[78-L] Frequency Response/Range for 78's

[James]

Thanks for the note. I am surprised there is not more info out there. 
Seems it is critical for us amateurs who try and 'restore' the records.



On 7/25/2012 9:02 PM, David Lewis wrote:
> Can anyone point me to a site that has a good break down of the
> realistic frequency response range for records in the 78 RPM era? I am
> looking for something that covers everything 1900-1957. I have looked
> and find bit here and there, much of it having to do how surprisingly
> well certain records from a certain era do...but I am looking for
> general guidelines. I know that all records were not made equal, so info
> on Victor records vs. Paramount is great as well. But what about Mexican
> 78's from the 1950's? Off brand 78's from the 40's? A 1938 Vocalion vs.
> a 1948 Aladdin. What are some 'general' guidelines?
>
> Thanks for any help....
> Not much help here; there has been a lot of data collected on this front,but I do not know of a single resource for it all. Perhaps ARSC, or someone, should set aside a place for people to park such data: high peak, low peakon a label in a given year or era. There is some string theory type researchthat needs to be investigated in regard to acoustics; how some can capture backand front perspective within a three-dimensional environment whereas others donot, and why. Why do badly damaged copies of records lose this perspective? SteveSmolian gave a demonstration at ARSC where he demostrated room sound on a Carusorecording at above 20,000 hz. I couldn't hear it, but that doesn't mean Stevewas wrong. We would need to leave room within a source document collecting thesefigures to account for anomalies like these.
>
> Uncle Dave Lewis
> uncledavelewis at hotmail.com 		 	   		
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