Amidon FT240-43 FT-240-43 Ferrite Toroid Core 43 Material

Amidon FT240-43 FT-240-43 Ferrite Toroid Core 43 Material

Q: 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.

Q: works for dash cam radio interference???

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

Q: 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.

Q: 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.

Product ID: 444008308

Secure Transaction

⚡Supports up to 1 kW power

📡20-250 MHz RFI suppression

🔄2.4" OD for multiple wire turns

Frequently Bought Together

FT-240-43 FT240-43 Ferrite Toroid Core 43 Material

BNTECHGO 16 AWG Magnet Wire - Enameled Copper Wire - Enameled Magnet Winding Wire - 4 oz - 0.0492" Diameter 1 Spool Coil Red Temperature Rating 155℃ Widely Used for Transformers Inductors

FT-140-43 Ferrite Toroid Core | 43 Material

Description

⚙️ Power your RF projects with precision and zero interference!

GENEROUS CORE SIZE - Spacious 2.4" outer diameter fits multiple RG-8 or RG-213 turns for versatile builds.
HIGH POWER ENDURANCE - Handles up to 1 kW, perfect for demanding HF baluns and impedance transformers.
BROADBAND RFI SHIELDING - Expertly blocks interference from 20 to 250 MHz, keeping your signals crystal clear.
PREMIUM MIX 43 MATERIAL - High initial permeability (µi ≈ 850) ensures strong attenuation with minimal loss.
THERMALLY STABLE PERFORMANCE - Maintains consistent operation even under intense thermal conditions.

The Amidon FT240-43 Ferrite Toroid Core is a robust, high-performance component designed for effective RFI suppression and impedance transformation in the 20-250 MHz range. Featuring a large 2.4" outer diameter and premium Mix 43 ferrite material, it supports high power up to 1 kW and offers excellent thermal stability, making it ideal for HF radio, EMI filtering, and advanced antenna applications.

Specifications

Brand	Amidon
Manufacturer	Amidon
Package Dimensions	10.21 x 6.6 x 1.7 cm; 118 g
Item part number	FT-240-43
Batteries Included	No
Batteries Required	No
Manufacturer	Amidon
Country of Origin	USA
Item Weight	118 g

Have a Question? See What Others Asked

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

works for dash cam radio interference???

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

what is the dimater of the inner hole?

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products