Pete Dunk Posted August 28, 2007 Share Posted August 28, 2007 I need to replace all of the springs in a 48 key Wheatstone concertina because they have become weak and some even have trouble exerting sufficient force to seal the pads properly. I've bought the springs and I'm ready to go but I have no idea how to go about setting the springs to give a fairly uniform tension of around 60g force throughout the instrument. Obviously the longer levers will overcome the spring pressure much more easily than the shorter ones so I assume that some kind of force meter is required in order to ensure that the keys have a uniform response. I googled around a bit and was alarmed by the cost of proper test instuments. So is there a simple method of setting spring tension? Is there some simple device I can cobble together myself that will give me a near enough indication without resorting to laboratory test kit? Quote Link to comment Share on other sites More sharing options...
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