[QuadList] TBC

[David Crosthwait]

George,

That was the CVS 520 and the later CVS or Harris 590. Been there, done that with those boxes!

Best Regards,

David Crosthwait
DC Video
Archived Media Transfer and Re-mastering Services

Offices located at:
177 West Magnolia Blvd.
Burbank, CA. 91502
818-563-1073
818-563-1177 (fax)
818-285-9942 (cell)

DAVID at DCVIDEO.COM
WWW.DCVIDEO.COM




On Apr 29, 2011, at 3:34 PM, george keller wrote:

> CVS had a DTBC it had either a 16 or 20 in it's model number which had an optional extra wired in small board mod for segmented machines.  There may still be some around, but look for the board.  AF put one in a 1200 D or E(?) and made it smaller than an AVR 2, you could roll it around anywhere.
>  
> I have also played wilth DTBC's and the 2000 also with no real luck.  Widening out the supression pulse and moving it around showed some noticable results, but no cigar.  Might not have too bad in mono, but never tried it.
>  George Keller
> 
> 
> -----Original Message-----
> From: Don Norwood <dwnorwood at embarqmail.com>
> To: Quad List <quadlist at quadvideotapegroup.com>
> Sent: Fri, Apr 29, 2011 5:53 pm
> Subject: Re: [QuadList] TBC
> 
> Shai:
> 
> The design is very different.  I have tried many different models, not 
> expecting them to work, but just out of curiosity.  NONE of them, from 
> older, early generation TBC's to very modern designs will work.  There are 
> two main problems.....first is the different nature of the timing error 
> between segmented and helical, and second is that many of the early designs 
> as well as later and less expensive models were not designed for use with 
> direct color recovery.  They rely on the heterodyne processing in the VTR to 
> recover the color signal, and that's the market that most of the TBC's were 
> designed for.
> 
> Merlin used several different models of NEC TBC's but I believe most of them 
> required some degree of modification.  They also used an Adda VW-2 and an 
> Ampex TBC-800, both with some mods .  You can find info on these on our 
> website on the Merlin Literature page.
> 
> Don Norwood
> Digitrak Communications, Inc.
> www.digitrakcom.com
> 
> ----- Original Message ----- 
> From: "Shai Drori" <srdbx at netvision.net.il>
> To: <quadlist at quadvideotapegroup.com>
> Sent: Friday, April 29, 2011 11:32 AM
> Subject: Re: [QuadList] TBC
> 
> 
> > Why is that? I thought that maybe an old TBC might be able to handle this? 
> > Has anyone tried this before? Also, what do I do with LB on an AVR-2? Ken 
> > Zin looks very busy at the moment I doubt he'll have time for me now to 
> > talk about his cards. Is the avr-1 and tr-70 the only multistandard 
> > machines?
> > Shai
> >
> > On 29/04/2011 11:00, quadlist-request at quadvideotapegroup.com wrote:
> >> The problem is that the TBC must be designed for segmented scan.  VERY 
> >> FEW
> >> ever were, and I'm not aware that any on the market today or in recent 
> >> years
> >> will work for anything other than non-segmented (helical) scan.
> >>
> 
> 
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