Fwd: [QuadList] Ampex Mark 10 head differences

[Ted Langdell]

Here's a message from Don Norwood about how to tell the different styles of Mark X heads apart.

Ted

Ted Langdell
Secretary
Quad Videotape Group
e-mail:	ted at quadvideotapegroup.com



From: Don Norwood
Sent: Thursday, November 20, 2014 6:21 PM
To: Chill315 at aol.com ; rcbindy at comcast.net ; quadlist at quadvideotapegroup.com
Subject: Re: [QuadList] Ampex Mark 10 head differences
> 
> Chris’s info is correct, but if the label is misssing, there are still foolproof ways.  Here’s the reply I sent to Roger...
>  
> Hi Roger:
> 
> The preamps are usually labeled, but you can always tell by the connectors. 
> If you look at the one on eBay, you'll notice that the preamp connector is a 
> "blue-ribbon" style connector just like the main connector for the motor 
> etc.  That indicates a "Trim Pot" preamp (actually all passive) used on the 
> VR-1000/1100.  The transistorized preamp for the VR-1200 uses a DB-15 
> connector instead, and the Nuvistor preamp for the VR-2000 adds a second 
> multi-pin connector on the end of the transformer/preamp cover.
> 
> In a similar fashion, the way to tell a MK-10 head from a MK-15 is also by 
> looking at the connectors.  The MK-15 has all DB style connectors with no 
> blue-ribbon.  Another clue is that the MK-15 normally has a manual guide 
> positioner attached, but that's not conclusive since they can be removed and 
> since MK-10's can also have them installed.
> 
> Air-bearing and ball-bearing versions can be distinguished by the presence 
> or lack of the air-bearing inlet plate.
> 
> Don Norwood
> Digitrak Communications, Inc.
> www.digitrakcom.com

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