<html><head></head><body bgcolor="#FFFFFF"><div>I understand and I should have provided more detail. I used a work tape, not a client or master tape, and it was on AVR-1's so I used auto cue/time code marks and only went for ten seconds of tape. The AVR-1 would do ten or twenty passes very quickly.<br><br>Sent from my iPad<div><br></div></div><div><br>On 2012-07-25, at 1:13 PM, "<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><span></span></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>Wayne</span><br><span></span><br><span>I could not afford to even do the additional passes. The client in the </span><br><span>post production business will not accept any damage to their tape. And now, </span><br><span>it is even more critical in the transfer business. I can see where this </span><br><span>would apply in the broadcast station where tape gets reused a lot. We would </span><br><span>have to eat the time and tape costs to do any work over that was damaged in </span><br><span>this method. So our standards were different than many other places.</span><br><span></span><br><span>Chris Hill</span><br><span></span><br><span></span><br><span>In a message dated 7/25/2012 2:26:15 P.M. Eastern Daylight Time, </span><br><span><a href="mailto:wayne.watson@sait.ca">wayne.watson@sait.ca</a> writes:</span><br><span></span><br><span>Celebrating four years of Quad Conversations, July 25, 2012</span><br><span></span><br><span>_______________________________________________</span><br><span></span><br><span>I agree Chris and that is exactly what it looks like. The dots would </span><br><span>become worse (intensify) over many passes. To isolate the magnetized area I </span><br><span>would put a layer or two of scotch tape on, say a post, and then do 10 or 20 </span><br><span>passes and look at the dots again. Of course clean the path well after this.</span><br><span></span><br><span>Wayne Watson</span><br><span></span><br><span>Sent from my iPad </span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>On 2012-07-25, at 11:55 AM, "_<a href="mailto:chill315@aol.com">chill315@aol.com</a>_ (<a href="mailto:chill315@aol.com">mailto:chill315@aol.com</a>) " </span><br><span><_<a href="mailto:chill315@aol.com">chill315@aol.com</a>_ (<a href="mailto:chill315@aol.com">mailto:chill315@aol.com</a>) > wrote:</span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>Celebrating four years of Quad Conversations, July 25, 2012</span><br><span></span><br><span>_______________________________________________</span><br><span></span><br><span></span><br><span></span><br><span>IMHO the rotary head is not the problem. The biggest thing that I found </span><br><span>needing degaussing was the rest of the tape path. The magnetized areas </span><br><span>would show up as fine dots on a diagonal line. This was caused by erasing a </span><br><span>part of the tape. But it would only be a fine amount and appear to be a </span><br><span>scratch.</span><br><span></span><br><span>Degaussing the path and it would disappear. The problem was that the </span><br><span>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>_ </span><br><span>(<a href="mailto:lasvegastvengineer@yahoo.com">mailto:lasvegastvengineer@yahoo.com</a>) > wrote:</span><br><span></span><br><span></span><br><span>Celebrating four years of Quad Conversations, July 25, 2012</span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>_______________________________________________</span><br><span></span><br><span></span><br><span>Does anybody have any experience on the benefits of degaussing the video </span><br><span>heads on a Mark IV head?</span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>Came across the old maintenance manual for the AVR3 and Ampex recommended </span><br><span>that it be done every 100 hours. (As well as the entire tape path).</span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>Is this overkill ?</span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>Thanks</span><br><span></span><br><span></span><br><span>Lee</span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>_______________________________________________</span><br><span></span><br><span></span><br><span>Please trim posts to relevant info when replying.</span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>Change subject to reflect thread direction. Thanks.</span><br><span></span><br><span></span><br><span>_______________________________________________</span><br><span></span><br><span></span><br><span></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>(<a href="mailto:QuadList@quadvideotapegroup.com">mailto:QuadList@quadvideotapegroup.com</a>) </span><br><span></span><br><span></span><br><span>Your subscribe, unsubscribe and digest options are here:</span><br><span></span><br><span></span><br><span>_http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapeg</span><br><span><a href="http://roup.com">roup.com</a>_ </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><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>IMHO the rotary head is not the problem. The biggest thing that I found </span><br><span>needing degaussing was the rest of the tape path. The magnetized areas </span><br><span>would show up as fine dots on a diagonal line. This was caused by erasing a </span><br><span>part of the tape. But it would only be a fine amount and appear to be a </span><br><span>scratch.</span><br><span></span><br><span></span><br><span>Degaussing the path and it would disappear. The problem was that the </span><br><span>demagnetization had taken place and the tape is now degraded.</span><br><span></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>_ </span><br><span>(<a href="mailto:lasvegastvengineer@yahoo.com">mailto:lasvegastvengineer@yahoo.com</a>) > wrote:</span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>Celebrating four years of Quad Conversations, July 25, 2012</span><br><span></span><br><span>_______________________________________________</span><br><span></span><br><span></span><br><span></span><br><span></span><br><span>Does anybody have any experience on the benefits of degaussing the video </span><br><span>heads on a Mark IV head? </span><br><span></span><br><span>Came across the old maintenance manual for the AVR3 and Ampex recommended </span><br><span>that it be done every 100 hours. (As well as the entire tape path). </span><br><span></span><br><span>Is this overkill ? </span><br><span></span><br><span>Thanks </span><br><span>Lee </span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><span></span><br><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>(<a href="mailto:QuadList@quadvideotapegroup.com">mailto:QuadList@quadvideotapegroup.com</a>) </span><br><span>Your subscribe, unsubscribe and digest options are here:</span><br><span>_http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapeg</span><br><span><a href="http://roup.com">roup.com</a>_ </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><span></span><br><span></span><br><span></span><br><span></span><br><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>(<a href="mailto:QuadList@quadvideotapegroup.com">mailto:QuadList@quadvideotapegroup.com</a>) </span><br><span>Your subscribe, unsubscribe and digest options are here:</span><br><span>_http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapeg</span><br><span><a href="http://roup.com">roup.com</a>_ </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><span></span><br><span></span><br><span></span><br><span></span><br><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_quadvideotapegr">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegr</a></span><br><span><a href="http://oup.com">oup.com</a></span><br></div></blockquote><blockquote type="cite"><div>
<meta content="text/html; charset=US-ASCII" http-equiv="Content-Type">
<meta name="GENERATOR" content="MSHTML 8.00.6001.19258">
<font id="role_document" color="#000000" size="2" face="Arial">
<div>Wayne</div>
<div> </div>
<div>I could not afford to even do the additional passes. The client in
the post production business will not accept any damage to their tape. And
now, it is even more critical in the transfer business. I can see where
this would apply in the broadcast station where tape gets reused a lot. We
would have to eat the time and tape costs to do any work over that was damaged
in this method. So our standards were different than many other
places.</div>
<div> </div>
<div>Chris Hill</div>
<div> </div>
<div>
<div>In a message dated 7/25/2012 2:26:15 P.M. Eastern Daylight Time,
<a href="mailto:wayne.watson@sait.ca">wayne.watson@sait.ca</a> writes:</div>
<blockquote style="BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><font style="BACKGROUND-COLOR: transparent" color="#000000" size="2" face="Arial">Celebrating four years of Quad Conversations, July 25,
2012<br><br>_______________________________________________<br><br>
<div>I agree Chris and that is exactly what it looks like. The dots 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 title="mailto:chill315@aol.com" href="mailto:chill315@aol.com">chill315@aol.com</a>" <<a title="mailto:chill315@aol.com" 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 title="mailto:lasvegastvengineer@yahoo.com" 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 title="mailto:QuadList@quadvideotapegroup.com" 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 title="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com" 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 title="mailto:lasvegastvengineer@yahoo.com" 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="BACKGROUND-COLOR: #fff; FONT-FAMILY: lucida console, sans-serif; COLOR: #000; 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 title="mailto:QuadList@quadvideotapegroup.com" href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a></span><br><span>Your
subscribe, unsubscribe and digest options are here:</span><br><span><a title="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com" 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 title="mailto:QuadList@quadvideotapegroup.com" href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a></span><br><span>Your
subscribe, unsubscribe and digest options are here:</span><br><span><a title="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com" href="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com</a></span><br></div></blockquote><br><br><br>_______________________________________________<br>Please
trim posts to relevant info when replying.<br><br>Change subject to reflect
thread direction.
Thanks.<br>_______________________________________________<br><br>Send
QuadList list posts to <a href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a><br>Your subscribe,
unsubscribe and digest options are
here:<br><a href="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com</a></font></blockquote></div></font></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>