16 Jun
2002
16 Jun
'02
4:28 p.m.
John Honniball wrote:
Dave Woodman wrote:
Perchance they do - the technology is still old, though! I haven't
played games with TV internals for many a long year - and when
I was playing I didn't like the HT finding me to be a convenient
ground, when I thought I have discharged all the caps - I still have
the odd tiny scar from the arcs...
I do know that some use a chip to perform the delay - what the
mechanism inside the chip is, I don't know (perhaps old
technology in a new package?).
Cheers,
Dave.
The mechanism that was used in early TV sets to
achieve the
correction was rather interesting:- the set contained a glass block,
with an ultrasonic transducer at each end (one sending, the other?
well, no prizes for guessing!). The delay in the block was one
transmitted line so the output could be directly compared with the
following line. Ah, the wonders of old technology...
Old technology? Does that mean there's some newer version of
the standard PAL delay line that I wasn't previously aware of?
I thought all PAL sets (and video recorders?) used a glass delay
line in this manner.