The Talking Machine Forum — For All Antique Phonographs & Recordings

I am selling 50 French made glass diaphragms that will fit the recessed top Edison reproducers like the Automatic or the Model B. It will fit the Model C. They are just over .008 thick. I will sell them for $100 plus shipping, that is $2 each plus shipping for all 50. If you use them in the recessed top reproducers where the top has the notch for the centering pin use a thin gasket so you do not break the diaphragm.

I purchased 80 of these back in 2013, I used to use them on a regular basis. I have included photos, any questions please let me know.

Original glass diaphragms used in Edison reproducers and recorders were .006" thick

The diaphragms are sold.

These are thicker that what Edison's factory produced, that is why I noted the thickness. I purchased them from Larry Hawes before Norm made the ones around .006 thick.

Edison glass diaphragm thickness varied. The glass diaphragms on Automatic 144,269 and 97,048 are .0063 thick. .0058 is the other measurement I have on these. 57509 is right at .007. 173,106 is .0064. 134,190 is .0065. Unfortunately until I purchased my micrometer I did not measure the thickness. My micrometer was calibrated at work so it is accurate.