Mica diaphragm w/ metal rim
Posted: Thu Jun 11, 2009 4:59 am
A few months back I got a bunch of NOS diaphragms of off eBay, mostly "Quaker" but some were in a plain envelope, no brand
One was a conventional mica, fitting to a No4 soundbox, but with a metal rim around it.
The rim was clearly factory-mounted.
Any clues, common knowledge? I haven't seen one before. Any ideas of the use?
One was a conventional mica, fitting to a No4 soundbox, but with a metal rim around it.
The rim was clearly factory-mounted.
Any clues, common knowledge? I haven't seen one before. Any ideas of the use?
- metal_rim_mica_no4.JPG (24.05 KiB) Viewed 799 times