roman_sub Posted June 29, 2018 Share Posted June 29, 2018 (edited) Hi - sorry, not sure if this is the right forum. Not really an 'items wanted' - and am specifically hoping one of the basschat builders may be able to help me with a small job Basically, I would like to make a set of Acoustic Pressure Equalisers for my omni-directional microphones. Basically these would focus high frequencies somewhat and should help me record orchestras a bit better ;-) Here's a professionally made set, for a different pair of microphones: Unfortunately I can't order them directly for my set of mics, so what I am thinking of doing is: - buy 2 Delrin spheres, e.g. from here https://www.ebay.co.uk/itm/Single-Delrin-Plastic-Ball-Metric-Sizes-1mm-to-50mm/372119091645 - have a skilled member of basschat drill them (I expect this would require a drill press / forstner bit drill). Probably will need to be 40mm balls originally, with 21mm hole. I think this video shows a possibly simple way of doing it: https://www.youtube.com/watch?v=BH5CfA3NClc (optional additional steps: spray paint them black; come up with tight-fitting mechanism around edge of capsule*. something like a ring of felt seems to have been suggested on forums. But if these could be bit more fiddly so I could tackle them myself) * they need to be taken off / put on with relative ease, but need to sit very tightly around the microphone (21mm tube) - especially at the the edge, around the capsule. I will pay for balls and all postage costs, plus a fee to cover your time (hoping it wouldn't take much more than an hour for the drilling? - but do correct me... Obviously would be a bit more for spray painting and coming up with mechanism for them to fit tightly around 21mm tube - little more of an engineering challenge). Hoping this will be a small but rewarding project for someone with the right tools! Please PM me if you're interested, or just reply here for a bit of general discussion around how to do this... would be grateful for any thoughts or advice. Thanks Roman Edited June 29, 2018 by roman_sub Quote Link to comment Share on other sites More sharing options...
jebroad Posted June 29, 2018 Share Posted June 29, 2018 Not sure I’m too skilled but I’ve got a bench drill 1 Quote Link to comment Share on other sites More sharing options...
roman_sub Posted July 4, 2018 Author Share Posted July 4, 2018 pm'd and working up prototypes with mr jebroad 2 Quote Link to comment Share on other sites More sharing options...
jebroad Posted July 5, 2018 Share Posted July 5, 2018 Got a clamping jig designed and the right bit found Quote Link to comment Share on other sites More sharing options...
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