uxcell 22mm x 14mm x 8mm Power Transformer Ferrite Toroid Cores Green 10 Pcs

Not for use as electro-magnetic core. Pointless for my experiments with electro-magnets because the wires wouldn't stay in place. Works well for other functions.

Perfect. All 10 were intact no broken ones, packaged carefully in foam. LCR meter reads 227 uH with 7.5 turns

It would be nice if the seller published more data on the toroid. I have a DE5000 LCR and I measured an AL of 2.66x10-6 (so 1 turn gives 2.66 uH). I also computed a Ur of 6168 which would make it great for RF chokes if I knew the maximum magnetic field before saturation. Also, this doesn't coincide with other comments so it's possible that there is a wide variation in the material used.

The toroids were in good shape and appeared new. I calculated that the material is 10K for this batch. It would be nice if they would list it in the description.

Works great for my radio project.

Measured slightly higher than 5000nH/T^2 at 1kHz when wrapped with 10 to 20T and no bias current. Inductance dropped to about half it's L_0 value when biased with about 1.2 A*T. But my setup was fairly crude, so the real A*T for L_0 / 2 is probably a bit higher.

10 turns #30 WW wire produced a tad over 500 uHy. Good value at a buck each will buy more. good for RFI control and hot coax cable outer shield and actually some audio filter projects since it does not take a lot of wire to get in the mHy range. thank you Bob, KE6F

Seems ok.

elektrische Störungen behoben

Muy buena calidad

fast delicverey

Used mine to build a joule thief light to use up 'dead' AA batteries and they work well for this purpose

Je devais en faire une self pour protéger mes électroniques des champs électromagnétiques de hautes fréquences comme la Wi-Fi, le Bluetooth , la G5 etc... J' ai finalement opté pour un coffret de ferrites de différent diamètre se clipsant facilement sur tous les câbles . Philippe Tremblais