The First Linen Diaphragm
A NAPIER constructor writes: "I have made the linen-diuphragm speaker deseribed in the ‘Radio Jtecord’ and am very pleased with same. Could you inform me where I can, get a good unit for it? The one I am using is rather small'for the job." Lengthening Cone-Driving. Spindles, IIDN it is found necessary to lengthen the driving spindle of a cone until the best plan is to eut the spindle about half-way. Then roll up au strip of brass or copper foil to make au thin tube to fit over the spindle slip one piece of spindle in each end, solder up, and a good extension is the result. Keep moving parts of cone speakers as light as possible.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19280810.2.53
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Radio Record, Volume II, Issue 4, 10 August 1928, Page 29
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122The First Linen Diaphragm Radio Record, Volume II, Issue 4, 10 August 1928, Page 29
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