On record players, how does a 78 needle differ from a 45 needle?

Hi Davitaz53,
"The difference is size. the 78 stylus is 4 times larger than the LP
stylus. This is because the groove dimensions of the 78 disc are
larger. if you place a LP stylus into a 78 groove, the needle will be
resting on the bottom of the groove instead of tracing the groove
wall. The result is lots of surface noise and little sound. Over the
years I have seen many collectors accept this poor sound as simply the
fault of the record! Using the right size stylus is always important."
http://www.kabusa.com/needbelt.htm
"Are different needles required for LP, 45's and 78's?
Yes. There are two basic groove sizes, 78's are called Standard groove
and LP's & 45's are called Micro groove. There is a 4 to 1 difference
in stylus size for each groove. It stands to reason that the right
size stylus gets the best sound from each groove."
http://www.kabusa.com/ttables.htm
I hope this helps!
regards,
jackburton-ga
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[ difference 78 needle 45 record ]

Precise answer and done quickly. Thanks so much!