[Boatanchors] More question on US AC voltage

[Sheldon Daitch]

Aren't we dealing with the same concern, when we worry about the
line voltage into some of the boatanchor equipment, from heat rise
due to the higher line voltages?  Some of the R-390 discussions
involve the extra heat from the use of the equipment on higher
voltage lines,

If the line voltage increases within the operating range of the
equipment, then it would draw slightly more current, assuming
the resistance (impedance, actually)  of the equipment does not change
with voltage, or it does not have self adjusting power supplies.

If you change the voltage from the nominal 115VAC to 230VAC,
you normally have to change the transformer taps on the
equipment, so then the current draw is, in theory, half on 230VAC
vs 115VAC, and the power drawn remains roughly the same.

So, in the context of doubling the voltage, not small increases
in the operating range of typical transformer operated equipment,
Paul would be correct.  I think he should have added something
to indicate the doubling of the voltage with the proper adjustments
to the equipment to reflect the doubled input voltage.

73
Sheldon
WA4MZZ



James Duffer wrote:

> Poor ole George Simon Ohm is probably rolling over in his grave!
>
> snip
> >I do not believe this is correct. The devices in our homes draw a set
> >amount of power, measured in watts, to function. Our electric bill is
> >based on kilwatts times hours, so the bill would not vary.
> >
> >With a higher voltage, we would simply draw less current from the line:
> >Watts= Volts X Amps
> >Raise the voltage, lower the amperage (current draw,) but the
> >kilowatt-hours stay the same.
> >
> >73,
> >Paul K4PDM
>
> _