[QuadList] AVR 3 heads question

[Chill315 at aol.com]

Lee
 
How does the RF envelope look on the scope?
 
How is Vertical lining up with house?
 
Do you have an alignment tape?  If so, how does it play and where is  the 
tracking knob?
 
Are you using manual or auto tracking?
 
30 lines of black may be that you are one or two head passes off in the  
vertical realm.  The tearing may be due to the fact that you can not get  the 
head centered on the track perfectly.  
 
The head assemblies are made so good that they meet SMPTE specifications  
with in a few hairs.  This is to create interchangeability between  machines. 
 
 
I would not touch the heads in any way as you will destroy the  
interchange.  It is a critical factor.  If you saw the recent slide  show on here, you 
see the great deal of care taken to make a head.
 
Now the tape you have may have been done in a non standard method.   That 
is why all the questions.  
 
I always assume that the tape was poorly made.  Many operations did  not do 
best practices and thus there is a lot of poorly made tapes.  
 
Chris Hill
WA8IGN
 
 
In a message dated 7/30/2011 11:56:38 A.M. Eastern Daylight Time,  
lasvegastvengineer at yahoo.com writes:


Hay all, 
Have a good one here ??? 

AVR3  Mark XV heads. 

Have some 2" tape that when you try to pull it  through the machine will 
will give you something that looks like video  tearing in the whites and slow 
horizontal jitter. 

If I slam the  tracking all the way down, I get a very clean picture, but 
about 30  lines of black overhead on the screen. 

I see this on all my  new(er) heads I get from both Aheadtek and 
VideoMagnetics. 

I  have 1 very warn out head (supplier unknown) that will lock to these  
tapes

Has anybody seen this before and is there a way this heads  set up can be 
duplicated? 

Thanks 

Lee  



_______________________________________________
Please  trim posts to relevant info when replying!
Send QuadList list posts to  QuadList at quadvideotapegroup.com
Your subscribe, unsubscribe and digest  options are  here:
http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegr
oup.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://quadvideotapegroup.com/pipermail/quadlist_quadvideotapegroup.com/attachments/20110730/a905cbad/attachment-0005.html>