Re: [ARSCLIST] Ampex 456 - tip of the iceberg...chemistry

["Richard L. Hess" <arclists@xxxxxxxxxxxxxxx>]

At 09:10 PM 6/16/2006, Parker wrote:
> on 6/16/06 7:05 PM US/Central, Richard L. Hess at arclists@xxxxxxxxxxxxxxx
> wrote:
>
> > We can create a hypothesis that back-coating in contact with binder
> > has a catalytic effect on the degradation of the binder.
>
> My experience is that the binder compound is much more likely to be
> transferred to the smooth surface of the hub or adjacent layers of plastic
> timing tape.
>
> These are specific areas where there is no such contact at all.

That is indeed true, but that is a separate problem. I've seen that 
on Maxell UD-35 to 3M white plastic leader, but UD-35 has been 
reasonably good for transferring, although I noticed bursts of high 
frequencies that my mics couldn't record nor the recorder record and 
I suspect that we were seeing small bursts of stiction on playback. I 
thought at first there had been bats in the church until I realized 
that I couldn't record those levels (this is in the > 20 kHz area of 
an 88.2 ks/s transfer). I want to revisit that tape with a treatment 
I'm working on.


> ---
> Parker Dinkins
> MasterDigital Corporation
> CD Mastering + Audio Restoration
> http://masterdigital.com

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.