[78-L] "Blank Disk"

[Royal Pemberton]

Sounds like it was made to both verify the cartridge was exactly level and
parallel with the record surface and also was intended for setting
anti-skating.  And would be produced after the 1950s.

On Fri, May 20, 2011 at 7:23 AM, D P Ingram <darren at ingram.fi> wrote:

> Hi. Whilst going through a recent set of donations, we came over a "blank
> disc" (vinyl, 12 inch) that we've never seen before.
>
> It is titled "Wilson Stereo Library Ltd." (with a London, UK address) and
> on both sides it says "Blank Disc to simplify pick-up alignment and correct
> side pressure"
>
> And, of course, no recorded tracks or grooves.
>
> Why would such a piece of round plastic be issued ? Was it some form of an
> underlay (and if so, why would a label go to the trouble of issuing such a
> thing)?  Were such issuances common with the move from shellac to
> microgroove LPs ? There is no date on the piece. It would be useful to know
> more so we can catalogue it and place some notes so further generations of
> confused persons share some knowledge.
>
> Thanks, Darren
>
> ¦ D P Ingram ¦ Ab Ingram Oy ¦
> ¦ darren at ingram.fi ¦  www.ingram.fi ¦
> ¦
> ¦ MUSIC LIBRARY FINLAND - www.musiclibrary.fi
> ¦
> ¦ +358 6 781 0275 (FIN) ¦ extn 8001
> ¦
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