"Ross Matheson" wrote in message
...

In any case, it would appear that the vinyl 78's were designed to be
played
back with a "normal" cartridge sporting a 78 stylus; there are cartridges
that will accept both LP & 78 styli, albeit at a higher tracking force for
78.

In most ordinary record players, cartridges used to be "turnover" for many
years after the introduction of fine groove records. The cantilever had two
styli and you turned a small knob on the front to change between fine and
coarse groove. I don't remember anyone changing the playing weight though,
it was probably about 5 g for everything.
--
Tony W
My e-mail address has no hyphen
- but please don't use it, reply to the group.