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4hv.org :: Forums :: Tesla Coils
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ATX psu turns off when powering zvs flyback for sgtc

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KUN
Mon Mar 12 2018, 07:31PM
KUN Registered Member #61824 Joined: Mon Oct 02 2017, 05:38PM
Location:
Posts: 40
aah ok but where can i find such transformer, i started experimenting a little, and i found some iron core that is about 5.5 cm long 3 cm in width, and about 4.5 cm heigh. Is that enough to make 30 v, 10 a transformer. How do i calculate core dimensions for transformer of required power ratings. I have some wires from old transformer, about 250 m(0.2 mm), is that enough for my secoundary that would be plugged into the mains or will it overheat? How do i calculate required wire lenght(resistance) for secundary? Tnx for help, and sorry for bad English.
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KUN
Mon Mar 12 2018, 07:35PM
KUN Registered Member #61824 Joined: Mon Oct 02 2017, 05:38PM
Location:
Posts: 40
Here is a little video of my coil working under 170 wat input from 2 laptop supplies, the turning on and off is becouse of the problem i described.
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KUN
Mon Mar 12 2018, 09:03PM
KUN Registered Member #61824 Joined: Mon Oct 02 2017, 05:38PM
Location:
Posts: 40
here it is
]tctrim_avi.avi[/file]
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AndreiRS
Mon Mar 12 2018, 11:00PM
AndreiRS Registered Member #62109 Joined: Sun Jan 28 2018, 10:00PM
Location: Porto Alegre
Posts: 56
You can't use ferrite core for mains power transformer. Only steel plates core.
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hen918
Tue Mar 13 2018, 12:45AM
hen918 Registered Member #11591 Joined: Wed Mar 20 2013, 08:20PM
Location: UK
Posts: 556
AndreiRS wrote ...

You can't use ferrite core for mains power transformer. Only steel plates core.
or powdered iron
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KUN
Tue Mar 13 2018, 09:10AM
KUN Registered Member #61824 Joined: Mon Oct 02 2017, 05:38PM
Location:
Posts: 40
I know i am using many peaces of an old transformer that i weld together
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teravolt
Tue Mar 13 2018, 01:26PM
teravolt Registered Member #195 Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
Hi Kun, where do you live, do you have any industrial salvage yards . if you have access to ebay this is what I am thinking

Link2

even a peace of used equipment or a surplus center may have a controls transformer of some type
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AndreiRS
Tue Mar 13 2018, 10:22PM
AndreiRS Registered Member #62109 Joined: Sun Jan 28 2018, 10:00PM
Location: Porto Alegre
Posts: 56
hen918 wrote ...

or powdered iron

Ops. cheesey Thanks!
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KUN
Wed Mar 14 2018, 09:39AM
KUN Registered Member #61824 Joined: Mon Oct 02 2017, 05:38PM
Location:
Posts: 40
I am from Croatia, i have access to ebay, but what is the output of that transformer it only says 150 VA?
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