Christmas Comes Early!

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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Garrett Young
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Christmas Comes Early!

Post by Garrett Young » Thu Jun 08, 2017 6:40 pm

(Note: I have no affiliation with the seller and can't guarantee the functionality of the listed item but I purchased one and will update the thread with my findings)

Spellman PTV50N200 (related thread: viewtopic.php?f=11&t=4852)

-50kV 4mA 200W (can be boosted to 7 mA/350W using the schematics in the linked thread)

http://www.ebay.com/itm/Spellman-50kv-H ... 2706614602

$125! (now $150)
- Garrett

ian_krase
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Re: Christmas Comes Early!

Post by ian_krase » Thu Jun 08, 2017 7:59 pm

Oh wow.

Is that enough current though?

(Who cares, I'm not doing fusion for the *fusion*)

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Garrett Young
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Re: Christmas Comes Early!

Post by Garrett Young » Thu Jun 08, 2017 8:06 pm

In my device, 50kV and 7mA would produce very easily detectable fusion.
- Garrett

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Garrett Young
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Re: Christmas Comes Early!

Post by Garrett Young » Thu Jun 08, 2017 10:13 pm

Here are the changes that I identified to convert to the 350W version:

C15 0.047/50V

C39 0.022/50V
R50 4.7k 5%

JB5 IN (Used for Fan 24VDC)

R26 20k, 22T (?, table slightly unclear)
- Garrett

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Dennis P Brown
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Re: Christmas Comes Early!

Post by Dennis P Brown » Thu Jun 08, 2017 10:24 pm

But your chamber operates at 33 milli-torr which is rather high compared to standard fusors (5 milli-torr); having a small 4-way "T" as a chamber is an apparent advantage and might be the best approach. So using 50 kV and 7 ma on a normal sized chamber might not work. I like your approach better but if someone wants to use a 350 watt PS might it might be best for them to follow your complete design.

ian_krase
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Re: Christmas Comes Early!

Post by ian_krase » Fri Jun 09, 2017 3:21 am

Interesting.

I wonder if I can make an accelerator.

Sarvesh Sadana
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Re: Christmas Comes Early!

Post by Sarvesh Sadana » Fri Jun 09, 2017 6:35 am

Would it not be possible to purchase two power supplies and run them in parallel, giving you 50 kv at 14 ma?

John Futter
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Re: Christmas Comes Early!

Post by John Futter » Fri Jun 09, 2017 9:46 am

Sarvesh
This usually ends up with two lots of smoking ppwer supply remains

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Richard Hull
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Re: Christmas Comes Early!

Post by Richard Hull » Fri Jun 09, 2017 4:40 pm

John is right, paralleling power sources to get more current tends to work better with batteries and even they need load leveling sharing resistors that waste power.

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.

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Re: Christmas Comes Early!

Post by John Futter » Fri Jun 09, 2017 7:13 pm

Actually i'm not quite right with the paralleling of supplies
some supplies have the capability to slave to a master supply so that there is only one control loop operating.
If you have access to the internal control loops and know what you are doing it is possible but I would say this is out of reach to most people here

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