[QuadList] Smith splicer, etc.

[Don Norwood]

Hi Park:

Well, it's just my afternoon for strange memories I guess!  Again, many years ago, I remember having to do this.  If a 15 ips recording was made using a 5-mil head (yes I know that shouldn't happen, but it can!), then a 10-mil head may be problematic for playback.

I also vaguely recall using a 5-mil head to get rid of some strange tracking problem on a 15 ips tape, but I don't recall exactly what the circumstances were on that one.

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

  ----- Original Message ----- 
  From: C. Park Seward 
  To: Quad List 
  Sent: Thursday, October 14, 2010 5:07 PM
  Subject: Re: [QuadList] Smith splicer, etc.


  The only reason to use a 5 mil head was to play a 7.5 ips tape. I don't know why someone would use a 5 mil head for a 15 ips tape. 


  Best,
  Park


  C. Park Seward
  818-535-2747 cell
  541-476-6657 home
  Visit us at: www.videopark.com
  Sent from my iPhone 4

  On Oct 14, 2010, at 1:16 PM, Tom Evans <tom at tom-evans.com> wrote:


    Bill,

    Most of the Low Band Mono tapes I recall were recorded with a 5 mil head (not the standard 10 mil head).  

    The digital TBCs of the AVR-2 and TR-600 generation were clocked by an oscillator locked to colorburst.  What happens when no colorburst is present?  Perhaps a VR-1200 with AMTEC could do better.

    -Tom Evans (with more questions than answers)




    On Thu, Oct 14, 2010 at 2:41 PM, <bill.spencer at northstarstudios.tv> wrote:

      All,



      I am working on a recovery project and have had a splice part on me.  If anyone knows of a Smith splicer or a 2” audio straight cut splicer in or near Nashville that I could borrow for a few days please let me know.



      Also, some of these tapes were recorded with improper deviation in LBM and the sync is low.  I can turn the demod level up so that the sync locks and then run the video through a proc amp to bring it back to normal, but it is still causing the MTBC in my TR-600 to have an excessive amount of jitter.  Does anyone know of some old tricks to make a TR-600 play LBM better?  Was there ever a LBM demod for the AVR-2 or has anyone successfully modified one?  I have two extras so I have something to experiment with.



      Tapping the well of all wisdom for all things quad, I thank you in advance.



      Bill Spencer

      RF Engineering Supervisor

      NorthStar Studios, Inc.

      3201 Dickerson Pike

      Nashville, TN 37207



      Phone 615.650.6000 ext. 6610

      Cell 615.445.5616

      Fax 615.650.6027

      email bill.spencer at northstarstudios.tv





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