50kV Supply

This forum is for specialized infomation important to the construction and safe operation of the high voltage electrical supplies and related circuitry needed for fusor operation.
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Mark Rowley
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Re: 50kV Supply

Post by Mark Rowley » Mon Nov 11, 2019 12:18 am

His question is also not pertinent to this thread and furthermore the answer he seeks is easily found in the FAQ's. Providing he complies with the registration rules, answering his question will serve to skew / hijack the linear flow of Joe's post.

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seamus sullivan
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Re: 50kV Supply seamus sullivan

Post by seamus sullivan » Wed Nov 20, 2019 4:42 pm

ok sorry
i have fixed that and put in my real name and my about me.

what should my power supply be rated at?
how many mA and kv should it be set at?

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Richard Hull
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Re: 50kV Supply

Post by Richard Hull » Wed Nov 20, 2019 5:08 pm

Fusion power supplies are not set at any voltage or current. Instead they must be totally variable from 0 volt to a maximum determined by the user. Demo fusors are easily run by oil burner ignition transformers controlled by a variac. They are typically rated at 10kv @ 20 to28 ma. A neon sign transformer is more often used in the 12kv to 15kv range and rated at 30ma. High voltage diodes are needed to turn this into DC.

All of this related to a demo fusor is in the FAQs which it is now obvious you have not read at all. Demo fusors do not do fusion....

Serious, real fusion fusors demand a minimum of 30kv @ 30ma capability or more. This separates the men from the boys. Top level fusors use supplies that are capable of running well over 40kv @ 30ma.
Again, all of this is in the FAQs....Read them....

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

seamus sullivan
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Re: 50kV Supply

Post by seamus sullivan » Thu Nov 21, 2019 4:39 pm

ok thanks for your help. i will read the FAQs. I just recently registered and don't know a lot about the site.

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Nicolas Krause
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Re: 50kV Supply

Post by Nicolas Krause » Sun Sep 06, 2020 8:06 pm

I've finally gotten around the opening up my Glassman 50KV supply, and was reviewing this thread before beginning the conversion work for my fusor. Unfortunately a number of photo links in this thread appear to be dead, I was hoping Joe had some backed up and would be able to repost them!

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Bob Reite
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Re: 50kV Supply

Post by Bob Reite » Mon Sep 07, 2020 1:53 am

You don't need 30 mA. I have achieved measurable fusion at 40 KV at 7 mA.
The more reactive the materials, the more spectacular the failures.
The testing isn't over until the prototype is destroyed.

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Re: 50kV Supply

Post by Rex Allers » Mon Sep 07, 2020 11:01 am

Nicolas,

Per your, "opening up my Glassman 50KV supply." I'm not sure what that means. What exactly do you have?

The aluminum box that Joe tipped us off to is part of a rearranged custom design based on a
Glassman ER50N6 0-50kV 0-6mA supply. That aluminum box has the high frequency transformer and a multiplier section. To make the box work it needs a driver board. Joe made his own, the full design was never shared. In the TSA-style x-ray scanner that these came from there was a main board almost exactly as in a Glassman ER supply. The ebay seller was offering a very price-reasonable package with the aluminum box, the main board, and connecting cables.

Chris Giles is the only one I heard from that went for that deal. (Other than me.)

I think I have worked out all the details one might need for a standard ER supply or the variations that this scanner package used.

So if you say what you have, and it is some form of ER that I understand, I can probably point you at an info package with all the details to make it work. If you got one of the aluminum boxes but not the main board, then you are missing the whole driver system.

Oh, and with Joe's driver that he designed, I think he pushed the (aluminum box) transformer and multiplier a good bit beyond the 300 W output specs of the ER50N6.
Rex Allers

Cristiano_Machado
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Re: 50kV Supply

Post by Cristiano_Machado » Mon Sep 07, 2020 11:38 am

Hello,

At that time I bought one of this box. Indeed it didnt come with the driver.

If someone develop a driver for this supply, I am interested.

Regards,

Cristiano

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Nicolas Krause
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Re: 50kV Supply

Post by Nicolas Krause » Mon Sep 07, 2020 5:49 pm

Hi Rex,
I have the same box purchased by Joe, it's the AHV1IRT50N06, it requires the driver circuit. I'm planning on making my own, but I was hoping to see the arrangement in the box that Joe had built just to give me an idea of how he'd solved the problem. Unfortunately the photos have disappeared due to the site migration.

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Re: 50kV Supply

Post by Cristiano_Machado » Mon Sep 07, 2020 8:34 pm

I have this picture from original post:
IMG_0810_sm.jpg

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