The magnetic fluid was just an afterthought to possibly enhance the
visibility in case the magnification could use some help. Just thinking
out loud (as it were) because I'm not sure that either, or both, would help.
Corey Bailey Audio Engineering
On 7/18/2019 9:09 AM, Richard L. Hess wrote:
> Hi, Corey and Paul,
> Thank you both!
> [Responding to Corey]
> The hub is definitely not a DIN hub. I have adapters for those and
> have transferred some. It looks to be about two inches in diameter and
> I'm not certain that there is any keying (the EIA (cine), NAB, and DIN
> hubs have keying systems). The "data" hub that was common is larger
> than an NAB hub with no keying and has a circular slot that if open
> forces the mag tape to read only.
> I'd like to know more why you are suggesting a magnetic developer
> fluid? Just as a contrast enhancer (i.e., filling whatever
> grooves/indentations are on the tape) or are you thinking that somehow
> there may be some magnetic properties to the tape?
> We wound in and it was clear there was a break between the clear
> leader and the start of whatever.
> It appears that the entire spool is clear. I think we unspooled enough
> to say that there's no opaque mag stuff further in.
> [Responding to Paul]
> The "tape" appears CLEAR throughout its length, no mag coating. It is
> thin and flexible and about an inch wide (approx). Thanks for the
> link, the 9-track data tape is very familiar to the people who
> contacted me as it is what they transfer. For those who care, there
> are good pictures of the "data" hub I was describing in my section
> above in your link. It is not that.
> All good thoughts!
> Thanks again!
> On 2019-07-17 8:41 p.m., Paul T. Jackson wrote:
> > From your description, this sounds like the tape used by the Dec Mini
> > Computers back around the 60-70s.
> > https://wikivisually.com/wiki/9_track_tape.
> On 2019-07-17 8:02 p.m., Corey Bailey wrote:
>> Hi Richard,
>> I have no idea just what you may have there. However, it might be
>> useful to observe the material with some magnification to see
>> (literally) if there any clues. Perhaps, with the correct amount of
>> magnification & light, one could observe the modulation. You could
>> also apply a magnetic fluid like "Kyread" to a small area to see if
>> it enhances the visibility. You're description of the hub sounds like
>> it may be European although I haven't observed any reels of data tape
>> in years.
>> That said, I have come across clear leader, both audio tape & film,
>> where one could observe the track configuration based on the linear
>> Good luck with this,
>> Corey Bailey Audio Engineering
>> On 7/17/2019 11:32 AM, Richard L. Hess wrote:
>>> I was invited to discuss three "tapes" that a colleague has that
>>> appears to be about one-inch wide, on metal reels with a hub smaller
>>> than an NAB or DATA hub. The bottom metal flange had a flat ring on
>>> the outside (much like the Magnetophon reels).
>>> This tape is CLEAR and appears to be a relative of the Recordgraph
>>> Amertape system, although my vague recollection was that system
>>> scratched a wider or narrower track in the coating of the film. This
>>> one is using clear film. There are three reels.
>>> Here is the best image of the ones I received showing the recorded?
>>> Any ideas? The reels are marked "Honeywell." The latest one (1976)
>>> is marked "High Density 555." The reels are about 10-12 inches in
>>> diameter. The recordings are 1963-1976.
>>> From the marked contents, and the little background I have, I would
>>> expect these contain testimony or discovery type information from
>>> high-profile cases.
>>> Yet another format...
>>> Any and all help is appreciated.