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Remember not to touch the MOT primairy or secondary circuit when power is on, just unplug it when working on it YOU'LL LIVE A LOT LONGER
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Click here to view another MOT photo 1 MOT gives about 1900 - 2300 Volts at about 300 to 500 mA, depending on the microwave it came out of. Usually, that is not enough for a coil to run on, so the most logical thing to do then is to put more of them in series; I used 2 in series. An other possibility is to put the secondary in parallel, just to get more power, you would say that the Wattage stays the same, in parallel or series (P=U*I) But a major advantage in coiling is a high voltage to begin with So, to put them in series, you must put the primary in parallel, or anti parallel, depending on how you connect the secondary and hook up the secondary in series, connected to a spark gap with a gap of about 1 or 2 mm (0.08") to be sure of a spark. (keep in mind that MOT's create a massive amount of power and that will cause the gap to overheat if they are too small) Some coilers preffer to use a variac to see if the MOT is connected correct, by useing a very small voltage to feed them, and then messureing the output with a meter, but I just connected them and light it up.
When connection is good => spark When connection is wrong => no spark If you don't get a spark, just reverse your connections of the secondary. |
As you can see on the pic above,
there are two red wires comming out of the middle of the transformer,
which a lot of people don't know what to do with.
Well it is used for a microwave internal stuff, so you don't need it, you can either cut it of or just let it be, it gives 3Volts at 10Amp.
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