Re: Audio Devices, Inc. company history?
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.
Re: Audio Devices, Inc. company history?
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. --Chuck
Re: Audio Devices, Inc. company history?
On 6/2/19 12:04 PM, Chuck Guzis via cctalk wrote: > Does anyone remember these folks? I only have one reel of audiotape, and that has a tag of being cleaned in 1968. I couldn't find any other chocolate brown oxide tapes with dates later than that. Maybe they died off with the switch to 800bpi (coercivity change with the darker formula)?
