--- product_id: 729025264 title: "GP100 FM Transmitter Antenna Outdoor, 1/4 Wave Professional GP Antenna for 87-108mhz 0.5w-100w FM Broadcast Transmitter, Waterproof FM Antenna with 26FT TNC/BNC Cable" brand: "fmuser" price: "฿8405" currency: THB in_stock: true reviews_count: 5 category: "Fmuser" url: https://www.desertcart.co.th/products/729025264-gp100-fm-transmitter-antenna-outdoor-1-4-wave-professional-gp store_origin: TH region: Thailand --- # 1/4 Wave Omni Radiation 26FT TNC/BNC Cable Included Waterproof Aluminum Build GP100 FM Transmitter Antenna Outdoor, 1/4 Wave Professional GP Antenna for 87-108mhz 0.5w-100w FM Broadcast Transmitter, Waterproof FM Antenna with 26FT TNC/BNC Cable **Brand:** fmuser **Price:** ฿8405 **Availability:** ✅ In Stock ## Summary > 📻 Elevate your FM broadcast game—because your signal deserves to be heard far and wide! ## Quick Answers - **What is this?** GP100 FM Transmitter Antenna Outdoor, 1/4 Wave Professional GP Antenna for 87-108mhz 0.5w-100w FM Broadcast Transmitter, Waterproof FM Antenna with 26FT TNC/BNC Cable by fmuser - **How much does it cost?** ฿8405 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/729025264-gp100-fm-transmitter-antenna-outdoor-1-4-wave-professional-gp) ## Best For - fmuser enthusiasts ## Why This Product - Trusted fmuser brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Versatility:** Includes 26FT TNC cable plus TNC to BNC adapter for seamless compatibility with most FM transmitters. - • **Built to Brave the Elements:** Durable aluminum alloy with waterproof connectors ensures uninterrupted outdoor performance rain or shine. - • **Expand Your Broadcast Reach:** 3dB high gain boosts your FM signal clarity and coverage—reach more listeners effortlessly. - • **Precision Frequency Control:** Low VSWR (<1.1) across 88-108MHz guarantees stable, interference-free transmission every time. - • **Effortless Installation & Optimal Placement:** Omnidirectional low elevation radiation and quick setup let you maximize signal even on shorter masts. ## Overview The GP100 FM Transmitter Antenna is a professional-grade 1/4 wave ground plane antenna designed for 87-108MHz FM broadcast transmitters from 0.5W up to 100W. Featuring a durable waterproof aluminum build, extremely low VSWR for stable transmission, and a 3dB gain for enhanced coverage, it comes with a 26FT TNC cable and TNC to BNC adapter for versatile connectivity. Its omnidirectional low elevation radiation pattern ensures excellent signal reach even on shorter masts, making it ideal for small FM stations or personal broadcasting setups. ## Description Power: Adapted to 1mW -100W (adapted to 0.5w, 1w , 5w, 7w, 10w, 15w,20w, 25w, 30w, 50w, 80w, 100W Transmitter) Adapted models: 05b, 5c, 7c, 15a, 25a and so on Frequency: 88.1-108MHz Center frequency: 87MHz 92 MHz 98 MHz 103 MHz 108 MHz Gain: Omni 3db; Impedance: 50 ohms; Bandwidth: VSWR 1.5 or less than 5MHz; Center standing wave ratio: less than 1.1; Connection: No matter what interface the transmitter can be connected, it contains a TNC male 26FT line, and there is a TNC female to BNC male adapter for you to choose a suitable interface Angle: The vertical radiation angle is 45 degrees. Review: This is an honest, non-solicited, non-compensated review of the FMUSER GP100 FM Transmitter Antenna as sold on desertcart. Before purchasing this item, I read reviews for this antenna from users on desertcart. But first, some brief info about my FM transmitter. It is a NIORFNIO NIODESKTOP –TB SERIES, 6W/15W unit. It came with a telescoping antenna mounted on a heavy metal base, intended to just sit on a flat surface. I modified this arrangement and mounted it on the back side of my house. The top of the antenna was about 2 feet lower than my roofline. I have several FM radios around the house and garage. I got reasonable reception within my home and the signal was just barely receivable in my car to the end of my block. My transmitter was then set to 97.5 MHz, a clear space in the FM band. I was broadcasting Holiday music in my neighborhood during the 2022 winter season. Sometime in early 2023 another strong transmitter was broadcasting on 97.5 MHz, so I abandoned that frequency. I sought out a different clear frequency, which I thought would be 101.1. (explained in next paragraph). I wasn’t getting the clarity or range, so I decided to purchase this new antenna. Upon arriving at my home, I was surprised that the whole system was delivered in a 3-inch x 3-inch, x 17-inch long cardboard box, and placed in a plastic bag mailer. I unpacked all the items as described in the instruction manual. Incidentally, some (early) reviewers complained that instructions were inadequate, or there were no instructions at all. Not the case with my purchase. The manual was fairly well written, with photographs, some even in color. Not explained in the manual was the purpose of the three 24-inch “rods” that extend out from the center, forming a sort of tripod. I’m no broadcast engineer, but I have to assume that they are part of the electro-mechanical characteristic of the antenna. Also not explained was the reason for selecting and installing the correct “frequency bar”. Again, I’d guess these are some sort of band-pass filters to ensure that only the frequency of your transmitter gets through to the antenna, ensuring a clean broadcast. IMPORTANT TIP: Before completely assembling your antenna, make sure you determine a clear frequency in your neighborhood so that you will select the correct “frequency bar”. Initially I set my transmitter to 101.1 MHz, but later found out that there was already a commercial broadcast there. I had a contractor install my antenna on my roof. Once you install the desired frequency bar, you wouldn’t want to have to disassemble the unit and change the bar to your new frequency. To address one reader’s concern about the sharp edge at the bottom of the mast where the coax exits—to extend the mast to mount the antenna to my chimney, I purchased some 1-inch (ID) PVC and placed it at the end of the supplied mast. It helped to get the antenna higher and allowed the three rods to clear the chimney. I also purchased some tubular foam used to insulate copper water pipes. I wrapped the foam insulation around the coax where it exits the 1-inch PVC. OPERATION: I bumped the frequency up to 101.3 and it made a world of difference. Got in my car and had a strong clear signal all the way to my grocery store. According to Google Maps, the Line-Of-Sight distance is about 7,500 feet, or about 1 ½ miles. This through hilly terrain. Review: I use an FM transmitter to broadcast Halloween sounds and Christmas music during daylight hours and I add video to it that is rear projected onto the bay window of my house when it gets dark enough to see it. I was getting about a 1 block range of static free transmission using the rubber duck antenna that came with my FM transmitter. After that distance the signal faded into a noisy mess. I bought this antenna, assembled it, and stuck it onto a broomstick handle stuck in the ground just to see how it would work. I was able to receive a stable signal for several blocks even with the antenna so low to the ground. I plan to mount the antenna on the roof of my house for the next Halloween and Christmas seasons. I would not be surprised if I get a mile of signal coverage once it is at a decent height. By the way... It doesn't take a rocket scientist to assemble this. The antenna came with limited instructions and a diagram showing what went where. It seems well thought out and fairly solid once you snug everything up. ## Features - Omnidirectional low elevation radiation : The FMUSER GP100 is a 1/4 wave Ground Plane Antenna featuring low elevation omnidirectional radiation. This ensures excellent coverage even when installed on shorter masts, making it ideal for small FM radio stations. - Extremely Low VSWR : Operating within the 88-108MHz frequency range, the antenna boasts an extremely low VSWR, ensuring stable transmitter operation and reducing failure rates for more reliable signal transmission. - Durable and Waterproof Design : Made of aluminum alloy with waterproof connectors, the antenna is built for durability. It is easy to install, taking only a few minutes, and is designed to withstand various outdoor environments - High Gain Performance : The antenna provides a 3dB gain, significantly enhancing the transmitter's coverage and signal clarity, allowing you to reach more listeners and offer an improved listening experience. - Versatile Connectivity : The package includes a 26FT TNC coaxial cable and a TNC to BNC adapter, making it compatible with transmitters that have either TNC or BNC female connectors, offering flexible connection options. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09NDPY4JG | | Item model number | GP100 | | Manufacturer | fmuser | | Product Dimensions | 42.01 x 10.01 x 5 cm; 907.18 g | ## Product Details - **Antenna:** Radio - **Brand:** fmuser - **Colour:** Black - **Impedance:** 50 Ohms - **Number of channels:** 1 ## Images ![GP100 FM Transmitter Antenna Outdoor, 1/4 Wave Professional GP Antenna for 87-108mhz 0.5w-100w FM Broadcast Transmitter, Waterproof FM Antenna with 26FT TNC/BNC Cable - Image 1](https://m.media-amazon.com/images/I/51IQgdQ6ptL.jpg) ## Available Options This product comes in different **Model** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by J***N on 18 October 2023* This is an honest, non-solicited, non-compensated review of the FMUSER GP100 FM Transmitter Antenna as sold on amazon. Before purchasing this item, I read reviews for this antenna from users on amazon. But first, some brief info about my FM transmitter. It is a NIORFNIO NIODESKTOP –TB SERIES, 6W/15W unit. It came with a telescoping antenna mounted on a heavy metal base, intended to just sit on a flat surface. I modified this arrangement and mounted it on the back side of my house. The top of the antenna was about 2 feet lower than my roofline. I have several FM radios around the house and garage. I got reasonable reception within my home and the signal was just barely receivable in my car to the end of my block. My transmitter was then set to 97.5 MHz, a clear space in the FM band. I was broadcasting Holiday music in my neighborhood during the 2022 winter season. Sometime in early 2023 another strong transmitter was broadcasting on 97.5 MHz, so I abandoned that frequency. I sought out a different clear frequency, which I thought would be 101.1. (explained in next paragraph). I wasn’t getting the clarity or range, so I decided to purchase this new antenna. Upon arriving at my home, I was surprised that the whole system was delivered in a 3-inch x 3-inch, x 17-inch long cardboard box, and placed in a plastic bag mailer. I unpacked all the items as described in the instruction manual. Incidentally, some (early) reviewers complained that instructions were inadequate, or there were no instructions at all. Not the case with my purchase. The manual was fairly well written, with photographs, some even in color. Not explained in the manual was the purpose of the three 24-inch “rods” that extend out from the center, forming a sort of tripod. I’m no broadcast engineer, but I have to assume that they are part of the electro-mechanical characteristic of the antenna. Also not explained was the reason for selecting and installing the correct “frequency bar”. Again, I’d guess these are some sort of band-pass filters to ensure that only the frequency of your transmitter gets through to the antenna, ensuring a clean broadcast. IMPORTANT TIP: Before completely assembling your antenna, make sure you determine a clear frequency in your neighborhood so that you will select the correct “frequency bar”. Initially I set my transmitter to 101.1 MHz, but later found out that there was already a commercial broadcast there. I had a contractor install my antenna on my roof. Once you install the desired frequency bar, you wouldn’t want to have to disassemble the unit and change the bar to your new frequency. To address one reader’s concern about the sharp edge at the bottom of the mast where the coax exits—to extend the mast to mount the antenna to my chimney, I purchased some 1-inch (ID) PVC and placed it at the end of the supplied mast. It helped to get the antenna higher and allowed the three rods to clear the chimney. I also purchased some tubular foam used to insulate copper water pipes. I wrapped the foam insulation around the coax where it exits the 1-inch PVC. OPERATION: I bumped the frequency up to 101.3 and it made a world of difference. Got in my car and had a strong clear signal all the way to my grocery store. According to Google Maps, the Line-Of-Sight distance is about 7,500 feet, or about 1 ½ miles. This through hilly terrain. ### ⭐⭐⭐⭐⭐ Review *by H***D on 18 January 2026* I use an FM transmitter to broadcast Halloween sounds and Christmas music during daylight hours and I add video to it that is rear projected onto the bay window of my house when it gets dark enough to see it. I was getting about a 1 block range of static free transmission using the rubber duck antenna that came with my FM transmitter. After that distance the signal faded into a noisy mess. I bought this antenna, assembled it, and stuck it onto a broomstick handle stuck in the ground just to see how it would work. I was able to receive a stable signal for several blocks even with the antenna so low to the ground. I plan to mount the antenna on the roof of my house for the next Halloween and Christmas seasons. I would not be surprised if I get a mile of signal coverage once it is at a decent height. By the way... It doesn't take a rocket scientist to assemble this. The antenna came with limited instructions and a diagram showing what went where. It seems well thought out and fairly solid once you snug everything up. ### ⭐⭐⭐⭐⭐ Review *by D***S on 19 November 2024* This antenna works! We tested SWR once assembled for our FM Frequency of 88.7 MHz and it was dead flat 1:1 SWR. Once connected to our ROLLS HR70 FM Transmitter we could drive down the road several businesses down either direction and hear our FM Broadcast signal very well. This test was done only while holding the antenna 6 ft high in our parking lot. If we were to place the FM Antenna higher, say 30 ft I'm am sure the FM Transmitted signal would increase even further away. Good solid construction. Easy to assemble. No brainer! I would highly recommend this FM Antenna to anyone wanting a good FM Broadcast FM Antenna for your Church, Business or School. It works well and SWR is flat on the frequency you assemble the FM Antenna for. ## Frequently Bought Together - FMUSER GP100 FM Transmitter Antenna Outdoor, 1/4 Wave Professional GP Antenna for 87-108mhz 0.5w-100w FM Broadcast Transmitter, Waterproof FM Antenna with 26FT TNC/BNC Cable - NIORFNIO 15W Fm Transmitter - Bluetooth Wireless Stereo Broadcasting Range 87-108mhz Transmitter, Used in Churches, Cars, Shopping Malls, Lecture Halls, Private Radio Stations - DHT Electronics RF coaxial Coax Adapter TNC Male to BNC Female --- ## 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.co.th/products/729025264-gp100-fm-transmitter-antenna-outdoor-1-4-wave-professional-gp](https://www.desertcart.co.th/products/729025264-gp100-fm-transmitter-antenna-outdoor-1-4-wave-professional-gp) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-23*