--- product_id: 562907508 title: "Unlock Optimal Antenna Performance with the GRA-RWSM HF Antenna RF RFI Choke Coil Coax" brand: "gabil" price: "€ 44.00" currency: EUR in_stock: true reviews_count: 13 category: "Gabil" url: https://www.desertcart.pt/products/562907508-unlock-optimal-antenna-performance-with-the-gra-rwsm-hf-antenna store_origin: PT region: Portugal --- # Up to 500W power handling 1.3-55 MHz wide band coverage Significant RF interference reduction Unlock Optimal Antenna Performance with the GRA-RWSM HF Antenna RF RFI Choke Coil Coax **Brand:** gabil **Price:** € 44.00 **Availability:** ✅ In Stock ## Summary > 📡 Elevate your antenna game—ditch noise, embrace clarity! ## Quick Answers - **What is this?** Unlock Optimal Antenna Performance with the GRA-RWSM HF Antenna RF RFI Choke Coil Coax by gabil - **How much does it cost?** € 44.00 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/562907508-unlock-optimal-antenna-performance-with-the-gra-rwsm-hf-antenna) ## Best For - gabil enthusiasts ## Why This Product - Trusted gabil brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Powerhouse:** Small 6.1-inch form factor packs a punch without compromising performance. - • **Plug-and-Play Upgrade:** Easy inline installation enhances any base antenna’s signal clarity instantly. - • **Broadband Compatibility:** Operates seamlessly across 1.3 to 55 MHz bands to fit diverse antenna setups. - • **Reliable Heat Management:** Designed to safely handle heat during transmission—stay safe, stay connected. - • **Crystal-Clear Signal Stability:** Dramatically reduces RF interference for uninterrupted communication. ## Overview The GRA-RWSM HF Antenna RF RFI Choke Coil is a precision-engineered inline stabilizer designed to minimize RF interference and improve signal stability across 1.3 to 55 MHz bands. Compact and robust, it supports up to 500W power and is proven to reduce SWR and unwanted noise, making it an essential upgrade for professional-grade base antenna setups. ## Description Product description The Importance of RFI Choke Experience the GRA-RWSM Radio Wave Stabilizer with integrated RFI Choke, a game-changer in optimizing your radio wave transmissions. Without our stabilizer's RFI Choke in line, users might encounter unwanted RF interference, disrupting signal quality and clarity. However, our innovative design strategically places the RFI Choke at the antenna, such as the 5/8 wave GainMaster, where it plays a pivotal role in mitigating this interference. Significant Reduction in RF Interference Our customer testimonials speak volumes about the GRA-RWSM's effectiveness. They report a dramatic reduction in RF interference after implementing our stabilizer and integrating the RFI Choke in line at the antenna. This unexpected level of effectiveness has pleasantly surprised many, exceeding their initial expectations. The GRA-RWSM Advantage Unlock the power of the GRA-RWSM Radio Wave Stabilizer, a compact yet potent addition for anyone setting up a base antenna. This sophisticated solution addresses and minimizes environmental factors, cable quality issues, installation location challenges, and positioning variations, all of which can negatively impact signal stability. Clear and Reliable Communication At Gabil RADIO, we are dedicated to enhancing your wireless communication experience. The GRA-RWSM undergoes meticulous testing with precision instruments and various antennas, consistently achieving favorable SWR values. By significantly reducing SWR, it helps maintain stable and interference-free radio waves. The GRA-RWSM Radio Wave Stabilizer is a useful tool for those seeking improved signal quality and stability. Customer feedback indicates that it often meets or exceeds expectations, making it a recommended addition to your radio setup. Product Dimensions Overview Product Dimensions: 6.1 x 0.63 x 0.63 inches Item Weight: 2.72 ounces Quantity: 1 pieces Country of Origin: Taiwan Review: Eliminated RFI along feedline back to radio - I was reading some other reviews citing negative or subpar performance in this RFI choke and maybe I am misunderstanding something here. I am by no means an expert on RFI chokes or radio theory, but I would like to share my experience in what this product did manage to do quite well for me. I was looking for a way to eliminate RFI traveling down the feedline back to the radio, coined as "RF in the shack" to some ham operators. I have a PMR-171 backpack radio that I am using an end-fed antenna with 66 ft length of wire and on average no more than 30 watts of power on any mode/band. While my normal shack radio works without issues, the PMR-171 is more sensitive to stray RF. On certain bands when I key the PTT in AM mode, the radio immediately shuts off. On the bands I could get the radio to work I had issues using the USB sound card on the radio with my laptop. When the transmitter would key (and not shut the radio off), the USB interface on my laptop would fail. Therefore I suspected stray RFI coming down the coax into my radio causing the issue. I did a search on desertcart for an RFI choke and came across the GRA-RWSM HF Antenna RF RFI Choke Coil Coax. This is where maybe either I am misunderstanding its intent, or maybe other reviewers are misunderstanding. My understanding this would eliminate RFI coming back into the shack causing the erroneous issues with the radio and laptop, so I purchased this product. I received it today and it appears to have indeed resolve my issues. I am now able to use the PMR-171 without any issues. If i unhook and transmit without it the radio shuts off and laptop USB interfaces become problematic, since it appears RF causes the issue. I see many reviews complaining that it does NOT eliminate noise well. I am able to confirm that electrical noise on the powerlines which I have a LOT of does not decrease or go away when adding this product inline. I do not know that this was the intent of the product. All I can say is if you have RFI in your shack, this product exceeded my expectations and eliminated that problem. Adding this choke in line also had a very tiny impact on SWR. A .1 higher or lower on most bands, but nothing that impacted performances. After hooking the choke in line, I made a contact within minutes 1400 miles away, so performance is great. Construction of the product is 8 out of 10 I would say. I don't see any defects or any issues with the parts and cabling used to make this RFI choke. Quite frankly for it to be small, I am impressed it was able to resolve my issue as I've seen bigger RFI chokes used in many applications. Because of its size, I don't know about the power rating of 500 watts, especially with digital modes and have no way to test. I believe for low power this product makes a great solution. Review: Great bag carry for portable operations - It helps with rfi. ## Features - Without the GRA-RWSM's RF choke in line, some users may experience the presence of unwanted RF interference, which can disrupt signal quality and clarity. However, our stabilizer's design incorporates a strategically placed RF choke at the antenna, such as the 5/8 wave GainMaster, which plays a pivotal role in mitigating this interference. - Our customer's testimonial highlights that after implementing the GRA-RWSM and placing the RF choke in line at the antenna, they witnessed a dramatic reduction in RF interference. This result may come as a pleasant surprise to many, as the stabilizer's effectiveness surpasses initial expectations. - The GRA-RWSM Radio Wave Stabilizer is a small yet powerful add-on that proves invaluable for anyone setting up a base antenna. It functions as a sophisticated solution designed to combat and minimize environmental factors, cable quality, installation location, and positioning, all of which can negatively impact signal stability. Unlock - At Gabil RADIO, we take pride in offering cutting-edge solutions to enhance your wireless communication experience. The GRA-RWSM is meticulously tested with precision instruments and various antennas to consistently deliver impressive SWR values. By significantly reducing SWR, it ensures that your radio waves remain stable and interference-free. In conclusion, the GRA-RWSM Radio Wave Stabilizer is an indispensable tool for those seeking superior signal quality and stability. As evidenced by our - The product is not an antenna and does not have a maximum power handling issue, but exceeding the maximum power can reduce performance. However, we cannot establish a maximum power standard. Currently, power levels and magnetic strength, as well as temperature resistance in the market, can go much higher than 500W. If there must be a standard, it is best to keep it below 500W to avoid affecting the product's performance. - Band:：1.3～55MHz Max power：500W Length：6.1 inch Weight：0.15 puound Connector：MJ-MP - Important Notice: During use, the GRA-RWSM may become hot, which is normal. Whenever transmitting power, the connection points of the cables and the GRA-RWSM in the middle may carry current, leading to heat generation. It is especially critical to avoid touching the antenna during transmission. Even with a transmission power as low as 5W, contact can result in an electric shock or burns. Always exercise caution and ensure no direct contact with the antenna while transmitting to prevent injury. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CHRVBGH3 | | Antenna | Radio | | AntennaDescription | Radio | | Best Sellers Rank | #86 in Two-Way Radio Antennas | | Brand | Gabil | | Color | Black | | Customer Reviews | 4.1 out of 5 stars 181 Reviews | | Impedance | 50 Ohms | | Item Dimensions L x W x H | 6.69"L x 1.18"W x 1.18"H | | Manufacturer | Gabil | | Model Number | GRA-RWSM | | Number of Channels | 1 | | Number of Items | 1 | | Product Dimensions | 6.69"L x 1.18"W x 1.18"H | | UPC | 631851846082 631851845924 | | Unit Count | 1.0 Count | ## Product Details - **Antenna:** Radio - **Brand:** Gabil - **Color:** Black - **Number of Channels:** 1 - **Impedance:** 50 Ohm - **Product Dimensions:** 6.69"L x 1.18"W x 1.18"H - **UPC:** 631851846082 631851845924 - **Manufacturer:** Gabil - **Number of Items:** 1 ## Images ![Unlock Optimal Antenna Performance with the GRA-RWSM HF Antenna RF RFI Choke Coil Coax - Image 1](https://m.media-amazon.com/images/I/51ssWLSGxxL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Eliminated RFI along feedline back to radio *by A***R on June 20, 2024* I was reading some other reviews citing negative or subpar performance in this RFI choke and maybe I am misunderstanding something here. I am by no means an expert on RFI chokes or radio theory, but I would like to share my experience in what this product did manage to do quite well for me. I was looking for a way to eliminate RFI traveling down the feedline back to the radio, coined as "RF in the shack" to some ham operators. I have a PMR-171 backpack radio that I am using an end-fed antenna with 66 ft length of wire and on average no more than 30 watts of power on any mode/band. While my normal shack radio works without issues, the PMR-171 is more sensitive to stray RF. On certain bands when I key the PTT in AM mode, the radio immediately shuts off. On the bands I could get the radio to work I had issues using the USB sound card on the radio with my laptop. When the transmitter would key (and not shut the radio off), the USB interface on my laptop would fail. Therefore I suspected stray RFI coming down the coax into my radio causing the issue. I did a search on Amazon for an RFI choke and came across the GRA-RWSM HF Antenna RF RFI Choke Coil Coax. This is where maybe either I am misunderstanding its intent, or maybe other reviewers are misunderstanding. My understanding this would eliminate RFI coming back into the shack causing the erroneous issues with the radio and laptop, so I purchased this product. I received it today and it appears to have indeed resolve my issues. I am now able to use the PMR-171 without any issues. If i unhook and transmit without it the radio shuts off and laptop USB interfaces become problematic, since it appears RF causes the issue. I see many reviews complaining that it does NOT eliminate noise well. I am able to confirm that electrical noise on the powerlines which I have a LOT of does not decrease or go away when adding this product inline. I do not know that this was the intent of the product. All I can say is if you have RFI in your shack, this product exceeded my expectations and eliminated that problem. Adding this choke in line also had a very tiny impact on SWR. A .1 higher or lower on most bands, but nothing that impacted performances. After hooking the choke in line, I made a contact within minutes 1400 miles away, so performance is great. Construction of the product is 8 out of 10 I would say. I don't see any defects or any issues with the parts and cabling used to make this RFI choke. Quite frankly for it to be small, I am impressed it was able to resolve my issue as I've seen bigger RFI chokes used in many applications. Because of its size, I don't know about the power rating of 500 watts, especially with digital modes and have no way to test. I believe for low power this product makes a great solution. ### ⭐⭐⭐⭐⭐ Great bag carry for portable operations *by R***D on April 26, 2026* It helps with rfi. ### ⭐⭐⭐⭐⭐ Works well . *by A***R on February 8, 2026* Good practice,to use something like this. This one has worked well so far. I never use more than 100 watts,through it. ## Frequently Bought Together - Unlock Optimal Antenna Performance with The GRA-RWSM HF Antenna RF RFI Choke Coil Coax - RFAdapter RG8x Coaxial Cable, CB Coax Cable, 50ft UHF PL259 Male to Male Low Loss CB Antenna Cables, 50 Ohm for HAM Radio, Antenna Analyzer - MOOKEERF RG8x Jumper Cable (3ft, 2 Pack) UHF PL259 Male to Male Low Loss CB Antenna Cable (50 Ohm) for CB, HAM, VHF Radio & Analyzer --- ## 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.pt/products/562907508-unlock-optimal-antenna-performance-with-the-gra-rwsm-hf-antenna](https://www.desertcart.pt/products/562907508-unlock-optimal-antenna-performance-with-the-gra-rwsm-hf-antenna) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-23*