What toroids are recommended to buy? - Page 1
Forum section: electronics / beginners

author: Zandor
author_rank: Contributor
timestamp: January 31, 2015, 03:49:30 am
content: Hi,I am looking to pick up some toroids to experiment with. I am thinking of playing around with winding some inductors, maybe some transformers and then use a few for some RF receiver work. Thinking AM/FM for now but I may expand on that.It would be nice to have a general stash of them for the above for other projects I may do. I was wondering what types and sizes do you recommend I get?Thanks.

author: IconicPCB
author_rank: Super Contributor
timestamp: January 31, 2015, 07:44:36 am
content: I usually purchase what I need when I need it.Like to keep my powder dry.

author: VK5RC
author_rank: Unknown
timestamp: January 31, 2015, 08:22:32 am
content: There are a bewildering (to me anyway!) variety of sizes, shapes and differing materials to chose from, the selection will depend on your purpose and frequency. There are some general discussion papers around (they bewildered me even more, OK I am exaggerating a little) but most circuits will indicate size and core material.I would start with a project you are interested in and work from there.http://www.fair-rite.com/newfair/index.htm

author: Psi
author_rank: Super Contributor
timestamp: January 31, 2015, 08:54:20 am
content: Yep, you need a rough idea of the frequencies first, then you can get a selection of toroids to fit.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 31, 2015, 09:11:07 pm
content: Amidon is the usual go-to for that sort of thing. Yeah, frequency range matters.Ferrites are also available from Mouser, Digikey and other more mainstream suppliers. These are good for transformers but not inductors.Gapped ferrites (in "shapes", like E cores and etc.) are good for inductors and coupled inductors (the distinction between "coupled inductors" and "transformers" is that transformers are intended to *not* store energy, while inductors *are*), which you can find on Digikey/Mouser. You might not find perfectly gapped parts, but you can shim them).Most ferrites are intended for lower frequency operation, power switching circuits and that sort of thing. Not so good for high frequency use.EMI parts (usually ferrite beads, toroids) are intended to be lossy, but they're often good enough to use as transformers (but never inductors) in suitable ranges of radio frequencies.Tim

author: mhzghz
author_rank: Contributor
timestamp: February 01, 2015, 06:18:06 am
content: Here's a nice starter kit:http://www.kitsandparts.com/WA2EBY_toroidkit.phpType 43 material for wideband ferrite transformers and type 2, and type 6 powered iron for hi-Q inductors.

author: Richard Crowley
author_rank: Super Contributor
timestamp: February 01, 2015, 06:39:54 am
content: At any given moment, there are typically several kits of various electronic components for sale on Ebay. Including kits of ferrite torroid cores.

author: Zandor
author_rank: Contributor
timestamp: February 02, 2015, 10:17:51 pm
content: Thank you for the replies, I really appreciate it.Looks like I'll do a bit of thinking about what I want to try to do and then get the toroid parts fromwww.kitsandparts.com.