[QuadList] Responding to: Excellent Exchange - Non-ContactExtraction of the Program from Quad Tape - Ampex non-moving head

[Pat Shevlin]

Don,

Sony's first Sprinter 5000 was a vertical configuration and it had to rewind
the master at the end of the program.  It also used a transfer tape between
the master and blank tape. The Sony 800 (horiz config) used a loop bin that
vibrated.  The TMD Otari used a vertical config with a loop bin.  I spent
years of Engineering time modifying them to higher speeds.  We had 100 of
the Sony Sprinters at Technicolor Worldwide.

Pat

-----Original Message-----
From: quadlist-bounces at quadvideotapegroup.com
[mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf Of Don Norwood
Sent: Tuesday, February 17, 2009 10:42 AM
To: Quad List
Subject: Re: [QuadList] Responding to: Excellent Exchange -
Non-ContactExtraction of the Program from Quad Tape - Ampex non-moving head

----- Original Message ----- 
From: <allanmc-avtech at comcast.net>

Quad.List,

- About the Ampex High Speed Duplicator. At Byron's Motion Pictures in 
Washington, DC, we had one. In my experience running it I admit to being 
fascinated by the manner in which the magnetic signal was transferred from 
the Master tape to the Slave tapes as it passed through the Transfer 
chambers. Would love to know more about the manner in which that occurred 
especially since that section "Theory of Operation" in the Ampex manual was 
blank!

Allan:

There are several different methods of contact duplication which were 
"perfected" for mass duplication of VHS tapes.  One system was made by Otari

and another by Sony.  Both used mirror master tapes, but the systems were 
not the same.  I believe that Sony used an exciter field and Otari may have 
been a thermal processs, but my memory is somewhat vague!  I have hi-res 
pics of both systems if you'd like to see what they looked like.  The Sony 
was a flatbed, the Otari was vertical.

The Sony system was called the Sprinter.  The Otari was their TMD System 
T-700.

Found a link to the product brochure for the Sony system:
http://www.storageheaven.com/downloads/sony%20sprinter%20vhs%20duplicator.pd
f

Don


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