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.

What is the country of origin?

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

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.

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

Ft 140 43 Ferrite Toroid Core Amidon 43 Material

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

A$74

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered 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 Australia.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Description

⚙️ Elevate your RF game with precision and power!

WIDEBAND FREQUENCY RANGE - Optimized for 5-400 MHz, perfect for versatile transformer and RFI suppression needs
TRUSTED BY RF ENTHUSIASTS - Preferred choice for low SWR antennas and reliable power transformers
ROBUST FERRITE CORE DESIGN - Lightweight yet durable at just 59g, built to last in demanding electronic environments
HIGH PERMEABILITY 43 MATERIAL - Delivers superior inductance and minimal signal loss for professional-grade performance
PRECISION ENGINEERED DIMENSIONS - Ensures seamless integration with your custom RF projects

The FT-140-43 Ferrite Toroid Core by Fair-Rite features a high AL value of 885 ±20%, supporting wideband frequencies from 5 to 400 MHz. With precise dimensions (OD 35.55mm ±0.75mm, ID 23.0mm ±0.55mm, height 12.7mm ±0.50mm) and lightweight design (59g), it’s engineered for efficient wideband transformers, power transformers, and RFI suppression. Trusted by amateur radio and electronics professionals alike, this core delivers consistent, high-performance inductance for advanced RF applications.

Specifications

ASIN	B0178IABXW
ASIN	B0178IABXW
Batteries Included?	No
Batteries Required?	No
Customer Reviews	4.7 4.7 out of 5 stars (303)
Customer reviews	4.7 4.7 out of 5 stars (303)
Date First Available	23 September 2024
Date First Available	23 September 2024
Is Discontinued By Manufacturer	No
Item Weight	59 g
Item model number	FT140-43
Item model number	FT140-43
Manufacturer	FAIR-RITE
Manufacturer	FAIR-RITE
Material	Type 43 Ferrite
Measurement System	English
Part number	FT140-43
Product Dimensions	5.08 x 2.54 x 5.08 cm; 58.97 g
Product Dimensions	5.08 x 2.54 x 5.08 cm; 58.97 g

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

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

A$74

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered 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 Australia.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

View all Trustpilot reviews

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

Description

Specifications

Common Questions