[QuadList] Ampex Mark XV head question

[chill315 at aol.com]

First thing is check your air supply.

Is it completely dry?  
Do you have a super filter on it to take out any oil or other contaminants?

How is your vacuum?

Next do no play with the screw.  It sets the rotary transformer spacing.  That can create some interesting things.  

Questions.

Does this noise continue after tape is stopped with head still spinning?

Have you used the screwdriver to the ear trick to figure out where in the head the noise is generated?

await more information.

Chris Hill

On Feb 8, 2013, at 6:56 PM, lee williams <lasvegastvengineer at yahoo.com> wrote:

> 
>  
> Have a new Mark XV head on a AVR3 that has about 100 on it.
>  
> It starts off quiet, then after about a half hour starts to develop a random whine as the tape is passing through. 
>  
> I would normally call up the company that rebuilt it, but the last 3 times we have sent something back to them they have not honored there warranty. 
>  
> Does anybody have any experience with working on a Mark XV ? 
>  
> Was wondering what the screw with the spring that is close to the brushes adjusts? 
>  
> I am really hesitant to do anything because this head is making a really great picture, but I am concerned that the whine is cutting down on the life. 
>  
> Any experience would be appreciated. 
>  
> Thanks 
>  
> Lee  
>  
>  
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