D-shell connector age?
ard at p850ug1.demon.co.uk
Thu Jan 4 17:56:15 CST 2007
> To be honest, it's a great idea - and much better than non-European countries
> where the typical connectivity is via RF only.
> Going source->modulator->tuner->display never did seem like a good idea when
> you could just go source->display via separate shielded RGB signals. (The
> picture quality I've seen on the typical US setup is piss-poor compared to the
> UK, jokes about NTSC aside)
One reason for this, I susepct, is that before the common usage of SMPSUs
in TV sets, almost all TVs were live-chassis, with all the internal
circuitry directly connected to the mains. Very few UK/European sets had
an isoalting mains transdormer.
It;s is a lot easier to isolate a VHF or UHF signal (a couple of special
capacitors will do it) than baseband video/audio (which would involve
spectial transformers or opto-isolators at least). I've seen a few
top-end (B&) and the like) valved TVs (live chassis, of ocurse) which had
a special audio transformer to provide an isolated (from the mains) audio
output from the set to feed into a tape recorder or whatever. But it
wasn't common at all.
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