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Re: [ARSCLIST] 1937 shellac test pressing outperforms audio CD

At 01:25 PM 2009-04-03, Eric Jacobs wrote:
On Friday, April 03, 2009 9:34 AM, Richard L. Hess wrote:

> A few years later, someone -- I think it was published in
> audio -- had taken a scanning electron microscope to these
> very same CBS test records and, low and behold, there was
> RINGING recorded in the grooves! I wish I could find that
> article again!

Richard, thanks.  Funny, but last night I met someone who
has her own scanning electron microscope (SEM) in her
*garage* (only here in Silicon Valley).  It is an older
SEM - about 15 years old, hence the size.  If it turns out
that my cartridge is not ringing, then I very well may put
the disc under an SEM.

I have most of the CBS test records.  Do you recall which
test track you observed the ringing upon?  Square wave
perhaps?  I may have to put that test record under the SEM
and see if I can reproduce the test results of that

It was a square wave test, but I don't know recall which record. This was 1971.

I've dreamed of having an SEM for a long time, but ... anyway.



Richard L. Hess email: richard@xxxxxxxxxxxxxxx
Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.

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