3 ms·
Event Horizon Telescope?
by lonelappde 7y ago
Event Horizon Telescope?
- natmaka 7y agoExtra High Tension From about ~10 kV in a B&W TV, up to 30 kV in a color TV. Non-neglectable amperage, therefore this is really dangerous stuff. Never tweak it when it is plugged in.
- blattimwind 7y agoActually the high voltage anode lead is very well insulated; if it isn't any more, you'll be sure to notice it quickly (smell, arcing noises and lights, TV stops working eventually). However, in a typical CRT drive circuit you still may find somewhat high-power 100-200 V DC supplies (for deflection drivers and also what powers the LOPT) and low power ~1-3 kV supplies for focus control and such.
- revax 7y agoDoesn't the (big) capacitors inside stay charged for a couple of hours after the TV being disconnected?
- hazeii 7y agoA decent TV/CRT monitor should have high-value bleed resistors to discharge the capacitors, but since high-voltage resistors cost money they probably stopped fitting them about the same time as TV's stopped coming with circuit diagrams.
- jandrese 7y agoEven if they are installed you can't know if the resister has failed open until you try it. Always assume the tube is energized until you've grounded it.