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ARSCLIST  March 2011

ARSCLIST March 2011

Subject:

Re: ELP turntable

From:

Doug Pomeroy <[log in to unmask]>

Reply-To:

Association for Recorded Sound Discussion List <[log in to unmask]>

Date:

Sun, 6 Mar 2011 18:18:51 -0500

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (121 lines)

Many thanks George for this info.

I am surprised the ELP won't play lacquers, but that ends the  
discussion!

Why the broken piece won't fit snugly against the larger piece from  
which
it was broken is a real puzzle and something I have never encountered  
before,
and I have a lot of experience with broken records.

It means that if I get the grooves to line up perfectly at the rim on  
one end of
the broken piece, the grooves will NOT line up on the other end!    
Dealing with
a gap is no problem as long as the grooves on both sides of it line up  
reasonably
well.

I can tell the lacquer has shrunken slightly, and I can deal with  
that, but glass
does not shrink, so why the large pieces won't fit together is truly  
inexplicable.

DOug

===========================================================

> Date:    Sat, 5 Mar 2011 16:15:34 +0100
> From:    George Brock-Nannestad <[log in to unmask]>
> Subject: Re: ELP turntable
>
> From: Patent Tactics, George Brock-Nannestad
>
>
> Hello,
>
> I did not want to repeat my praise for the ELP, because the matter  
> was up not
> that many months ago, but it does offer spectacular advantages, such  
> as not
> having to clean a record before sampling it.
>
> But now that we have learnt what it was wanted for, I think it only  
> fair to
> mention that lacquer records cannot be played anyway, because the  
> reflection
> from the material is too weak. It does not matter whether the rim  
> has a
> break; what Mike mentioned would be that there should not be a bite  
> taken out
> of it. Shellac records in many pieces loosely held together with  
> tape on the
> reverse side will play absolutely fine and will save you many hours of
> cementing together the jigsaw. If a bite were missing I would  
> definitely
> experiment with a temporary patch that only had to fulfil the  
> requirement
> that the reflection should be similar and that there should be no  
> local
> sudden change in outer radius. Filing a shard from another record  
> for a loose
> fit in the gap might work. I have not tried it. I can foresee  
> certain issues
> of groove pitch, but some experimenting would tell. The audio  
> information is
> gone from your record in that spot anyway, but the erroneous sound  
> you get
> for a few fractions of a second for a few turns of the record can be  
> edited
> out/blanked digitally later.
>
> I do not think a glass disc broken into two pieces is at all  
> unsalvageable. I
> am slightly worried that they do not fit together; at least the  
> carrier glass
> should, but perhaps the lacquer layer has shrunk back from the  
> broken edges.
> There was one Swiss archival turntable (well, in particular its  
> pickup) that
> would work in this situation; it used a trailing optical fiber that  
> will stay
> in almost any groove.
>
> John R.T. Davies used to have special jigs to support broken records  
> to be
> able to play them with a normal pickup, and my personal experience  
> has been
> that as long as you ensure that the stylus encounters a step DOWN at  
> both
> cracks when playing a record broken in two, you are basically fine.  
> If you
> are going to use cement to fill the gap you must think globally: the  
> two
> pieces have to be twisted ever so slightly when fitting them, and  
> the repair
> will then be good for both sides. Again depending on materials and  
> care, you
> may handle the record carefully, e.g. for turning it over, but  
> obviously it
> will not tolerate sleeving.
>
> We are looking forward to yet another unique jazz find!
>
> Best wishes,
>
>
> George
Doug Pomeroy
POMEROY AUDIO
Audio Restoration & Mastering Services
Transfers of metal parts, lacquers,
shellac and vinyl discs & tapes.
193 Baltic St
Brooklyn, NY 11201-6173
(718) 855-2650
[log in to unmask]

A bird in the hand gathers no moss.
----Louis Armstrong

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