[78-L] Approximating 78s age by physical characteristics

[Ron L'Herault]

The Victor 10-50 had a changer and an acoustical arm.  It was an Orthophonic
machine though.  Key to it is the eccentric lead out that Victor came up
with and eventually licensed to others.  I'm pretty sure you can see one in
action on YouTube.

Ron L

-----Original Message-----
From: 78-l-bounces at klickitat.78online.com
[mailto:78-l-bounces at klickitat.78online.com] On Behalf Of David London
Sent: Sunday, March 03, 2013 6:29 PM
To: 78-L Mail List
Subject: Re: [78-L] Approximating 78s age by physical characteristics

On 03/03/13 23:10, Mark Bardenwerper wrote:
> I can't add much to this, but it should be noted that many of the 
> groove additions came with the invention of automatic changers. The 
> change in labels had to do with the manufacturing process. The 
> beginning of the electrical era had something to do with some of these 
> changes. Before electrical recording, there were electrically driven 
> platters. Someone more in the know might tell us if there was a 
> workable changer in the acoustic era. It would have been a challenge 
> due to the heftiness of the arm, but people could be pretty imaginative.

I was wondering also, if changers existed before lead-in grooves. It seems a
key addition to a record, else you risk the needle just sitting floating on
the leading edge of the record (or did they bias the arm to always swing
inward when there was no groove?).
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