R-core transformer supplier

DickCappels

Joined Aug 21, 2008
7,704
Now it works for me too. Maybe some kind time-out problem here. Sorry for the diversion.

Do you know any coil winding companies in your area?
 

Thread Starter

Ian0

Joined Aug 7, 2020
3,237
Yes - there's plenty - three in one small town, but all just EI and UI bobbins; and I know several toroid manufacturers as well, but the only place I've seen R-cores are in India and China.
 

DickCappels

Joined Aug 21, 2008
7,704
Have you asked any of them?

In the San Francisco Bay Area there were several transformer companies (30 years ago) who would probably take on a new kind of core.

Micrometals in the Los Angeles are is where I would ask first.
https://www.micrometals.com/ The people who ran the companies in those old days were pretty easy-going creative types. You might give those whom you have not asked if they are interested. Business is tough these days.

Another idea is source the cores yourself and wind your own. How hard can it be?
 

Thread Starter

Ian0

Joined Aug 7, 2020
3,237
Actually, quite tricky. The core is solid. The bobbin comes in two parts, which are snapped together around the core. The bobbins have a geared edge, and are spun around the core by a gear on the winding machine. Not quite as involved as a toroid-winder, but a specialist machine.
 
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