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Subject Author Date
coffee cup (mug) warmer Frank Thompson 05-09-2008
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Posted by George on May 9, 2008, 9:46 am
Joseph Meehan wrote:
> Running it on 240V would double the wattage (assuming you are now on
> 120V) but it also would likely burn out the element.
>
> Google or Frank would appear to be your best answer.
>
>
>> Been unable to locate 25 watt one. All the new ones which have little
>> more than half that wattage don't keep coffee hot enough for me. My
>> old Dazey 25 watt one did a great job, but it died. What controls
>> wattage? Would like to convert one of the new
>> lower wattage ones to 25 watts. What would I have to replace to do
>> that?
>
>
Doubling the voltage would increase the power by a factor of four
(P=(E)squared/R) because it is a square law function.

Posted by on May 9, 2008, 7:36 pm
> Joseph Meehan wrote:
> > Running it on 240V would double the wattage (assuming you are now on
> > 120V) but it also would likely burn out the element.
>
> > Google or Frank would appear to be your best answer.
>
> >> Been unable to locate 25 watt one. All the new ones which have little
> >> more than half that wattage don't keep coffee hot enough for me. My
> >> old Dazey 25 watt one did a great job, but it died. What controls
> >> wattage? Would like to convert one of the new
> >> lower wattage ones to 25 watts. What would I have to replace to do
> >> that?
>
> Doubling the voltage would increase the power by a factor of four
> (P=(E)squared/R) because it is a square law function.

The base equation is P=IE

Posted by terry on May 9, 2008, 9:51 pm
wrote:
> Running it on 240V would double the wattage (assuming you are now on 120V)=

> but it also would likely burn out the element.
>
> =A0 =A0 Google =A0or Frank would appear to be your best answer.
>
>
>
> > Been unable to locate =A025 watt one. All the new ones which have little=

> > more than half that wattage don't keep coffee hot enough for me. =A0My
> > old Dazey 25 watt one did a great job, but it died. =A0 What controls
> > wattage? =A0Would like to convert one of the new
> > lower wattage ones to 25 watts. What would I have to replace to do
> > that?
>
> --
> Joseph Meehan
>
> =A0Dia 's Muire duit

Never realised that coffe was such a dangerous substance!
But by the way; DOUBLING THE VOLTAGE!
Doubling the voltage (of a resistive device such as a heater) will
also double the current.
Twice the voltage and twice the current will result in FOUR Times the
wattage!!!!
Absolutely basic Ohm's Law; ....... Volts times Amps =3D Watts

Posted by on May 10, 2008, 7:54 am
> wrote:
>
>
>
> > Running it on 240V would double the wattage (assuming you are now on 120V)
> > but it also would likely burn out the element.
>
> > Google or Frank would appear to be your best answer.
>
>
>
> > > Been unable to locate 25 watt one. All the new ones which have little
> > > more than half that wattage don't keep coffee hot enough for me. My
> > > old Dazey 25 watt one did a great job, but it died. What controls
> > > wattage? Would like to convert one of the new
> > > lower wattage ones to 25 watts. What would I have to replace to do
> > > that?
>
> > --
> > Joseph Meehan
>
> > Dia 's Muire duit
>
> Never realised that coffe was such a dangerous substance!
> But by the way; DOUBLING THE VOLTAGE!
> Doubling the voltage (of a resistive device such as a heater) will
> also double the current.
> Twice the voltage and twice the current will result in FOUR Times the
> wattage!!!!
> Absolutely basic Ohm's Law; ....... Volts times Amps = Watts

You are confusing two equation here: P=IE (power or Watts) and E=IR
(Ohm's Law, volts=current x resistance)

Posted by DGDevin on May 9, 2008, 1:23 pm
Frank Thompson wrote:

> Been unable to locate 25 watt one. All the new ones which have little
> more than half that wattage don't keep coffee hot enough for me. My
> old Dazey 25 watt one did a great job, but it died. What controls
> wattage? Would like to convert one of the new
> lower wattage ones to 25 watts. What would I have to replace to do
> that?

Those things make me nervous. I bought one with two safeties, a switch that
turns it off if the weight of the coffee cup is removed, and a timer that
lets it run only so long even if there is a cup in place. But a CD case on
my desk ended up leaning up against the cup warmer when there was a mug on
it, melted the case and the CD all to hell, made me wonder. So now if I'm
going to take awhile to drink some coffee I'll just put it in an insulated
mug, less worrying.



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