[78-L] Groove spacing - groove width

[Kristjan Saag]

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?
Kristjan



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