[QuadList] TBC

[Don Norwood]

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.
>>