Buskers and electric shocks

[N_Cook]

Where they use 12V battery and inverter to synthesised mains and then
SMPS type amp. So the dirty-mains filter caps on the mains side have no
ground reference and all the grounded points including guitar metal
parts rise to some highish voltage until someone touches them and
discharges the caps.
Ignore it as not a personal safety issue unless the psychological shock
leads to problems.? Is there a work around, ie metal plate under the
amp, connected to an amp earth point and a cup of water on the
soil/pavement under the metal plate?

ps seventh attempt via e-S/Thuynderbird to s.e.r, uk.test is ok

 

[Phil Allison]

"Nutcase Kook "

Where they use 12V battery and inverter to synthesised mains and then SMPS
type amp. So the dirty-mains filter caps on the mains side have no ground
reference and all the grounded points including guitar metal parts rise to
some highish voltage until someone touches them and discharges the caps.

** Nonsense.

There is simply no supply ground connection so no path for current to flow.

Where does Nutcase Kook get all this fucking shite from ??




.... Phil

 

[[email protected]]

Well now I know what the word busker means. Damn US schools, oh wait, I never paid attention..... I was too busy learning shit....... (go ahead)

Anyway, the cheapest and easiest way I can think of is to just take the ground of the instruments' inputs and wire them to a wet rag laying on the ground, just fold it up and put the wire in between. Just pour water or beer on it from time to time, like when you are again getting zapped. Don't worryabout grounds on the rest of the shit.

BTW, isn't there some sort of 12 volt syatem that can eliminate all this extra bullshit ?

 

[N_Cook]

Well now I know what the word busker means. Damn US schools, oh wait, I never paid attention..... I was too busy learning shit....... (go ahead)

Anyway, the cheapest and easiest way I can think of is to just take the ground of the instruments' inputs and wire them to a wet rag laying on the ground, just fold it up and put the wire in between. Just pour water or beer on it from time to time, like when you are again getting zapped. Don't worry about grounds on the rest of the shit.

BTW, isn't there some sort of 12 volt syatem that can eliminate all this extra bullshit ?

In Car Entertainment stuff is not structured for use by buskers.
Otherwise off-the-shelf 12V "leisure" battery+inverter+SMPS+ClassF amp,
is the most weight efficient , cost efficient way of getting something
like 500 watts of power, but of course the amp is designed for mains
power use and so structured for use wuth a good ground/earth, not
floating around with the vagueries of weather

 

[N_Cook]

Perhaps a more convenient solution
fine wire copper or brass mesh from a hobby shop
Unscrew a rubber foot from the amp and wrap in the mesh.
Some shield from coax cable pulled and squashed flat
one end fitted under the foot and the other under a bush nut and glued
to the amp casing.
If exceedingly dry weather then some water /beer or piss under the foot.
Fine mesh, should the amp end up on a table top at some point

 

[Wond]

Perhaps a more convenient solution
fine wire copper or brass mesh from a hobby shop Unscrew a rubber foot
from the amp and wrap in the mesh. Some shield from coax cable pulled
and squashed flat one end fitted under the foot and the other under a
bush nut and glued to the amp casing.
If exceedingly dry weather then some water /beer or piss under the foot.
Fine mesh, should the amp end up on a table top at some point

I think its more likely an equipment fault putting mains voltage on
the instrument, possibly through a capacitor.
Charge 'em lots, Cookers, you put in a lot of effort.

 

[[email protected]]

Umm, they are geting charged, that is the problem