[QuadList] Anamoaly on Rockethub Page

[Don Norwood]

Hi Chris:

Nope, it's not the same head in all of the pictures.  The only one that's a XV is the one mounted on the machine.  The others are a Mk-X.  As I said, there's a definitive way to identify the Mk-X and the Mk-XV.  Hint.......anytime you can see either the top or the bottom of the baseplate, you can tell whether it's a X or a XV.

Don Norwood
Digitrak Communications, Inc.
www.digitrakcom.com

----- Original Message ----- 
  From: chill315 at aol.com 
  To: Quad List 
  Sent: Wednesday, April 03, 2013 11:07 AM
  Subject: Re: [QuadList] Anamoaly on Rockethub Page






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  You have answered a few questions.  The only thing is that one has to assume that it is the same head in all the pictures.  


  I would agree that it is a 15 head because of the probability of any other is so small.  But if the firing squad was cleaning the rifles and loading them as I was asked the question, I would not bet the life on it.

  Chris Hill

  On Apr 3, 2013, at 10:44 AM, "Don Norwood" <dwnorwood at embarqmail.com> wrote:




    Hi Chris:

    Not certain about the VR-1000 but I have seen Mk-III heads with the manual positioner installed although they could have been for the 1100.

    The guide servo was not available for the VR-1100.  As you point out, the manual positioner was available for the Mk-X used on those machines, and in fact, the X was required for most of the 1100's beyond the early production units which used the Mk-III.  All later 1100's had an additional chassis with the individual channel adjustments and included a label on the deck plate stating that a Mk-X head was required.

    The guide servo was an option on the VR-1200, although I've not seen one without it except in catalog pictures.  The 1200E does not include a control on the operator panel, so I assume it was not offered and certainly wasn't needed for recording.  I suppose a studio machine used only for recording would have no need for one either, so maybe some 1200's were sold in that configuration.

    There is however, a definitive way to determine if the head shown in the pictures is a X or a XV.  Only the machine-mounted head in the next to last pic is a XV.

    Don Norwood
    Digitrak Communications, Inc.
    www.digitrakcom.com  
      ----- Original Message ----- 
      From: Chill315 at aol.com 

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      The first guess would be that the head has a manual guide adjuster on it.  This was on the Mark 15 heads.  

      But there were some machines that may have not used the auto guide assembly.  I say this as the guide was listed as an accessory in the set of books.  

      So does anyone know if there was a machine that did not have the electronic guide assembly in the VR-1000, 1100, or 1200 series.  How about the E models that were the low boy so called portable units?  Or the 1100's?

      Now Mark 10 heads could be used in earlier machines.  There was a trimmer module that replaced the nuvistor or transistor pre amp that allowed this.

      Chris Hill

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