[78-L] The difference between 78 and 33 RPM records

[Michael Biel]

From: "neechevoneeznayou at gmail.com" <neechevoneeznayou at gmail.com>
>> No grooves in 78's . 
> Actually most 78s had only one groove, per side, 1 long continuous 
> groove unless there was a locked band, then there may have been more 
> than 1 groove per side

And don't forget the puzzle records (already mentioned by dl) which had
2, 3, or 4 separate interlaced grooves.

> if a runout was added later, then maybe that could count
> as an additional groove  

These were continuous with the sound groove.  However many records had a
separate protection groove around the outside of the label.

> cylinders had only one groove, unless someone can say
> that they have seen a cylinder with a locked groove and banding

I have.

> not sure how that would play when the stylus came to the
> land between grooves   joe salerno

As dl mentioned, the feedscrew would pull the reproducer along.  The
same is true of Edison Diamond Discs.

Mike Biel  mbiel at mbiel.com