Toroid Core FT240-43 Ferrite

Q: What is the max wattage these are rated for. i want to build an unun for an end fed antenna that will handle 600 watts. will 1 or more handle amount?

You should use 2 for 600 watts, the highest rating I have seen for only one is 400 watts. Based on commercial models of end-fed ununs.

Q: I would like to use this on the 11-meters cb band (26.965 - 27.405) will this help to cut down rf returning to the radio?

how many watts? 4 watts isn’t anything to worry about but 500+ watts certainly would be. and yes, wound as a 1:1 choke (or they also call them current baluns) it will absolutely lessen common mode current coming back down the coax. coax coils (mentioned in other responses) are not nearly as effective as a 240-31 ferrite core wrapped as a 1:1 current choke. google “1:1 current balun” or “1:1 current choke” and you will see many examples to guide you. balun btw simply means balanced and unbalanced and they are used to rectify the impedance mis-match between the antenna and the 50 ohm coaxial cable. that generally involves lowering the high impedance of an antenna (200-3000 ohms depending on design) and even then, it should be referred to as a step down transformer but balun (balanced / unbalanced) has become the default term.

Q: Will this work to reduce/remove static noise on a regular FM radio produced from cheap led lighting in a garage?

It likely would with a couple of ifs. It is really large for such a task. The toroidal core would need to be placed as close to the LED power source as possible. Is the FM radio itself close to the LED lighting?

Q: Will this block interference from a treadmill motor? Ethernet over powerline is degraded whenever the treadmill is on.

ethernet over power line is destroying the shortwave radio frequencies , you should run a real cat-5/6 cable or use 5gig wireless.... and you would only need type 73 core for anything the treadmill is hashing out on the airwaves.

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Product ID: 444766783

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🔴High-permeability FT240-43 core

⚖️Lightweight 118g design

🇺🇸Made in USA for premium quality

Frequently Bought Together

Toroid Core FT240-43 Ferrite

Toroid Core FT240-31 Ferrite

FT-140-43 Ferrite Toroid Core | 43 Material

Description

🔴 Power your projects with precision and pride!

LOW NOISE OPERATION - Operates quietly at 30 dB, maintaining your workspace serenity
COMPACT LIGHTWEIGHT - Perfect 7.62 x 2.54 x 7.62 cm size fits seamlessly into your advanced electronics
VIBRANT RED 500 FINISH - Distinctive color coding for easy identification and professional aesthetics
TRUSTED AMERICAN CRAFTSMANSHIP - Manufactured by FAIR-RITE in the USA, ensuring top-tier reliability
PRECISION ENGINEERED FERRITE CORE - Optimized for superior EMI suppression and signal integrity

The Toroid Core FT240-43 Ferrite by KITMOUS, crafted by FAIR-RITE in the USA, is a high-permeability, compact ferrite core designed to enhance EMI suppression in electronic circuits. Weighing just 118 grams and featuring a distinctive red-500 finish, it combines lightweight convenience with professional-grade performance and quiet operation.

Specifications

Brand	KITMOUS
Manufacturer	FAIR-RITE
Country of Origin	USA
Colour	red-500
Number of Memory Sticks	1
Item Weight	118 g
Product Dimensions	7.62 x 2.54 x 7.62 cm; 118 g
Item part number	FT240-43
Item Height	3 Inches
Item Width	1 Inches
Noise Level	30 dB
Are batteries included?	No

Have a Question? See What Others Asked

What is the max wattage these are rated for. i want to build an unun for an end fed antenna that will handle 600 watts. will 1 or more handle amount?

I would like to use this on the 11-meters cb band (26.965 - 27.405) will this help to cut down rf returning to the radio?

Will this work to reduce/remove static noise on a regular FM radio produced from cheap led lighting in a garage?

Will this block interference from a treadmill motor? Ethernet over powerline is degraded whenever the treadmill is on.

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