[QuadList] Gene Kelley Show color recording system

[C. Park Seward]

Guy is exactly right about the head switching which occurs every 16  
lines.  Also remember you have to interface the TBC to the servo/sync  
system in the VTR and provide outputs for monitoring AMTEC and  
Velocity errors so you can adjust for proper playback. It is not just  
to correct composite errors.

Monochrome playback was possible without correction (only the proc  
amp) if you didn't mind not having H lock and just wanted to look at  
it on a monitor. I can look at the demod out in monochrome, the  
monitor locks just fine.

Best,
Park

C. Park Seward
Visit us: http://www.videopark.com



On Jan 4, 2009, at 5:12 PM, WVGO wrote:

> Hi Brian....
> It is the instantaneous line to line error that occurs at the head  
> switch point that is the problem for a TBC with quad.
> Not even an Ampex Zeus can deal with that....just not an issue with  
> helical scan recorders.
> Guy
>
> Brian Hoover wrote:
>>
>>
>> --- On *Sun, 1/4/09, WVGO /<WVGOfm at aol.com>/* wrote:
>>
>>    From: WVGO <WVGOfm at aol.com>
>>    Subject: Re: [QuadList] Gene Kelley Show color recording system
>>    To: "Quad List" <quadlist at quadvideotapegroup.com>
>>    Date: Sunday, January 4, 2009, 11:46 AM
>>
>>    Hi Park....
>>    I've been wanting to experiment with an outboard TBC on a quad  
>> for some
>>    time.  What model is your NEC TBC?  Does it also have dropout  
>> compensation built
>>    in?
>>    Apparently, very few digital time base correctors out there are  
>> designed to
>>    deal with the line to line errors inherent in quad.  I know that  
>> Harris made
>>    one, but I didn't know of any others.
>>    Guy
>>    www.GuySpiller.com
>>
>>    Huh?
>>
>>    Quad video playback is about the most time-base stable
>>     off-tape video you will ever     come across. That's why the  
>> first analog time base correctors for quad only had     a window of  
>> 2 microseconds. Any time base corrector should be able to play  
>> back     quad video just fine.
>>
>>    Brian
>>
>> ------------------------------------------------------------------------
>>
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>
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