Low Frequency Mains Noise
"Patrick Turner"
When I measure the "240Vac" here is usually is stable enough to get a
nearly constant reading on a DMM,
** Must be a basic 3.5 digit one ( 2000 count) with only 1 volt
resolution
when reading 240 volts AC.
Any DMM with a larger count allows changes of 0.1 volts to be seen -
then the last digit is never steady.
Indeed, I'll get 240.XX Vac maybe even 24X.XX if the voltage is just
either side of 240.0Vac.
That's less than 1% Vac change.
** Another completely irrelevant reply.
Yawnnnnnnnnnnnnnn ...
But it slowly varies between 235Vac on cold winter nights of heavy
loadings to 255Vac when load is light.
** What drivel.
Not so, this is without changing local loads here in my shed.
** Another irrelevant reply.
Rarely does the mains ever bounce rapidly between 235Vac and 255Vac.
** More irrelevance - since I never claimed it did.
It will instantly drop by 7 or 8 volts if you switch a ( 2.4 kW) electric
heater on AND jumps up by 6 volts when the ( 2kW) jug turns itself
off
when it has boiled.
Not necessarily so.
** Now that IS a blatant lie.
Anyone can try it and see what happens to the AC voltage on the same
circuit.
When I look at the rectified Vdc, it shows the expected variations of
+/- 30mV.
** Complete ********.
No.
** Another BLATANT lie.
Any unregulated DC supply FOLLOWS all variations in the AC voltage by
the
same percentage.
Agreed.
** Then stop posting ****ING STUPID **** that says otherwise.
You misunderstand me.
** NO - you completely misunderstand the point.
..... Phil
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