<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:14pt"><div><span>Hi Folks,</span></div><div><br><span></span></div><div><span>When two great engineers were developing the last great quad DOC, the second one for the AVR-3, a new non-destructive way to add magnetic dropouts or mag scratches was devised. <br></span></div><div><span>Get a section of the rubber magnet material from a old refrigerator door gasket. It's what holds the door closed and causes the gasket to seal. The stuff I have seen and used was about a 1/4" wide and 1/8" thick and could be cut very easily with a sharp knife or a pair of diagonal cutters.</span></div><div><span>I would keep a piece about the length of a toothpick (2.5"-3") shaped with a fine point, in my shirt pocket when I was doing a demo. You could make all kinds of dropouts with this and not damage the tape stock, just that recording.
<br></span></div><div><span>This is what happens when two great VTR engineers have to make a great digital DOC!</span></div><div><span><br></span></div><div><span>What you don't want is any of the rare earth super magnets anywhere around tape products. A un-named NY post house did dubbing on some quads in the basement level in the late 70's and a guy decided to store the razor blade they used to cut tape on one of the metal support columns with a rare earth magnet which just stuck to the Lally column. <br></span></div><div><span>That caused so many problems, they finally removed the column and the guy who brought the magnet in to store the razor blade. Take care!<br></span></div><div><span></span> <br></div><div>Bye for now, Bill Carpenter<br></div> <div style="font-family: arial, helvetica, sans-serif; font-size: 14pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2">
<hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Don Norwood <dwnorwood@embarqmail.com><br> <b><span style="font-weight: bold;">To:</span></b> Quad List <quadlist@quadvideotapegroup.com> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, July 25, 2012 7:13 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [QuadList] Deck degaussing--What's the current practice amongQuadList users?<br> </font> </div> <br>
Celebrating four years of Quad Conversations, July 25, 2012<br>______________________________________________<br><br><br><div id="yiv2083953425">
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<div>Hi Ted:</div>
<div> </div>
<div>I degauss everything in the tape path on a fairly regular schedule.
Why would you want to take a chance otherwise? When you discover that you
need to do it, it's too late. Obviously, a problem could arise between
scheduled degausing times, but that's not been a problem for me recently.
It's also my standard practice to degauss a new headwheel before mounting
it on the machine.</div>
<div> </div>
<div>Specifically regarding the headwheel, it is possible for a single head tip
to become magnetized. When that happens, you probably won't notice it on
the first pass, but subsequent passes of the same tape will become very obvious
with a loss of RF on the magnetized channel. I haven't seen that
problem in a long time, but I remember it well from the first time I saw it in
the early 70's and didn't realize what was wrong! </div>
<div> </div>
<div>Don Norwood<br>Digitrak Communications, Inc.<br><a rel="nofollow" target="_blank" href="http://www.digitrakcom.com/">www.digitrakcom.com</a> </div>
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<div style="FONT:10pt arial;">----- Original Message ----- </div>
<div style="FONT:10pt arial;BACKGROUND:#e4e4e4;"><b>From:</b>
<a rel="nofollow" title="ted@quadvideotapegroup.com" ymailto="mailto:ted@quadvideotapegroup.com" target="_blank" href="mailto:ted@quadvideotapegroup.com">Ted Langdell</a> </div>
<div>Chris, </div>
<div><br></div>
<div>Sounds like you're saying that its better to invest the relatively short
amount of time to degauss the tape path often rather than to have
un-repairable damage to archive or customer tape's content that can't be
replaced or restored.</div>
<div><br></div>
<div>What is the current practice among our QuadList users?</div><br>
<div> </div></blockquote></div>
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