.   

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