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

4.7 4.7 out of 5 stars 242 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Electronic Ferrites by Fair-Rite
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FT-140-43 Ferrite Toroid Core - Amidon | 43 Material
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BNTECHGO 16 AWG Magnet Wire - Enameled Copper Wire - Enameled Magnet Winding Wire - 4 oz - 0.0492" Diameter 1 Spool Coil Red
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FT-240-43 FT240-43 Ferrite Toroid Core 43 Material
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 2 x 1 x 2 inches; 2.08 ounces
  • Item model number ‏ : ‎ FT140-43
  • Date First Available ‏ : ‎ December 23, 2016
  • Manufacturer ‏ : ‎ FR
  • ASIN ‏ : ‎ B0178IABXW
  • Customer Reviews:
    4.7 4.7 out of 5 stars 242 ratings

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Customer reviews

4.7 out of 5 stars
4.7 out of 5
242 global ratings

Customers say

Customers like the performance, quality and value of the toroid. They mention that it works well, is of high quality and has a long track record of great performance. Some appreciate the value for money.

AI-generated from the text of customer reviews

15 customers mention15 positive0 negative

Customers are satisfied with the performance of the choke. They mention that it works well for their purposes in building a choke, and is effective against RFI. Some say that it performs as well for insertion loss and CMRR as T240-43 toroids, just with a lower loss.

"worked perfectly for making the un un's and baluns that I wanted" Read more

"these work very well" Read more

"...They perform as well for Insertion loss and CMRR as T240-43 toroids, just with a lower saturation point...." Read more

"...It works great!" Read more

14 customers mention14 positive0 negative

Customers are satisfied with the quality of the toroid. They mention that it works as advertised, has excellent condition, and no defects. Some say that it makes very good current baluns that have typical CMRR's of 25 dB at 3. Overall, most are happy with the product's quality and reliability.

"...For most everyone, these are the critical details. Product sold, good product, fast turnaround, etc...." Read more

"Works as advertised. Excellent condition no defects.. Used as a matching transformer in an EFHW antenna as the. Heart of a 49:1UNUN." Read more

"This T140-43 makes very good current baluns that have typical CMRR's of 25 dB at 3 MHz, and 35 at 30 MHz...." Read more

"Shipping was fast, product was VERY well wrapped and protected. The toroid was as described and good.Thanks" Read more

5 customers mention5 positive0 negative

Customers appreciate the value of the product.

"Item exactly as described with prompt delivery and good value. Perfect core for low power baluns." Read more

"Fast shipping. Reasonable cost. Undamaged. Was able to make a common mode current choke that worked well." Read more

"Worked as needed and price was decent." Read more

"Is exactly what it says. Packaging is excellent, price reasonable. What more could you want?" Read more

A handy trick for covering torrids before winding with enameled wire.
5 Stars
A handy trick for covering torrids before winding with enameled wire.
This is just what I wanted to use for a tapped coil that I am making. Before winding the enameled magnet wire on it you would want to wrap it up with vinyl electrical tape. I didn't have any, silly me. But like they say, necessity is the mother of invention and I would like to pass along my latest fix. I remembered that I have some of the streachy bandage wrap that you find in drug stores and the like. It sticks to itself but not anything else. I cut a piece that was wide enough to stretch inside the torrid from each side overlapping each other, and long enough to go around the outside of the torrid at least once, more than that by the time it's stretched tightly. The strip in the picture is what I trimmed off from the width, and I used a longer piece than the picture shows. Stretch the bandage around the torrid first. Then stretch and force one edge inside the torrid and then the other edge overlapping each other. It covers the torrid smoothly with no wrinkles, and don't stick to your fingers like electrical tape does.
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Top reviews from the United States

Ron Dyke
5.0 out of 5 stars Perfect for making Balun's
Reviewed in the United States on March 10, 2024
Verified Purchase
worked perfectly for making the un un's and baluns that I wanted
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Randall
5.0 out of 5 stars Great Product, Great Service, and even when things don't go perfectly, Greater Reliability
Reviewed in the United States on November 1, 2021
Verified Purchase
The folks at FW Electronics are great. This was a product I needed and wanted. I ordered it and the product arrived quickly and painlessly. Nearly all the way good.

I opened the packaging and noticed a discrepancy between what I ordered and what I received. Quickly a mistake was realized and communicated to FW-Electronics. Of course, these discrepancies can cause problems if you aren't careful. FW-Electronics sent a replacement just as quickly and without additional cost to me. For most everyone, these are the critical details. Product sold, good product, fast turnaround, etc. All of those things I report about FW - Electronics.

Here's the important part of the review:

This company made a mistake, initially. These things happen and nobody was upset. Understanding that toroid core mixes are very specific for use in amateur radio applications (as in other applications). So there's a confidence concern in my case when I lack the test equipment to identify the different mixes.

FW - Electronics helped me visually identify the core types and sent the correct (though properly labeled) toroid cores without cost to me, and let me keep the incorrect toroids (which I still will readily put to good use at my QTH or to a deserving ham learning to use RF chokes).

My point in this detail is I appreciate great products and great service. But I appreciate it so much more when things *don't* go well and the company and staff make it right.

Nobody's perfect, but making it perfect when it isn't shows me the company appreciates the customers' work product and respects their own.

I'll keep coming back to FW!

73 DE K6RCS
11 people found this helpful
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SB
5.0 out of 5 stars Worked awesome as Common Mode Choke with RG316
Reviewed in the United States on February 2, 2024
Verified Purchase
Dropped my noise on a 2m copper J-Pole running RG316 by 3 or 4 S-Units!
Made a HUGE improvement in my office shack.
Ordering a couple more spares now.
One person found this helpful
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OBX Windsurfer
5.0 out of 5 stars Perfect for a feed line choke
Reviewed in the United States on January 26, 2024
Verified Purchase
I was able to get a SWR of better than 1.2 with this at the dipole center at 2 m
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David Indorf
4.0 out of 5 stars Used for Antenna part
Reviewed in the United States on March 11, 2024
Verified Purchase
Works as advertised. Excellent condition no defects.. Used as a matching transformer in an EFHW antenna as the. Heart of a 49:1UNUN.
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Michael A martin
5.0 out of 5 stars thank-you
Reviewed in the United States on October 19, 2023
Verified Purchase
these work very well
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JORGE JARA CE3GRH
5.0 out of 5 stars llego muy rapido a mis manos y muy bien envuelto por lo fragil que resulta este material ferroso
Reviewed in the United States on July 31, 2023
Verified Purchase
este nucleo de ferrita resulta un material muy importante para los radiaficinado. con el se pueden hacer muchos adaptadores de impedancia y funcionan muy bien en los rangos de HF.
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Heavy G
5.0 out of 5 stars A handy trick for covering torrids before winding with enameled wire.
Reviewed in the United States on May 16, 2020
Verified Purchase
This is just what I wanted to use for a tapped coil that I am making. Before winding the enameled magnet wire on it you would want to wrap it up with vinyl electrical tape. I didn't have any, silly me. But like they say, necessity is the mother of invention and I would like to pass along my latest fix. I remembered that I have some of the streachy bandage wrap that you find in drug stores and the like. It sticks to itself but not anything else. I cut a piece that was wide enough to stretch inside the torrid from each side overlapping each other, and long enough to go around the outside of the torrid at least once, more than that by the time it's stretched tightly. The strip in the picture is what I trimmed off from the width, and I used a longer piece than the picture shows. Stretch the bandage around the torrid first. Then stretch and force one edge inside the torrid and then the other edge overlapping each other. It covers the torrid smoothly with no wrinkles, and don't stick to your fingers like electrical tape does.
Customer image
Heavy G
5.0 out of 5 stars A handy trick for covering torrids before winding with enameled wire.
Reviewed in the United States on May 16, 2020
This is just what I wanted to use for a tapped coil that I am making. Before winding the enameled magnet wire on it you would want to wrap it up with vinyl electrical tape. I didn't have any, silly me. But like they say, necessity is the mother of invention and I would like to pass along my latest fix. I remembered that I have some of the streachy bandage wrap that you find in drug stores and the like. It sticks to itself but not anything else. I cut a piece that was wide enough to stretch inside the torrid from each side overlapping each other, and long enough to go around the outside of the torrid at least once, more than that by the time it's stretched tightly. The strip in the picture is what I trimmed off from the width, and I used a longer piece than the picture shows. Stretch the bandage around the torrid first. Then stretch and force one edge inside the torrid and then the other edge overlapping each other. It covers the torrid smoothly with no wrinkles, and don't stick to your fingers like electrical tape does.
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Customer image
13 people found this helpful
Helpful
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