[78-L] Groove spacing - groove width

[J. E. Knox]

Greetings from FixitLand!

Ron Roscoe wrote:

> ...However, this link www.esotericsound.com/Electronics/REQ2MAN.pdf gives you
> access to the most comprehensive listing of recording curves for both 78 and
> 33 rpm discs.  There are FIVE pages of playback curve equalizations.
> Incidentally, ***this chart shows that RCA didn't begin to change its turnover
> frequency upwards until around 1935-38 ... ***
[emphasis added]

Spectrum analysis of the records tells a different story. Don't believe everything you find on the Internet.

Take care,


—
Joe
—
“Women and cats will do as they please, and men and dogs should relax and get used to the idea.” — Robert A. Heinlein


-- 
*Celebrating 30 years of service.*