[QuadList] ACR-25 Cue Times was: Ampex Models

[David Crosthwait]

Gary,

"Ampex was the absolute best at designing such systems.  Very good at DC servos for max acceleration and deceleration with a gentle touch... On the 1” machines, the ability to grab a reel and move it to jog the tape by hand.  Nice touch. "

I'd say that's why so many NBC sports slo-mo guys from NYC preferred a truck with 1" VPR 2's so as to be able to grab the reels and do the slo-mo by hand, as apposed to the controller running the transport. The VPR 2  most likely would not spill tape if done right, a must on live sports.

Don's truck had VPR 2's. Ran them on NFL football in Miami in the 80's.




David
(So-mo operator back then...)
www.dcvideo.com




On Mar 11, 2011, at 11:08 AM, Gary Adams wrote:

> I would say that Ampex was the absolute best at designing such systems.  Very good at DC servos for max acceleration and deceleration with a gentle touch.   Very impressive.  RCA stuck with the old AC motor drivers for everything just about and that made for a very rubbery control of reel servos and belt drive.  On the 1” machines, the ability to grab a reel and move it to jog the tape by hand.  Nice touch. 
>  
> Gary
>  
> From: quadlist-bounces at quadvideotapegroup.com [mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf Of W4wj at aol.com
> Sent: Friday, March 11, 2011 1:50 PM
> To: quadlist at quadvideotapegroup.com
> Subject: Re: [QuadList] ACR-25 Cue Times was: Ampex Models
>  
> Ah...  Forgot about that one Dennis...  Very good!!
>  
> All the movement parameters in the ACR-25
> were designed to minimize the time required
> to perform an operation...  i.e.  NO OVERSHOOT!!  ;-)
>  
>  
> Don Murray, W4WJ
> Retired from 40 years of Miami TV Engineering
> 35+ years at NBC O&O WTVJ  
>  
>  
> In a message dated 3/10/2011 4:33:06 P.M. Central Standard Time, DennyD1 at verizon.net writes:
> 
>         On Mar 9, 2011, at 5:20 PM, W4wj at aol.com wrote:
> 
> > The machine spun the carousel the shortest distance to get to the  
> next bin to play...
> 
>         I add:
> 
>     It also used a ramping profile to accelerate and decelerate the bin  
> carousel as it rotated from bin to bin.
> 
>             Dennis Degan, Video Editor-Consultant-Knowledge Bank
>                         NBC Today Show, New York
> 
> 
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David Crosthwait
DC Video
Archived Media Transfer and Re-mastering Services
177 West Magnolia Blvd.
Burbank, CA. 91502
818-563-1073
818-563-1177 (fax)
818-285-9942 (cell)
DCFWTX at AOL.COM
DAVID at DCVIDEO.COM
WWW.DCVIDEO.COM

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