[QuadList] Dropout Compensator (WAS Next Question of the day)

[C. Park Seward]

I think most DOC operated the same way. It has an RF sensor to determine a dropout, which is a lack of RF. It took the preceding video line and placed it where the RF was missing. Some DOCs put white or black and others put video while still others placed correctly phased video. With most average pictures, you have a hard time telling it was corrected. Usually the beginning or end of the line had some distortion and that was a tip off.

I have a couple of the 3M DOCs and they are will made and work well.

Best,
Park

C. Park Seward
Cell: 818-535-2747
Home: 541-476-6657
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On Mar 22, 2011, at 8:33 AM, Sammy Jones wrote:

> Chris Hill wrote:  
>> The 3M division was Mimcom.  They made the drop out
>> compensator for  the 
>> Ampex machine that did the really good job of inverting the
>> Chroma and  making 
>> the drop outs invisible.  Loved it after they put in
>> the test  circuit.  No 
>> longer needed a special tape.
> 
> This sounds fascinating.  Since I've never operated Quad myself, I'd love to hear more about how various dropout compensators in Quad worked...
> 
> Sammy Jones
> Georgia Public Broadcasting
> 
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