On Thu, 17 Jan 2019 09:19:06 +0000, Jan Panteltje wrote:

> On a sunny day (Thu, 17 Jan 2019 08:51:16 +0000) it happened Ahem A
> Rivet's Shot  wrote in
> :
>
>>On Thu, 17 Jan 2019 07:54:05 GMT Jan Panteltje
>> wrote:
>>
>>> On a sunny day (Thu, 17 Jan 2019 06:24:26 +0000) it happened Ahem A
>>> Rivet's Shot  wrote in
>>
>>> >        Neither do I provided they are used in such a way that the
>>> >        power
>>> >source and PSU do not move relative to each other. A flying lead to a
>>> >plug on the wall would be erm, foolish, as would using a PSU like
>>> >that without some kind of outer casing.
>>>
>>> You mean like this?
>>>  http://panteltje.com/pub/
h501s_drone_remote_power_lab_test_IMG_6271.JPG
>>>  http://panteltje.com/pub/
h501s_drone_remote_power_test_ground_control_1_IMG_6276.JPG
>>
>>        Yeah lab benches are the only place, not because it's safe but
>>because you know it isn't and the occasional belt is an occupational
>>hazard that you learn to avoid with (hopefully not too much[1])
>>experience.
>>
>>[1] A colour monitor anode supply was once nearly too much experience,
>>fortunately a manager[2] was between me and the wall three feet behind,
>>he went off muttering something about insurance.
>>
>>[2] See they're good for something.
>
> I worked in a TV studio for many years, also in TV repair.
> The danger was taking a CRT out (after discharging the HV),
> it then slowly builds up voltage again [1], and if you got bitten while
> holding it in your hands dropping it would cause an implosion and glass
> pieces would pierce you.
> We had an CRT implode all by itself, colleague heard a funny ticking
> noise, and decided that that was a good moment to go get coffee,
> when he came back the pieces of glass were sticking in the 1 inch thick
> metal armed soundproof studio door.
> Handling CRTs I have learned to control the 'drop it' reflex.
> Been bitten by that direct 25 kV several times, step aside, break
> contact.
>
> [1] possibly electrons moving via the aquadag layer, capacitors do that
> too sometimes.
>
> [2] https://en.wikipedia.org/wiki/Aquadag
>
> Anyways, raspies are safe :-) LCDs are sort of safe (if LED backlight)
> as far as HV goes.
>
> I still have a color CRT monitor in the attic, colors are better than
> LCD IMO, no burn in either.

modern CRT's are implosion protected, but i would still not want to
chance it.




--
Love and scandal are the best sweeteners of tea.

--- SoupGate-Win32 v1.05