Thank you Fermin for your help but I don't have microwaves because I don't repair them, but if you have any idea how much the magnetron can leave, I will tell him if he wants to repair it. Thank you.
Everything depends on whether you are a country, well if you are from Mexico an approximate, the magnetron goes between 350 Mexican pesos to 350 or so, of course more labor, I have put almost used of the microwaves that are thrown in the scrap yards , you will see that they sell them to me at 10 or 15 pesos and very good still hehe you have to contribute to the environment, using pieces in good condition, greetings and luck.