On Sun, 11 Mar 2007, Andrea Giuliano wrote:
> At last I bought it, brand new, just the model is CT2, not CT200, but
> many people told me they are actually the same item.
The CT200 is an upgraded CT2. CT200 has a couple more "enhancement"
modes but the 200 is quite a bit more expensive.
> Now the bad surprise: on one hand it notably reduces lost frames, but on
> the other hand it produces a rather waving (or wiggling?) picture every ...
...
> mean is that the picture itself is not "stable", like a picture on a
> sheet of paper that someone moves makeing waves on the surface.
> The seller told me that the problem could be the european frequency (I
I think he is correct.
> clearly had to buy a universal adapter to get the 7.5 V DC input for the
> item), but I'm not so familiar with electrical engineering.
Hmmm, that is one approach but perhaps not the best one.
> Could it really be this the cause of the problem? It seems questionable
Yes - I think it could be the cause.
> Indeed, it could do that not very well, the current may be not so
> "direct" as CT2 requires, I don't know.
Correct. What you *may* be seeing the 50Hz ripple - basically means
the converte is not properly regulating/filtering its output.
> Any hint?
Can you try a stepdown transformer? By that I mean use the power
120V -> 7.5V adaptor that came with the CT2 BUT use a transformer
to go from 240/220 -> 120V. It could be the quality of the 7.5V
makes a big difference.
Or get a TBC (Time Base Corrector) but those are about 10x what the
CT2 costs ;(
Cheers,
Steven Schultz
p.s. put "Sima CT2" into a Google search - many reports of success but no
mention of waves/wiggling/shimmering of the picture.
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