Here is a video showing you my technique for making a D6 concertina reed. These reeds are pretty high, and pretty obnoxious to make, definitely a little trickier to make than the lower reeds in the instrument. Thanks for watching!
Make the gap between the reed shoe and tongue 0.05mm all around. easiest way is to build a jig from 0.05mm shims and lay the shoe in the jig with the shims inside sticking out in front, front sides and back sides and then pushing the tongue trough inside to fit in the shoe reed chamber. the gaps is all the same for all the shoe sizes. just need to make templates for all shoe sizes. Hope this helps you.
I make a reading of all the reeds in place in the instrument, then tune them on a low-pressure vacuum jig I made specially for tuning concertina reeds. I tune them relatively, so if it's 5 cents flat in the instrument, I lower the pitch of the reed 5 cents on the tuning jig relative to where it started on the jig, if that makes sense.
@@CrookConcertinas Scientific analysis, (not trying to be "clever" here, okay, just saying) sows that a reed that operates in a region between atmospheric pressure and a pressure slightly higher than atmospheric will resonate at a different frequency than the same reed operating in a region between atmospheric pressure and a pressure slightly lower than atmospheric pressure. It just means the same reed will have a different resonant frequency in a different pressure region. That is the reasons why the frequence of a reed change from start to end. But not too much though. Any way I have a bellows to finish... chat later again. I hope you see the message I posted about using AI for calculations. I use it as a reference for the thickness to get to the target frequence, obviously it does not remove the need for filing.
