oven Definition and 117 Threads

I removed the high voltage secondary winding of a microwave oven transformer and replaced it with 9 turns of wire I need 2.1 vac 50 amps. Should I remove the shunts? I have a 100a bridge rectifier I need 3 vdc 50a for about 5 to 7 days. I don't think a MOT is 100% duty cycle so I plan to use...

I was looking to get a reflow oven but now I am wondering if the same effect can be accomplished with a simple heat gun. It's a little extra effort, but not sure if the convenience of a reflow oven justifies the cost difference. I mean, it just has to reach a certain temperature right?

i have an oven fan motor and its rated at 15watts, is this output or consuption if its the output whats the efficiency, how many watts is needed to make it run at full capacity thanks i n advance

I just tried cleaning our new oven with the pyrolytic function. Incredible results and it certainly warmed up the house. But the intructions insisted that I remove all metal racks etc. I have to wonder why, bearing in mind that the temperature can't melt the stainless steel. This increases the...

FIGURE 5 shows an electrically heated oven and its associated control circuitry. The current, I, to the oven's heating element is fed from a voltage-controlled power amplifier such that I = EK1. A voltage, VD, derived from a potentiometer, sets the desired oven temperature, TD. The oven...

I recently made a repair to the door switches/bracket on our microwave oven (MWO). All is well, but later, after reinstalling a trim piece and checking the fit, I noticed that with the door closed and latched, that there was a bit of play (1/8"?) - I could push the door a bit further closed, and...

Hi, A little background before my question: I read that microwave oven frequencies are at 2.45 Ghz, or about a 12cm wavelength. Lately, 5G is using frequencies called millimeter waves, and these frequencies can be as high as 40Ghz. So, linguistically to me, it seems as microwave oven waves...

There is no possible measurement, no matter how clever, that can measure the one way speed of light. It is a synchronization convention. In this topic I would like to apply this idea on a specific case. I have a microwave oven with width L. In this oven I have a standing wave. $$E(t,x)=E...

That is how much more power would it consume if one was to try and produce the same amount of heating power with just the waveguide holes and no walls, so no reflections?

Following on from the recent discussion on the gap size in the metal grill covering the door of a microwave oven, I thought up a way to actually enable one to see some of the standing microwave patterns going on in a typical oven . I bought a 20” x 20”cobalt chloride soaked cloth from Amazon...

Hi. I've just read that microwave ovens were invented 75 years ago. The article mentions the following anecdote: Apparently, Percy Spencer discovered the heating effect of microwave radiation when a magnetron nearby melted a chocolate bar in his pocket. Is this story plausible, wouldn't you...

Disclaimer first: Though the question is around cooking, IMO it certainly is to with physics / engineering. Yet, if the admins find this post inappropriate, pl. delete it. I am planning to make some rice cakes which is prepared by steaming a mix of rice powder and water. Because I don't have...

A DI-149 data acquisition module was used to record a microwave oven transformer (MOT) primary voltage and current time histories. The secondary of the MOT was open. The DI-149 analog input specs are: +- 10 volts full scale, 5000 samples per second for each channel (assuming two channels being...

So I know it's generally not a good idea, but I wondered what actually is the limiting factor. Does the magnetron heat up much more quickly? - and if so what's the physics going on that's causing it to heat up - is it increased current in the resonant cavities ? Also is it bad for the cathode...

The last couple days at work, one of the microwave ovens in the kitchen has been acting strangely. Today it seemed to get potentially dangerous, so I marked it "Out of Order" for now, and would like to figure out if it is hopeless, or if it can be recovered easily. I first noticed a couple...

I am working at retrofitting a microwave oven to produce steam for my 3 HP steam engine/generator. I have read estimates of 50-70% efficiency, but I am trying to verify those figures. Can anyone point me in the direction of calculating the efficiency myself?

Photons are point-like particles with no size, but they have different frequencies. Photons with certain frequencies (like microwave photons) can not pass through the holes of the mesh on a microwave oven, so this confuses me. Photons seem to act like they have size at low frequencies. I have...

Question of you radar guys.. My 14 year old Panasonic Microwave Oven suffered a magnetron end cap failure it commenced arcing and melted off a corner. I noticed it's not sealed, brand new ones have a hole in the end ... so I'm wondering just what does the endcap do ? I find plenty of...

Some fireworks in our microwave from peeling paint got me thinking... If you place a fork inside, arcs will form between the tines. Why? Presumably the EM field is inducing different potentials on each tine, and the pointiness concentrates the field enough to exceed the breakdown voltage there...

Before we start, this transformer will be used in a closed shop, on a clear bench and via a remote switch. I will be in full view of the setup. I hope to try some Lichtenberg patterns. I see that the secondary, c. 2000V winding is referenced to the transformer core. What is the purpose of...

Since the wavelength microwaves used in microwave ovens have a wavelength of 12cm, why are the holes in the grid behind the glass so small? If they were 12cm would the microwaves still stay confined? If the small holes are only to "play it safe" that seems irrelevant since microwave has a...

Is it possible, and if so, how should we modify a typical oven magnetron so as to produce higher frequencies of EM radiation?

Hello, I want to convert gas unit into oven temperature (Fahrenheit, Celsius). Which formula I can use? Also I want to know at which oven temperature we can assume it as moderately high or cool temperature??

Hi guys, If i put mobile phone into micro oven, Is this prevent mobile signal

I recently talked to a friend of mine about microwaves. Specifically that (to my knowlege) the microwave radiation is primarily absorbed by a rotational degree of freedom of water molecules. Which got me thinking. 1.First of all what would happen if you put a extremely cold ice cube ( with no...

I'm sorry to reopen the debate on what happens when I put a light bulb in a microvawe oven, but the question is driving me crazy. I'm debating with other students about "why I light bulb lights up when I put it in a microwave oven ?". I read the old thread posted in 2003...

Does the frequency of the main affect the performance of a microwave oven? Having moved from Europe 50 Hz to the Philippines 60 Hz I can not operate my microwave oven! Is that the reason? How to remediate? Best regards.

Hi, I’m new here and come to ask you for some help. I would like to ask you to give me a few examples of automated sample extraction from laboratory oven for mechanical properties testing. It could be in form of scientific articles, videos or anything else, where something like that might be...

What is the main determining factor in determing the watts in a MWO? I'm not asking how it is measured I understand how to do that, I'm asking what the engineer uses to determine it. Is the output voltage of the transformer more responsible than anything else? It seems they all put out the same...

Dear friends! What is your openion about validity of the following information: " When was the last time you checked your microwave for radiation leakage? Yes, I did say radiation leakage, because any microwave can start leaking radiation any time, for whatever reasons. And such a leakage...

In the lab where I work, we usually use stir/heat plates along with magnetic stir bars to heat our compounds simultaneously. However, in terms of achieving a specific temperature range, the stir/heat plates are not ideally suited due to random fluctuations from being open to the air. Therefore...

Haw can I calculate/estimate the potential gas consumption in an industrial oven after the reduction of the temperature setting point?

Homework Statement Consider a evacuated long metal tube of length 'l' and diameter 'd' containing a metal source at one end. The metal source is connected to an oven and emits gaseous metal atoms in all possible directions. If an atom hits the walls of the tube, it will get stuck and will not...

So, I'm new around here and I'm not entirely sure if this is in the right section, but today I noticed something which I found thought-provoking. Before I go into this, I should point out that I'm 16, so all of my physics knowledge above high-school level is entirely self-taught, so I still have...

I saw this thing on Kickstarter this morning and I have to say it's pretty awesome. The structure of it is pretty cool and the end product looks delish https://www.kickstarter.com/projects/1906570847/mighty-pizza-oven-2-mpo2

If I throw 10 gallons/minute of cold water for 4 days into an oven that's 300°C Celcius and 300ft long sloped at an angle of 10°, how far would the water make it down the oven before completely evaporating? Even if you can't solve this directly, I'd love some advice or recommendations of how...

Can an aging microwave oven reaching the end of it life result in a change in its power draw? I've had this microwave for many years, and I know they do wear out, but it has begun blowing a breaker when used. I can't think of any changes to our electrical draw in the house that might affect it...

I have a need for a microwave oven which uses a specific wave length to heat a specific part of a composite sample more than another part of the sample. Normal microwave ovens have a random frequency and amplitude and the frequency is not adjustable. A radio like a short wave radio would...

Dear friends; People say that using of Microwave oven is harmful for human body as the high frequency raise of microwave oven destroy the internal structure of food. Some people say that the person who daily use the microwave oven, can be faced blood cancer. Please share your comments as now...

Our Panasonic has finally given up the ghost, with a broken internal door catch mechanism. I have a go at most things but I really believe this one is not 'user serviceable' (:cry:) Time for a new one and I can see advantages in using a flat bed model. We had one without a turntable, several...

The rms speed for a particle in a gas can be calculated using the formulae: u_{rms}=\sqrt{\int(u^{2}n(u)du)/N} a) Use the formulae and the expression for n(u): n(u)=(\frac{2^{1/2}N}{\pi^{1/2}})(\frac{m}{k_{B}T})^{3/2}u^{2}exp(-\frac{mu^{2}}{2k_{B}T}) To estimate the rms speed of Ne...

Got the following from a friend who teaches HS physics... Measuring the speed of light with chocolate and a microwave oven http://morningcoffeephysics.com/measuring-the-speed-of-light-with-chocolate-and-a-microwave-oven/

I don't really know how to quantify EM waves when it comes to amplitude, but I understand that MRI rf waves are measured in units of tesla. What is the amplitude of a typical microwave oven EM wave in Tesla (mT, uT)??

Would it be incorrect to assume the amount of heat gained (ΔQ) for a sample of water in a solar oven would be the same for any substance in the same solar oven at the same time?

The question is basically asking what method of heat transfer is MOSTLY responsible for heating a pizza inside of a brick oven. So from what I understand, the majority of the heat is coming from conduction-through the bricks themselves. Since the questions states that there is a chimney...

Today at my university I melted a zirconium sample that was into a "home made" oven that makes "sparks". I don't remember the name of the type of oven. The mechanism is to put a sample into the oven. Hmm I don't know how to explain the rest in English... Basically you create a continuous...

You have a butane torch and an oven. Two scenarios: 1. Butane is burning in an oven heated to 200 C, does the burning point of the butane change at all? 2. Butane is burning in an oven heated to 2000 C, does the butane have a cooling effect on the oven? The burning point of butane...

Hi there, I'm looking to find the most probable speed of atoms ejected from an oven. Temp (T) is 900°C (so 1173.15K). The material is aluminium with molar mass 0.027kg mol-1 I've got the formula vmp=√(2kT/m) I'm fine with everything above, but I'm not sure what value to use as...

I do not understand why ferromagnetic materials are more easily heated by an induction oven than a non/low ferromagnetic material such as copper or aluminum. Are Eddy currents more easily induced into a ferromagnetic material than a conductor lacking a high ferromagnetic property? Why is it so?

I'm curious how heat transfers between the heating element in my electric oven and the air in the oven. Say when I first turn on my oven the air is at room temperature (say 70F) and the surface temperature of the heating coil is at say 500F. After some time passes, the air in the oven rises...