--- product_id: 518559058 title: "Great Scott Gadgets’ Opera Cake – Antenna Switching Add-On Board for HackRF One and Other Software Defined Radios" brand: "generic" price: "AR$763200" currency: ARS in_stock: true category: "Generic" url: https://www.desertcart.com.ar/products/518559058-great-scott-gadgets-opera-cake-antenna-switching-add-on-board store_origin: AR region: Argentina --- # 1MHz-4GHz wideband range 1x8 or dual 1x4 antenna switching CLI & automated frequency/time control Great Scott Gadgets’ Opera Cake – Antenna Switching Add-On Board for HackRF One and Other Software Defined Radios **Brand:** generic **Price:** AR$763200 **Availability:** ✅ In Stock ## Summary > 🔄 Elevate your SDR game with instant antenna agility! ## Quick Answers - **What is this?** Great Scott Gadgets’ Opera Cake – Antenna Switching Add-On Board for HackRF One and Other Software Defined Radios by generic - **How much does it cost?** AR$763200 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/518559058-great-scott-gadgets-opera-cake-antenna-switching-add-on-board) ## Best For - generic enthusiasts ## Why This Product - Trusted generic brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Mode Flexibility:** Use as a single 1x8 switch or paired 1x4 switches for custom filter banks. - • **Enhanced Spectrum Analysis:** Combine with hackrf_sweep for rapid, multi-antenna frequency sweeps under one second. - • **Automated & Manual Switching:** Control via command-line or automate switching by frequency or time for ultimate convenience. - • **Ultra-Wide Frequency Coverage:** Operate confidently across 1 MHz to 4 GHz for versatile SDR applications. - • **Seamless Multi-Antenna Control:** Switch effortlessly between up to 8 antennas without hardware swaps. ## Overview Great Scott Gadgets’ Opera Cake is a precision antenna switching add-on board designed for HackRF One and compatible SDRs, offering a broad 1 MHz to 4 GHz frequency range. It supports flexible configurations as a single 1x8 or dual 1x4 switch, controlled manually or automated via command-line software. Ideal for professionals seeking streamlined multi-antenna setups, it enhances spectrum analysis and transmission routing without hardware hassle. ## Description Opera Cake is an antenna switching add-on board for HackRF One. You can control Opera Cake for HackRF One manually with command-line software, hackrf_operacake, or you can configure HackRF One’s firmware to automatically switch Opera Cake ports based on frequency or time. Automated antenna switching and hackrf_operacake are both available in the latest HackRF One release. You can learn more about Opera Cake’s modes of operation in the HackRF documentation. Its recommended frequency range is 1 MHz to 4 GHz. It has two primary ports, each connected to any of eight secondary ports, and is optimized for use as a pair of 1x4 switches or as a single 1x8 switch. When set up as a pair of 1x4 switches you can use Opera Cake as a switched filter bank. To do this, connect port A1 to B1, A2 to B2, A3 to B3, and A4 to B4 through physical SMA filters and cables of your choosing. This setup allows you to change your transmit or receive to be through the filter of your choosing without having to reconnect hardware every time you would like to use a different filter. As a 1x8 switch, Opera Cake can connect your HackRF to a variety of antennas at once, such as a long wire antenna for HF bands, a discone for VHF and UHF, a dipole for 2.4 GHz, and a dish for a satellite band. Once connected to your Opera Cake you can switch between all of your antennas in software instead of making physical hardware swaps. When HackRF One is used to transmit, Opera Cake can automatically route its output to the appropriate transmit antennas, as well as any external filters, amplifiers, or anything else in your RF chain. No changes are needed to the existing SDR software, but full control from the host is available. Opera Cake also enhances the HackRF One’s use as a spectrum analyzer. Antenna switching works with the existing hackrf_sweep feature, which can sweep the whole tuning range in less than a second. Automatic switching mid-sweep enables the use of multiple antennas when sweeping a wide frequency range. ## Features - Opera Cake is an antenna switching add-on board designed to sit directly on top of the HackRF One - Opera Cake has a recommended frequency range of 1MHz - 4GHz - It is optimized for use as a single 1x8 switch, or as a pair of 1x4 switches. It can be configured via command-line software either manually or through automation (either frequency or time) - Please note that this product is not physically compatible with the plastic enclosure sold with the HackRF, nor with the aluminum enclosure we sell for the HackRF ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BZ6J8NQV | | AntennaDescription | Radio | | Best Sellers Rank | #369 in Computer Networking Antennas #609 in Radio Antennas | | Brand | Generic | | Built-In Media | Add-On Module | | Customer Reviews | 5.0 5.0 out of 5 stars (3) | | Manufacturer | Great Scott Gadgets | | Model Number | 100844 | | Number of Channels | 16 | | Number of Items | 1 | | UPC | 636824571206 | | Unit Count | 1.0 Count | | Warranty Description | 3 month limited warranty | ## Product Details - **Antenna:** Radio - **Brand:** Generic - **Manufacturer:** Great Scott Gadgets - **Number of Channels:** 16 - **Number of Items:** 1 - **UPC:** 636824571206 - **Unit Count:** 1.0 Count ## Images ![Great Scott Gadgets’ Opera Cake – Antenna Switching Add-On Board for HackRF One and Other Software Defined Radios - Image 1](https://m.media-amazon.com/images/I/61JvtHvPYTL.jpg) ## Frequently Bought Together - Great Scott Gadgets’ Opera Cake – Antenna Switching Add-On Board for HackRF One and Other Software Defined Radios - NooElec RF EMI Shield & Board-Level Kit for HackRF One - Nooelec Lana - Ultra Low-Noise Amplifier (LNA) Module for RF & Software Defined Radio (SDR) with Enclosure & Accessories. Wideband 20MHz-4000MHz Frequency Capability with Bias Tee & USB Power Options --- ## 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.com.ar/products/518559058-great-scott-gadgets-opera-cake-antenna-switching-add-on-board](https://www.desertcart.com.ar/products/518559058-great-scott-gadgets-opera-cake-antenna-switching-add-on-board) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-09-07*