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

[Gary Adams]

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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