[78-L] Groove spacing - groove width

[J. E. Knox]

Greetings from FixitLand!

Kristjan Saag wrote:

> When recording went electric one of the consequences was the ability to 
> avoid overcutting - it became easier to control loud signals. Thus 
> groove spacing was affected: the number of grooves per inch or 
> centimetre was increased, recording time per disc side could also be 
> increased.
> But apart from groove spacing - is there any evidence that groove width 
> was affected as well? As we know different record companies used 
> different groove width both before and after the advent of electric 
> recording, and it's also clear that groove width generally decreased 
> with time. But I've seen no mention of a major change haven taken place 
> due to electric recording.
> Does anyone know more about this?