FT-140-43 Ferrite Toroid Core - Amidon | 43 Material

FT-140-43 Ferrite Toroid Core - Amidon | 43 Material

Q: How much power will a balun made from an FT140-43 handle?

The maximum power has to do with the permeability of the material and the field strength your coil generates. If you exceed the maximum power, you won't damage the unit, but will incur losses as the ferrite material is saturated and cannot support an increased magnetic field. I'm using a single FT140-43 for a 49:1 UNUN (16 gage wire) running at 10 watts max for portable field operations, and it works very well for this application. According to my calculations, it could handle up to 37.5 watts CW or 60 watts SSB. If you need more power, I would recommend stacking two FT140-43s, and you could double the power, i.e. 120 watts SSB / 75 watts CW. If you're looking for even higher power, I would look at using an FT240-43 or FT240-52 core.

Q: What is the country of origin?

Faur-Rite Brand (the manufacturer) FT140-43 are manufactured in China.

Q: Where do you put these , on the wire or somewhere else ? I see some say wrapping the wire , do you run it in and out of the ring ?

Yes you run it in and out of the ring as many times as it can.

Q: Can this be used for long wire unun balun? some sites suggest t-130 hence the question.

Yes. I wrapped mine with #12 antenna wire as a choke between my elevated radials and earth ground. Major improvement to my signal strength. K5AE

Product ID: 695769822

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⚡High permeability: AL=885 ±20%

📏Precision dimensions: OD 35.55mm ±0.75mm

📡Wideband frequency range: 5-500 MHz

Frequently Bought Together

FT-140-43 Ferrite Toroid Core - Amidon | 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-240-43 FT240-43 Ferrite Toroid Core 43 Material

Description

⚙️ Elevate your circuit game with precision ferrite power!

BULK PACKAGING FOR PROS - Ideal for engineers and designers who demand volume and value without retail markup
TRUSTED FAIR RITE QUALITY - Industry-standard reliability that powers your high-performance electronics projects
WIDEBAND FREQUENCY VERSATILITY - Optimized for applications from 5 MHz up to 500 MHz, covering RFI suppression to power transformers
PRECISION ENGINEERED DIMENSIONS - Ensures consistent fit and performance in your custom transformers
PREMIUM TYPE 43 FERRITE MATERIAL - Delivers superior magnetic properties for efficient energy transfer and noise reduction

The FT-140-43 Ferrite Toroid Core by Fair-Rite is a precision-manufactured Type 43 ferrite core designed for wideband transformer and RFI suppression applications. With exacting dimensions (OD 35.55mm, ID 23.0mm, Height 12.7mm) and a high permeability rating (AL=885 ±20%), it supports frequencies from 5 MHz to 500 MHz, making it a versatile component for professional-grade electronic designs.

Specifications

Manufacturer	FAIR-RITE
Part number	FT140-43
Item Weight	59 g
Product Dimensions	5.08 x 2.54 x 5.08 cm; 58.97 g
Item model number	FT140-43
Material	Type 43 Ferrite
Measurement System	English
Batteries Included?	No
Batteries Required?	No

Have a Question? See What Others Asked

How much power will a balun made from an FT140-43 handle?

What is the country of origin?

Where do you put these , on the wire or somewhere else ? I see some say wrapping the wire , do you run it in and out of the ring ?

Can this be used for long wire unun balun? some sites suggest t-130 hence the question.

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