[QuadList] Saturday Quad Matinee feature--KCOP, 13, Los Angeles--1979 Rose Parade remote truck "Behind the Scenes" with David Crosthwait

[bill.spencer at northstarstudios.tv]

Steve,

Those are 'magnetic' scratches.  They were more prevalent on RCA
machines because of a guide that had little holes in it with air blowing
through them to keep the tape from sticking.  Usually that guide got the
holes filled with magnetized debris that shed from the tapes and it was
enough concentrated magnetism to erase small portions of the record
passing by.  They stay in the same place because a small line of
magnetism gets segmented by the quad heads rotation and shows up as a
pattern diagonally from top left to bottom right.  At least this is what
someone told me about 50 years ago!

Bill Spencer
RF Engineering Supervisor

3201 Dickerson Pike
Nashville, TN 37207
Phone: 615-650-6000 x6610
Cell: 615-445-5616
Web Site: www.NorthStarStudios.TV

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-----Original Message-----
From: QuadList [mailto:quadlist-bounces at quadvideotapegroup.com] On
Behalf Of Steve White
Sent: Sunday, November 18, 2012 9:19 AM
To: quadlist at quadvideotapegroup.com
Subject: Re: [QuadList] Saturday Quad Matinee feature--KCOP, 13, Los
Angeles--1979 Rose Parade remote truck "Behind the Scenes" with David
Crosthwait