On 3/28/2011 1:44 AM, Dan Nelson wrote:
> Victor DL 5, a program transcription by RCA.
> Ok help me put a note on this record, when and what ..
> I know its a 33 and visually looks like a fine groove... how fine ?
> When was it made and what was the purpose ?Many thanks dnelsonward
It's the demo record provided with every Victor, RCA, GE, and
Westinghouse 2-speed radio-phono combination in 1931-32 to introduce the
buyer to the Program Transcription series. It came in a two or three
pocket soft-sided album with a printed explanation. The machines with
the home-recording switch also got a blank pre-grooved recording disc in
the album and there also was a regular Victor 78 included. .
There is a complete discography of the Program Transcription in back
issues of the ARSC Journal by Ted Fagen in 13:1, 14:3 and 15:1. Page 32
of the first article shows this record as matrices LBRC-70138 and 39 on
July 30, 1931.
Ted said that the groove size was the same as the 78s but were to be
played with special chromium needles. I think that most agree that the
groove size is narrower than the 78. Indeed, the L in the prefix
indicates it. The grooving seems to be about 150 per inch which is
different than if the letter was M was used which denoted a 33 recording
with standard size groove for Vitaphone and broadcast transcriptions.
Ted did not understand that, as he shows his confusion at the end of the
introduction. (When the L grooving was used for broadcast
transcriptions they could get a 15 minute side on 14-inch discs, but the
M grooving was 15 minutes on a 16-inch disc. Later film soundtracks
using the L grooving got 10 minutes on a 12 inch disc. He is confused
about what he mentions as a film transfer, because these really used the
letter F. When he wrote this he didn't have access to all the documents
I later found.)
Mike Biel [log in to unmask]