<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'>Don, <br><br>Responses follow below. <br><br>Allan<br><br>----- Original Message -----<br>From: "Don Norwood" <dwnorwood@embarqmail.com><br>To: "Quad List" <quadlist@quadvideotapegroup.com><br>Sent: Monday, February 16, 2009 6:08:17 PM GMT -05:00 US/Canada Eastern<br>Subject: Re: [QuadList] Non-Contact Extraction of the Program from Quad Tape<br><br>
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<div>----- Original Message ----- </div>
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<div>From: <<a href="mailto:allanmc-avtech@comcast.net" target="_blank">allanmc-avtech@comcast.net</a></div>
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<div><strong>Allan:</strong></div>
<div><strong></strong> </div>
<div><strong>I have not given this prior consideration, so these are my
initial reactions in regard to your thoughts. My replies are inserted
below:</strong></div>
<div> </div>
<div><strong>>SNIP<</strong></div>
<div> </div>
<div> I'm suggesting non-contact playback! Its being done for other media
such as phono records and we are all familiar with the development of magnetic
tracks for editing. </div>
<div> </div>
<div><strong>A couple of things to consider. With phono records, you are
measuring (with a laser) the physical properties of the grooves. That's
a totally different task from reading magnetic recordings. As far as
the magnetic developer, I believe the particles in the developer are far too
large to resolve the frequencies required.<br><span style="color: rgb(51, 51, 255); font-weight: bold;">I did not mean to exactly duplicate the same manner in which phono records are recovered by laser. My intent was to get folks to thinking and talking about "non-conventional" ways of playing the tape which we've not really given serious thought to before. </span><br></strong><br>- What do you think?
<br><br>- What are the challenges to be overcome? <br><br><strong>I suspect that
the nature of the video recording will make it extremely difficult to recover
using non-contact magnetic heads. Such an approach obviously works in disc
drives, but the recording process for data is very different from that
used in analog VTR's.<br><span style="color: rgb(51, 51, 255);">Agreed on all points but let's not discard the potential use of non-contact just yet. </span><br></strong><br><strong>>SNIP<</strong></div>
<div> </div>
<div>But, couldn't we do better.... with a NEW non-contact method that
potentially would recover everything originally recorded into a recovered and
restored state? <br></div>
<div><strong>While I see problems with the methods you have mentioned, I
certainly would not want to suggest that some thinking "outside the box" might
not come up with a totally new approach. Whether it would be economically
feasible for anyone in the private sector to undertake such a project
is another matter. I doubt that there is enough market to ever recover the
R&D expenses involved. But it would be an interesting
experiment!<br><span style="color: rgb(51, 51, 255); font-weight: bold;">You are right on target concerning the private sector funding issue and this being a limited market. I don't think it could be accomplished by any company driven for profit only. Perhaps, we can interest someone in a proof of concept experiment and then look for a grant or passionate source of funding dollars. </span><br></strong></div>
<div><br>Just musing........because I think the goal must be to extract the
program information more than it is to just play the tape again in the same way
we used to do it. <br><br>Allan McConnell </div>
<div> </div>
<div><strong>Don<br></strong></div><br>_______________________________________________
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