Re: [AV Media Matters] Barrium Ferrite posted for Ian Gilmour

[joe salerno <salernoj@swbell.net>]

Yes, monkey with your machines, and THEN how do you play your older tapes?
And does the diferring tape formulation wear the heads a different way?

Joe Salerno
Video Works! Is it working for you?
PO Box 273405 - Houston TX 77277-3405
http://joe.salerno.com
joe@salerno.com
Fax: 603-415-7616
----- Original Message -----
From: "Jim Lindner" <jim@vidipax.com>
To: <AV-Media-Matters@topica.com>
Sent: Wednesday, August 02, 2000 7:54 AM
Subject: [AV Media Matters] Barrium Ferrite posted for Ian Gilmour

>Scott and colleagues.
>We did some fairly thorough tests on Ba-ferrite tapes for Digital
>Betacam,
>SP Betacam and DAT within the last 12 months and we found two main
>problems.
>Firstly the coercivity and particle orientation are quite different from
>the standard metal particle tapes so it's difficult to record a strong
>rf
>level with a uniform envelope unless the machines are modified - and who
>wants to start fiddling with the manufacturer's specs on their
>equipment?
>Secondly, the binders are still a conventional polyester-polyurethane,
>which reacts with moisture by hydrolysis in long term storage, so even
>though the magnetic particles are stable, you may still end up with an
>unplayable tape.
>I would agree with JimW about sticking with some of the respects brands
>-
>they're not perfect but they're much better made. Even the housings on
>the
>Ba-ferrite tape samples we assessed were not up to the best standards.
>Feel free to post this to the list - I'm not signed on at the moment.
>
>
>Ian Gilmour
>Manager, Engineering & Research Group
>ScreenSound Australia
>[the National Film and Sound Archive]
>GPO box 2002
>Canberra City ACT 2601 Australia.
>Phone 61 2 62482027  Fax 61 2 62482165
>