Searching for SMPTE standard for Ampex Type A format video recording

[Ted Langdell]

Happy December 1 (as opposed to other labels for the day)

The 1960's era Ampex 1" industrial/educational videotape format that spawned the VR-5xxx, 6xxx and 7xxx VTRs is often referred to as "Type A"  or "SMPTE Type A" with the assertion that it became a SMPTE Standardized format at some point.

Searching does not turn up any references to a SMPTE Standard that seems to apply, although one can find the SMPTE Type C helical scan standard without too much difficulty:

http://standards.smpte.org/gca?gca=smptes%3Bst-20-2003%2F1%2Fpart1&gca=smptes%3Bst-19-2003%2F1%2Fpart1&gca=smptes%3Bst-18-2003%2F1%2Fpart1&allch=&submit=Go

and similarly, for Type-B (the Bosch segmented 1" helical format)

Does anyone on the list know whether there was an actual SMPTE Standard adopted (or even proposed) for this legacy Ampex format, and if so, what the Standard Number is?

For Example: 
ST 19:2003
For Television Analog Recording — 1-in Type C — Records
Scope
This standard specifies the dimensions and location of recorded video, audio, and tracking-control records for 1-in type C helical-scan television analog recorders operating in the 525/60 monochrome or NTSC color systems.


Directions to applicable standards or proposed standards, (or such information for "Type A" as outlined in the three Type-C documents linked to) would be most appreciated.

Cheers and thanks,

Ted

Ted Langdell
Secretary
Quad Videotape Group
e-mail:	ted at quadvideotapegroup.com

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