Disclaimer, you really should not do this. Don’t try this unless you are really sure you know what your doing. Mains is dangerous by itself; Using microwave transformers like this is much higher risk.
Picked up a broken microwave from freecycleOk, Sticker.Getting the top off. There is a pretty bad smell coming from this microwaveFor something that is not meant to be user-serviceable all these components came out really easily. Here is what I was afterA little disappointed its a small plastic transformer. I was expecting something bulkier and with a stronger metal case. But I will try it anywayRemoved it from the boardRemoved the copper with some clippers and a screwdriver. the plastic is very brittle and breaks off easily, need to be carefulAll the second coil removed
Picked up some heavy duty cable from scrap at workGave the secondary coil a winding to have a quick test
Wired up a cable to a chocolate blockIt didn’t really workAnother microwaveand out of it a new transformer, much more like what I was looking for. I also bought a circuit breaker so I don’t necessarily blow the mains if this one is faulty too
I found the exact same microwave and disassembled it. Things didn’t end well for the transformer, it doesn’t like the mains 😛