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Chris Ghent

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About Chris Ghent

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    Heavyweight Boxer

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    http://www.concertina.com.au
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    Blue Mountains NSW

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  1. It may be the clearances are less tight on the higher reeds. Also, I’m not sure how the chamber works on these hybrids, but if there is one I would experiment with making it smaller.
  2. Good tip Frank! I find using very little glue to hold down the chamois between the bellows frames and the reed pan makes it easier to lift a section and pack it with cardboard under the chamois if the fit is not perfect.
  3. Something to watch for is when you clean up the side of a reed created with a shear; if you do not hold the file exactly square to the side you may leave the surface which will be the bottom of the reed slightly narrower than the top. When you profile the reed you will then be making the clearance wider. An easy (but second best, best is to file it square) way to deal with this is to deliberately create a blank in which the top is narrower than the bottom. I am only talking a thou or so. The clearance at the bottom will not change when you remove material from the top. Using
  4. I know Geoff, he visited here about 15 years ago. He loves to talk about making concertinas and it is all interesting. On the experimental reeds I am not talking about creating any extra clearance or wider gap. Leaving those reeds aside and talking about every day reeds, it sounds like you do similar things to me on the underside, on the top side I hit it a little harder, but yes, I’m talking microscopic.
  5. There seemed to be no difference in response; I’ll see if I can dig the reeds out, I think I saw them sometime in the last year. I could even send them over to you, might save some time for you. I think there was no difference in response because the response is affected by the clearance and this clearance was not changed, just the lead up to the “compression” point and the ramp down were less aggressive.
  6. Jake, I am not wedded to the idea that reeds need to have a precise bottom edge. I certainly round the top edge but that is a defence against burrs which don’t have to be very large at all to hit the frame. The bottom edge I take the sharpness off. What are your thoughts? Some time ago I made a couple of reeds which were intended to have no sharp edges, they were akin to an ellipse shape but with a flattened bottom. The frame was also rounded over so the tightest point of clearance was .5mm from the top of the frame. So a rounded edge reed was passing through a rounded edge frame, but
  7. Hook action was driven by ease of assembly and economics rather than quality.
  8. A rough and ready confirmation of reed travel beyond the bottom of the frame; blow through a hand held reed and put your finger behind it and you will be able to feel the reed hitting your finger.
  9. As time goes by BA threads become less available. There is a convention even (2,4,6,8) sizes are preferred and things can be more available in those sizes. 6BA is a good solid bolt but the heads of the bolts cannot be very large or they look out of place on a concertina. When bolt heads are about the right size it leaves very little shoulder under the head to bear down on the end. This will be OK if the holes are tightish to the shaft, but if anyone overdoes the torque on the bolt then the lack of square area under the head means it is bearing down with a lot of force and can impact on the w
  10. People with few resources who managed to keep instruments playing despite the odds always have my respect. I have seen a few things like this from South Africa, though maybe that is just the 8 fold bellows leading me astray.
  11. Even if there was such a thing as a standard Lachenal reedpan, unless the newer instrument was a direct copy of the Lachenal you got the reedpans from, you would need to remake the action as well. Would it be possible to move as many reeds as possible to more correct positions and get the original maker to remake the missing ones? Or perhaps a reedmaker who does repairs could do it.
  12. I know him well, he lives in Sydney, Australia. I’ll draw his attention to this thread but I’m not sure whether he will respond.
  13. There is no reason I can think of why either reed type should go out of tune more quickly than the other.
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