This article is from the Antique Radios And Phonographs FAQ, by Hank van Cleef vancleef@netcom with numerous contributions by others.
You can play 78s with a modern phonograph using a diamond needle.
If you have only a stereo stylus, you can still use it to play your
78s without hurting them. Of course, it is best to use about a 3 mil
needle made for the purpose. Modern equipment, tracking at 2 grams, is
quite gentle on records compared to the old Victors, tracking at
several ounces.
 
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