Microwave Oven Transformers Using Them For Projects

[hoangky]

Thank you Mr. Murray-Smith. I enjoy the content, it is very educational. And your style of presentation is very engaging.

[Kapalek]

I boiled one of the transformers in a pan and made a youtube video with that process (I wanted the core to expand a bit and the resin that holds the coils to soften).
MOT s (Micro Oven Transformers) make this world a better place :D Very nicely done transformer conversion! Thank you for sharing!

[kranzonguam]

Thank you, sir, for demystifying the spot welder and many other things!
Stay safe!

[RWBHere]

I worked in a transformer, choke and inductor making factory for a while. We made devices so that they didn't vibrate and make noise, to improve insulation performance, and to improve efficiency. Some of the final construction steps were to immerse the devices in a bath of varnish, in a vacuum chamber. This sucked the varnish between the core laminations, the bobbins, and all of the coil windings, when the vacuum was released. Then they were drained and baked in an oven to harden the varnish. A similar process is used worldwide, using other varnish or wax.

The downside is that transformers treated in those ways are very difficult to dismantle nondestructively. We often had older transformers, made by many different manufacturers, sent in for reverse-engineering and rebuild. That could be done least destructively by immersing a device in solvent for a couple of days, and then its core could be dismantled. The first 'E' or 'T' (for either 'E-I' or 'C-T' laminations) of the transformer or choke core would be drifted out with a thin drift, and then the dismantling became progressively easier. Bobbins could then be unwound, measured and turns counted, before being cleaned and rebuilt.

In the light of this, your destructive method is perhaps the easiest one to adopt, if a winding can be sacrificed.

[SailorJohn]

2 thumbs up and 5 out of 5 stars for you! Great description and very nice demonstration.
You have answered the question I've always had regarding turns in the top coil and effect of putting more turns.. Thank you

[victoryfirst]

Great job Professor Murray-Smith. Just the right amount of information to present to us, the YouTube clients.

[craigschiller]

One of the best explanations of a transformer aswell as a demo. Brilliant. !!!!

[coltronex]

Takes me back to the science lab at school many moons ago, you have the same passion as my science teacher, the passion is infectious!!!

[eddylesjacinthe]

Thank you, soo much.
You are an amazing engineer.
I was watching you from USA.
Good job. I got a bunch of those microwave transformers. I always believe there is something that can be done using them.

[messenger]

They should force all kids across the world. To learn from this man. He is doing amazing things here. I learned more in a hour watching his videos. Than all of school.

[Jimunu]

Your explanation of the transformer might be the best explanation of transformers I have experienced.

[kj]

The things you can do with a micro transformer is amazing. Great vid as always. Such a wonderful man. I wish I had a friend like him.

[tariq]

I watched quite a few of these videos but for some reason i like the way he demonstrated and explained everything a lot.

[quirkyMakes]

thanks for the video. I've watched dozens of videos on this particular subject and yours is the best that I've come across so far. Thank you very much.

[ronparker]

Don't get no better than this! Well done sir. And thank you. Am building a spot welder as we speak.

[chriswcoker]

Great informative video. Thank you, Sir. I really enjoyed getting to see the outcome of different configurations (different number of turns).

[notfunnynews]

This is the most practical channel to have in your subscriptions. My brother from across the pond believes in the KISS theory " keep it simple stupid" but doesn't speak condescendingly. Allways a pleasure to get the missing or improved bits from him. He makes every day projects easier. He's worth more than you can give. Thank you Robert Murry Smith.

[gideonrl]

Brilliantly lucid Rob. Once again!
Looking forward to something on Fly back transformers.

[manolisgledsodakis]

My friend and I have been staring at a transformer for two months, trying to pluck up courage to saw into the weld. And now you come up with the [obvious when you see it] solution. Many thanks!

[christopherniedersteiner]

I love the combination of hose clamp, boost cables and vise grips!