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

[Royal Pemberton]

And weirdly enough one Royal Blue I have, with Henry Hall on one side and
Lew Stone on the other (3114-D) uses US-dubbed matrices numbered in the
ARC/Columbia series with eccentrics; the Hall was dubbed from UK Columbia
matrix CA.15445-1 of 13 November 1935, the Stone from Regal Zonophone
matrix CAR.3680-1 of 21 October 1935.  Both presumably with eccentrics on
the originals.

On Mon, Mar 4, 2013 at 3:34 PM, David Lennick <dlennick at sympatico.ca> wrote:

> US Columbia also pressed from dubbed masters for a couple of years, even on
> classical recordings, to avoid that eccentric groove that all the EMI
> labels
> were using as of the merger.
>
> dl
>
> On 3/4/2013 10:31 AM, Royal Pemberton wrote:
> > Curious about Victor saying publicly they're OK with other companies
> using
> > the eccentric stop groove in November 1934....I wonder if Columbia ran
> into
> > trouble with them earlier in the year?  As the few May 1934 Columbia
> sides
> > I have end with eccentrics and the August 1934 Columbia I have, 2942-D,
> > which has (AFAIK) the lowest numbers in the CO-prefixed ARC numerical
> > series (CO.15541 and 15542) has instead the older concentric stop groove.
> >
> > On Mon, Mar 4, 2013 at 3:06 PM, Milan Milovanovic<
> > milanpmilovanovic4 at gmail.com>  wrote:
> >
> >>
> >> Consider including raised blank outside area on some early pressings.
> Think
> >> they used it to block needle slippage from the beginning of record. The
> >> same
> >> method used for inside area with no locked and lead-out groove - raised
> >> portion of the record used as for later transferred into locked groove.
> >>
> >>
> >> ----- Original Message -----
> >> From: "David London"<jusmee123 at gmail.com>
> >> To: "78-L Mail List"<78-l at klickitat.78online.com>
> >> Sent: Monday, March 04, 2013 12:28 AM
> >> 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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> >>
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