<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:tahoma,new york,times,serif;font-size:12pt"><div>I think we should also recognize the engineers who made the AST work, Ray Ravizza, an electronic engineer who worked on the AVR-2, possibly the Audio, since he was one of the last on the project, and nobody wants to do audio. <br>He worked with Richard Hathaway, a mechanical engineer who had worked on helical scan with me back in Elk Grove in the middle 60's, came to California, cleaned up the mechanics of the Cartrivision machine while a couple of other ex-Ampex guys made color work on this machine.<br>Then he came back to Ampex and he did the mechanics of the AST, but Ray made it work electronically and I believe has his name on the Patent.<br>Ray did the AST work on many machines, and after the VPR-3, he asked for a one man project so he could learn more about software. <br>We figured out that ABC,
who we sold a 100 AVR-3's to wanted an interface that would allow the HS-100 controllers and cables to be used to run the VPR-3, so Ray built a great device, a base for an HS-100 controller, which would connect to the device and allow the device to be connect to the VPR-3 via a serial cable, or at the VPR-3 end where HS-100 cables were already installed. He did everything including most of the mechanical design. His next effort was the design of the robotics for the ACR-225, which is a very fast, precise, safe robot which moved at 100"/sec/<font size="1">2</font><br><br>OBTW, we are writing all this on the Quad site, and somebody should send some to the OLDVTR site, since they might be interested.<br><br>Bill Carpenter<br></div><div style="font-family: tahoma,new york,times,serif; font-size: 12pt;"><br><div style="font-family: verdana,helvetica,sans-serif; font-size: 12pt;"><font size="2" face="Tahoma"><hr size="1"><b><span style="font-weight:
bold;">From:</span></b> Dennis Degan <DennyD1@verizon.net><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> Sun, May 9, 2010 10:44:34 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [QuadList] Ampex AST heads and CMC DPT heads--what's different?<br></font><br> <br> On May 8, 2010, at 5:37 PM, Wayne Watson wrote:<br><br>> The AST head was actually split across and lengthwise. Across, and then wired polarity opposite, to correct for the Zenith problem. Lengthwise (a more narrow strip) to provide feedback position; what direction and how much it was bent would give a voltage.<br><br> I add:<br><br> This would make the complete AST system a closed-loop servo. The narrow piezo strip was the key to making it
work.<br><br> Dennis Degan, Video Editor-Consultant-Knowledge Bank<br> NBC Today Show, New York<br><br><br>_______________________________________________<br>Please trim posts to relevant info when replying!<br>Send QuadList list posts to <a ymailto="mailto:QuadList@quadvideotapegroup.com" href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a><br>Your subscribe, unsubscribe and digest options are here:<br><span><a target="_blank" href="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com</a></span><br></div></div> </div><br>
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