[78-L] Oldtimers query

[Donna Halper]

On 4/3/2019 5:56 PM, Michael Shoshani wrote:
> Correction to autocorrect: topica.com. When I started here, we had clunky
> old VGA monitors that didn’t try to fix our spelling...


You were on the list in 1998 when I joined.  Here you are, responding to 
a conversation with Joe Salerno and Mike Biel:

-------- Forwarded Message --------

Subject: 	Re: [78-l] An Apparent Mistake on TV
Date: 	Thu, 17 Dec 1998 08:43:46 -0600 (CST)
From: 	Michael Shoshani <shoshani at wwa.com>
Reply-To: 	78-l at MyList.net
To: 	78-l at MyList.net



> Anyway, the apparent mistake in the facts presented in this program was as
> they were breaking for a commercial they presented a little factoid 
> stating
> that the LP was introduced in the "Late '50's." Late '30's is more 
> like it,
> ya, -- with the introduction of the 10" microgroove record?

Edison introduced the first microgroove record in the early 1920s. He
used a groove finer than a human hair, at a pitch of 450 threads per inch
(as opposed to his standard 150 tpi, which was still finer than the 78's
90 tpi) to make a record that played for up to 40 minutes...at 80 RPM.
These records were labeled and sold as "Long Playing" records--probably
the first major ones to be designated as such.

The modern lateral microgroove record was introduced by Columbia in 1948,
but Victor had issued 33 1/2 RPM records in 1931. These records had the
standard 3 mil groove used on commercial 78s of the time.

-- 
shoshani at wwa.com        //    It could probably be shown by facts and
  Michael Shoshani     //   figures that there is no distinctively
    Chicago IL, USA   //   native American criminal class
http://miso.wwa.com/~shoshani/   //   except Congress.          --Mark Twain


-- 
Donna L. Halper, PhD
Associate Professor of Communication & Media Studies
Lesley University, Cambridge MA