Duaine queried: > In the old Edison phonographs, what was the vibrating diaphragm made of ? > > Duaine I don't know about Edisons, but in my Victrola it's mica. You can see a little bit of cracking by where the needle arm attaches to the diaphragm. Disclaimer for those picky folks out there (you know who you are): It won't play very well as pictured. I had to swing it to that position to get the picture. Conrad Hoffsommer -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100925/eeea5828/attachment-0001.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: P1020297.JPG Type: image/jpeg Size: 147340 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100925/eeea5828/attachment-0001.jpeg>
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