--- product_id: 23272825 title: "Toroid Core FT240-31 Ferrite" brand: "fair-rite" price: "€ 19.20" currency: EUR in_stock: true reviews_count: 13 category: "Fair Rite" url: https://www.desertcart.hr/products/23272825-toroid-core-ft240-31-ferrite store_origin: HR region: Croatia --- # Toroid Core FT240-31 Ferrite **Brand:** fair-rite **Price:** € 19.20 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Toroid Core FT240-31 Ferrite by fair-rite - **How much does it cost?** € 19.20 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/23272825-toroid-core-ft240-31-ferrite) ## Best For - fair-rite enthusiasts ## Why This Product - Trusted fair-rite brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Review: Great for noise reduction - I use this to create a common mode current balun filter on my HF ham radio to reduce the noise level and RF coming back into my radio shack. It works great on the frequencies that it's designed for and I also purchased another one (FT-240-43) for my VHF radio and they both work great. Make sure you put at least 10 turns on the coax through the toroid and you should be okay. I feel the price point is great and they appear to be high quality components. Review: I'm happy - It's a Toroid, it works, good price, and just what I needed. I'm happy ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.7 out of 5 stars 448 Reviews | ## Images ![Toroid Core FT240-31 Ferrite - Image 1](https://m.media-amazon.com/images/I/51O2dNGYN+L.jpg) ![Toroid Core FT240-31 Ferrite - Image 2](https://m.media-amazon.com/images/I/71VOmNTsMhL.jpg) ![Toroid Core FT240-31 Ferrite - Image 3](https://m.media-amazon.com/images/I/61U-n5rx5mL.jpg) ![Toroid Core FT240-31 Ferrite - Image 4](https://m.media-amazon.com/images/I/61JpufZiS-L.jpg) ![Toroid Core FT240-31 Ferrite - Image 5](https://m.media-amazon.com/images/I/61EdXU6FK4L.jpg) ## Questions & Answers **Q: What is the inside & outside diameter ?** A: OD = 2.40 in / 61.0 mm +/- 1.30 mm , ID = 1.40 in / 35.55 mm +/- 0.85 mm , this is also conveniently located in the product description in the listing. **Q: Can these be cut into two identical half toroids? I want create two identical electromagnets.** A: Perhaps the snap-on beads would be a better application. The toroids have a specific shape to keep the magnetic flux within the loop. So while I can’t answer if breaking them will work in your case, but it sounds like using a hammer when you need a wrench. Could it work? Maybe, but bludgeoning seems a bit wasteful. YMMV Maybe try Mix 31 beads. **Q: What's the difference in F240-31 and T120-31?** A: Interior diameter. **Q: Need toroid for 1mhz thru 30 mhz** A: FairRite and the listing description give the following specifications: Frequency Range: 1 - 300MHz , EMI Suppression 1 - 500 MHz ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great for noise reduction *by J***E on March 23, 2026* I use this to create a common mode current balun filter on my HF ham radio to reduce the noise level and RF coming back into my radio shack. It works great on the frequencies that it's designed for and I also purchased another one (FT-240-43) for my VHF radio and they both work great. Make sure you put at least 10 turns on the coax through the toroid and you should be okay. I feel the price point is great and they appear to be high quality components. ### ⭐⭐⭐⭐⭐ I'm happy *by K***. on February 4, 2026* It's a Toroid, it works, good price, and just what I needed. I'm happy ### ⭐⭐⭐⭐⭐ A really great price for a toroid that is perfect for HF ham radio feedlines *by J***. on January 26, 2024* I have purchased several FT-240-31 toroids in the past and always paid a little more. Looking at other reviews it seems, like me, people find these very useful and of good quality but thought they were a bit pricey. In my opinion, however, this seller removed any reason not to give five stars by lowering their price (below what I paid even three years ago). If you are a radio operator & use flexible coaxial cable, like RG-8X or RG-58, to feed your antennas then you are going to love these! Just pass the antenna connector (ex. PL-259) and at least 2' of cable up through the middle of the toroid and use a vinyl cable tie to secure the toroid to the cable so it can't slide. Then, repeat the process of passing the connector/plug up through the center nine more times, winding counter clockwise until you have ten tight loops around the donut. Finally just secure the cable to the toroid body as it exits the 10th time with another cable tie and "Voila", you now have an choke that will keep stray RF energy from using your feedline to interfere with your station equipment and cause noise. Just FYI the "240" describes the size of the donut and you need one this big to work with coaxial cable the size of RG-8X with PL-259 connectors, and the 31 mix is perfect for use with all the HF bands up to 30 MHz. ## Frequently Bought Together - Toroid Core FT240-31 Ferrite - Toroid Core FT240-43 Ferrite - FT-140-43 Ferrite Toroid Core | 43 Material --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/23272825-toroid-core-ft240-31-ferrite](https://www.desertcart.hr/products/23272825-toroid-core-ft240-31-ferrite) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-13*