[QuadList] PTL Club--Quad duplication 1974-78--What do you know?

[Dennis Degan]

		On Jul 2, 2013, at 7:28 AM, Dave Satin wrote:

> Actually the nexus for high speed quad duplication was in New York, at EUE/Screen Gems. I worked in the videotape department in the late 1970s and early 1980s. High Speed was located on the 4th floor,across the corridor from the tape room that serviced the soap operas which were shot on the 6th floor.
> The first step in high speed quad dubbing was to create a Mirror Image Master or MIM, which was done on a modified AVR 1 that recorded on metal tape and ran backwards. That is to say that the supply reel was located on the right, the take up was on the left, and used a modified mark X head assembly, with a head wheel that ran counter clockwise. We would wind the metal tape onto Pyrex glass reels because the degausser, which was designed and built in house was so powerful, that magnetic induction would cause the aluminum reels to melt.
> MIMs were created in real time, by dubbing. After the MIM was done, it was threaded onto the high speed duplicator which had 5 or 6 slave tape transports. The high speed duplicator printed the tracks from the master to the slaves with a combination of heat and pressure and would run a 30 minute show in 6 minutes.

		I say:

	Dave, I remember that dubbing room!  In early 1979, I interviewed at EUE for a video maintenance job (I didn't get in, but worked at Reeves/Teletape instead, located on the next block for more than 6 years).  I wish I'd taken some photos of the place, but alas It was during a job interview so I could not.  I have not been back to the building since then; and I know much has changed.

			Dennis Degan, Video Editor-Consultant-Knowledge Bank
					NBC Today Show, New York


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