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microwave oven repair?

Question by cosgan    |  last reply


Scraping a microwave oven for parts

I just got a microwave oven from the scrap yard any one know how to dissassemble it safely? Also does anyone have any ideas on what I can use some of the parts for?

Topic by jackillac92    |  last reply


Looking for a glass turntable for a GE microwave stainless steel oven

Looking for a glass turntable for a GE stainless steel oven Model # JES 1142 SJ .Could you help withlocating this part as well as the cost?

Question by trinidaye    |  last reply


230V 50 HZ Microwave does not heat with my 230V 60 HZ Power Line Supply

My brand new European oven that I bought did not heat from day 1. The table turns and the grill works, but the microwave function does not. I know a little about the HV transformer, the capacitor and diode and magnetron. What could be the problem ? If the line frequency is the cause what can I do to convert it ? maybe change the capacitor for one of lower capacitance ?

Question by spin707    |  last reply


Microwaving Dough

If I was to make a batch of cookie or biscuit dough, could I cook the dough in the microwave, as opposed to the standard oven? Would the dough cook normally? Thanks!

Topic by Bran    |  last reply


microwave oven capacitors for sale

I have some microwave oven capacitors and  transformers that I would like to trade or sale. Iam interested in radio parts ( crystal head phones, vacume tubes ect.) I just don't have money for shipping

Topic by inductionheat!    |  last reply


Microwave Oven Transformer Stack

This is my Microwave Oven Transformer stack. It is currently current limited using a heater. There is approximately 10 36 watt 4' fluorescent tubes in a string around my garage that I am lighting with the MOT stack .My MOT stack contains 4 Microwave Oven Transformers connected with their outputs in series and their inputs in parallel. They are mounted on plastic cutting boards. I am using threaded rod to hold the layers in place while the PVC pipe covers the threaded rod and it also supports some of the weight. The output of this is approximately 8800VAC at 350mA The Input voltage is 240VAC Thanks for looking, Please comment and remember to rate if you like it! Just say if you want any pics of a certain thing, e.g. the MOT stack arcing to wood/metal etc. (I will try to get more pics of it arcing soon but it is hard to use a camera that has like a second delay before it takes the actual pic from when you press the button, stupid camera) ********************************************************************************************************** Edit The new pictures are of an arc between two carbon electrodes. The other pictures are of 12 fluorescent tubes connected in series but arranged in parallel so you can see them all

Topic by thermoelectric    |  last reply


Microwave oven metal foundry?

Can you melt steel scraps in a heat resistant pot hot enough to mold or pour with a rewired MOT? What if you put multiple MOTs in series/parallel? how could you make into three phase (i want to know weather this works or not)?

Question by Jimmy Proton    |  last reply


Microwave oven welders for $50

I am selling microwave oven welders like the one in the link below, https://www.instructables.com/id/Build-a-Microwave-Transformer-Homemade-Welder/ the reason I'm selling these home made welders is do you know how much work it takes to build one and make a nice case for one, HA! have fun, but for those of you who don't have the time or patients to build one, then BUY ONE! there's alot you can do with onethe scech of the welders I am selling is the PDF below SORRY I DONT HAVE PICTURES YET!the speck's for them are about 70 AMPS (I'm leaving extra space so when I figure how to get more AMPS,there can be just another part installed and you have more AMPS) and for a little extra money you can have it so you can vari the AMPS ( about $20)its air cooled PRICE! for one of these welders is $50 AND $20 for the vari AMP

Topic by Danielro10  


How do I use new chip-style microwave oven transformers ?

I'm working on a microwave oven transformer based AC welder. Newer microwaves don't use classic steel and copper transformers but rather something much lighter with a few beefy electronics that look like transistors. My question is how does one manipulate these new-style electronic trasformers (if that's what they're called)? Imagine all the wonderful things one could to with such a light-weight but powerful circuit. Maybe it could run a laser, welder, or do voltage boosting for renewable electricity systems with long cable runs...

Question by snotty    |  last reply


SSTC using microwave oven inverter?

I recently obtained a microwave oven inverter and I've been doing a lot of research trying to figure out how to power it. The microwave I found came with schematics and a decoder for the button membrane so I am able to operate the main control board and the MICOM board outside of the unit (with slight modifications) but I have yet to test the inverter in fear of blowing it up. Currently my question is can I build a 555 PWM to cheat the CPU or bypass it completely? if not then I suppose I could use the microwaves original circuitry to do so but I'd like to build a nice solid state tesla coil with it if possible.  Instructables is being retarded and wont let me add notes to my pictures  image one - Main control board to the left, MICOM control board in the middle, Iverter on the right image two - Slight modifications to power the board outside of the microwave image three - Used decoding chart to operate main circuit without button assembly image four and five - Showing the output of the MICOM board going to the CPU on the inverter and settings of Oscope (channel A)

Question by Jimmy Proton    |  last reply


MOT ( microwave oven transformer) help Answered

OK, i just pulled this huge transformer out of a microwave today and was just wondering how on earth to hook it up. Pictures below. so please help. And sorry about the pictures being sideways. The bolts you see are on the bottom.

Question by budhaztm    |  last reply


Microwave stopped heating and I fixed it.

Our microwave is about two years old and it stopped heating. The fan ran and the carousel went around, but food did not warm. I took it out of the upper cabinet mount and opened the case. I know about the big capacitor and discharged it with a screwdriver after disconnecting the power. For extra safety I clipped a jumper wire on both terminals. I watched numerous videos at YouTube on troubleshooting a microwave and on testing the various major components at home, but no component showed any signs of failure. Then it began to work again as suddenly as it had stopped working. About ten days later, it stopped heating again. After more testing, still no components showed signs of failure. But, I did squeeze the female spade crimp connectors a little with a pair of pliers before connecting them again so they fit more tightly when reconnected. The microwave has continued to work as it should. My wife remembers a time a few months ago when she ran it and ran it to get something to cook as she wanted it and the microwave stopped because it was overheated. I suspect a connection was weak and heated the metal in the connector enough that it became weak. Later it failed intermittently. We could have called warranty service, but we did not want to wait. Knowing what I know now, I doubt a serviceman would have patiently checked for weak connections, but would probably have simply replaced some parts. When those did not really solve the problem, the microwave would have been condemned and replaced. A replacement oven may not have matched our other appliances as well as our present microwave does. Test procedures for components in a microwave are different than they are for similar components used in (for example) a sound amplifier. This applies especially to the high voltsge diode. Do not connect a voltmeter to the high voltage side of the transformer. When running the microwave, be certain to have a dummy load in the cavity, like a cup of water. A very useful test that checks for power to the transormer primary is to disconnect the primary side transformer connectors and attach aligator clips from a voltmeter to the transformer leads. Then run the microwave for a few seconds and check for a full line voltage reading each time. A clamping ammeter to measure line current helps because the sound with the magnetron working is not too much differnt from the fan and carousel running without the magnetron working, but, it is easy to see the extra needle deflection when the magnetron is also drawing current.What seemed to be an expensive problem had an easy inexpensive solution.

Topic by Phil B    |  last reply


Using a microwave oven's timer as the mains timer switch?

I have a timer switch from an old dead microwave oven. Can I use it as the mains timer switch? If yes, how do I connect it. The timer looks exactly like what is shown in the following picture: http://hackadaycom.files.wordpress.com/2013/09/mads-microwave-teardown1.jpg (The picture was not taken by me. It is from an article on useful things that can be harvested from  dead microwave oven.) Also, if possible, please mention the functions of various pins or give a link to an explanation.

Question by raftor    |  last reply




How to wire an MOT to have resonance

So I have two Mots One is bigger and another is smaller .. just in case .. and they both have the same wattage.. just letting you know just in case that's relevant.. also I have 3 MOCS or Microwave Oven Capacitors .. How Exactly would I wire it for resonance.. please no schematics .. just explain visually or textually but with as much detail as possible ..

Question by TaeronR    |  last reply



How to silence the buzzer on my microwave oven?

No visible mechanical buzzer. Seems to be one of the little boxes that is attached to the circuit board. I know nothing about electronics. Don't want to kill myself or ruin the microwave, but that damn buzzer is driving everybody crazy! Help!

Question by melnel    |  last reply


Space power plant

International project. Space station. Geostationary earth orbit. Solar energy flow. Microwave oven generator of big power. Transfer to Earth of energy in the form of a beam (microwave oven beam, microwave oven energy). Geographical point for reception of a beam - the desert. On Earth of the microwave oven energy will be transformed to electric energy. It is offered to discuss this project!

Topic by Vladimir2016    |  last reply


Why does my MOT get so hot when nothing is connected?

Hello, I have a rewound MOT (230V input and 9-50V output, different custom windings) and I'm wondering why the transformer gets so hot when no load is even connected? Is it normal that MOT's get so hot quickly because the primary impedance is just so low? and how do they fix this problem when the MOT is still inside the microwave oven? Because there, it does need to be able to run for hours. I've read about ballasting the MOT, but I thought that was only for current limiting, when you Are attaching loads on the secondary? Greetings, Electorials

Question by DELETED_Electorials    |  last reply


is it true that microwave ovens are bad because of the radiation it emits into the food? Answered

I am afraid to use the microwave oven much because overusing it can possibly cause health problems in the future because of the radiation that emits into the food.  So I mainly use toaster ovens. should i be concerned, any experts in this field?  thank you.

Question by smaxx    |  last reply


Checking electric on an oven

I have a problem with my oven which is tripping the fuses. It has a grill, top and bottom heating. I have diconnected each of the elements and think I have isolated it to one of the elements. I have removed that element and find, I can get a continuity reading across the two in put terminals, which I guess just means it is intact. However, I get a low reading across the earth and one terminal. Can anyone tell me if that is what I should expect? It's so annoying as I have had the oven almost 5 years (new with the new apartment) and this is the first time I have tried to use it. Previously I just used my combi microwave. Thanks for any advice.

Topic by johncar    |  last reply


How can I build a 220V welder using 220V microwave oven transformers? Answered

I read TimAnderson's Instructable on building a homemade welder from microwave oven transformers, but that instructable is for a 110V setup, what should I change to make it work using 220V transformers on 220V. (I already gathered all the materials...)https://www.instructables.com/id/Build-a-Microwave-Transformer-Homemade-Welder/ ....Link to TimAnderson's homemade welder?

Question by inserbot    |  last reply


What is this weird transformer?

I opened up a microwave hoping for a microwave transformer. But instead i got this weird looking one. i was hoping someone may be able to identify it and tell me if i could use it for a tesla coil. also, there was no capacitor??!! the largest caps i could find were those three red ones in the pics. it apeared to have litz wire on the outside and normal wire wind on the inside. Numbers in it were - 97INV (im not sure if its a 1 or i)   and F69144TOAP and finaly   F607C.  Update:  ive now taken it apart, see picture. so, im guessing the litz wire was the primary (240v) and the solid wire is secondry (around 2kv). the secondry contained one really long winding and then another winding which only went around once (like in a normal mot). It looks like some sort of high current flyback. also, the secondary is also some kind of litz wire. It has many smaller hair thin enameled wires woven into a single strand. My guess it this thing operates at really high frequencies

Question by makincoolstuff    |  last reply


Request: DIY Portable Microwave

I was looking around and was hoping to find somewhere a guide to make a portable microwave, I have looked around on the internet for hours trying to find a DIY one because I want to make it myself rather than buying one.  What I am trying to do is find a way to make a microwave portable.  I wouldn't be making the actual microwave though, I would just buy one that you guys would hopefully suggest for me to buy.  The purpose of this is to have a microwave that I can put inside of a locker for cooking food in.  I just need someone to guide me through because all I learned through my searching was that I possibly needed an inverter, due to it being battery powered (I assume.)  Then again aren't there car batteries that can run on AC like a microwave, although I am not sure which is why I am here.  Summary: What I am asking is someone to make a step by step tutorial or guide of some sort to making a microwave portable (not building the actual microwave though, just making one portable to be runnable by like a car battery)

Topic by karatetoes    |  last reply


How To Ballast An MOT

I'm wondering how to ballast an MOT... I only have 2 and I want to use one as the ballast .. how would I wire it so the other one will work As a ballast.. please no schematics I'm not good with schematics but I am with the basics .. just visually instruct me on how to please .... or with as much detail if you explain in text .. btw one is bigger and the other one is smaller..

Question by TaeronR    |  last reply


Help! Magnetron in microwave oven makes jackhammer noise.

My microwave oven was out of order, it kept blowing up the power fuse; finally the trouble was traced to the power capacitor that was shorted. So, the power capacity was changed and the oven worked again, but now the magnetron becomes noisy with a jackhammer noise when it is working. This noise starts when the magnetron starts working, but it stops after some two minutes while it continues to work up to the time adjusted for it to finish its operation. What has happened to the magnetron? Is it possible to fix it? On the other hand, it is my best suspicion that it is the magnetron that is making the noise and not the transformer. What is your experience in this situation? This is exactly the sound (click on the link below) I am getting from my microwave oven, but it does not go and on until the machine turns off; the sound stops some two minutes into the operation, and the remaining time there is no longer the sound or noise – for the remaining time it keeps ‘quiet’ up to the completion of the time period it has been adjusted to operate, or I turn the switch knob to off. https://www.youtube.com/watch?v=CF0RXKF4puQ Thanks for any help or information.

Topic by Marius de Jess    |  last reply


Can I modify a Microwave Oven Transformer into high voltage?

Can I modify a Microwave Oven Transformer into high voltage? I had a MOT. secondary coil: 2kV output I heard some people in internet were modify the MOT into high current Can I modify the MOT Primary Coil into a few turns. Just like this formula : Vs/Vp = Ns/Np The original is : Vs/Vp = Ns/Np      2000/220 = 2000/220 In my imagine : 30 turns heavy primay New one : Vs/Vp = Ns/Np       Vs/220 = 2000/30     Vs=14 666.6667 Can I do this?????????????????????

Question by james34602    |  last reply


Can I modify a microwave oven capacitor (MOC) for a higher working voltage? Answered

If I was to open a MOC and poor oil into it would it be able to withstand a higher voltage? If so how high do you think? And how would the capacitance be affected? 

Question by The MadScientist    |  last reply


Microwave Oven Transformer arcs too small- about half a millimeter

I have two microwave oven transformers (MOTs) that I am currently working on, and I have taken one of them apart to make sure of the wiring of the coils. I am fairly confident in the wiring of the whole system. I have the original primary and secondary coils, both made of copper. The transformer is one of the larger ones I have seen, and its wattage at about 1000W. I know it is not popping the breaker because the hum is always on. I have read through many of the instructables out there about MOT's, so I understand it pretty thoroughly, but the arcs on the instructables I've seen are several inches long, and my arcs are about half a millimeter. I really wouldn't call it an arc at all.  I have the common wall output of 110 VAC, 60 Hz going into the primary coil, and the ground is attached to the MOT block itself. One of the secondary output wires is connected to a capacitor bank of 3 MOC's in series, and I have the other output on the end of a PVC pipe which I touch to the opposite end of the capacitor bank. What am I doing wrong? 

Question by Technicolor    |  last reply


induction "furnace" from microwave transformer?

Hey guys I've seen around the net that it's fairly easy to make a spot welder from a micro wave transformer /micro oven transformer. So I was thinking if it's possibly to use the same idea to make a induction furnace? I would like to use it for melting/ casting aluminum (...and possibly metals with a higher melting point... if possible) any idea if it's possible.. and how to?

Question by lordl9999    |  last reply


Have you ever had a microwave oven talk to you before? Answered

Mine likes to say, "Hi." A picture of this is attached.  There is indicator light that says, "Hi." When my microwave says, "Hi" to me, I say, "Hello! Hello microwave oven! How are you today?" And it just keeps saying, "Hi, Hi, Hi," until... it is done cooking. When it's done cooking it makes beeping noise, and then it tells me what time of day it is, and then it acts like a clock, telling me the time of day, and it keeps doing that until when I tell it I want to cook something again. I wish a happy, happy April Fools' Day unto everyone!!!

Question by Jack A Lopez    |  last reply


Why does my MOT have a wire from the HV coil connected to the casing? Answered

Hello, I'm busy with making a spot welder from a MOT (microwave oven transformer), but I'm not really sure why and how to ground the MOT. In the picture you can see that a wire from the high voltage coil is connected to the casing which I find to be Really odd. That wire is not really a problem since I'm going to remove the secondary windings, but I'm just interested in an answer to that. Another question is, is it necessary (for performance) to have the MOT grounded? or is it Only for safety that the casing needs to be grounded? (no matter what the answer is, I'm still going to ground it, so it's not necessary to have safety discussions here) thanks in advance, Electorials

Question by DELETED_Electorials    |  last reply


i bought 3 microwave glass trays / plates at a yard sale, how do you determine what models they go to?

I bought 3 microwave glass trays / plates at a yard sale, how do you determine what models they go to? i tried typing in what information there is on the glass plates but it didn't reall help, what do you think?

Question    |  last reply


How can i keep my MOT from drawing to many amps and why dose it heat up so much when I draw arcs?

I just made a 3 phase MOT power supply and it's fun to play with (while being safe) but every time I use both phases it trips the breaker after only 2 arcs, sometimes it trips just from plugin it in, I am using a PFC cap on the mains side as well as a long extension cord, I have one of the transformers ballasted, and one of them has 3 MOC's in series on its output, the breaker can handle one of them just fine...for a little while. Is there any thing else I can do besides buying a bigger breaker switch? I'd say mine is 20A but i dont know for sure.  Every time I draw arcs from my MOT it heats up really fast really hot, I am using the same setup as above , the only thing I can think of is to submerge it in oil but I dont want to do that because I'll want to make changes to it. What makes it different from a welding transformer in that they are made to draw arcs from but when you draw an arc from a MOT its a direct short and will eventually destroy the transformer?

Question by Jimmy Proton    |  last reply


Computer UPS backup transformer into an welder OR spot welder ??????

I have some transformer from my UPS. i want to make it welder.. watch this videos.. Do not talk about microwave ovens transformers . i don't have microwave transformer. can we make it ??? 

Topic by ishan udyoga    |  last reply


How to make a MicroWave Based Termite Eradicator?

Hello All, I need help in constructing a microwave based termite eradicator using parts from a old working Microwave oven. I understand that this is a project involving serious voltages and the effect of Microwaves is also there so without compromising safety how this can be done.The idea is to eliminate/ kill all termites which have affected some parts of cupboards (made out of Ply board), without having to remove or reconstruct the same. We create this gadget and keep the magnetron or the required electronics inside the cupboard near the affected areas and after due precautions, it is powered on from a long/safe distance, only for a few seconds, which I believe would be good enough for eliminating most termites. This method repeated at say 3 months would ensure termites would not attack the furniture ever. Eradicating a colony may not be possible in our area as there are large open spaces all around and exact location of their origination is difficult to locate. Beside repeated chemical treatments is not yielding the desired results. I have read at a number of website specializing on termite or pest removal about the microwave technology for the same. I hope we would have enough guidance here and this kinda project would help a lot of people getting rid of a huge menace in their living spaces. GSK

Question by GSKhurana    |  last reply


Need HELP with mod !!!

I need help powering a timer I salvaged from a microwave oven. Here's the schematic for the board. It needs a -5v power supply. I have a 9v battery and a 7805 regulator. Can anyone help me figure out how to make this thing work?hi-res schematic

Topic by mrshow555    |  last reply


Recipe for tapioca pearls? Something that doesn't require an oven...(but no bubble tea)

I have a 400g packet of small (2mm diameter) tapioca pearls that I would like to use up. I have a gas stove, no oven, no microwave so I'm looking for some kind of stew or salad recipe,  or just anything that I can cook on the stove top.

Question by BlueberryCrazy  


how can I convert an ac welder to a dc?

I have a microwave oven transformer welder that I made and it works ok, but I woul like to convert it to dc. Any information will be appreicated. Thanks

Question by sakimoto    |  last reply


Material to retain heat

Hi everyone,: I thought of something I could make for an Instructable. To keep the idea until I publish, I'll exclude the actual idea. I need a material for this project that will retain heat from a microwave oven for ≥20 to ≥30 minutes, Ideally Id like to keep the Temp around 180 degrees Fahrenheit. What can I use for this? We all know metal cant go in the microwave. Ideas??Thanks,Jari

Question by Jarib123    |  last reply


How to ballast an MOT with another Mot and have it to have resonance at the same time?

So I have two MOTS and 3 MOC'S (microwave oven capacitors) and I'm wondering how I can wire it to be ballasted and to also have resonance at the same time.. If that's possible.. Because I'd like to have it ballasted but ballasting limits current which in turn gives you smaller arcs so I want to wire it to have resonance so I can have big arcs while still having it ballasted.. Someone please help quick!..    To make it simple I wanna know how to wire two MOTS to be ballasted and also have resonance.. An idea came to mind if I have two MOTS I can wire one to act as an inductive ballast but Idk how to so that's why I came here but I could do that after I figure out from you guys and then maybe I could use one capacitor to act with the inductive ballast and use the capacitor as a second ballast for capacitive ballasting go work along with the inductive ballast.. Anyway Just help me with wiring it to be ballasted and how to wire it to have resonance while ballasted.. And if I can use both the 2nd mot and the capacitor to both work as ballasts at the same time.. Thank you c: No homo but much love if you take your time to help me c; <3 P.s.  Both MOTS are atleast 1000 to 1100 watts and let off 2000 volts minimum and atleast 20 to 30 amps when arcs are being made because my circuit breaker always trips on the wall panel with all the breakers to everything in the house and capacitors are atleast 0.80 to 0.98 uF.. And have a max capacitance of 2000 to 2200 volts minimum.. I can't afford my own circuit breaker to wire to any of the MOTS nor thecapacitor s and can't afford a wall plug thing to wire to a switch either.. So limited on some things..

Question by TaeronR    |  last reply


I want to bend some clear crystal polystyrene, how do I do it?

Poly is from CD jewel boxes. Need to bend to a curved aerofoil shape. Hair dryer? Microwave? Oven? Any ideas welcome. Ray

Question by RayArdia    |  last reply


need help on quick and easy snack recipe Answered

I basically want to make a short and fast snack that requires minimal ingredients, and only needs a microwave or toaster oven to bake if needed. i have very little cooking power, and being ak id i don't trust the stove and oven to much... i don't care if it's sweet, salty or (my favorite =P) spicy

Question by DELETED_15zhangfra    |  last reply


Can I use a MOT(with rewound secondary) as a power supply? Answered

Hi, I just found a MOT from a discarded microwave and was wondering if I rewound the secondary winding with a thicker wire (to get about 12V or whatever i need) would this be a good power supply for like an amp or other stuff (well it's a simple transformer (or is it?) i don't see why it wouldn't be, but before i mess with it i thought why not ask.) Also there was a sticker on teh microwave that said 700W and i wasn't sure if that is the power of the transformer or the Magnetron. Thanks in advance. Oh, and sorry bout me bad Engrish.

Question by T0C    |  last reply


Could you weld with an induction cooker? Answered

Having seen the microwave transformer welding kit and similar projects I started wondering about this one... Induction cookers are basically one side of a transformer and usually just dissipate current in to the pot to heat up the pot. But they've a high number of coils and I've seen them rated at 3000 watts, so if you made a coil that was a few turns of thick wire to be the other side of the transformer you'd possibly be able to have a huge current low voltage supply similar to the microwave oven welder. I imagine there'd be safety devices that may need disabled but the idea of your oven being a welder seems cool to me, especially if someone had a need to weld often and their kitchen was through to their garage.

Question by killerjackalope    |  last reply


could someone post an instructable on how to make a quad MOT stack?

I looked all over the internet and instructables on how to make a quad Microwave oven transformer stack but all i could find is a schematic  and that is not enough.  there are plenty of instructables on how to make a dual stack but none on a quad also could you show me how to add resonant capacitors

Question by crazy-blender    |  last reply


Snail Car, Batman Batarang, Erupting Volcano Cake

Snail Car Batman Batarang Erupting Volcano Cake Build a Desk Mac and Cheese Balls Temporary Pizza Oven Steampunk Goggles Book Lamp Frappuccino on a Stick Parachute Dome Tent Tennis Ball Back Massager High Voltage Power Supply DIY Microwave Popcorn Chaos Machine Magnetic Knife Block

Topic by randofo