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ARSCLIST  July 2019

ARSCLIST July 2019

Subject:

Re: Variant on Amertape Recordgraph system

From:

"Richard L. Hess" <[log in to unmask]>

Reply-To:

Association for Recorded Sound Discussion List <[log in to unmask]>

Date:

Thu, 18 Jul 2019 12:09:09 -0400

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (115 lines)

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!

Cheers,

Richard

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 
> scratches.
> 
> Good luck with this,
> 
> Corey
> 
> Corey Bailey Audio Engineering
> www.baileyzone.net
> 
> On 7/17/2019 11:32 AM, Richard L. Hess wrote:
>> Hi,
>>
>> 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? 
>> surface.
>>
>> https://www.dropbox.com/s/5ls6innje771qhc/IMG_4720.JPG?dl=0
>>
>> 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.
>>
>> Thanks!
>>
>> Cheers,
>>
>> Richard
>>
> 

-- 
Richard L. Hess                   email: [log in to unmask]
Aurora, Ontario, Canada                             647 479 2800
http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.

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