Apple 1 power supply from 240V mains

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Joined: Apr 1 2025 - 17:46
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Apple 1 power supply from 240V mains

Hi guys i am wondering how to make the 2 transformers used in the Apple 1 from 240V mains as i dont live in the US. It says on the schematic T1 equivalent should be 10V center tapped with a 3A min current rating and T2 should be 28V center tapped with a 1A min current rating. I have been looking for replacements but im not sure if i should buy one online or if i could make my own. Has anyone done this conversion before or found a way to use a 240V transformer? Thanks

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Last seen: 8 hours 44 min ago
Joined: Apr 1 2020 - 16:46
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220V transformers for Apple-1 ...

... are listed in my "Tips & Tricks" pdf for Apple-1 builders who were using my famous IC kits (only two left ;-)

I've sent you a PM on how to get the Tips & Tricks.

 

- Uncle Bernie

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Last seen: 2 hours 49 min ago
Joined: May 4 2021 - 06:35
Posts: 180
Transformers

Hi Maxplayz,

there you go:

HAMMOND 186D10 for the 10V (10V - No Center Taping needed)

HAMMOND 186D28 for the 28V (14V + 14V - Center Tapping)

 

They're quite largely available from most retailers (i.e. Mouser).

 

Enjoy! :-)

 

Claudio - P-LAB

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