About this site

toroidaltransformer.co.in was the original website of Vaani, a maker of toroidal transformers in India. Our shop, price list and custom-order service have since moved to toroidaltransformer.in.

This domain is now our information site: a free, plain-English reference on how toroidal transformers work and how to choose, size, install and troubleshoot them. It draws on a decade of winding transformers for amplifier builders, audio companies and industrial customers.

The guides are general information. Mains voltage is dangerous: if you are not confident working with it, have your equipment built or checked by a qualified person.

Looking for something else?

• Standard transformers and prices: toroidaltransformer.in/products
• Custom designs and quotes: toroidaltransformer.in/custom-request