[QuadList] Capstan Information

[Chill315 at aol.com]

Everyone is correct so far.  The VR-3000 was making tapes that were  not to 
standards.  We had a local facility that did industrial videos and  used a 
VR-3000 as a record device.  They had the AVR-1 as a playback.   It always 
worked.
 
So what is standard for the control track?  I would have to go get a  book 
and study it a bunch.  But here is what we did to compensate for all  the 
little variances in manufacture of a video head to control track head  spacing.
 
When doing an Intersync alignment, we would use the alignment tape as a  
playback for centering the tracking control.  There were four (?) pots that  
would set it for each position of the head selector.  This meant that the  
machine would play any tape recorded to standard with the tracking knob at 12  
o'clock.
 
Next would be to record on blank stock using the procedure to put the frame 
 pulse at the top of the control track 240 Hz sine wave.  When playing this 
 recording back, if the tracking know had to be moved from the 12 o'clock  
position, then the recoding was not to the same standard as the alignment  
tape.  I would then move the frame pulse a bit left or right and then try  
again until the tracking knob on playback was straight up.  
 
This procedure compensated for the minute tolerances in  manufacturing.  
There is an adjustment on the Mark X heads to move the  control track head but 
we never considered doing this as it was a chance to do  more damage and a 
big waste of money.  
 
Our goal was to create tapes that were as close as possible to  perfect.  
We strived to get recordings and playbacks to the highest quality  possible.  
It was easy once the mind set was created and procedures were  followed.  
Peoples jobs actually became easier and they were able to  concentrate on the 
creative end and not worry about the technical end.   Thus we got a 
reputation as a quality house.  
 
Hope this helps with the thought process.
 
Chris Hill
WA8IGN
 
 
In a message dated 9/24/2014 11:53:50 P.M. Eastern Daylight Time,  
john at jmit.com.au writes:

Just as  an aside, Don, we found playing back a tape from a 3000 on a 2000
required  the use of non standard tracking on the intersync - this was the
case for  all 6 of our 2000's. Our Avr1 and AVR 2 just played it - what was
the go  here?

John Miller
Creations Unlimited
Rocky River
NSW  Australia 

-----Original Message-----
From: QuadList  [mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf 
Of
Don Norwood  via QuadList
Sent: Thursday, 25 September 2014 11:42
To:  Chill315 at aol.com; quadlist at quadvideotapegroup.com
Subject: Re: [QuadList]  Capstan  Information




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