[QuadList] RCA TRT Quad Headwheel panel on ebay

[Don Norwood]

Yes, it was for 7.5 ips.  It was used on all models up thru the TR-22.  I believe that most machines did use the air bearing version though.  I know that many of the TRT-1's were converted for air bearing heads.  A machine equipped for air bearing heads could also use the older ball bearing heads.  That was true for both RCA and Ampex.

Don
  ----- Original Message ----- 
  From: Ted Langdell 
  To: Quad List 
  Sent: Saturday, December 20, 2008 10:14 PM
  Subject: Re: [QuadList] RCA TRT Quad Headwheel panel on ebay


  On Dec 20, 2008, at 5:57 PM, Don Norwood wrote:


    Hi Ted:

    According to my RCA catalog, this part number is a 5-mil headwheel with ball bearings. 


  So this would likely have been used to record tapes at 7.5 ips?  


  What machines did it fit?




    A bit of headwheel trivia.......These lowband headwheels were offered with either ball bearings or air bearings.  I believe that RCA was the first to offer air bearings, while Ampex was the first to offer rotary transformers.  RCA apparently continued to offer the lowband heads after they developed their highband head.   However, after Ampex introduced the Mark Ten for highband, they no longer made their lowband panels, but versions of the Mark Ten were available for low band.  As far as I know, there were never any of the Ampex lowband Mark Three panels that had air bearings, but the Mark Ten was available either way to accomodate machines without the air package.

    Don




      ----- Original Message -----
      From: Ted Langdell
      To: Quad List
      Sent: Friday, December 19, 2008 10:14 PM
      Subject: [QuadList] RCA TRT Quad Headwheel panel on ebay


      This has apparently been on ebay for a while.  


      RCA part MI-40791-AZ, serial 3203.


      http://cgi.ebay.com/Vintage-Quadruplex-VTR-Headwheel-RCA-TRT-Quad_W0QQitemZ230252354142QQcmdZViewItemQQptZVideo_recorders_Players?hash=item230252354142&_trksid=p3286.c0.m14&_trkparms=66%253A4%257C65%253A1%257C39%253A1%257C240%253A1318#ebayphotohosting


      Hope everyone is warm and dry... and doesn't suffer a power outage or air loss while the headwheel is spinning. 


      Ted


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