[QuadList] TBC

[Chuck Reti]

At Wayne State University in early 70's, we had a homebrew colorized/ 
highbanded TR-4, with a similar Microtime TBC. I don't recall if our  
guys or factory had it provisioned with a head switch pulse  
suppressor. It worked reasonably well, but was not at all tolerant of  
even slight skew due to misadjusted guide (oops, SHOE) position.

Chuck Reti
Detroit MI
WV8A

On Apr 30, 2011, at Apr 30 11:56 AM, rabruner at aol.com wrote:

> At one time I had a Microtime analog TBC, based on switched delay  
> lines, that was supposed to handle Quad video. It had a meter on  
> the front panel.  It was a gargantuan beast, about six or seven  
> rack units. Not sure of the model number, but it was a predecessor  
> of the all solid state units. I never tried hooking it to a quad to  
> check out that function.  It was squirrely and glitchy by the time  
> I encountered it.
>
> I experimented with feeding demod out of a VR 2000 into a Sony  
> BVT-1000, which was intended for their BVH-1000 and it would make  
> good pictures within a range of errors, but it was necessary to  
> have a pretty good match in the head geometry between the tape and  
> the machine.   If you made a recording and then played it back, it  
> worked most of the time, but if you tried to put up any random  
> tape, you would get errors at the edges of the head passes . . .   
> It wouldn't be practical without some additional processing  
> internally.
> Bob Bruner
> W9TAJ
>

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