Re: Toaster Oven dimmer ?


Joerg wrote:
> Hello Darrell,
>
> > Your heating speeds seem reasonable. Mine is about 2C/second at room
> > temperature and 0.5C/second at 200 C. Xilinx recommends ramping up to
> > the peak temperature at 2-3 degrees C per second if I remember
> > correctly. I believe I would be in that range with the second element
> > since the decrease in speed is probably due to the poor insulation of
> > the oven.
>
> It could also be because of the large volume of the oven chamber versus
> limited heater power. Just like it takes twice as long to heat a room of
> twice the volume with a space heater of a given power, almost regardless
> how good the house is insulated.
>
> Unless you are talking about a different beast usually they design these
> ovens so that one or two regular size chickens will fit. I don't know if
> that would be safe: What if the oven were somehow modified to maybe a
> quarter of its usual height?
>
> Regards, Joerg
>
> http://www.analogconsultants.com

Before I bought the toaster oven, I had thoughts of making a very small
reflow oven using 4 500W halogen bulbs.

I would try to raise the floor, but the heating element is a single
300mm long quartz tube, and I am afraid that I would not get even
heating. I don't think any chickens would fit in this toaster oven. It
was the smallest one the store had and I chose it for that reason. The
label says 1350 watts, and I assume that would be with both elements
on. I have been using just the top element (broil setting). The oven
has no insulation (just 2 layers of thin *** metal). The outside gets
really hot.

Assuming I have 675 watts of power going in whenever the element is on,
I would estimate that I am losing about 500 watts of heat when the oven
is at 200 degrees C based on the difference in ramp rate. So I
effectively have about 200 watts going to heat the oven and its
contents. If I double the power to 1350W, I will still be losing about
500W, but 850W will be going to heat the oven which should result in a
ramp rate of around 3 degrees C per second. Maybe I will test that
theory out tommorrow if I have time.

Darrell Harmon

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