10 FT50-43 Ferrite Toroid Core

Does the job!

worked for project just fine

Arrived heavily wrapped, and delivered in large bubble packet. All good and nothing damaged, looked genuine. Usual biz, AM transmitters and LW reception or baulns.

It came with 9 1/2 instead of 10, no clue where the other 1/2 went. But I only needed 3 and they worked perfectly

I used them to build my own inductors. I needed 100uH and 300uH inductors, I assumed Al = 520; that gave me 15 turns and 24 turns respectively. Later I measured the inductors with a good LCR, the measured values were 112uH and 290uH; Q=40 at 100kHz. These are size 50, they are small so check before buying.

I used one of these small toroidal cores recently to wind a 49:1 UNUN broadband RF transformer for an amateur radio receive only antenna. It functioned perfectly from about 2 MHz to 30 MHz (where I stopped the NanoVNA test). If you need good performance below 2 MHz, a different core material should be selected. Good buy.

Arrived completely broken. Useless.

So there isn’t much to say. It’s just what you would expect if you order an FT50-43 toroid. If you have never seen one in person they may be smaller than you expect but not something that is impossible to work with. I’ve wound a couple and they do the thing. I’m using them for a very compact EFHW antenna. Let’s be honest, it’s a metal core ring, not much that can go wrong