Art Dudly (I think) in a recent issue of Stereophile wrote all about 78s. How to play them, different labels, materials, speeds, EQs, groove widths, etc. See if you can find the article/issue as it had a wealth of information on Do's and Don'ts for 78s.
78 RPM turntable
I just recently bought a truck load of old 78s from an estate sale. I haven't had the time to even go through them yet. The ones I have are in mint condition. I mean thick records that you could hit someone over their head and not even break them. My problem is finding a turntable that will play these 78s as well as 33s. Anybody have any suggestions?