Are the north and south poles, axially (top and bottom) or diametrically (side to side)?

Your question indicates that you assume this product is a magnet. This product is not a magnet. It is a ferrite core used to construct impedance matching transformers by winding wires repeatedly through the center and tightly wrapped around the edges of core.

works for dash cam radio interference???

You can use the clip on type for that as well. Get good ones, not unknown cheap chinese.

Would this help with noise on AM radio? Wrap the antenna wire around and through this?

If the antenna wire is just that a wire then you will only decrease the signal and the noise. Find the source of the noise. LED lights, wall plug-in power sources, or other electrical appliances. If you find the source then maybe using snap on ferrite cores. They see these on Amazon also. I found a source for my AM noise was a power supply for a blue tooth adapter I had. After unplugging this the noise went away. If you shield the antenna as using coax and running an outside antenna wire to get away from the noise that might work also, but that depending where you live might not be possible.

what is the dimater of the inner hole?

I don't have an ID micrometer handy but an eyeball guess with a desk ruler is about 1 3/8 inch. If you need something more precise or in metric, I can figure that tomorrow.

Ft 240 43 Ferrite Toroid Core Mix 43 For Rfi

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3374 kr

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Description

🔧 Elevate your RF game with the FT-240-43 — where power meets precision!

POWERHOUSE PERFORMANCE - Handles up to 1 kW, making it the go-to core for high-power HF baluns and impedance transformers.
BROADBAND RFI SUPPRESSION - Expertly engineered Mix 43 material targets interference from 20 MHz to 250 MHz, ensuring crystal-clear signal integrity.
MULTI APPLICATION MASTERY - Perfect for 1:1, 4:1, 9:1 baluns, common-mode chokes, End Fed and OCF antennas, plus appliance noise suppression.
PRECISION SIZED FOR VERSATILITY - Generous 2.4" outer diameter fits RG-8, RG-213, and speaker wires with ease, empowering complex coil designs.
THERMALLY STABLE UNDER PRESSURE - Maintains consistent performance even in demanding thermal environments—no signal dropouts, no compromises.

The FT-240-43 Ferrite Toroid Core, crafted from high-permeability Mix 43 material, is designed for effective RFI suppression and HF balun construction. With a 2.4" outer diameter, it supports multiple wire turns and handles up to 1 kW power, covering a frequency range of 20 MHz to 250 MHz. Its thermal stability and versatile application options make it a trusted choice for RF engineers and hobbyists aiming for superior signal clarity and interference reduction.

Specifications

ASIN	B07Y6NQRGF
Best Sellers Rank	#46,776 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Electronic Ferrites
Date First Available	September 21, 2019
Item Weight	4.2 ounces
Manufacturer	FRP
Package Dimensions	4.02 x 3.19 x 1.61 inches

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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3374 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Iceland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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FT-240-43 Ferrite Toroid Core – Mix 43 for RFI Suppression & HF Baluns (2.4" OD, High Permeability) (PACK OF 1)

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Specifications

Common Questions