<html><head></head><body bgcolor="#FFFFFF"><div>I agree Chris and that is exactly what it looks like. The dots would would become worse (intensify) over many passes. To isolate the magnetized area I would put a layer or two of scotch tape on, say a post, and then do 10 or 20 passes and look at the dots again. Of course clean the path well after this.<br><br>Wayne Watson</div><div><br>Sent from my iPad<div><br></div></div><div><br>On 2012-07-25, at 11:55 AM, "<a href="mailto:chill315@aol.com">chill315@aol.com</a>" <<a href="mailto:chill315@aol.com">chill315@aol.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><span>Celebrating four years of Quad Conversations, July 25, 2012</span><br><span></span><br><span>_______________________________________________</span><br></div></blockquote><blockquote type="cite"><div><span>IMHO the rotary head is not the problem. The biggest thing that I found needing degaussing was the rest of the tape path. The magnetized areas would show up as fine dots on a diagonal line. This was caused by erasing a part of the tape. But it would only be a fine amount and appear to be a scratch.</span><br><span></span><br><span>Degaussing the path and it would disappear. The problem was that the demagnetization had taken place and the tape is now degraded.</span><br><span></span><br><span>We did the tape path about every 25 hours of head use.</span><br><span></span><br><span>Chris Hill</span><br><span></span><br><span>On Jul 25, 2012, at 1:32 PM, lee williams <<a href="mailto:lasvegastvengineer@yahoo.com">lasvegastvengineer@yahoo.com</a>> wrote:</span><br><span></span><br><blockquote type="cite"><span>Celebrating four years of Quad Conversations, July 25, 2012</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>_______________________________________________</span><br></blockquote><blockquote type="cite"><span>Does anybody have any experience on the benefits of degaussing the video heads on a Mark IV head?</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>Came across the old maintenance manual for the AVR3 and Ampex recommended that it be done every 100 hours. (As well as the entire tape path).</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>Is this overkill ?</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>Thanks</span><br></blockquote><blockquote type="cite"><span>Lee</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>_______________________________________________</span><br></blockquote><blockquote type="cite"><span>Please trim posts to relevant info when replying.</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>Change subject to reflect thread direction. Thanks.</span><br></blockquote><blockquote type="cite"><span>_______________________________________________</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>Send QuadList list posts to <a href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a></span><br></blockquote><blockquote type="cite"><span>Your subscribe, unsubscribe and digest options are here:</span><br></blockquote><blockquote type="cite"><span><a href="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com</a></span><br></blockquote></div></blockquote><blockquote type="cite"><div><div>IMHO the rotary head is not the problem. The biggest thing that I found needing degaussing was the rest of the tape path. The magnetized areas would show up as fine dots on a diagonal line. This was caused by erasing a part of the tape. But it would only be a fine amount and appear to be a scratch.</div><div><br></div><div>Degaussing the path and it would disappear. The problem was that the demagnetization had taken place and the tape is now degraded.</div><div><br></div><div>We did the tape path about every 25 hours of head use.<br><br>Chris Hill</div><div><br>On Jul 25, 2012, at 1:32 PM, lee williams <<a href="mailto:lasvegastvengineer@yahoo.com">lasvegastvengineer@yahoo.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><span>Celebrating four years of Quad Conversations, July 25, 2012</span><br><span></span><br><span>_______________________________________________</span></div></blockquote><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:lucida console, sans-serif;font-size:12pt"><div style="RIGHT: auto">Does anybody have any experience on the benefits of <span style="RIGHT: auto" id="misspell-0"><span>degaussing</span></span> the video heads on a Mark IV head? </div>
<div style="RIGHT: auto"> </div>
<div style="RIGHT: auto">Came across the old maintenance <span style="RIGHT: auto" id="misspell-1"><span>manual</span></span> for the AVR3 and Ampex recommended that it be done every 100 hours. (As well as the entire tape path). </div>
<div style="RIGHT: auto"> </div>
<div style="RIGHT: auto">Is this overkill ? </div>
<div style="RIGHT: auto"> </div>
<div style="RIGHT: auto">Thanks </div>
<div style="RIGHT: auto">Lee <var id="yui-ie-cursor"></var></div>
<div style="RIGHT: auto"> </div>
<div style="RIGHT: auto"> </div></div></div></blockquote><blockquote type="cite"><div><span></span><br><span>_______________________________________________</span><br><span>Please trim posts to relevant info when replying.</span><br><span></span><br><span>Change subject to reflect thread direction. Thanks.</span><br><span>_______________________________________________</span><br><span></span><br><span>Send QuadList list posts to <a href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a></span><br><span>Your subscribe, unsubscribe and digest options are here:</span><br><span><a href="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com</a></span></div></blockquote></div></blockquote><blockquote type="cite"><div><span></span><br><span>_______________________________________________</span><br><span>Please trim posts to relevant info when replying.</span><br><span></span><br><span>Change subject to reflect thread direction. Thanks.</span><br><span>_______________________________________________</span><br><span></span><br><span>Send QuadList list posts to <a href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a></span><br><span>Your subscribe, unsubscribe and digest options are here:</span><br><span><a href="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com</a></span><br></div></blockquote></body></html>