[mythtv-users] OT - Life without MythTV

Ronald Frazier ron at ronfrazier.net
Mon Feb 25 20:32:12 UTC 2008


>  Be very careful, make sure you discharge the HV before putting your
>  hands inside the unit. There are capacitors that can hold a charge for
>  many minutes after the set is turned off.

The commonly circulated rumor is that the charge can be powerful
enough to be lethal. However, I found the following on wikipedia (make
of it what you will):

"Smoothing of the EHT was then done with a high voltage capacitor,
external to the tube itself. In the earliest televisions, before the
invention of the flyback transformer design, a linear high-voltage
supply was used; because these supplies were capable of delivering
much more current at their high voltage than flyback high voltage
systems – in the case of an accident they proved extremely deadly. The
flyback circuit design addressed this: in the case of a fault, the
flyback system delivers relatively little current, improving a
person's chance of surviving a direct shock from the high voltage
anode."

I'm not really sure how to take the phrase "improving a person's
chance of surviving" :-)


-- 
Ron


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