--- product_id: 297530453 title: "Broadcast FM Block Filter (88-108 MHz Block) by RTL-SDR Blog" brand: "rtl-sdr blog" price: "€ 51.91" currency: EUR in_stock: true category: "Rtl Sdr Blog" url: https://www.desertcart.pt/products/297530453-broadcast-fm-block-filter-88-108-mhz-block-by-rtl store_origin: PT region: Portugal --- # 50dB FM band attenuation SMA female connectors + adapter <0.5 dB insertion loss (0-1 GHz) Broadcast FM Block Filter (88-108 MHz Block) by RTL-SDR Blog **Brand:** rtl-sdr blog **Price:** € 51.91 **Availability:** ✅ In Stock ## Summary > 📡 Cut the noise, keep the signal — your SDR’s new best friend! ## Quick Answers - **What is this?** Broadcast FM Block Filter (88-108 MHz Block) by RTL-SDR Blog by rtl-sdr blog - **How much does it cost?** € 51.91 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/297530453-broadcast-fm-block-filter-88-108-mhz-block-by-rtl) ## Best For - rtl-sdr blog enthusiasts ## Why This Product - Trusted rtl-sdr blog brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ultra-Low Signal Loss:** Insertion loss under 0.5 dB up to 1 GHz ensures your SDR signals stay crystal clear and strong. - • **Pro-Grade Connectivity:** Equipped with SMA female connectors plus a free SMA male-to-male adapter for seamless integration. - • **No-Nonsense Compatibility:** Not for TV installers—engineered for professional RF setups, ensuring you get exactly what you need. - • **Precision FM Band Blocking:** Over 50dB attenuation between 88-108 MHz eliminates broadcast FM interference with surgical accuracy. - • **Tailored for SDR Enthusiasts:** Specifically designed for software-defined radio and scanner users craving interference-free reception. ## Overview The RTL-SDR Blog Broadcast FM Block Filter delivers over 50dB attenuation of the 88-108 MHz FM broadcast band with minimal insertion loss (<0.5 dB up to 1 GHz). Featuring SMA female connectors and a free SMA male-to-male adapter, it’s engineered for software-defined radio and radio scanner users to prevent FM overload and maintain signal integrity. ## Description Includes 1x RTL-SDR Blog Broadcast FM Band-Stop Filter and 1x SMA male to SMA male adapter. Blocks the broadcast FM band between 88 - 108 MHz with over 50dB of attenuation. Designed for RX use only. Insertion loss is less than 0.5 dB between 0 - 1 GHz, and mostly less than 1.5 dB between 1 - 3 GHz. Uses SMA female connectors. Comes with a free SMA male to SMA male adapter. A broadcast FM block filter can help if you have very strong broadcasts in your area that are overloading the SDR dongle. Also known as an "FM Trap". TV installers please read and pay very close attention to the following: This is probably not the right product for you. These filters are designed for software defined radio and radio scanner users. The filter uses SMA connectors. SMA connectors are very common in the professional RF world, but are NOT commonly used in home TV installations. TV installs normally use F-TYPE or PAL connectors. So this filter will not fit onto F-TYPE or PAL connectors which are common in the TV world without the use of an adapter, which is not supplied. ## Features - Blocks the broadcast FM band between 88 - 108 MHz with over 50dB of attenuation. - Insertion loss is less than 0.5 dB between 0 - 1 GHz, and mostly less than 1.5 dB between 1 - 3 GHz. - Uses SMA female connectors. Comes with a free SMA male to SMA male adapter. - Designed for SDR and radio scanner users. TV installers this is probably not the right product for you. TV installers please read the description carefully to avoid disappointment. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01LE9LRPM | | Analog Video Format | PAL | | AntennaDescription | Radio | | Best Sellers Rank | 1,362 in Radio Communication | | Brand Name | RTL-SDR Blog | | Colour | Black | | Compatible Devices | Laptop, Desktop, Radio Scanner | | Connector Type | SMA | | Customer Reviews | 4.6 4.6 out of 5 stars (340) | | Includes Remote | No | | Manufacturer | RTL-SDR Blog | | Manufacturer Part Number | 4330366327 | | Model Number | 4330366327 | | Network Connectivity Technology | Radio Frequency | | Tuner Type | FM | | UPC | 642419993872 | ## Product Details - **Brand:** RTL-SDR Blog - **Colour:** Black - **Compatible devices:** Laptop, Desktop, Radio Scanner - **Connectivity technology:** Radio Frequency - **Connector type:** SMA ## Images ![Broadcast FM Block Filter (88-108 MHz Block) by RTL-SDR Blog - Image 1](https://m.media-amazon.com/images/I/71Dp1kU-pRL.jpg) ## Questions & Answers **Q: Has anyone tried this (with sma-to-f adapters) for tv use? this would result in 50-ohm to 75-ohm mismatch. hard to find traps for tv use.** A: A 50 to 75 Ohm impedance mismatch is completely negligible on RX, so impedance mismatch won't be an issue. **Q: Does this have RG6 cable connections?** A: RG6 is a type of cable, not a connector. But I think you're meaning to ask if it uses F-Type or PAL type TV connectors? No this uses SMA connectors. Please see the product description for more info about the connectors it uses. **Q: What is the max RF input of this device?** A: I would recommend no more than 1W (30dBm), but we have reports of users using them long term with power levels of up to 20W (40dBm) without any issues. **Q: I am trying to target 108 mhz specifically. is there a schematic if i need to alter something? (of course, voids any returns) maybe from 107 to 109 m** A: Sorry, it wouldn't be practical to try to modify this filter to reject a very small band. Having opened mine, IIRC the filter has only a few sections, 3 or 4, in a pi configuration. That means it only has a handful of pole pairs in its transfer function. As the bandwidth narrows, the number of poles required to achieve the required response increases, pretty much as the inverse of the bandwidth. So for a bandwidth 1/10 as wide as the 20 MHz it's designed for, you might need a filter of roughly 10x complexity, as a starting point. That's not really practical, so the system engineer would probably recommend completely different architectures, such as a lowpass or highpass, which still would be quite difficult and require much higher Q (larger) resonators, such as cavities or exotic materials. The other approach would be a tunable bandpass at the frequency of interest. That's not exactly simple, but it's probably far easier. There may be other system options depending on the separation from 108 MHz, the degree of rejection required, the type of modulation involved, etc. ## Frequently Bought Together - Broadcast FM Block Filter (88-108 MHz Block) by RTL-SDR Blog - Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog - RTL-SDR Blog Wideband Low Noise Amplifier Bias Tee Powered --- ## 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/297530453-broadcast-fm-block-filter-88-108-mhz-block-by-rtl](https://www.desertcart.pt/products/297530453-broadcast-fm-block-filter-88-108-mhz-block-by-rtl) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-14*