Audio Devices, Inc. company history?

[Al Kossow]

On 6/2/19 10:58 PM, Chuck Guzis via cctalk wrote:
> I had a look at a couple of additional reels of Audio Devices tape from
> 1965 and 1966.  Both were darker and labeled with an "Certified for 800
> bpi" sticker and well as a "Heavy Duty Made with 1.5 mil DuPont Mylar".
> 
> I'm concluding that the tape in question is pretty darned old.
> 

I think so too.

I uploaded the specification for IBM's 200bpi tape from 1960.
http://bitsavers.org/pdf/ibm/magtape/IBM_Magnetic_Tape_Specifications_200BPI_Sep1960.jpg

Coercivity is specified as no more than 280 oersteds.