[78-L] Lead-in groove mystery

[David Lennick]

A number of 1930 Columbias have lead-ins. The distance from the locked groove 
to the label seems to vary as well.

dl

On 8/30/2014 10:29 PM, David Weiner wrote:
>
> Columbia did put lead-in grooves on a number of 1930 releases, but then
> dropped it until 1936..
>
> Dave Weiner
>
> On 8/30/14, 10:18 PM, "Gary Herzenstiel"<gherzens at comcast.net.invalid>
> wrote:
>
>>
>> Hi, everyone.
>>
>> I just picked up a Columbia Whiteman "potato head", numbered 2297-D with
>> matricies 150788-3 and 150789-3, both recorded on 10 September 1930.  The
>> label looks like this one:
>>
>> http://78rpmrecord.com/labelshow.cfm?whichLabel=1143
>>
>> Oddly, it has a lead-in groove.  It appears to be little wider than the
>> normal audio groove, spirals in at a normal rate and starts from the edge
>> of the record.  This seems very early for a lead-in groove.  Has anyone
>> done a survey of lead-in and run-out grooves?  I was always told that
>> they were developed for the jukebox industry but this certainly casts
>> doubt.
>>
>> Thanks.    Gary H
>> 78rpmrecord.com
>> (more label scans than anyone should have - adds your scans!)
>>
>>