Author Topic: Nice little flybacks for the price  (Read 1431 times)

Offline IonWind

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Nice little flybacks for the price
« on: September 21, 2023, 11:12:29 AM »
Got 4 of these (2 x 20kv and 2 x 30kv) : https://www.aliexpress.com/item/1005004192104392.html?spm=a2g0o.order_list.order_list_main.5.21ef1802k8nXlo

Nice and easy, no pin-testing or winding your own primary and comes with driver board.

Will test this morning.
Gary.

I know a little about a lot and a lot about a little.

Offline IonWind

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Re: Nice little flybacks for the price
« Reply #1 on: September 21, 2023, 04:49:15 PM »
Both perform to spec.

The 20kv ones have input pins marked plus and minus, as do the 30kv ones but the 30kv ones came with input leads already attached.

I drove them at a max of 20V and 3A from a DC bench supply, then my additional leads started to overheat.
Gary.

I know a little about a lot and a lot about a little.

Offline davekni

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Re: Nice little flybacks for the price
« Reply #2 on: September 22, 2023, 05:22:04 AM »
I'm guessing these output DC, so like typical CRT flyback transformers.  If they output AC, that would make them much more useful.
David Knierim

Offline IonWind

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Re: Nice little flybacks for the price
« Reply #3 on: September 29, 2023, 09:55:11 AM »
I assumed they were AC since no outer signs of rectification but haven't tested, will test today.
Gary.

I know a little about a lot and a lot about a little.

Offline FPS

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Re: Nice little flybacks for the price
« Reply #4 on: October 06, 2023, 12:10:14 PM »
They are DC, it shows it in the schematic on the store directly charging capacitor. Also shows voltage being measured on a DC meter.

This one is AC https://www.aliexpress.com/item/1005005095688126.html?spm=a2g0o.order_list.order_list_main.329.56ca1802nn0Tc5

But no doesn't have the nice form factor of the OP. It's very rare to find flybacks with nice fixtures.

Isn't there a way of burning out the in-built diodes?

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Re: Nice little flybacks for the price
« Reply #4 on: October 06, 2023, 12:10:14 PM »

 


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