EEVblog Electronics Community Forum

EEVblog => EEVblog Specific => Topic started by: martinr on October 25, 2015, 07:27:58 am

Title: Teardown of an X-Ray machine, quite old video ?
Post by: martinr on October 25, 2015, 07:27:58 am
I was browsing Dave's YouTube channel for a teardown video I remember he made, it was some kind of x-ray machine I think and he at some point was pouring out this gross looking oil from parts of it. Can't find it, I remember it was quite fun, it was a long time ago so maybe it was removed.
Anyway, greetings to all and thanks for any clue.
martinR
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: PA0PBZ on October 25, 2015, 07:38:01 am
I can't remember Dave ever doing that, but the one that comes to mind is this:

https://www.youtube.com/watch?v=RsU74R_vdnM (https://www.youtube.com/watch?v=RsU74R_vdnM)
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: hamdi.tn on October 25, 2015, 07:52:31 am
you mean mike video ' mikeelectricstuff'

https://www.youtube.com/watch?v=4bbbRDyKh4g (https://www.youtube.com/watch?v=4bbbRDyKh4g)
https://www.youtube.com/watch?v=aCc83fh1Mt8 (https://www.youtube.com/watch?v=aCc83fh1Mt8)
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: PA0PBZ on October 25, 2015, 07:54:00 am
you mean mike video ' mikeelectricstuff'

Maybe, but I went for the oil pouring...
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: Andy Watson on October 25, 2015, 08:03:19 am
I remember a video where somebody tore-down a big, oil-filled x-ray transformer - required lifting equipment to take it a part. I think it was one of the "maker" community that made the video. Chris Boden maybe?

Edit: This is the one I was thinking of:
https://youtu.be/gZtSE6OJGBc
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: martinr on October 26, 2015, 12:56:50 pm
Thanks a bunch guys, those were some really interesting videos in themselves, definitely worth a view. But not what I remember. The video I remember was Dave for sure, I guess he was in his old garage lab as I doubt he'd want to go pouring out oil in his nice new clean lab with smart carpeting.
I'll keep ploughing through the older videos and see if it is hidden somewhere. If it wasn't Dave then it really is a case of my memory playing tricks!

Thanks again for the replies, nothing like a mystery from far back in one's memory  ;)
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: promacjoe on October 26, 2015, 01:27:07 pm
 Note: if you ever find an x-ray machine and want to tear it down, do your homework first. Some of the old x-ray machines contain a radioactive powder. One such machine contaminated several blocks, and affected hundreds. I don't remember where it happened, but I believe it was India. it was a documentary on the PBS channel.

Be Careful.
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: helius on October 26, 2015, 01:33:37 pm
X-ray machines do not become radioactive. The X-rays are produced by scattering when high-velocity electrons in a vacuum tube hit a target. The greatest danger when handling these machines is if the safety interlocks are defeated, or the beryllium window in the tube is broken releasing beryllium dust.
You are thinking of incidents when radiotherapy machines (which are made for treating cancers, not for imaging) were broken into, releasing their radioisotopes.
https://en.wikipedia.org/wiki/Goiania_accident
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: amyk on October 26, 2015, 02:08:16 pm
Mike's x-ray machine teardown does contain oil-pouring.
https://www.youtube.com/watch?v=Q4ffx5eX39E (https://www.youtube.com/watch?v=Q4ffx5eX39E)
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: SteveyG on October 27, 2015, 06:50:35 pm
Pretty sure Dave has never done an X-ray video.
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: rickselectricalprojects on October 27, 2015, 07:09:52 pm
i would love to get my hands on an xray transformer >:D but its probably best that i don't get one.
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: crispy_tofu on October 27, 2015, 07:13:40 pm
Pretty sure Dave has never done an X-ray video.

Yep - to my knowledge, he hasn't. Would like to see one on the blog though!  :popcorn:

i would love to get my hands on an xray transformer >:D but its probably best that i don't get one.

Don't lick it!  :-DD
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: Nermash on October 27, 2015, 07:28:16 pm
Thanks a bunch guys, those were some really interesting videos in themselves, definitely worth a view. But not what I remember. The video I remember was Dave for sure, I guess he was in his old garage lab as I doubt he'd want to go pouring out oil in his nice new clean lab with smart carpeting.
I'll keep ploughing through the older videos and see if it is hidden somewhere. If it wasn't Dave then it really is a case of my memory playing tricks!

Thanks again for the replies, nothing like a mystery from far back in one's memory  ;)

You might be thinking about Photonicinduction's video on repair of one of his HV transformers?
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: dr_dan on October 28, 2015, 01:16:27 am
Note: if you ever find an x-ray machine and want to tear it down, do your homework first. Some of the old x-ray machines contain a radioactive powder. One such machine contaminated several blocks, and affected hundreds. I don't remember where it happened, but I believe it was India. it was a documentary on the PBS channel.

Be Careful.

Are you thinking of this (actually a radiotherapy source):

https://en.wikipedia.org/wiki/Goi%C3%A2nia_accident
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: rickselectricalprojects on November 05, 2015, 09:59:15 pm
Pretty sure Dave has never done an X-ray video.

Yep - to my knowledge, he hasn't. Would like to see one on the blog though!  :popcorn:

i would love to get my hands on an xray transformer >:D but its probably best that i don't get one.


Don't lick it!  :-DD
if you licked that: https://www.youtube.com/watch?v=ZswlBtiFth8 (https://www.youtube.com/watch?v=ZswlBtiFth8)
there might be a slight chance you would die :-DD
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: Psi on November 05, 2015, 10:12:12 pm
Another thing to worry about is if the oil contains PCBs  (not circuit boards).
It's really nasty stuff.
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: rickselectricalprojects on November 06, 2015, 03:00:08 pm
Another thing to worry about is if the oil contains PCBs  (not circuit boards).
It's really nasty stuff.
what exactly are PCBs?
i see capacitors from microwaves and start caps that say "no PCBs"
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: SNGLinks on November 06, 2015, 03:07:12 pm
Another thing to worry about is if the oil contains PCBs  (not circuit boards).
It's really nasty stuff.
what exactly are PCBs?
i see capacitors from microwaves and start caps that say "no PCBs"
https://en.m.wikipedia.org/wiki/Polychlorinated_biphenyl
Title: Re: Teardown of an X-Ray machine, quite old video ?
Post by: helius on November 06, 2015, 03:25:22 pm
They were used in transformer oil for their dielectric and nonflammable properties. Preventing corona breakdown and arc fires in HV transformers is a very good thing. Pity about the health effects.