[QuadList] Anamoaly on Rockethub Page

[chill315 at aol.com]

Don

You are right.  Now it is so easy to see.  Look at the wire for the tach.  There is only one on the earlier pictures.  The 15 had two tach systems.  The original once a revolution and the later one.

Chris Hill

On Apr 3, 2013, at 11:44 AM, "Don Norwood" <dwnorwood at embarqmail.com> wrote:

> 
> 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
> 
> 
> 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
>> 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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