"Asimov" wrote in message
...

All vcr's have a very stable horizontal rate but the vertical is often
pretty jittery and might be noticable in a few rare circumtances when
interfacing equipment.

It would help if the OP would tell us what he wants to achieve, and whether
his VCR works properly or not. If he is copying tapes, then his VCR may be
functioning perfectly and a TBC may be useful. If he is recording off air
and having problems, a TBC will be useless.

In these uncommon cases a black box that can hold
a couple of frames and shoot them out at the right time might help.
However, a tbc is a pretty esoteric piece of equipment. aka $$$


You can get cheaper ones which store lines instead of full frames though. I
think for most people the cost would need to be justified by doing a lot of
video copying work.

There's an article here on TBCs which the OP might find interesting.

http://www.sparkysworld.co.uk/tbc.htm

Dave