dlt at earthlink.net
Thu Aug 13 05:01:01 BST 2009
I have notes from a mini-course on MKIII maintenance I attended in
November 1985. It was held in the Saticoy office of Rank North Hollywood
and taught by Paul Chapman and William Capon.
From those notes:
1976: MKIII Jumpscan introduced at NAB. All analog (no Digiscan) and
1977: First Jumpscan machines delivered in USA. Serial numbers 1-80
1978: MKIIIB Digiscan I Serial numbers 80-250 approximately. Digiscan I
was 24fps 525/60 only but was capable of being modified to run @30fps.
MKIIIB had dark grey control panels and included DigiVAC I.
1980: MKIIIB Digiscan II (Serial numbers < 500). Included DigiVACI, ran
18fps, 24fps, 30fps in 525/60 and 18 & 25fps in 625/50. It also ran at
1982: MKIIIC Started with Digiscan II (Serial numbers 500 - 650 light
grey control panels. Included options VariSpeed, XYZoom, Variable
shuttle, Saturation control. Still included DigiVAC I.
1984: MKIIIC Digiscan 3 (Serial numbers 650 - 780). Included improved
mechanical construction, better screening...
A note at the bottom of the page indicates that there were no MKII
machines in the US and they didn't run at 525/60.)
The machine in TC1 at Action Video was a Digiscan 2, included all of the
1982 options above but I always suspected they were fitted after the
machine left the factory. Action Video opened in 1983. The suite
included a Dubner 32 slider preprogrammer interfaced to the MKIII by
Alex Jepson. A RCA camera secondary chroma comp was included in the
original installation but it was never "right."
I remember the lost weekends spent on the floor in front of this machine
while bringing a pin registered transfer system up. I ended up
replacing the XYZoom card with one I built for pin reg use only due to
the hum and noise present in the system modulating both the scans and
the shading correction.
Sierra Madre CA
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